Norma Profili Scanalati ISO_500-X

ISO 10998:2008/DAMD 1

© ISO 2010 – All rights reserved 1

Agricultural tractors — Requirements for steering

Page 9, Clause 5.4.1.5

Add the following sentence as last sentence of Clause 5.4.1.5:

"This provision does not apply to track-laying tractors (e.g. differential, articulated, and combination wheeled and track-laying tractors)."

Page 9, Clause 5.4.16

Add the following sentence as last sentence of Clause 5.4.1.6:

"This provision does not apply to track-laying tractors (e.g. differential, articulated, and combination wheeled and track-laying tractors)."

WORKING DRAFT ISO/WD 500-1


Agricultural tractors — Rear-mounted power take-off types 1, 2, 3 and 4 — Part 1: General specifications, safety requirements, dimensions for master shield and clearance zone

1 Scope

This part of ISO 500 give general specifications, including speeds, safety requirements, the dimensions for master shield and clearance zones for rear-mounted power take-offs (PTO's) of types 1, 2, 3 and 4 on agricultural tractors with a track setting of more than 1150 mm (those with track setting width of 1150 mm or less are covered in ISO 500-2).

2 Normative reference(s)

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 5673-2, Agricultural tractors and machinery - Power take-off drive shafts and power input connection – Part 2: Specification for use of PTO drive shafts, and position and clearance of PTO drive line and PIC for various attachments

ISO 6489 (all parts), Agricultural vehicles – Mechanical connections on towing vehicles

3 Terms and definitions

For the purpose of this document, the following terms and definitions apply.

3.1 power take-off shaft PTO external shaft on the rear of the tractor to provide rotational power to implements

4 Specifications

4.1 The tractor rear PTO is classified into four types (see Table 1).

4.2 The direction of PTO rotation shall be clockwise when viewed from behind the tractor.

4.3 The nominal PTO rated rotational frequency may be realized by one or more engine speed ranges.

ISO/WD 500-1

2 © ISO 2010 – All rights reserved

Table 1 - Characteristics of PTO types

PTO type Nominal diameter

mm

Number and type of splines

Nominal PTO rated rotational frequency

min-1

Recommended PTO power at rated engine speeda)

kW

1 35 6 straight splines 540 up to 60

1000b) up to 92

2 35 21 involute splines 1000 up to 115

3 45 20 involute splines 1000 up to 275

4 57.5 22 involute splines 1300 up to 450 a) Determined in accordance with ISO 789-1 or OECD code 1 or 2

b) This option is not available in North America

5 PTO-speed requirements for shiftable PTO

5.1 Should more than one ratio between the engine speed and the PTO rotation speed be provided, any change of ratio shall be indicated. In addition, specific design measures shall be taken to ensure that unintentional changes of ratio - in particular changing to a higher rotational speed - cannot occur. This safety device shall operate each time the PTO is engaged.

5.2 A means to indicate when the PTO is operating at which nominal speed shall be provided.

6 Safety requirements

6.1 The PTO master shield, as shown in Figure 1 and Table 2, shall be supplied by the tractor manufacturer and shall be fixed to the tractor. If the same degree of safety protection is reached and the clearance zone is respected, equivalent protection devices (e.g. towing hook or clevis supports) can be used instead of the master shield. In this case, provisions shall be made for anchoring the restraining member of the PTO drive-shaft guard.

6.2 If necessary the PTO master shield, or a part of the shield, may be movable without detachment from the tractor, to facilitate attachment of the PTO drive shaft. The movable portion of the master shield shall be resistant to unintentional movement when in the operating position. The master shield may be made of flexible material.

6.3 If the PTO master shield can be used as a step, it shall withstand a vertical static load of 1200 N without permanent deformation.

6.4 An additional non-rotating casing which fully covers the PTO may also be supplied with the tractor to cover the PTO when the PTO is not in use.

7 Dimensions for tractor master shield aperture and clearance zone of PTO

The dimensions of the tractor master shield aperture and the clearance zone around the PTO shall be in accordance with Figure 1 and Table 2. In Table 2, in addition to dimension p of 360 mm for PTO type 3, the dimension of 290 mm is optionally allowed for tractor rear PTO to accommodate component attachments.

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ISO/WD 500-1


Key 1 Hole 3 1) The clearance may be restricted by movable and/or detachable devices. The clearance zone on towing vehicles shall be in accordance with ISO 6489 and ISO 5673-2. 2) Angle optional under consideration of clearance zone. 3 For coupling up the restraining member of the PTO drive shaft guard preventing guard rotation.

Figure 1 – Tractor master shield aperture and clearance zone around PTO

ISO/WD 500-1


Table 2 – Tractor master shield controlling dimensions for aperture and clearance zone dimensions

Dimension PTO type

1 2 3 a 4

a min 76 mm 76 mm 90 mm 100 mm

α min 60° 60° 60° 60°

ß min 50° 50° 50° 50°

γ min 45° 45° 45° 45°

SRr max 76 mm 76 mm 90 mm 90 mm

k min 70 mm 70 mm 80 mm 80 mm

m ± 5 mm 125 mm 125 mm 150 mm 150 mm

n ± 5 mm 85 mm 85 mm 100 mm 100 mm

p ±10 mm 290 mm 290 mm 360 mm b 360 mm

r max 76 mm 76 mm 90 mm 90 mm a For tractors equipped with the PTO type 3 that can be adapted to also provide a PTO type 1 or 2, the master shield needs only meet the specifications in Figure 1 and Table 2 for the PTO type 3. b In addition, 290 mm is optionally allowed for tractor rear PTO to accommodate component attachments.

ISO/WD 500-1


Bibliography

[1] ISO 789-1:1990, Agricultural tractors - Test procedures - Part 1: Power test for power take-off

[2] OECD code1, OECD standard code for the official testing of agricultural and forestry tractor performance

[3] OECD code 2; OECD restricted standard code for the official testing of agricultural and forestry tractor performance

WORKING DRAFT ISO/WD 500-3


Agricultural tractors — Rear-mounted power take-off types 1, 2, 3 and 4 — Part 3: Main PTO dimensions and spline dimensions, location of PTO

1 Scope

This part of ISO 500 specifies manufacturing requirements for, and the location of, rear-mounted power take-offs (PTOs) of types 1, 2, 3, and 4 on agricultural tractors.

2 Normative reference(s)


ISO 4156*), Straight cylindrical involute splines – Metric module, side fit – Generalities, dimensions and inspection

ISO 6508:1986, Metallic materials – Hardness test – Rockwell test (scales A - B - C - D - E - F - G - H - K)

*) in preparation

3 PTO location

The location of the PTO on the tractor shall be in accordance with Figure 1 and Table 1.

The location of the PTO axis shall lie within the shaded rectangle shown in Figure 8 and in accordance with Table 8, parallel to the longitudinal axis of the tractor and should be parallel to the ground within ± 3º.

The value of the dimension h (see Table 1) are for normal agricultural applications. On tractors especially designed for high ground clearance, such as working in standing vegetable crops or sugar cane, hmax, may exceed the given values. On agricultural tractors designed for low ground clearance, such as lawn mowing or ground care which require a low centre of gravity, hmin, may be less than the given values.

ISO/WD 500-3


Dimensions in millimetres

1) centre line of tractor 2) track width

Figure 1 – PTO location

Table 1 – PTO location


PTO-Type hmin hmax

1 480 800

2 530 900

3 600 1000

4 600 1000

4 Manufacturing requirements – Main PTO and spline dimensions

The dimensions of the rear PTO on agricultural tractors and the mating part of the PTO drive shaft shall comply with:

Figure 2 and Table 2, for PTO dimensions;

Figure 3 and Table 3, for external, straight sided spline dimensions – Type 1;

Figure 4 and Table 4, for internal straight sided spline dimensions – Type 1;

Figure 5 and Table 5, for external, involute spline dimensions – Type 2;

ISO/WD 500-3


Figure 6 and Table 6, for internal, involute spline dimensions – Type 2;


Figure 8 and Table 8, for internal, involute spline dimensions – Type 3;


Figure 10 and Table 10, for internal, involute spline dimensions – Type 4.

The hardened portion of the splines shall have a minimum surface hardness of 48 HRC when tested in accordance with ISO 6508

NOTE For general spline informations, including inspection, see ISO 4156.

ISO/WD 500-3


a) Type 1

b) Types 2, 3 and 4

Figure 2 – PTO dimensions

Table 2 – PTO dimensions


Dimensions Type 1 Type 2 Type 3 Type 4

A Groove to end of shaft 38 ± 0,8 25,5 ± 0,8 38 ± 0,8 50 ± 0,8

B Effective spline length and hardened portion

≥ 76 ≥ 64 ≥ 89 ≥ 100

C Chamfer 6 10+ 5 1

0+ 6 1

0+ 8 1

0+

D Chamfer angle 30° ± 3° 30° ± 3° 30° ± 3° 30° ± 3°

E ID of groove 29,40 ± 0,1 29,40 ± 0,1 37,25 ± 0,1 48 ± 0,1

R Radius of groove 6,8 ± 0,25 6,8 ± 0,25 8,4 ± 0,25 10,4 ± 0,25

ISO/WD 500-3



Figure 3 – External, straight sided spline dimensions – Type 1

Table 3 – External, straight sided spline dimensions – Type 1


Dimension Symbol Value

Number of teeth Z 6

Major diameter DEE 34,87 –0,12

Form diameter DFE ≤ 30,00

Minor diameter DIE 29,00 –0,10

Tooth thickness max. eff. SVMAX 8,64

Tooth thickness max. act. REF SMAX ( 8,60 )

Tooth thickness min. act. SMIN 8,51 Allowed form variations Composite GO gage has priority

Total profile variation FF 0,020

Total lead variation FB 0,015

Total index variation FP 0,040

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ISO/WD 500-3



Figure 4 – Internal, straight sided spline dimensions – Type 1

Table 4 – Internal, straight sided spline dimensions – Type 1


Dimension Symbol Value

Number of teeth Z 6

Major diameter DEI 34,95 –0,05

Form diameter DFI ≥ 34,50

Minor diameter DII 29,80 –0,15

Space width max. act. EMAX 8,76

Space width min. act. REF EMIN (8,71)

Space width min. eff. EVMIN 8,69 Allowed form variations Composite GO gage has priority




ISO/WD 500-3



Figure 5 – External, involute spline dimensions – Type 2

Table 5 – External, involute spline dimensions – Type 2


Dimension Symbol Value For alternative imperial pin size

Number of teeth Z 21

Module M 1,5875

Pressure angle ALP 30°

Pitch diameter D 33,338

Base diameter DB 28,8711





Tooth thickness max. act. REF SMAX (2,369)

Tooth thickness min. act. SMIN 2,306

Pin diameter DRE 3,50 3,048

Dim. over pins max. REF MREMAX (39,00) (37,759)

Dim. over pins min. MREMIN 38,906 37,662 Allowed form variations Composite GO gage has priority




Concentricity DEE to D 0,03

ISO/WD 500-3



Figure 6 – Internal, involute spline dimensions – Type 2

Table 6 – Internal, involute spline dimensions – Type 2




Module M 1,5875




Major diameter DEI 34,925 +0,036


Minor diameter DII 31,750 +0,150



Space width min. eff. EVMIN 2,494

Pin diameter/flattened DRI 2,75/2,60 2,743/2,60

Dim. between pins max. MRIMAX 29,380 29,403

Dim. betw. pins min. REF MRIMIN (29,290) (29,315) Allowed form variations Composite GO gage has priority




Concentricity DEI to D 0,02

ISO/WD 500-3








Module M 2,1167












Dim. over pins min. MREMIN 48,142 48,321 Allowed form variations C o m p o s i t e g o g a g e h a s p r i o r i t y





ISO/WD 500-3



Figure 8 – Internal involute spline dimensions – Type 3

Table 8 – Internal involute spline dimensions – Type 3




Module M 2,1167










Pin diameter DRI 3,75 3,658







ISO/WD 500-3








Module M 2,50












Dim. over pins min. MREMIN 63,523 63,548 Allowed form variations Composite GO gage has priority





ISO/WD 500-3



Figure 10 – Internal, involute spline dimensions – Type 4

Table 10 – Internal, involute spline dimensions – Type 4




Module M 2,500










Pin diameter DRI 4,50 4,496







ISO/WD 500-3


Bibliography

[1] ISO 4156 (all parts), Straight cylindrical involute splines – Metric module, side fit

WORKING DRAFT ISO/WD bbbbb


Tractors and machinery for agriculture and forestry — Speed Identification Symbol (SIS)

1 Scope

1.1 The scope of this standard is primarily directed to identifying agricultural equipment (implements of husbandry) that have been designed in their original equipment configuration for specified ground speeds greater than 40 km/h but under 65 km/h.

1.2 The standard applies to self propelled, semi-integral and towed equipment moving on public roads.

1.3 The Speed Identification Symbol (SIS) identifies the maximum equipment ground speed based on the ground speed design capability of the specified piece of equipment. Requirements for the presence of the SIS may be the subject of various regional standards and/or regulations and in some instances may be prohibited for use.

1.4 The SIS will be used in conjunction with the Slow Moving Vehicle Emblem (SMV Emblem), ISO/WD xxxxx.

1.5 The SIS will convey the above information to other operators on public roads approaching from behind the equipment, or for notifying authorities of the equipment’s specified ground speed capabilities.

1.6 Mounting of the SIS on the front of towed equipment will serve to alert operators of the towing vehicle of the maximum specified ground speed capabilities at which the equipment combination may be operated.

2 Normative References


ISO 3864–1:2002, Graphical symbols – Safety colours and safety signs – Part 1: Design principles for safety signs in workplaces and public areas

ISO/WD 12934, Tractors and machinery for agriculture and forestry – Basic types – Definitions and classifications1)

ISO/WD xxxxx, Slow moving vehicle identification emblem1)

PSTC–1, Pressure Sensitive Tape Council standard

ASTM D1014-02, Standard practice for conducting exterior exposure tests of paints and coatings on metal surfaces

__________________________

1) under preparation

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For the purposes of this document, the following definitions apply.

3.1 Equipment Combination Ground Speed Limitation The minimum specified ground speed of any individual machine in a towed equipment combination

3.2 Implements of husbandry A vehicle or special mobile equipment manufactured, designed, or reconstructed for agricultural purposes and, except for incidental uses, primarily used in the conduct of agricultural operations. Included is agricultural equipment in mounted, semi-integral or towed configurations that are transported by the mobile equipment

3.3 Implements of husbandry A vehicle or special mobile equipment manufactured, designed, or reconstructed for agricultural purposes and, except for incidental uses, primarily used in the conduct of agricultural operations. Included is agricultural equipment in mounted, semi-integral or towed configurations that are transported by the mobile equipment

3.4 Public road (highway) The entire width between the boundary lines of every road publicly maintained when any part thereof is open to the use of the public for purposes of vehicular travel. Term includes highways not limited to trucks and cars, county, municipal roads, and lanes

3.5 Specified ground speed Maximum ground speed for which the vehicle, towed or semi mounted equipment has been designed, in its original equipment configuration, giving due consideration to requirements on tire capacity, tracking, stability, braking and other related factors

NOTE Specified ground speeds for self-propelled equipment shall be with the largest rolling diameter tires available as original equipment, and at the maximum rated engine speed in the top transmission gear or speed range as specified by the original equipment manufacturer.

3.6 Speed Identification Symbol (SIS) A sign or emblem, displayed on the equipment or vehicle, used to designate the maximum specified ground speed for which a vehicle or towed machine has been designed to operate

3.7 Towed equipment combination Multiple towed machines behind a single towing machine

4 Dimensions

The SIS is circular in shape, 200 mm in overall diameter (see Figure1).

The black border shall be 10 mm wide, inset from the outside diameter by 5 mm (max).

The field or center portion and the outside border shall be white.

The Specified Ground Speed, rounded to the nearest increments of (e.g.: 40, 45, 50) shall be shown in black.

The text centered below the Specified Ground Speed number shall be the units of measure for the speed. The units shall be either in km/h or mile/h as appropriate for the intended market.

ISO/WD bbbbb


The grouping of the number specified in 4.4 and the text specified in shall be approximately centered with the field.

Letter sizing shall be as specified in Table 1.

Table 1 — SIS letter sizing

Character height Line thickness

Numbers 75 mm 12 mm

"k", "l", and "h" 25 mm 5 mm

"m", "I" and "e" 18 mm 5 mm

5 Materials, performance and test requirements

5.1 Visibility

The symbol shall be visible at night as a circle from all distances between 91 and 30 m from the rear when directly in front of lawful vehicle low beam headlights.

5.2 Dimensional requirements

The emblem size shall be as shown in Figure 1.


Figure 1 — Speed Identification Symbol (SIS)

5.3 Performance requirements

Samples shall be exposed to the sun for a minimum test period of 24 months outside in south Florida, or similar natural climatic conditions, at an angle of 45° to horizontal facing upward and south, per ASTM D1014. After exterior durability testing, the material shall show no cracking, crazing, blistering, loss of adhesion, or dimensional change.

5.4 Adhesion

Material shall be applied with a pressure sensitive adhesive having a minimum adhesive value of 3.6 kg/cm width, when pulled at the rate of 30.5 cm/min at 180° angle. Adhesion test shall be performed as specified in PSTC-1.

5.5 Color measurement

Color measurement shall be per Table 1.

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Table 1 — Chromaticity coordinates for transilluminated signs

Colour 1 2 3 4

White x 0,350 0,305 0,295 0,340

y 0,360 0,315 0,325 0,370

Black x 0,385 0,300 0,260 0,345

y 0,385 0,270 0,310 0,395 NOTE Chromaticity coordinates of corner points determining the permitted color area for standard illuminated D65 and CE 2° standard oberver.

6 Application and Positioning

6.1 Application

On all equipment with a specified ground speed greater than 40 km/h but less than 65 km/h:

a) a Speed Identification Symbol (SIS) shall be used, and

b) a Slow Moving Vehicle (SMV) emblem shall be used.

On equipment with a specified ground speed equal to or less than 40 km/h:

c) a Slow Moving Vehicle (SMV) emblem shall be used, but

d) a Speed Identification Symbol (SIS) is optional

6.2 Positioning

6.2.1 Rear facing SIS

The symbol shall be mounted with the numbers upright in a plane perpendicular to the direction of travel and 610° on the y and z-axis as shown in figure 2 when the machine is in transport position.

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a) y Axis (Rear View) b) Z Axis (Side View)

Key 1 Machine/Vehicle 2 SIS 3 Direction of travel

Figure 2 — SIS positioning

The symbol shall be located 0.6 to 3 m above the ground measured from the bottom edge of the symbol.

The symbol shall be unobscured to the extent that the circular shape is readily identifiable both day and night. Preferred mounting is to the right of the centerline of the equipment.

Only the SIS on the rearmost machine of combinations of towed equipment need be visible from behind.

6.2.2 Forward facing SIS

A forward facing SIS may be used as a means of informing the operator of the towing machine of the specified ground speed of the towed machine. If used, it shall be mounted on the towed machine in a position that is readable from the operator’s platform of the towing machine.

The dimensions of the forward facing SIS shall be 25% to 100% of the dimensions of the rear facing SIS, i.e. 50 to 200 mm overall diameter, with the size of the numbers and letters adjusted proportionally.

6.2.3 Towed Equipment Combinations

If used, only the forward facing SIS, on the lead towed machine, need be visible from the operator’s platform. The requirements of clause 7.1 shall apply.

7 Operating Instructions for Towing Vehicles

The operator’s manual shall state that when towing equipment combinations, the maximum equipment combination ground speed shall be limited to the lowest specified ground speed of any of the towed machines.

The operator’s manual shall state that the maximum travel speed is that specified in the operator’s manual, SIS, or information sign of towed equipment, or the limit of the road conditions, whichever is the lesser.

WORKING DRAFT ISO/WD ccccc


Tractors and machinery for agriculture and forestry — Slow moving vehicle identification emblem (SMV emblem)

1 Scope

This International Standard establishes specifications that define a unique identification emblem, the Slow Moving Vehicle Emblem (SMV Emblem), to be used only for slow moving machines (vehicles), when operated or traveling on public roads. The requirements and applications of the standard are defined in the standard. The purpose is to communicate to third parties the slower speed capabilities of the slow moving vehicle to other vehicle(s) using public roads. The primary application of this SMV emblem will be with implements of husbandry but may be used with other machines or vehicles that travel at speeds less than 40 km/h and in combination with a Speed Information Symbol (SIS) on vehicles which travel at speeds between 40 km/h and 65 km/h.

This International Standard establishes emblem dimensional specifications, performance requirements, related test procedures, mounting requirements and applications of the emblem. Requirements for the presence of the SMV may be the subject of various regional standards and/or regulations and in some instances may be prohibited for use.

The SMV emblem shall complement but not replace warning devices such as tail lamps, reflectors, or flashing lights.

The dimensions and color patterns of the emblem have been established as a unique identification and shall not be altered to permit advertising or other markings on the face of the emblem, except as required in clause 4.2 Emblem Marking.

2 Normative References


ANSI/ASAE S277.2: FEB03, Mounting Brackets and Socket for Warning Lamp and Slow-Moving Vehicle (SMV) Identification Emblem

ASTM D1014-93: 1999, Method for Conducting Exterior Exposure Tests of Paints on Steel

ASTM D2794-02, Test Method for Resistance of Organic Coatings to the Effects of Rapid Deformation (Impact)

ASTM D4549-00, Specification for Polystyrene Molding and Extrusion Materials (PS)

ASTM D4673-02, Specification for Acrylonitrile-Butadiene-Styrene (ABS) Molding and Extrusion Materials

ASTM D4956-01, Standard Specification for Retroreflective Sheeting for Traffic Control

ASTM E284-03, Terminology of Appearance

ASTM E308-01, Test Method for Computing the Colors of Objects by Using the CIE System

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ASTM E991-95, Practice for Color Measurement of Fluorescent Specimen

ASTM E1247-92, Standard Test Method for Identifying Fluorescence in Object-Color Specimens by Spectrophotometry

ASTM E1349-(90): 1998, Test Method for Reflectance Factor and Color by Spectrophotometry Using Bi-Directional Geometry

PSTC-1, Pressure Sensitive Tape Council

SAE J575: JUN92, Test Methods and Equipment for Lighting Devices and Components for Use on Vehicles Less Than 2032 mm in Overall Width

SAE J594: Jul95, Reflex Reflectors

ISO/WD 12934 Tractors and machinery for agriculture and forestry – Basic types – Definitions and classifications1)

ISO/WD bbbbb, Tractors and machinery for agriculture and forestry – Speed Identification Symbol (SIS) 1)


For the purposes of this document, the following definitions apply.

3.1 implement of husbandry a vehicle or specific mobile equipment manufactured, designed or reconstructed for agricultural purposes and, except for incidental uses, primarily used in the conduct of agricultural operations

Note Included is agricultural equipment in mounted, semi-integral or towed configurations that are transported by the mobile equipment.

3.2 machine (vehicular) mounted emblem SMV emblem as illustrated in Figure 1 permanently secured to a slow moving machine (vehicle)

3.3 movable emblem emblem as illustrated in Figure 1 securely affixed to a backing material as illustrated in Figure 2 that shall be displayed on a slow-moving machine (vehicle)

3.4 public road (highway) the entire width between the boundary lines of every road publicly maintained when any part thereof is open to the use of the public for purposes of vehicular travel

Note Term includes highways not limited to trucks and cars, county and municipal roads and lanes.

3.5 slow-moving machine (vehicle) animal-drawn or motorized conveyance, including implements in tow, that is designed for and travels at rates of speed less than those specified in clause 6.2

__________________________

1) under preparation

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Figure 1 – Slow-moving vehicle identification emblem


Figure 2 – Mounting material corner radius and mounting hole location

3.6 slow Moving Vehicular Emblem red-orange fluorescent equilateral triangle with a red retro-reflective border positioned with a point of the triangle up

4 Description

4.1 The SMV emblem

The SMV emblem (Figure 1) consists of a fluorescent, orange equilateral triangle with a red retroreflective. The red-orange fluorescent triangle provides for daylight identification. The red retroreflective border appears as a hollow red triangle in the path of motor vehicle headlights at night. The emblem may be machine mounted or movable as defined in clauses 3.2 and 3.3.

4.2 Emblem Marking

The emblem manufacturer shall place the name and address of the company on the face of the SMV emblem, and shall CERTIFY that the emblem is in compliance with this International Standard ISO xxxxx. This information shall be clearly and permanently marked on the face of the emblem. It shall appear only in the lower center or lower right-hand corner of the emblem. On movable emblems, the information may be located on the reverse side of the mounting material. When the information is located on the face of the emblem, it

ISO/WD ccccc


shall not include trademarks, symbols, or other types of promotional communications, and the total area used for such information on the face of the emblem shall not exceed 6,5 cm2.

5 Materials, performance and test requirements

5.1 Retroreflective materials

5.1.1 Visibility

The SMV emblem shall be visible at night as a hollow red triangle from all distances between 305 and 30 m from the rear when directly in front of lawful vehicle low beam headlights.

5.1.2 Dimensional requirements

The retroreflective material size shall be as shown in Figure 1.

5.1.3 Construction

Retroreflective sheeting shall consist of a smooth, flat, transparent exterior film with retroreflective elements embedded or suspended beneath the film so as to form a non-exposed retroreflective optical system. A folded reflex reflector meeting the requirements of SAE 594 is acceptable.

5.1.4 Performance requirements

Retroreflective sheeting shall meet requirements of ASTM D4956 for type V sheeting except for the photometric requirements and shall meet the minimum photometric performance requirements specified in Table 1. The sheeting shall meet the color specification limits in Table 2. The reflex reflector shall meet the requirements of SAE 594.

Table 1 – Minimum photometric performance (candela/lx/m2)

Observation angle Entrance angle Red requirements

0,2 – 4 60

0,2 30 60

0,2 45 15

0,5 – 4 15

0,5 30 15

0,5 45 4

Table 2 – Color specification limits (daytime)

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5.1.5 Exterior durability

Samples mounted on backing material specified in this International Standard shall be exposed to the sun for a minimum test period of 24 months outside in south Florida, or similar natural climatic conditions, at an angle of 45° to horizontal facing upward and south, per ASTM D1014. After exterior durability testing, the material shall show no cracking, crazing, blistering, loss of adhesion, or dimensional change, and shall meet the requirements in tables 1 and 2 when measured at 0,2° observation angle, and -4° entrance angle, at temperatures between 16 and 38°C and relative humidity at 20 to 80%.

5.1.6 Corrosion resistance

Material shall show no corrosion or edge fading and meet requirements of table 1 measured at 0,2° observation angle, and -4° entrance angle in accordance with ASTM D4956, clause 8.3, after corrosion testing as specified in SAE J575, clause 3.4.

5.1.7 Adhesion

Emblem Material shall meet the adhesive requirements of ASTM D4956.

5.2 Fluorescent materials

5.2.1 Visibility

The SMV emblem shall be visible in the daylight as a red-orange fluorescent triangle from all distances between 305 and 30 m.


The fluorescent triangle size shall be as shown in Figure 1.

5.2.3 Construction

The fluorescent materials shall be of sufficient thickness and strength and toughness to meet the requirements of clause 5.2.5.

5.2.4 Performance requirements

The red-orange color, purity, luminance, and peak reflectance of the fluorescent material shall comply with specifications of Table 3 before and after the durability test.


Samples mounted on mounting material specified in 5.3.2 shall be exposed to the sun for a minimum test period of 24 months outside in south Florida, or similar natural climatic conditions, at an angle of 45° to horizontal facing upward and south, per ASTM D1014. After the durability test, the emblem material shall show no cracking, crazing, blistering, loss of adhesion, or dimensional change, and shall meet the requirements set forth in this Standard.

5.2.6 Color measurement

The spectrophotometric color values of the fluorescent material shall be determined by using a colorimetric spectrophotometer conforming to the requirements of ASTM E991. Luminance shall be compared to that of a NIST (National Institute of Standards and Testing) defined perfect reflecting diffuser (PRD) for CIE (Color Institute) illumant D65. As these fluorescent identification emblems can be expected to be viewed with an angular subtend of <4° at the eye, it is recommended that the CIE XYZ values be calculated using the CIE 1931 (2°) standard observer and CIE illuminant D65. The CIE chromaticity coordinates, X and Y, shall be calculated as given below and defined in clause 7.4 of ASTM E308.

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CIE Y = CIE Y

CIEZYXXX++

= CIEZYX

YY++

=

For example, given CIE X = 37,87, Y = 34,05, and Z = 32,18 for 2° D65 conditions, luminance factor Y = 34,05, chromaticity values are x = 0,3638 and y = 0,3271. The dominant wavelength and purity shall be determined using x and y from CIE diagrams. The values of Y shall be the luminance factor recorded as percent (luminance, %). From the spectral reflectance data, the maximum reflectance shall be no lower than the values shown in Table 3.

Table 3 – Fluorescent values

Before exposure test After exposure test

Dominant wavelength, nm 602 - 610 ≥ 585

Purity, % ≥ 84 ≥ 77

Luminance, % ≥ 28 ≤ 50

Peak reflectance observable at wavelength nearest dominant, %

> 100 ≥ 75

5.2.7 Adhesion

Material shall be applied with a pressure sensitive adhesive having a minimum adhesive value of 3,6 kg/cm width, when pulled at the rate of 30,5 cm/min at 180° angle. Adhesion test shall be performed as specified in PSTC-1.

5.3 Mounting material for movable emblems


The mounting material size shall be as shown in Figure 1, with corner radius and mounting holes as shown in Figure 2, for use as a movable emblem with the mounting brackets specified in ANSI/ANSE S277.2.

5.3.2 Construction

Mounting material for movable identification emblems shall be equivalent to 1,0 mm minimum thickness aluminum; 22 gage 0,8 mm minimum thickness mill-galvanized coated sheet steel; or 2,0 mm minimum thickness ABS plastic as specified in ASTM D4673 or 2,0 mm high impact polystyrene plastic as specified in ASTM D4549. The edges of the backing material shall be shaped to minimize personal injury during handling and when mounted on a slow-moving vehicle.


The mounting material shall be weatherable, semirigid, and have a surface receptive to a durable bond.

5.3.4 Drop test

A movable emblem shall be dropped from a height of 1,8 m to a smooth, hard surface equivalent to rigid metal or concrete. Each movable emblem shall be submitted to three drop tests; corner drop, edge drop, and flat face surface drop. Failure shall be considered to have occurred when the emblem or the backing material will no longer meet the requirements of this International Standard. The drop test shall be conducted at both 24 °C and -23 °C.

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5.3.5 Impact resistance

This test procedure provides the means of determining the force required to fracture backing material by a freefalling impact hammer dropped vertically. The impact hammer shall be 15,88 mm diameter and have a 15,88 mm nose radius. The base shall be 31,8 mm diameter. The test specimen shall be a minimum of 102 mm square. Test conditions shall be at room temperature of 24 ± 2°C, and failure shall be evidence of fracture or rupture of the backing material (see ASTM D2794).

5.4 Minimal requirements

All of these requirements are minimal and do not preclude the use of materials having superior performance.

6 Application and Positioning

6.1 Position of emblem

6.1.1 The emblem shall be mounted with the point of the triangle upward (Figure 3).

Figure 3 – Slow Moving Vehicle Emblem mounting tolerances

6.1.2 Emblems shall be mounted with the point of the triangle with a 610 degrees of vertical (y axis) tolerance, and a plane perpendicular to the direction of travel within 610° (z axis), Figure 3 when the machine is in the transport position.

6.1.3 The emblem shall be displayed as near to the rear and centered, or as near to the left of center of the vehicle or equipment as practical. It shall be located 0,6 to 3 m above the ground measured from the lower edge of the emblem.

6.1.4 The emblem shall be securely and rigidly affixed to the equipment. Movable emblems may be mounted by using the socket and bracket specified in ANSI/ASAE S277, or by other means that provide secure and rigid attachment.

6.1.5 The effective retroreflectivity and fluorescence of the emblem shall be unobscured to the extent that the triangular shape is readily identifiable both day and night.

6.2 Application of SMV emblem

6.2.1 This SMV emblem shall be used only on slow moving machines (vehicles).

6.2.1.1 On slow moving machines (vehicles) with design specifications of a maximum speed of 40 km/h or less, the SMV emblem shall be used.

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6.2.1.2 On slow moving machines (vehicles) with design specifications of speed greater than 40 km/h but not exceeding 65 km/h:

1) a SMV emblem shall be used, and

2) a Speed Identification Symbol (SIS) shall be used.

6.2.2 The SMV emblem shall not be used to identify objects that are permanently stationary.

6.2.3 The SMV emblem shall be removed or covered when being transported at speeds other than those described in section 6.2.1.1 and 6.2.1.2.

6.2.4 The speed that a slow moving machine (vehicle) shall travel is that specified in the operator’s manual, instructions or information sign, or the limit of the road conditions, whichever is the lesser for the machine, or any combination of slow moving machines (vehicles) including combinations of towed equipment.

6.2.5 All slow moving self-propelled and towed equipment shall have a SMV emblem mounted on the machine if conveyed in a public road. Integral equipment that will obscure any portion of the SMV emblem of the machine on which it is mounted when transported, shall have it’s own SMV emblem.

Documents

Norma Profili Scanalati ISO_500-X