Stern gear - VETUS€¦ · Second bearing for bronze, grp and steel stern tubes Third bearing for steel stern tubes Shaft (D) A B C W J Ø 25 Shaft length Stern tube length 127 112

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C O M M E R C I A L

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Stern gearAssembly

The stern gear is one of the most important systems in a boat and deserves sufficient design attention. A well calculated, manufactured and installed propeller shaft system not only increases comfort under way, but also greatly enhances reliability. VETUS can advise on and calculate: propeller dimensions, shaft diameter, bearing spacings, torque and thrust. With VETUS you can be sure that the entire system is perfectly tuned.

The selection of the correct shaft installation depends on a number of factors. The expected sailing range, installation and anticipated usage are all taken into account when giving advice.

VETUS supplies shafts made from high quality stainless steel, type Duplex 1.4462. Not only is this material highly corrosion resistant, but it also has a greater tensile strength and hardness compared with AISI 316, which means less wear and tear and a much longer life span.

VETUS designs and manufactures both standard and custom made water lubricated propeller shaft systems. The stainless steel shaft is supported in rubber bearings which are mounted in the stern tube. These rubber bearings ensure that vibration and noise are reduced to a minimum.Water injection at the forward end of the stern tube is necessary in order to induce a film of water between the shaft and the rubber bearing, thereby creating a virtually frictionless bearing arrangement. Most importantly, there is no grease used in the stern tube, thus ensuring that the system is “green” and pollution free. As standard, each stern tube is supplied with a rear bearing at the propeller end. Depending on the length of the tube and the calculated bearing spacings, the tube may be supplied with a second or a third bearing.

VETUS can deliver from stock, stern gear assemblies which can be installed with a minimum of fuss. Machining, threading and keyway cutting have all been taken care of by VETUS. Stern tubes are available in bronze, steel and GRP. Stainless steel AISI 316 and aluminium 5083 stern tubes are availeble to special order.

The propeller shaft installation is not complete without a floating inner bearing. This article, code “ZWB” is mounted on the inboard end of the stern tube and follows the movements of the shaft. In addition, this floating inner bearing is equipped with a dual lip seal and a water injection point for cooling and lubrication.

Stern gear assemblies

500 1000 1500 25002000 3000R.P.M.

50

100

200

150

250

300

hpkW400

350

AISI 316DUPLEX 1-4462

300

250

200

150

100

50

Ø50

Ø45

Ø40

Ø35

Ø30

Ø25

Ø50

Ø45

Ø40

Ø35

Ø30

Ø25

500 1000 1500 25002000 3000R.P.M.

1000

1500

2500

2000

3000

3500

Ø60Ø50Ø45Ø40Ø35Ø30Ø25

3500

DUPLEX 1-4462

J A

Propeller shaftsStern gear

Propeller shaftsDuplex stainless steel type 1-4462 propeller shaft, is machined with 1:10 taper and a keyway as standard. Supplied with key and propeller nut with integrated zinc anode. Dimensions of taper and keyway in accordance with ISO 4566.

Material of VETUS propeller shaftsIn comparison with stainless steel materials like AISI 316 and Aquamet 17 or 22, the corrosion resistance of “Duplex 1-4462” is much greater. In addition the tensile strength of “Duplex 1-4462” is about 30% greater than AISI 316 and its hardness is approximately 40% higher. It is precisely this high degree of hardness, which gives “Duplex 1-4462” its excellent running properties in (rubber) bearings.

Dependent on length, diameter and number of shaft revolutions, 1, 2 or 3 cutless bearings must be installed.

ExampleImagine, you have a shaft with a maximum shaft speed of 1400 r.p.m. and a diameter of 30 mm. The diagram shows (blue line) that the maximum distance between 2 bearings amounts to 1600 mm. If you have a shaft of e.g. 1500 mm length, then one rubber bearing will be sufficient. Should you have a shaft of 2000 mm length, in this case 2 rubber bearings have to be used. For shafts with a length of 3200 mm or longer use 3 bearings.

Why use a propeller shaft with a diameter of ø 35 mm, if a ø 30 mm shaft is more than adequate?

All dimensions are in mm

Available types

Type D Shaft lengths (A) F I J O Y Z

SA25/_ Ø 25 1000 / 1500 / 2000 / 2500 / 3000 8 3 40 M16 x 1.5 25 55

SA30/_ Ø 30 1000 / 1500 / 2000 / 2500 / 3000 8 3 57 M20 x 1.5 30 75

SA35/_ Ø 35 on request 10 3 54 M24 x 2 35 85

SA40/_ Ø 40 on request 12 3 64 M24 x 2 35 95

SA45/_ Ø 45 on request 14 3,5 69 M30 x 2 40 105

SA50/_ Ø 50 on request 14 3,5 79 M36 x 2 45 115

Bronze stern tube assembly

Shaft (D) A B K C W J

Ø 25

Shaft lengthStern tube

length

88 210 112 40

Ø 30 105 267 112 57

Ø 35 117 291 112 54

Ø 40 113 327 114 64

Ø 45 145 359 129 69

Ø 50 162 401 129 79

4

X

All dimensions are in mm.

1. Propeller shaft2. Stern tube3. Mounting flange4. Inner bearing

When ordering, please specify dimensions A, B and D.

The shaft end of the bronze stern tube is provided with an outer cutless bearing and a mounting flange. The slots in the tube are designed for easy replacement of the cutless bearing. A second mounting flange (3) can be ordered separately, if required.

Bronze stern tube

Type D Length B K L Ø M N P Q

BL25/_ Ø 25 500 1000 1500 2000 88 90 8,5 110 60 43

BL30/_ Ø 30 500 1000 1500 2000 105 100 8,5 120 67 50

BL35/_ Ø 35 on request 117 110 10,5 132 76 60

BL40/_ Ø 40 on request 113 116 10,5 138 82 63,5

BL45/_ Ø 45 on request 145 150 13 180 93 70

BL50/_ Ø 50 on request 162 165 15 197 99 76,1

2

Type D R S T U V

FLK25 Ø 25 18 86 72 70 Ø 8,5

FLK30 Ø 30 18 90 78 74 Ø 8,5

FLK35 Ø 35 23 112 97 92 Ø 10,5

FLK40 Ø 40 23 116 101 96 Ø 10,5

FLK45 Ø 45 28 132 118 108 Ø 13

FLK50 Ø 50 28 138 125 114 Ø 13

Optional additional mounting flange for stern tube

2 3BR3 BR2

Depending on the length, diameter and RPM of the shaft, there is need for 1, 2 or 3 cutlass bearings.

Type Description

BR225 Second bearing for Ø 25 mm stern tube






Type Description

BR325 Third bearing for Ø 25 mm bronze stern tube






Second bearing for bronze, grp and steel stern tubes Third bearing for bronze stern tubes

Cutless bearings

Sterngear Steel stern tube assembly




The shaft end of the steel stern tube is provided with an outer cutless bearing. The slots in the tube are designed for easy replacement of the cutless bearing. All steel stern tubes may be supplied with additional sleeves to reduce distortion when welding. Please specify when ordering.

Steel stern tube


Type Description







Type Description

BR325S Third bearing for Ø 25 mm steel stern tube






Second bearing for bronze, grp and steel stern tubes Third bearing for steel stern tubes

Shaft (D) A B C W J

Ø 25

Shaft length Stern tube length

127 112 40

Ø 30 172 112 57

Ø 35 184 112 54

Ø 40 206 114 64

Ø 45 226 129 69

Ø 50 254 129 79

Ø 60 287 93 96

OPTIONAL WELDING SLEEVE

Type D Length B K Ø Q

BS25/_ Ø 25 on request 8 51

BS30/_ Ø 30 on request 10 44

BL35S_ Ø 35 on request 10 60

BL40S_ Ø 40 on request 12 63,5


BL50S_ Ø 50 on request 15 76,1


2

2 BR3 BR2

Type Description







➀

➃

➁

This water-lubricated propeller shaft assembly uses a thick walled steel outer tube, which can be welded into a steel boat with minimum distortion. In this steel tube a VETUS bronze stern tube can be easily fitted with the aid of the rubber bushings. The bronze stern tube is supplied as standard with one rear cutless bearing, but additional cutless bearings (intermediate and/or forward) can be supplied upon request at extra cost. The bronze inner tube can be supplied with a VETUS self-aligning inner bearing with dual lip seal, type ZWB. When ordering, please state dimensions A, B, D and E.

Although the inside of the steel tube will not come into contact with water, the assembly is provided with a corrosion resistant coating, to provide additional protection.

D A B C E H J K W Precision steel tube

Ø 35 on request on request 291 on request 60 54 117 112 I.D. = 89 / O.D. = 101.6

Ø 40 on request on request 327 on request 63 64 133 114 I.D. = 89 / O.D. = 101.6

Ø 45 on request on request 359 on request 63 69 145 129 I.D. = 112.8 / O.D. = 127

Ø 50 on request on request 401 on request 63 79 162 129 I.D. = 112.8 / O.D. = 127

Steel outer tube

Sterngear


G.R.P. stern tube assembly



Shaft (D) A B C W J

Ø 25

Shaft lengthStern tube

length

127 112 40

Ø 30 172 112 57

Ø 35 184 112 54

Ø 40 206 114 64

Ø 45 226 129 69

Ø 50 254 129 79

Ø 60 287 93 96

G.R.P. stern tubesThe shaft end of the G.R.P. stern tube is provided with an outer cutless bearing. The stern tubes must be bonded directly into the hull.

Type D Length B K Ø Q

BG25/_ Ø 25 581,5 / 1081,5 / 1581,5 / 2081,5 na 44

BG30/_ Ø 30 595,5 / 1095,5 / 1595,5 / 2095,5 na 50

BG35/_ Ø 35 595,5 / 1095,5 / 1595,5 / 2095,5 na 57

BG40/_ Ø 40 na na na

2

2 BR3 BR2


Type Description







Type Description







Second bearing for bronze, grp and steel stern tubes Third bearing for steel stern tubes

Self-aligning inner bearingThe VETUS flexible inner bearing used in this system has dual sealing lips, as double security against water leakage.

Type D W X

ZWB25A Bronze flexible inner bearing, Ø 25 mm, with dual lip seal 112 144






ZWB60 Bronze flexible inner bearing, Ø 60 mm, with dual lip seal na na

Type Description

WCAPSET Water scoop kit for Ø 25-30-35 mm. shaft

WCAPS1/2 Water scoop kit for Ø 40-45-50 mm. shaft

There are two possibilities for water lubrication of these shaft assemblies:1. By means of a water scoop G3/8, with ball valve, hose pillar,

1 metre of water hose and hose clamps (optional kit).2. By tapping a small amount of water from the main engine’s raw

water cooling circuit.

Water lubrication connections

Available for shaft diameters between Ø 20 mm and Ø 100 mm and from Ø 1” through Ø 4”. Polyurethane-rubber lining. Outer bushings made of either brass or phenolic resin. Phenolic resin is lighter in weight, cannot corrode and may be replaced very easily - ideal for use in aluminium boats. VETUS rubber bearings are also available for larger shaft diameters to special order.

Water lubricated cutless bearings

Brass shell

Phenolic shell

A B** C

RULAGER20 RULAG25PH 20 * 11/4 76

RULAGER22 22 * 11/4 76

RULAGER25 25 11/2 100

RULAGER30 RULAG30PH 30 13/4 120





RULAGER55 55 * 27/8 220

RULAGER60 RULAG60PH 60 3 240

RULAGER65 65 * 33/8 260


RULAGER80 RULAG80PH 80 4 320

Brass shell

Phenolic shell

A B C

RL2540 RL2540PH 25 40 100

RL3045 RL3045PH 30 45 120

RL3550 RL3550PH 35 50 140

RL4055 RL4055PH 40 55 160

RL4565 RL4565PH 45 65 180

RL5070 RL5070PH 50 70 200

RL6080 RL6080PH 60 80 240

RL7090 RL7090PH 70 90 280

RL8010 RL8010PH 80 100 320

RL9011 RL9011PH 90 110 360

RL1012 RL1012PH 100 125 400

Brass shell

Phenolic shell

A B C

RULAG1 RL1PH 1 11/2 4

RULAG11/8 RL11/8PH 11/8 15/8 41/2

RULAG11/4 RL11/4PH 11/4 13/4 5

RULAG13/8 RL13/8PH 13/8 17/8 51/2

RULAG11/2 RL11/2PH 11/2 2 6

15/8 21/8 61/2

RULAG13/4 RL13/4PH 13/4 23/8 7

RULAG2 RL2PH 2 25/8 8

RULAG21/4 RL21/4PH 21/4 3 9

RULAG21/2 RL21/2PH 21/4 31/4 10

RULAG23/4 RL23/4PH 21/4 33/4 11

RULAG3 RL3PH 3 4 12

RULAG31/2 RL31/2PH 31/4 41/2 14

RULAG4 RL4PH 4 5 16

Rubber bearings with shaft size (A) in mm and shell size (B) in inches. Length (C) in mm.

Rubber bearings with shaft size (A) in mm and shell size (B) in mm. Length (C) in mm.

Rubber bearings with shaft size (A) in inches and shell size (B) in inches. Length (C) in inches.

* Available to special order.** Used in VETUS stern gear.

Sterngear

VETUS Commercial | Stern gear | Assembly | v2

VDR 2 10_VDR 2 15_VDR 2 21_VDR 4 21_VDR 4 30_VDR 6 30_VDR 6 42_

Product overview

• Reduction of noise and vibration on board

• Easy mounting and alignment of the propeller shaft

• Compact design with short installation length

VDR - Constant-velocity joint with integral thrust bearing

Documents

Stern gear - VETUS€¦ · Second bearing for bronze, grp and steel stern tubes Third bearing for steel stern tubes Shaft (D) A B C W J Ø 25 Shaft length Stern tube length 127 112