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Gearbox design; showing every part needed to design a specific gear box (parts taken from boston Catalog)
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Gear box Design
SERVICE FACTOR: 1
Gears:1. Service Factor: 12. Motor specifications:
I. Motor speed: 1750 RPMII. Motor Power: 2.5 HP
3. Diametric pitch of Gears: 124. Pressure Angle: 14.5 degrees5. According to table on page 41 of “BOSTON GEAR Open Gearing” catalog, the pinion
should have 14 teeth.6. Pinion feature:
I. Teeth: 14II. Pitch Diameter: 1.167
III. Bore Size: 0.5 inchesi. Does not have keyway according to “†” note on page 10 of catalog, only has
one set screw.
IV. Hub:
i. Diameter: 0.92 inches
ii. Projection: 0.5 inches
iii. Face: 0.75 inches
V. Catalog and Item number: ND14B-1/2†, 46063
7. Output desired speed: 613 RPM
I. Gear Ratio: 1: (1750/613) = 1:2.855
8. Driven gear Feature:I. Teeth of driven gear: 2.855 X 14 = 39.967 = 40 teeth
II. Pitch Diameter: 3.333
III. Bore size: 0.625 inches
IV. Hub:
i. Diameter: 2.34 inches
ii. Projection: 0.62 inches
iii. Face: 0.75 inches
V. Catalog and item number: ND40A, 10280
i. No Keyway gears available
Couplers and shafts:1. Input shaft:
I. Coupling Insert required:
i. XFCA POLYURETHANE INSERTS FC12 (Speed: 1750 RPM, Maximum Horsepower rating: 3HP)
ii. Catalog and Item number: XFCA12 and 08050
II. Coupler:i. Size: FC12
ii. Catalog and Item number: FC12–1/2 and 08250
iii. Insert 3 Jaw Type2. Output Shaft:
I. Coupling Insert Required:i. XFCA POLYURETHANE INSERTS FC 15 (Speed: 690 RPM, HP: 2.5)
ii. Catalog and Item number: XFCA15 and 08052II. Coupler:
i. Catalog and Item number: FC15–5/8 and 08254ii. Size: FC15
iii. Insert 3 Jaw Type
Bearings:1. Input shaft:
I. R8II. http://www.skf.com/ca/en/products/bearings-units-housings/ball-bearings/deep-groove-
ball-bearings/single-row-deep-groove-ball-bearings/single-row/index.html?prodid=1070020008&imperial=false
2. Output shaft:I. RLS 5
II. http://www.skf.com/ca/en/products/bearings-units-housings/ball-bearings/deep-groove- ball-bearings/single-row-deep-groove-ball-bearings/single-row/index.html?prodid=1070011070&imperial=false