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Product Specifications:
| Item | Gear |
| Bore Dia. | 3/4" |
| Bushing Series | GA Series |
| Diametral Pitch | 16 |
| Face Width | 1/2" |
| Hardened Teeth | Without Hardened Teeth |
| Hub Dia. | 1.81" |
| Keyway | Double Keyway 180° Apart |
| Kwy/setscrew/other | With Double Kwy Only |
| Length Through Bore | 1" |
| Material | Cast Iron |
| Maximum Rated Torque | 98.1 N-m @ 900 RPM |
| Maximum Torque Rating | 98.1 lbs.-in. @ 900 RPM |
| No. Of Teeth | 56 |
| Outer Dia. | 3.63" |
| Pitch Dia. | 3 1/2" |
| Pressure Angle | 14.5° |
| Product Datasheet | boston-gear-g101.pdf |
| Torque At 1200 Rpm | 82.2 lbs.-in. |
| Torque At 200 Rpm | 178 lbs.-in. |
| Torque At 300 Rpm | 160 lbs.-in. |
| Torque At 600 Rpm | 121 lbs.-in. |
| Torque At 900 Rpm | 98.1 lbs.-in. |
Shipping Info:
| Ship weight (kg) | 0.36 |
| Ship height (cm) | 2.54 |
| Ship length (cm) | 2.54 |
| Ship width (cm) | 2.54 |
| Country of Origin | US |
Documentation:
Product Variants
| Product | Model | Face Width | Diametral Pitch | Pitch Dia. | Hub Dia. | Type | Pressure Angle | Bore Dia. | Number Of Teeth | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
![]() |
GB41B | 1/2" | 16" | 2.563" | 1 14/25" | Plain | 14.5° | 3/4" | - | €165.81 | |
![]() |
GB42B | 1/2" | 16" | 2 5/8" | 1 14/25" | Plain | 14.5° | 3/4" | - | €170.01 | |
![]() |
GB43B | 1/2" | 16 | 2.688" | 1.56" | - | 14.5° | 3/4" | - | €173.79 | |
![]() |
GB44B | 1/2" | 16" | 2 3/4" | 1 14/25" | Plain | 14.5° | 3/4" | - | €173.79 | |
![]() |
GB45B | 1/2" | 16" | 2.813" | 1 14/25" | Plain | 14.5° | 3/4" | - | €173.79 | |
![]() |
GB46B | 1/2" | 16" | 2 7/8" | 1 14/25" | Plain | 14.5° | 3/4" | - | €179.07 | |
![]() |
GB47B | 1/2" | 16" | 2.938" | 1 14/25" | Plain | 14.5° | 3/4" | - | €179.07 |
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Contact us
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We're available Monday through Friday, from 07:30 until 17:00.
BOSTON GEAR GB56B Change Gear, 16 Diametral Pitch, 14 1/2 Deg. Pressure Angle, 56 Teeth, Cast Iron
€188.87 /unit







