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Product Specifications:
| Item | Gear |
| Bore Dia. | 1.38" |
| Bushing Series | GA Series |
| Diametral Pitch | 8 |
| Face Width | 1 1/4" |
| Hardened Teeth | Without Hardened Teeth |
| Hub Dia. | 2.06" |
| Keyway | Double Keyway 180° Apart |
| Kwy/setscrew/other | With Double Kwy Only |
| Length Through Bore | 2 1/2" |
| Material | Cast Iron |
| Max. Rated Torque | 482 N-m @ 900 RPM |
| Max. Torque | 482 lbs.-in. @ 900 RPM |
| No. Of Teeth | 33 |
| Outside Dia. | 4.38" |
| Pitch Dia. | 4 1/8" |
| Pressure Angle | 14.5° |
| Product Datasheet | boston-gear-g101.pdf |
| Torque @ 1200 Rpm | 660 lbs.-in. |
| Torque @ 200 Rpm | 1513 lbs.-in. |
| Torque @ 300 Rpm | 1340 lbs.-in. |
| Torque @ 600 Rpm | 997 lbs.-in. |
| Torque @ 900 Rpm | 794 lbs.-in. |
Shipping Info:
| Ship weight (kg) | 1.53 |
| Ship height (cm) | 2.54 |
| Ship length (cm) | 2.54 |
| Ship width (cm) | 2.54 |
| Country of Origin | US |
Documentation:
Product Variants
| Product | Model | Pitch Dia. | No. Of Teeth | Hub Dia. | Diametral Pitch | Bore Dia. | Type | Kwy/setscrew/other | Max. Torque | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
![]() |
GH25B | 3 1/8" | 25 | 2.06" | 8 | 1 3/8" | - | With Double Kwy Only | 338.5 lbs.-in. @ 1200 RPM | €335.66 | |
![]() |
GH26B | 3 1/4" | 26 | 2.06" | 8 | 1 3/8" | - | With Double Kwy Only | 347 lbs.-in. @ 1200 RPM | €343.96 | |
![]() |
GH28B | 3 1/2" | 28 | 2.06" | 8" | 1 3/8" | Plain | With Double Keyway Only | - | €352.26 | |
![]() |
GH29B | 3 5/8" | 29 | 2.06" | 8 | 1 3/8" | - | With Double Kwy Only | 444.7 lbs.-in. @ 900 RPM | €368.10 | |
![]() |
GH30B | 3 3/4" | 30 | 2.06" | 8" | 1 3/8" | Plain | With Double Keyway Only | - | €372.91 | |
![]() |
GH31B | 3 7/8" | 31 | 2.06" | 8 | 1.38" | - | With Double Kwy Only | 470.5 lbs.-in. @ 900 RPM | €383.94 | |
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GH32B | 4" | 32 | 2.06" | 8 | 1.38" | - | With Double Kwy Only | 476.4 lbs.-in. @ 900 RPM | €391.33 |
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BOSTON GEAR GH33B Change Gear, 8 Diametral Pitch, 14 1/2 Deg. Pressure Angle, 33 Teeth, Cast Iron
€416.23 /unit







