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Product Specifications:
| Item | Spur Gear |
| Bore Dia. | 3/8" |
| Bore Type | Minimum Plain Bore |
| Diametral Pitch | 20 |
| Face Width | 3/8" |
| Hardened Teeth | Without Hardened Teeth |
| Hub Dia. | 1 1/4" |
| Key Way Size | No Keyway Or Set Screw |
| Keyway | No Kwy, Setscrew |
| Length Through Bore | 7/8" |
| Material | Cast Iron |
| Max. Rated Torque | 60.6 N-m @ 900 RPM |
| Max. Torque | 60.6 lbs.-in. @ 900 RPM |
| No. Of Teeth | 72 |
| Origin | Reborable |
| Outside Dia. | 3.77" |
| Pitch Dia. | 3.6" |
| Pressure Angle | 14.5° |
| Product Datasheet | boston-gear-g101.pdf |
| Set Screw | No |
| Style | Hub |
| Torque @ 1200 Rpm | 50.7 lbs.-in. |
| Torque @ 200 Rpm | 111 lbs.-in. |
| Torque @ 300 Rpm | 99.4 lbs.-in. |
| Torque @ 600 Rpm | 75.3 lbs.-in. |
| Torque @ 900 Rpm | 60.6 lbs.-in. |
| Type | B |
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 | Pitch Dia. | No. Of Teeth | Face Width | Hub Dia. | Diametral Pitch | Bore Dia. | Type | Hub Projection | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
![]() |
NA70 | 3 1/2" | 70 | 0.38" | 1 1/4" | 20 | - | - | - | €159.74 | |
![]() |
NA80 | 4" | 80 | 3/8" | 1 1/4" | 20" | 1/2" | Web | 1/2" | €164.52 | |
![]() |
NA84 | 4.2" | 84 | 3/8" | 1 1/4" | 20 | 1/2" | B | - | €174.56 | |
![]() |
NA90 | 4 1/2" | 90 | 3/8" | 1 1/4" | 20" | 1/2" | Web | 1/2" | €182.33 | |
![]() |
NA96 | 4.8" | 96 | 3/8" | 1 1/4" | 20 | 1/2" | C | - | €190.40 | |
![]() |
NA100 | 5" | 100 | 3/8" | 1 1/4" | 20" | 1/2" | Spoke | 1/2" | €197.41 | |
![]() |
NA112 | 5.6" | 112 | 3/8" | 1 1/2" | 20 | 1/2" | D | - | €246.44 |
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BOSTON GEAR NA72 Spur Gear, 20 Diametral Pitch, 14 1/2 Deg. Pressure Angle, 72 Teeth, Cast Iron
€162.14 /unit







