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Product Specifications:
| Item | Spur Gear |
| Bore Dia. | 1/2" |
| Diametral Pitch | 20" |
| Face Width | 3/8" |
| Hub Dia. | 1 1/2" |
| Hub Projection | 1/2" |
| Keyway Size | No Keyway Or Set Screw |
| Material | Cast Iron |
| No. Of Teeth | 144 |
| Output Dia. | 7.37" |
| Overall Length | 7/8" |
| Pitch Dia. | 7 1/5" |
| Pressure Angle | 14.5° |
| Product Datasheet | boston-gear-g101.pdf |
| Type | Spoke |
Shipping Info:
| Ship weight (kg) | 0.81 |
| Ship height (cm) | 2.54 |
| Ship length (cm) | 2.22 |
| Ship width (cm) | 2.54 |
| Country of Origin | US |
Documentation:
Product Variants
| Product | Model | Diametral Pitch | Pitch Dia. | Face Width | Hub Dia. | Bore Dia. | Hub Projection | Type | Overall Length | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
![]() |
NA70 | 20 | 3 1/2" | 0.38" | 1 1/4" | - | - | - | - | €159.74 | |
![]() |
NA72 | 20 | 3.6" | 3/8" | 1 1/4" | 3/8" | - | B | - | €162.14 | |
![]() |
NA80 | 20" | 4" | 3/8" | 1 1/4" | 1/2" | 1/2" | Web | 7/8" | €164.52 | |
![]() |
NA84 | 20 | 4.2" | 3/8" | 1 1/4" | 1/2" | - | B | - | €174.56 | |
![]() |
NA90 | 20" | 4 1/2" | 3/8" | 1 1/4" | 1/2" | 1/2" | Web | 7/8" | €182.33 | |
![]() |
NA96 | 20 | 4.8" | 3/8" | 1 1/4" | 1/2" | - | C | - | €190.40 | |
![]() |
NA100 | 20" | 5" | 3/8" | 1 1/4" | 1/2" | 1/2" | Spoke | 7/8" | €197.41 |
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BOSTON GEAR NA144 Spur Gear, 20 Diametral Pitch, 14 1/2 Deg. Pressure Angle, 144 Teeth, Cast Iron
€348.36 /unit







