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Product Specifications:
| Item | Spur Gear |
| Bore Dia. | 0.313" |
| Bore Diameter | 5/16" |
| Diametral Pitch | 20 |
| Face Width | 3/8" |
| Hub Design | Hub Without Set Screw |
| Hub Dia. | 0.45" |
| Hub Diameter | 0.46" |
| Hub Projection | 0.38" |
| Hub Projection (in.) | 0.38 |
| Keyway | No |
| Material | Steel |
| Number Of Teeth | 12 |
| Outside Dia. | 0.7" |
| Overall Length | 0.755" |
| Pitch | 20 |
| Pitch Dia. | 3/5" |
| Pitch Diameter | 0.6" |
| Pressure Angle | 14.5° |
| Pressure Angle (deg.) | 14 1/2 |
| Product Datasheet | boston-gear-g101.pdf |
| Setscrew | Not Included |
| Standards | Agma |
| System Of Measurement | Imperial |
Shipping Info:
| Ship weight (kg) | 0.05 |
| Ship height (cm) | 1.27 |
| Ship length (cm) | 1.92 |
| Ship width (cm) | 3.81 |
| HS code | 8483409000 |
| Country of Origin | US |
Documentation:
Product Variants
| Product | Model | Face Width | Diametral Pitch | Pitch Dia. | Hub Dia. | Bore Dia. | Hub Projection | Number Of Teeth | Outside Dia. | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
![]() |
NA32 | 3/8" | 20 | 1 3/5" | 1.31" | 3/8" | 0.5" | 32 | 1.7" | €91.19 | |
![]() |
NA11B | 0.38" | 20 | - | - | - | - | - | - | €43.38 | |
![]() |
NA13B | 3/8" | 20" | 0.65" | 1/2" | 0.313" | 0.38" | - | - | €46.15 | |
![]() |
NA14B | 3/8" | 20" | 0.7" | 14/25" | 0.313" | 0.38" | - | - | €49.23 | |
![]() |
NA15B | 3/8" | 20" | 3/4" | 3/5" | 3/8" | 0.38" | - | - | €50.76 | |
![]() |
NA16B | 3/8" | 20" | 4/5" | 0.66" | 3/8" | 0.38" | - | - | €52.60 | |
![]() |
NA18B | 3/8" | 20" | 0.9" | 0.74" | 3/8" | 0.38" | - | - | €54.15 |
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BOSTON GEAR NA12B Spur Gear, 20 Diametral Pitch, 14 1/2 Deg. Pressure Angle, 12 Teeth, Steel
€48.67 /unit






