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Product Specifications:
| Item | Spur Gear |
| Bore Dia. | 1/8" |
| Diametral Pitch | 48" |
| Face Width | 1/8" |
| Hub Dia. | 0.34" |
| Hub Projection | 0.19" |
| Material | Brass |
| No. Of Teeth | 21 |
| Output Dia. | 12/25" |
| Overall Length | 5/16" |
| Pitch Dia. | 0.438" |
| Pressure Angle | 20° |
| Product Datasheet | boston-gear-g101.pdf |
| Type | Plain |
Shipping Info:
| Ship height (cm) | 2.54 |
| Ship length (cm) | 0.79 |
| 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. | Bore Size | Hub Projection | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
![]() |
Y4812 | 1/4" | 12 | 0.13" | 0.17" | 48 | - | 0.13" | - | €40.77 | |
![]() |
Y4815 | 0.31" | 15 | 0.13" | 0.22" | 48 | - | 0.13" | - | €44.30 | |
![]() |
Y4818 | 0.38" | 18 | 0.13" | 0.28" | 48 | - | 0.13" | - | €49.38 | |
![]() |
Y4824 | 1/2" | 24 | 0.13" | 0.38" | 48 | - | 0.19" | - | €54.15 | |
![]() |
Y4827 | 0.56" | 27 | 0.13" | 0.44" | 48 | - | 0.19" | - | €54.30 | |
![]() |
Y4830 | 0.63" | 30 | 0.13" | 0.44" | 48 | - | 0.19" | - | €63.69 | |
![]() |
Y4836 | 3/4" | 36 | 1/8" | 1/2" | 48" | 0.188" | - | 1/4" | €65.85 |
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Contact us
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BOSTON GEAR Y4821 Spur Gear, 48 Diametral Pitch, 20 Deg. Pressure Angle, 21 Teeth, Brass
€53.84 /unit







