- Boston Gear's stem pinions have a smaller number of teeth than standard spur gears.
- Teeth are cut integral to steel shaft for greater dependability.
- Stem pinions facilitate higher gear ratios than are possible with spur gear drives for improved operation.
- Boston Stem Pinions can be readily used with standard 14 1/2° PA spur gears.
- Available from 20 DP to 6DP (Diametral Pitch)
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