- 24 Diametral Pitch
 - 20 Teeth
 - 14.5 ° Pressure Angle
 - 0.833" Pitch Diameter
 - 1/2" Nominal Bore
 
description
- All Boston Helicals are cut to the Transverse Diametral Pitch System, resulting in a higher normal Diametral Pitch System number.
 
features
- Smoother operating characteristics
 - Increased contact ratio
 - Greater load carrying capacity
 - Improved tooth strength
 - Parallel and 90° nonintersecting shaft applications
 
| Keyway | With Keyway, w/o Setscrew | 
| Pressure Angle | 14.5 ° | 
| Right / Left Hand | Left Hand | 
| Pitch Diameter | 0.833 in | 
| Diametral Pitch | 24 | 
| Keyway Size | 1/8 x 1/16 | 
| Bore Size | 0.5 in | 
| Length Through Bore | 0.25 in | 
| Hardened Teeth | With Hardened Teeth | 
| Material | Steel-Hardened-All | 
| No. of Teeth | 20 | 
| Outside Dia. | 0.89 in | 
| Weight | 0.041 LB | 
| EAN or UPC | 781711182901 | 
        
