Tolerances
Bore Diameter Tolerances
(Always on plus side. Minus=.000″)
| Bore Diameters | Tolerance -.000″ |
| Up to 2″ | +.002″ |
| 2″ to 3″ | +.003″ |
| Over 3″ | +.004″ |
Closer than standard bore tolerances listed above can be had at additional cost depend-
ing upon tolerance and finish desired.
Face Run Out
(On Type A plate sprockets.)
| OutsideDiameter | IndicatorReading |
| Up to 12″ | .030″ |
| 12″ to 18″ | .050″ |
| 18″ to 24″ | .080″ |
| 24″ and Over | .125″ |
Eccentricity
(Measured from Bore to bottom of Teeth)
| BottomDiameters | IndicatorReading |
| Up to 4″ | .006″ |
| 4″ to 5″ | .008″ |
| 5″ to 7″ | .010″ |
| 7″ to 9″ | .012″ |
| 9″ to 11″ | .014″ |
| 11″ to 13″ | .016″ |
| 13″ to 15″ | .018″ |
| 15″ to 20″ | .020″ |
| 20″ to 25″ | .024″ |
| 25″ to 35″ | .026″ |
| 35″ to 45″ | .028″ |
| 45″ to 60″ | .032″ |
| 60″ to 75″ | .040″ |
| 75″ to 100″ | .048″ |
Plate Thickness
(On Type A plate sprockets)
| ChainNo. | PitchInches | PlateThickness | Tolerance | |
| 35 | 3/8 | .168″ | +.006″ | -.027″ |
| 40 | 1/2 | .284″ | +.006″ | -.035″ |
| 41 | 1/2 | .227″ | +.006″ | -.035″ |
| 50 | 5/8 | .343″ | +.007″ | -.036″ |
| 60 | 3/4 | .459″ | +.009″ | -.036″ |
| 80 | 1 | .575″ | +.015″ | -.040″ |
| 100 | 1-1/4 | .692″ | +.020″ | -.046″ |
| 120 | 1-1/2 | .924″ | +.024″ | -.057″ |
| 140 | 1-3/4 | .924″ | +.024″ | -.057″ |
| 160 | 2 | 1.156″ | +.035″ | -.062″ |
| 180 | 2-1/4 | 1.301″ | +.040″ | -.068″ |
| 200 | 2-1/2 | 1.389″ | +.050″ | -.070″ |
| 240 | 3 | 1.738″ | +.062″ | -.080″ |
Standard Keyways & Standard Setscrews
| ShaftDiameters | KeywayWidth & Depth | Setscrew |
| 1/2″ to 9/16″ | 1/8″ x 1/16″ | 1/4″ NC |
| 5/8″ to 7/8″ | 3/16″ x 3/32″ | 1/4″ NC |
| 15/16″ to 1-1/4″ | 1/4″ x 1/8″ | 1/4″ NC |
| 1-5/16″ to 1-3/8″ | 5/16″ x 5/32″ | 5/16″ NC |
| 1-7/16″ to 1-3/4″ | 3/8″ x 3/16″ | 3/8″ NC |
| 1-13/16″ to 2-1/4″ | 1/2″ x 1/4″ | 1/2″ NC |
| 2-5/16″ to 2-3/4″ | 5/8″ x 5/16″ | 5/8″ NC |
| 2-13/16″ to 3-1/4″ | 3/4″ x 3/8″ | 3/4″ NC |
| 3-5/16″ to 3-3/4″ | 7/8″ x 7/16″ | 7/8″ NC |
| 3-13/16″ x 4-1/2″ | 1″ x 1/2″ | 1″ NC |
| 4-9/16″ to 5-1/2″ | 1-1/4″ x 5/8″ | 1″ NC |
| 5-9/16″ to 6-1/2″ | 1-1/2″ x 3/4″ | 1″ NC |
| 6-9/16″ to 7-1/2″ | 1-3/4″ x 5/8″ ** | 1″ NC |
| 7-9/16″ to 8-15/16″ | 2″ x 3/4″ ** | 1″ NC |
**Standard Flat Keyways.