Selection Criteria
R1 = D/d = Sprocket Ratio
R2 = D/l = Drive Aspect Ratio
R3 = c/d = Constant Ratio
R1 must be less than 4
R2 should be less than or equal to 0.5
R3 should be less than or equal to 0.85
Multiple Sprocket Applications Standard Criteria
Standard SI not applicable.
Use SI-SG1 or SI-SG2
