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 ASA Roller Chain
Chains & Sprockets

DESIGN FORMULAS FOR ASA ROLLER CHAIN SPROCKETS

 
Symbol Description Formula Result
N # of teeth Given 20
P Chain pitch Given 0.750
Dr Roller diameter Given 0.4690
CI Pitch line clearance minimum 07 (P-Dr)+.002 0.0217
CIM Pitch mine clearance maximum CI+.003 (Dr)+.005 0.0281
Rm Seating curve radius minimum 5025(Dr)+.0025 0.2372
RM. Seating curve radius maximum Rm+.0015(Dr)+.0025 0.2404
D Pitch diameter P/(sin(180/N)) 4.7943
MM Minor diameter maximum D-Dr 4.3253
Mm Minor diameter minimum MM-(.001*P*SQRT(N)+.003) 4.3190
J J dimension .3*P 0.2250
DO Outside diameter P(.6+cot(180/N)) 5.1852