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638 Dim. is + .005; 750 Dim. is + .005-.000.
Idler Ball Bearing
Ball Bearing Idler Sprocket Hardened Teeth
Unit of Measure
Items Idler Ball Bearing
35BB20H
Ball Bearing Idler Sprocket Hardened Teeth
Idler Ball Bearing
40BB17H
40BB17H Ball Bearing Idler Sprocket Hardened Teeth
Idler Ball Bearing
40BB18H
Ball Bearing Idler Sprocket Hardened Teeth
Idler Ball Bearing
50BB15H
Ball Bearing Idler Sprocket Hardened Teeth
Idler Ball Bearing
50BB17H
Ball Bearing Idler Sprocket Hardened Teeth
No. Teeth N/A 20 N/A 17 N/A 18 N/A 15 N/A 17
Chain Size N/A 35 N/A 40 N/A 40 N/A 50 N/A 50
O.D. N/A 2.600 in N/A 2.970 in N/A 3.140 in N/A 3.320 in N/A 3.720 in
B N/A 0.638 in
L N/A 0.720 in
W N/A 0.168 in N/A 0.284 in N/A 0.284 in N/A 0.343 in N/A 0.343 in