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U.S. Tsubaki Curved chain has additional clearance between the pins and bushings and between the roller links and pin link plates to permit extra flexibility and greater lateral displacement. The basic dimensions of this chain are the same as those of ASME/ANSI standard roller chain.

U.S. Tsubaki's unique design of the curved chain does not taper the pin diameter, which allows the pin diameter to be uniform throughout.
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Item #

ANSI No.

Attachment Number

Pitch

N

S

X

C

RS35CU A-1 N/A 35 N/A A-1 N/A 0.375 in N/A 0.311 in N/A 0.250 in N/A 0.571 in N/A 0.375 in
RS40CU A-1 N/A 40 N/A A-1 N/A 0.500 in N/A 0.374 in N/A 0.315 in N/A 0.709 in N/A 0.500 in
RS50CU A-1 N/A 50 N/A A-1 N/A 0.625 in N/A 0.500 in N/A 0.406 in N/A 0.933 in N/A 0.626 in
RS60CU A-1 N/A 60 N/A A-1 N/A 0.750 in N/A 0.625 in N/A 0.469 in N/A 1.122 in N/A 0.750 in
RS80CU A-1 N/A 80 N/A A-1 N/A 1.000 in N/A 0.752 in N/A 0.626 in N/A 1.461 in N/A 1.000 in
RS35CU K-1 N/A 35 N/A K-1 N/A 0.375 in N/A 0.311 in N/A 0.250 in N/A 0.571 in N/A 0.375 in
RS40CU K-1 N/A 40 N/A K-1 N/A 0.500 in N/A 0.374 in N/A 0.315 in N/A 0.709 in N/A 0.500 in
RS50CU K-1 N/A 50 N/A K-1 N/A 0.625 in N/A 0.500 in N/A 0.406 in N/A 0.933 in N/A 0.626 in
RS60CU K-1 N/A 60 N/A K-1 N/A 0.750 in N/A 0.625 in N/A 0.469 in N/A 1.122 in N/A 0.750 in
RS80CU K-1 N/A 80 N/A K-1 N/A 1.000 in N/A 0.752 in N/A 0.626 in N/A 1.461 in N/A 1.000 in
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