U.S. Tsubaki RS25 bushed chain is the smallest ANSI roller chain. It is ideal for power transmission in business machines, electro-optical equipment, and precision and general industrial machines where relatively large space is allowed for miniature drives.
These chains can accommodate a large allowable load and are widely used for driving motorcycle cam shafts and power transmission machinery in general.
Request Information
Unit of Measure
Items
RS25 through RS240 Chains

RS25 Roller Chains
RS25 through RS240 Chains

RS25 Roller Chains
RS25.BF25H Chains

RS25.BF25H Chains
Chain Type 1 N/A Rollerless N/A Rollerless N/A
ANSI No. N/A 25 N/A 25 N/A
Chain Pitch_SYN N/A 0.250 in
Roller Diameter_SYN N/A 0.130 in
Inside Width_SYN2 N/A 0.125 in
Link Plate Thickness_SYN N/A 0.030 in N/A 0.030 in N/A 0.039 in
t - Link Plate N/A 0.030 in
Link Plate Height_SYN N/A 0.230 in
h - Link Plate N/A 0.199 in N/A 0.199 in N/A 0.230 in
Pin Diameter_SYN N/A 0.090 in
Number of Strands_SYN N/A 1 N/A 2 N/A 1
Pin Overall Length_SYN N/A 0.339 in N/A 0.591 in N/A 0.362 in
L1 N/A 0.150 in N/A 0.276 in N/A 0.161 in
L2 N/A 0.189 in N/A 0.315 in N/A 0.201 in
C - Transverse Pitch N/A 0.252 in N/A 0.252 in N/A
Chain Construction_SYN N/A Riveted
Min. Ultimate Strength ANSI Standard N/A 780 lb N/A 1560 lb N/A
Average Tensile Strength N/A 1050 lb N/A 2100 lb N/A 1320 lb
Number of Links per 10 ft N/A 480
Rated Working Load_SYN N/A 140 lb N/A 240 lb N/A 170 lb
  • 1 Single-strand chain. For multiple-strand chain, use larger tensioner.
  • 2 Width between roller link plates (W) is slightly narrower than ANSI standard, however this chain runs on standard sprockets.