U.S. Tsubaki Inc. - RS25.BF25H Chains

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.

Unit of Measure

Items	25RB RS25 Roller Chains	25-2RB RS25 Roller Chains	BF25HRB RS25.BF25H Chains
Chain Type	N/A Rollerless	N/A Rollerless	N/A
ANSI No.	N/A 25	N/A 25	N/A
P - Pitch	N/A 0.250 in
B - Bushing Diameter	N/A 0.130 in
W - Width Between Roller Link Plates	N/A 0.125 in
T	N/A 0.030 in	N/A 0.030 in	N/A 0.039 in
t	N/A 0.030 in
H	N/A 0.230 in
h	N/A 0.199 in	N/A 0.199 in	N/A 0.230 in
D	N/A 0.090 in
Number of Strands	N/A 1	N/A 2	N/A 1
L1+L2	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
Standard Type of Pin	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
Maximum Allowable Load	N/A 140 lb	N/A 240 lb	N/A 170 lb