Tsubaki’s new BS-F Series backstops are designed for simple, drop-in installation to all major competitive external, low-speed backstop products. These backstops use a unique labyrinth seal design for maximum life with minimal maintenance. With Tsubaki’s innovative design features, our backstops ensure efficient and dependable operation in the harshest environments.
TYPICAL APPLICATIONS
COMMON INDUSTRIES
MINING
POWER GENERATING PLANTS
CEMENT
PORTS
INNOVATIVE FEATURES:
NON-ROLLOVER CAM
SPECIAL LABYRINTH SEAL
Superior Performance in the Harshest Environments
GREASE LUBRICATION
DROP IN DESIGN
3 STEP
EASY CONNECTION
Step 1: Insert I-beam torque arm into clutch
Step 2: Insert lock pins through flange plate and secure torque arm
Step 3: Insert retaining pins into lock pins 
Bore Range - Max. |
N/A 4.530 in115.00 mm |
Bore Range - Min. |
N/A 3.150 in80.00 mm |
Torque Capacity |
N/A 12000 lb·ft16300 N·m |
Inner Race Max. Overrunning Speed |
N/A 300 rpm |
Drag Torque |
N/A 11.050 lb·ft15.00 N·m |
A - Backstop width |
N/A 5.000 in127.00 mm |
B - Overall length |
N/A 10.630 in270.00 mm |
C - Inside width |
N/A 5.000 in127.00 mm |
D - Center line of backstop to flange edge |
N/A 7.130 in181.00 mm |
E - Counterbore inside diameter |
N/A 5.590 in142.00 mm |
F - Overall inner race width |
N/A 5.310 in135.00 mm |
G - Counterbore depth |
N/A 0.160 in4.00 mm |
H - Overall backstop width |
N/A 5.870 in149.00 mm |
J - Distance from backstop center line to I-beam edge |
N/A 50.000 in1270.00 mm |
K - Torque arm height |
N/A 4.020 in102.00 mm |
L - Torque arm width |
N/A 2.800 in71.00 mm |
Amount of grease |
N/A 0.230 lb0.105 kg |
Weight - With Torque Arm - Min. Bore |
N/A 180.400 lb82.000 kg |
Weight - With Torque Arm - Max. Bore |
N/A 167.200 lb76.000 kg |
Weight - Without Torque Arm - Min. Bore |
N/A 129.800 lb59.000 kg |
Weight - Without Torque Arm - Max.. Bore |
N/A 116.600 lb53.000 kg |