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 3.740 in95.00 mm |
Bore Range - Min. |
N/A 2.750 in70.00 mm |
Torque Capacity |
N/A 6590 lb·ft8940 N·m |
Inner Race Max. Overrunning Speed |
N/A 300 rpm |
Drag Torque |
N/A 7.370 lb·ft10.00 N·m |
A - Backstop width |
N/A 4.210 in107.00 mm |
B - Overall length |
N/A 9.060 in230.00 mm |
C - Inside width |
N/A 4.410 in112.00 mm |
D - Center line of backstop to flange edge |
N/A 6.340 in161.00 mm |
E - Counterbore inside diameter |
N/A 4.720 in120.00 mm |
F - Overall inner race width |
N/A 4.720 in120.00 mm |
G - Counterbore depth |
N/A 0.160 in4.00 mm |
H - Overall backstop width |
N/A 5.000 in127.00 mm |
J - Distance from backstop center line to I-beam edge |
N/A 35.980 in914.00 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 0.170 lb0.075 kg |
Weight - With Torque Arm - Min. Bore |
N/A 114.400 lb52.000 kg |
Weight - With Torque Arm - Max. Bore |
N/A 105.600 lb48.000 kg |
Weight - Without Torque Arm - Min. Bore |
N/A 81.400 lb37.000 kg |
Weight - Without Torque Arm - Max.. Bore |
N/A 74.800 lb34.000 kg |