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 9.840 in250.00 mm |
Bore Range - Min. |
N/A 6.880 in175.00 mm |
Torque Capacity |
N/A 108000 lb·ft147000 N·m |
Inner Race Max. Overrunning Speed |
N/A 135 rpm |
Drag Torque |
N/A 68.540 lb·ft93.00 N·m |
A - Backstop width |
N/A 9.720 in247.00 mm |
B - Overall length |
N/A 23.620 in600.00 mm |
C - Inside width |
N/A 9.020 in229.00 mm |
D - Center line of backstop to flange edge |
N/A 15.160 in385.00 mm |
E - Counterbore inside diameter |
N/A 11.810 in300.00 mm |
F - Overall inner race width |
N/A 10.710 in272.00 mm |
G - Counterbore depth |
N/A 0.850 in21.50 mm |
H - Overall backstop width |
N/A 11.140 in283.00 mm |
J - Distance from backstop center line to I-beam edge |
N/A 82.010 in2083.00 mm |
K - Torque arm height |
N/A 12.010 in305.00 mm |
L - Torque arm width |
N/A 5.000 in127.00 mm |
Amount of grease |
N/A 3.080 lb1.400 kg |
Weight - With Torque Arm - Min. Bore |
N/A 1522.400 lb692.000 kg |
Weight - With Torque Arm - Max. Bore |
N/A 1397.000 lb635.000 kg |
Weight - Without Torque Arm - Min. Bore |
N/A 1223.200 lb556.000 kg |
Weight - Without Torque Arm - Max.. Bore |
N/A 1097.800 lb499.000 kg |