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
>
TYPICAL APPLICATIONS
- Mining (Coal, Copper, Potash) - used in inclined conveyors and bucket elevators for transporting raw materials.
- Power Generating Plants - used in inclined conveyors to transfer coal from the stockpile to the boiler rooms.
- Cement Plants - used in bucket elevators and inclined conveyors for moving limestone and clay to crushers and silos.
COMMON INDUSTRIES
MINING
POWER GENERATING PLANTS
CEMENT
PORTS
INNOVATIVE FEATURES:
NON-ROLLOVER CAM
- Provides higher torque ratings than the leading competitors due to the larger profile and greater contact area.
- Improves performance and prevents costly and potentially dangerous rollover.

SPECIAL LABYRINTH SEAL
- New seal design prevents the ingress of dust and other contaminants typically found in mining and cement plants, which extends the life of the lubricant.
- Minimizes heat generation and provides trouble-free service with minimal scheduled maintenance.

Superior Performance in the Harshest Environments
GREASE LUBRICATION
- Offers synthetic grease lubrication in a sealed backstop design.
- Breather element is eliminated.
- No need to monitor oil levels, refill the backstop or worry about moisture in the lubricant.
- Provides trouble-free performance with minimized maintenance requirements.

DROP IN DESIGN
- Tsubaki offers the narrowest backstop with an I-beam torque arm.
- Quick and easy field replacement. Drop in compatible with most competitive products.

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

Item # |
Bore Range - Max. |
Bore Range - Min. |
Torque Capacity |
Inner Race Max. Overrunning Speed |
Drag Torque |
---|---|---|---|---|---|
BS85F | N/A 3.350 in85.00 mm | N/A 2.360 in60.00 mm | N/A 4980 lb·ft6760 N·m | N/A 300 rpm | N/A 6.000 lb·ft8.00 N·m |
BS95F | N/A 3.740 in95.00 mm | N/A 2.750 in70.00 mm | N/A 6590 lb·ft8940 N·m | N/A 300 rpm | N/A 7.370 lb·ft10.00 N·m |
BS115F | N/A 4.530 in115.00 mm | N/A 3.150 in80.00 mm | N/A 12000 lb·ft16300 N·m | N/A 300 rpm | N/A 11.050 lb·ft15.00 N·m |
BS140F | N/A 5.510 in140.00 mm | N/A 3.540 in90.00 mm | N/A 18000 lb·ft24400 N·m | N/A 300 rpm | N/A 14.740 lb·ft20.00 N·m |
BS165F | N/A 6.500 in165.00 mm | N/A 3.940 in100.00 mm | N/A 32500 lb·ft44100 N·m | N/A 300 rpm | N/A 25.060 lb·ft34.00 N·m |
BS200F | N/A 7.870 in200.00 mm | N/A 3.940 in100.00 mm | N/A 45500 lb·ft61700 N·m | N/A 180 rpm | N/A 32.430 lb·ft44.00 N·m |
BS225F | N/A 8.860 in225.00 mm | N/A 5.900 in150.00 mm | N/A 75200 lb·ft102000 N·m | N/A 150 rpm | N/A 54.540 lb·ft74.00 N·m |
BS250F | N/A 9.840 in250.00 mm | N/A 6.880 in175.00 mm | N/A 108000 lb·ft147000 N·m | N/A 135 rpm | N/A 68.540 lb·ft93.00 N·m |
BS270F | N/A 10.630 in270.00 mm | N/A 7.870 in200.00 mm | N/A 141000 lb·ft192000 N·m | N/A 125 rpm | N/A 72.220 lb·ft98.00 N·m |
BS300F | N/A 11.810 in300.00 mm | N/A 9.050 in230.00 mm | N/A 254000 lb·ft345000 N·m | N/A 115 rpm | N/A 79.600 lb·ft108.00 N·m |
BS360F | N/A 14.170 in360.00 mm | N/A 9.840 in250.00 mm | N/A 360000 lb·ft489000 N·m | N/A 100 rpm | N/A 115.710 lb·ft157.00 N·m |
BS425F | N/A 16.730 in425.00 mm | N/A 12.790 in325.00 mm | N/A 542000 lb·ft735000 N·m | N/A 85 rpm | N/A 159.190 lb·ft216.00 N·m |
BS465F | N/A 18.310 in465.00 mm | N/A 13.780 in350.00 mm | N/A 722000 lb·ft980000 N·m | N/A 80 rpm | N/A 180.560 lb·ft245.00 N·m |