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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
  • 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
Unit of Measure

Specifications

Bore Range - Max.

 N/A 3.350 in85.00 mm

Bore Range - Min.

 N/A 2.360 in60.00 mm

Torque Capacity

 N/A 4980 lb·ft6760 N·m

Inner Race Max. Overrunning Speed

 N/A 300 rpm

Drag Torque

 N/A 6.000 lb·ft8.00 N·m

A - Backstop width

 N/A 4.210 in107.00 mm

B - Overall length

 N/A 8.270 in210.00 mm

C - Inside width

 N/A 4.13 in105.00 mm

D - Center line of backstop to flange edge

 N/A 5.940 in151.00 mm

E - Counterbore inside diameter

 N/A 4.170 in106.00 mm

F - Overall inner race width

 N/A 4.720 in120.00 mm

G - Counterbore depth

 N/A 0.300 in7.50 mm

H - Overall backstop width

 N/A 5.000 in127.00 mm

J - Distance from backstop center line to I-beam edge

 N/A 32.010 in813.00 mm

K - Torque arm height

 N/A 2.990 in76.00 mm

L - Torque arm width

 N/A 2.520 in64.00 mm

Amount of grease

 N/A 0.140 lb0.065 kg

Weight - With Torque Arm - Min. Bore

 N/A 94.600 lb43.000 kg

Weight - With Torque Arm - Max. Bore

 N/A 88.000 lb40.000 kg

Weight - Without Torque Arm - Min. Bore

 N/A 68.200 lb31.000 kg

Weight - Without Torque Arm - Max.. Bore

 N/A 61.600 lb28.000 kg