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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 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