Item # BS85F, BS - 85 mm Bore Backstop On Tsubaki of Canada Limited

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

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

less

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

Specifications

Bore Range - Max.

Bore Range - Min.

Torque Capacity

Inner Race Max. Overrunning Speed

Drag Torque

A - Backstop width

B - Overall length

C - Inside width

D - Center line of backstop to flange edge

E - Counterbore inside diameter

F - Overall inner race width

G - Counterbore depth

H - Overall backstop width

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

K - Torque arm height

L - Torque arm width

Amount of grease

Weight - With Torque Arm - Min. Bore

Weight - With Torque Arm - Max. Bore

Weight - Without Torque Arm - Min. Bore

Weight - Without Torque Arm - Max.. Bore