Item # BS425F, BS - 425 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 16.730 in425.00 mm
Bore Range - Min.	N/A 12.790 in325.00 mm
Torque Capacity	N/A 542000 lb·ft735000 N·m
Inner Race Max. Overrunning Speed	N/A 85 rpm
Drag Torque	N/A 159.190 lb·ft216.00 N·m
A - Backstop width	N/A 14.960 in380.00 mm
B - Overall length	N/A 40.550 in1030.00 mm
C - Inside width	N/A 15.590 in396.00 mm
D - Center line of backstop to flange edge	N/A 25.390 in645.00 mm
E - Counterbore inside diameter	N/A 23.620 in600.00 mm
F - Overall inner race width	N/A 15.910 in404.00 mm
G - Counterbore depth	N/A 0.160 in4.00 mm
H - Overall backstop width	N/A 17.050 in433.00 mm
J - Distance from backstop center line to I-beam edge	N/A 107.990 in2743.00 mm
K - Torque arm height	N/A 20.000 in508.00 mm
L - Torque arm width	N/A 6.380 in162.00 mm
Amount of grease	N/A 7.700 lb3.500 kg
Weight - With Torque Arm - Min. Bore	N/A 6776.000 lb3080.000 kg
Weight - With Torque Arm - Max. Bore	N/A 6358.000 lb2890.000 kg
Weight - Without Torque Arm - Min. Bore	N/A 5742.000 lb2610.000 kg
Weight - Without Torque Arm - Max.. Bore	N/A 5324.000 lb2420.000 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