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
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Unit of Measure
Items
BS-F Series BS85 - BS465 Backstop Cam Clutch

BS - 85 mm Bore Backstop
BS-F Series BS85 - BS465 Backstop Cam Clutch

BS - 95 mm Bore Backstop
BS-F Series BS85 - BS465 Backstop Cam Clutch

BS - 115 mm Bore Backstop
BS-F Series BS85 - BS465 Backstop Cam Clutch

BS - 140 mm Bore Backstop
BS-F Series BS85 - BS465 Backstop Cam Clutch

BS - 165 mm Bore Backstop
Bore Range - Max. N/A 3.350 in85.00 mm N/A 3.740 in95.00 mm N/A 4.530 in115.00 mm N/A 5.510 in140.00 mm N/A 6.500 in165.00 mm
Bore Range - Min. N/A 2.360 in60.00 mm N/A 2.750 in70.00 mm N/A 3.150 in80.00 mm N/A 3.540 in90.00 mm N/A 3.940 in100.00 mm
Torque Capacity N/A 4980 lb·ft6760 N·m N/A 6590 lb·ft8940 N·m N/A 12000 lb·ft16300 N·m N/A 18000 lb·ft24400 N·m N/A 32500 lb·ft44100 N·m
Inner Race Max. Overrunning Speed N/A 300 rpm
Drag Torque N/A 6.000 lb·ft8.00 N·m N/A 7.370 lb·ft10.00 N·m N/A 11.050 lb·ft15.00 N·m N/A 14.740 lb·ft20.00 N·m N/A 25.060 lb·ft34.00 N·m
A - Backstop width N/A 4.210 in107.00 mm N/A 4.210 in107.00 mm N/A 5.000 in127.00 mm N/A 5.000 in127.00 mm N/A 5.550 in141.00 mm
B - Overall length N/A 8.270 in210.00 mm N/A 9.060 in230.00 mm N/A 10.630 in270.00 mm N/A 12.600 in320.00 mm N/A 14.170 in360.00 mm
C - Inside width N/A 4.13 in105.00 mm N/A 4.410 in112.00 mm N/A 5.000 in127.00 mm N/A 5.280 in134.00 mm N/A 5.280 in134.00 mm
D - Center line of backstop to flange edge N/A 5.940 in151.00 mm N/A 6.340 in161.00 mm N/A 7.130 in181.00 mm N/A 8.170 in207.50 mm N/A 9.550 in242.50 mm
E - Counterbore inside diameter N/A 4.170 in106.00 mm N/A 4.720 in120.00 mm N/A 5.590 in142.00 mm N/A 6.690 in170.00 mm N/A 8.230 in209.00 mm
F - Overall inner race width N/A 4.720 in120.00 mm N/A 4.720 in120.00 mm N/A 5.310 in135.00 mm N/A 5.590 in142.00 mm N/A 5.590 in142.00 mm
G - Counterbore depth N/A 0.300 in7.50 mm N/A 0.160 in4.00 mm N/A 0.160 in4.00 mm N/A 0.160 in4.00 mm N/A 0.160 in4.00 mm
H - Overall backstop width N/A 5.000 in127.00 mm N/A 5.000 in127.00 mm N/A 5.870 in149.00 mm N/A 5.940 in151.00 mm N/A 6.650 in169.00 mm
J - Distance from backstop center line to I-beam edge N/A 32.010 in813.00 mm N/A 35.980 in914.00 mm N/A 50.000 in1270.00 mm N/A 55.980 in1422.00 mm N/A 65.980 in1676.00 mm
K - Torque arm height N/A 2.990 in76.00 mm N/A 4.020 in102.00 mm N/A 4.020 in102.00 mm N/A 5.000 in127.00 mm N/A 5.980 in152.00 mm
L - Torque arm width N/A 2.520 in64.00 mm N/A 2.800 in71.00 mm N/A 2.800 in71.00 mm N/A 2.990 in76.00 mm N/A 3.580 in91.00 mm
Amount of grease N/A 0.140 lb0.065 kg N/A 0.170 lb0.075 kg N/A 0.230 lb0.105 kg N/A 0.330 lb0.150 kg N/A 0.350 lb0.160 kg
Weight - With Torque Arm - Min. Bore N/A 94.600 lb43.000 kg N/A 114.400 lb52.000 kg N/A 180.400 lb82.000 kg N/A 250.800 lb114.000 kg N/A 382.800 lb174.000 kg
Weight - With Torque Arm - Max. Bore N/A 88.000 lb40.000 kg N/A 105.600 lb48.000 kg N/A 167.200 lb76.000 kg N/A 228.800 lb104.000 kg N/A 349.800 lb159.000 kg
Weight - Without Torque Arm - Min. Bore N/A 68.200 lb31.000 kg N/A 81.400 lb37.000 kg N/A 129.800 lb59.000 kg N/A 184.800 lb84.000 kg N/A 259.600 lb118.000 kg
Weight - Without Torque Arm - Max.. Bore N/A 61.600 lb28.000 kg N/A 74.800 lb34.000 kg N/A 116.600 lb53.000 kg N/A 162.800 lb74.000 kg N/A 226.600 lb103.000 kg