Wheel Clamps & Brakes

Applications: Rail & Metro, Ports, Steel Mills, Mining

Johnson Wheel Clamps and Wheel Brakes act directly on the wheel side flanges of rail-mounted equipment. They can be fail-safe, spring applied, or pressure applied.

Wheel clamps are intended for emergency stopping and holding, and have hardened serrated shoes. Wheel brakes are similar to caliper brakes and are used for dynamic stopping and holding — a toggle linkage compensates for lining wear to provide constant braking force.

WC Series

Holding Force (Serrated Shoes): 5000 lb / 22240 N

Holding Force (Smooth Shoes): 1700 lb / 7562 N

Air Pressure (Release): 53 psi / 370 kPa

Air Pressure (Hold-off): 47 psi / 325 kPa

Hydraulic Pressure (Release): 640 psi / 4410 kPa

Hydraulic Pressure (Hold-off): 570 psi / 3930 kPa

Weight: 130 lb / 59 kg

Holding Force (Serrated Shoes): 7500 lb / 33600 N

Holding Force (Smooth Shoes): 2500 lb / 11120 N

Air Pressure (Release): 68 psi / 470 kPa

Air Pressure (Hold-off): 62 psi / 430 kPa

Hydraulic Pressure (Release): 820 psi / 5650 kPa

Hydraulic Pressure (Hold-off): 750 psi / 5170 kPa

Weight: 138 lb / 63 kg

Holding Force (Serrated Shoes): 10000 lb / 44480 N

Holding Force (Smooth Shoes): 3400 lb / 15120 N

Air Pressure (Release): 86 psi / 595 kPa

Air Pressure (Hold-off): 80 psi / 550 kPa

Hydraulic Pressure (Release): 800 psi / 5510 kPa

Hydraulic Pressure (Hold-off): 725 psi / 5000 kPa

Weight: 175 lb / 80 kg

Holding Force (Serrated Shoes): 15000 lb / 66720 N

Holding Force (Smooth Shoes): 5000 lb / 22240 N

Air Pressure (Release): 98 psi / 675 kPa

Air Pressure (Hold-off): 92 psi / 640 kPa

Hydraulic Pressure (Release): 1185 psi / 8160 kPa

Hydraulic Pressure (Hold-off): 1110 psi / 7650 kPa

Weight: 190 lb / 86 kg

WCL Series

Holding Force: 25,000 lb / 112,000 N

Actuation: Spring-set, hydraulic release

Min Release Pressure: 82 bar (1200 psi)

Max Working Pressure: 136 bar (2000 psi)

WLB Series

Actuation: Spring-set, hydraulic pressure released (varying spring force compensated for by toggle linkage)

Mounting: Flange Mounted

BD (Dynamic Brake Force @ Friction Pads): 12,500 lb (55,600 N)

BS (Static Brake Force @ Friction Pads): 10,000 lb (44,500 N)

Dynamic Brake Force at Rail: FD = (BD / 2) × (Wheel Face O.D. + I.D.) / Tread Diameter, lb (N)

Static Brake Force at Rail: FS = (BS / 2) × (Wheel Face O.D. + I.D.) / Tread Diameter, lb (N)

Release Pressure: 1300 psi (90 bar)

Hold-off Pressure: 1200 psi (82 bar)

Max Working Pressure: 2000 psi (136 bar)