Thruster Drum Brake
Johnson Thruster Drum Brakes are spring-set, 3-phase thruster-released drum brakes, available in metric (DIN standard, DL codes) and imperial (AISE standard, SMLB/SMLA codes) dimensions, plus SMLB-EMA electro/mechanical actuator variants. Fabricated steel mechanism with non-ferrous bushed pivots, ground stainless steel pins, and high-temperature non-asbestos friction linings.
Thrusters: Available with Elhy EB (preferred), Eldro ED, or Johnson EJ thrusters, IP56 enclosed. JDL and SMLB models are standard-fitted with Johnson EJ thrusters.
Options: Self-adjusting mechanism, mechanical release lever, limit switches to monitor release/set/wear, hydraulic override by remote pedal, electronic modulated torque by remote pedal, and reverse brake mechanism (thruster to apply) for soft stop or soft set.
Applications: Mechanical handling equipment, cranes, winches, stacker reclaimers, ski lifts, and conveyors.
DL Series — Metric (DIN)
Drum Diameter Range: 160–710 mm
Braking Torque Range: 79–10,700 Nm (depending on thruster)
Drum Diameter: 160 mm / 6 in
Max Dynamic Torque: 79–131 Nm (depending on thruster)
Weight: 27–29 kg
Thruster Rating: Elhy EB120 / EB220, IP56
Thruster Power: 0.25–0.26 kW
Full dimensional drawings available on request.
Drum Diameter: 200 mm / 8 in
Max Dynamic Torque: 127–344 Nm (depending on thruster)
Weight: 31–33 kg
Thruster Rating: Elhy EB120 / EB220 / EB300, IP56
Thruster Power: 0.20–0.26 kW
Full dimensional drawings available on request.
Drum Diameter: 250 mm / 10 in
Max Dynamic Torque: 285–680 Nm (depending on thruster)
Weight: 39–43 kg
Thruster Rating: Elhy EB220 / EB300 / EB50, IP56
Thruster Power: 0.20–0.26 kW
Full dimensional drawings available on request.
Drum Diameter: 315 mm / 12 in
Max Dynamic Torque: 505–1,235 Nm (depending on thruster)
Weight: 80–90 kg
Thruster Rating: Elhy EB300 / EB50 / EB80, IP56
Thruster Power: 0.20–0.33 kW
Full dimensional drawings available on request.
Drum Diameter: 400 mm / 16 in
Max Dynamic Torque: 1,080–2,860 Nm (depending on thruster)
Weight: 112–118 kg
Thruster Rating: Elhy EB50 / EB80 / EB125, IP56
Thruster Power: 0.26–0.40 kW
Full dimensional drawings available on request.
Drum Diameter: 500 mm / 20 in
Max Dynamic Torque: 3,380–6,000 Nm (depending on thruster)
Weight: 180–210 kg
Thruster Rating: Elhy EB125 / EB150 / EB250, IP56
Thruster Power: 0.40–0.46 kW
Full dimensional drawings available on request.
Drum Diameter: 630 mm / 24 in
Max Dynamic Torque: 3,700–7,150 Nm (depending on thruster)
Weight: 280–292 kg
Thruster Rating: Elhy EB125 / EB150 / EB250, IP56
Thruster Power: 0.40–0.46 kW
Full dimensional drawings available on request.
Drum Diameter: 710 mm
Max Dynamic Torque: 7,750–10,700 Nm (depending on thruster)
Weight: 400–406 kg
Thruster Rating: Elhy EB250 / EB3000 (DIN series), IP56
Thruster Power: 0.46–0.50 kW
Full dimensional drawings available on request.
JDL Series — Metric (DIN)
Drum Diameter: 400 mm / 16 in
Braking Torque: 860–2,670 Nm (by thruster)
Drum Diameter: 400 mm / 16 in
Max Dynamic Torque: 860 / 1,620 / 2,670 Nm for EJ050/6 / EJ080/6 / EJ121/6
Weight: 105 / 106 / 123 kg
Thruster Rating: Johnson EJ050/6, EJ080/6, EJ121/6, IP56
Thruster Power: 0.21 / 0.32 / 0.32 kW (0.5 / 1.2 / 1.2 A)
Full dimensional drawings available on request.
SMLB Series — Imperial (AISE)
Drum Diameter: 16 in / 406 mm
Braking Torque: 630–1,960 lb-ft / 854–2,657 Nm
Drum Diameter: 16 in / 406 mm
Max Dynamic Torque: 630–1,960 lb-ft / 854–2,657 Nm (depending on thruster)
Weight: 240–280 lb / 109–127 kg
Thruster Rating: Johnson EJ, IP56
Thruster Options: EJ050/6, EJ080/6, EJ121/6
Full dimensional drawings available on request.
SMLA Series — Imperial (AISE)
Drum Diameter: 19 in / 483 mm
Braking Torque: 2,407–4,273 lb-ft (by thruster)
Drum Diameter: 19 in / 483 mm
Max Dynamic Torque: 2,407 / 2,457 / 4,273 lb-ft for EB125 / EB150 / EB250
Weight: 396 lb / 180 kg
Thruster Rating: Elhy EB125 / EB150 / EB250, IP56
Thruster Power: 0.33 / 0.40 / 0.46 kVA
Full dimensional drawings available on request.