Brakes


Direct Acting Spring Disc Brakes
  Applications include:
    Hoist and Conveyor systems

Self contained actuators
Individual actuators are field replaceable, provide brake force adjustment, and include spring caging feature


    Model: DS1050D
    Opposing Piston,
    floating assembly
    dual actuators
    auto-centering
    mechanism




    DS Brake Features include:

  •  Spring set, hydraulic pressure release
  •  Self-contained removable actuators
  •  Many spring stack options
  •  Stroke / wear adjustment
  •  Spring caging feature
  •  Hydraulic pressure isolated from disc
  •  Actuator manual release / retraction
  •  Fixed assemblies with opposing actuators
  •  Floating assemblies with low friction float bearings
  •  Floating assemblies with single or opposing actuators
  •  Narrow profile with actuators on one side
  •  Single and multiple actuator assemblies
  •  Optional bases for fixed and floating assemblies
  •  Optional release and wear proximity - switches
  •  Flow through actuators - better oil filtering

Model:  DS3040A
Base style 'A'

Model:  DS3040B
Base style 'B'

Model:  DS2040C
Base style 'C'


MODEL        Swept Face "F" 
in(mm)		 MIN. DISC DIA. "D"
in(mm)		 MIN. Dynamic TORQUE
Lb.ft(Nm)		 APPLIED FORCE
lb(n)
DS1025-08   8 (200) 30 (762) 27000 (36700) 59200(263300)
DS2025-08   8 (200) 40 (1016) 79000 (107500) 119000(529000)
DS3025-08   8 (200) 60 (1524) 192800 (261400) 178000(792000)
DS1040-09   9 (229) 35 (889) 45500 (61600) 84000(373000)
DS2040-09   9 (229) 50 (1270) 142600 (193400) 167000(743000)
DS3040-09   9 (229) 70 (1778) 318900 (432400) 251000(1117000)
DS1050-10   10 (254) 40 (1016) 64300 (87200) 103000(458000)
DS2050-10   10 (254) 55 (1397) 192100 (260500) 205000(912000)
DS3070-10   10 (254) 80 (2032) 449100 (608900) 308000(1370000)
DS1070-12   12 (305) 50 (1270) 113200 (153400) 143000(636000)
DS2070-12   12 (305) 70 (1778) 346700 (470100) 287000(1277000)
DS3070-12   12 (305) 100 (2540) 788300 (1068800) 430000(1913000)




Direct Acting Brake Caliper Selection
The brake size must be chosen to give required braking torque and to dissipate the energy during stopping without over heating the disc. Brake torque is often related to drive motor torque by an arbitrary service factor typically 75% -100% full load torque for crane travel and similar inertial loads which tend to be self stopping or 150% -200% for crane hoists and other overhauling loads. If a precise stop time or distance is specified, then the brake torque must be calculated.

Motor Full Load Torque is given by:
MFLT = [(kW x 9550) / rpm]Nm or [(HP x 5250) / rpm]Lbft

Calculate stopping torque based on the diameter of your disc, use the following table and equations:

Imperial Torque
Dynamic Torque = AF x 0.50 x (D - F) / 24
Static Torque = AF x 0.40 x (D - F) / 24

Metric Torque
Dynamic Torque = AF x 0.50 x (D - F) / 2000
Static Torque = AF x 0.40 x (D - F) / 2000

AF = Applied Force
D = Brake Disc Diameter
F = Swept Face is 8-12 inches [200-305 mm]

Western Canada office:  604 940 4555        Eastern Canada Office:  416 213 9991        England Office:  01278 456 411
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