Model: H491DQR

491 series, hydraulic double acting caliper disc brake with spring retractable pistons. Sized for 1-1/8 inch thick brake disc.

  • Spring Retractable Pistons
  • Aluminum Construction
  • Hardcoated
  • Fits on Brake Discs with Unlimited Diameter
  • Replaceable Friction Pads (WCB p/n 4251-1030)
  • Internal Crossover Porting
  • Dynamic torque (inch/lb): 353.5 lbf per 100 psi x braking radius
  • Power Factor: 491 Series 5X, 38 Series 1X, 47 Series 2X, 200 Series 4X, 962 Series 10X


Model # H491DQR
Description Double Acting, Fixed Mount. Use Fixed or Floating Disc
Additional Info Dual Retractable Pistons
Disc Thick. (in.) 1-1/8
Fluid Displacement 0.147 cu. in.
Fluid Type Hydraulic Oil
Max. Pressure, PSI 1500
Piston Dia. 2.5 in.
Seals Buna-N
Total Pad Area 9.14 sq. in.
Wearable Friction Material 3.80 cu. in.
Click image to enlarge


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