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WPT® Low Inertia Brakes (LIB) are well suited for high cycle and tension control applications, such as steel shears and unwind stands. The LIB utilize a ventilated design to optimize the airflow in and out of the brake. This increased airflow allows the brake to run cooler in high cycle applications. WPT®'s Low Inertia Brakes are available in 1, 2, or 3 plate configurations with sizes ranging from 6 through 60 inches.
Unit of Measure

Specifications

Brands

 N/A WPT®
Static Torque Rating at 100 Pound per Square Inch (psi) (7 bar) Pressure1 N/A 7480 lbf·in845 N·m

Maximum Speed Hub and Center Plate (CP)

 N/A 4300 rpm

Maximum Slip Speed

 N/A 2870 rpm

Lining Area

 N/A 55 in²360 cm²
Minimum Bore Range2 N/A 0.94 in23.9 mm
Maximum Bore Range3 N/A 2.50 in63.5 mm

Weight and Inertia

Total Weight

 N/A 56 lb25 kg

Hub and Center Plate (CP) Weight

 N/A 9.3 lb4.2 kg

Hub and Center Plate (CP) Inertia

 N/A 0.46 lb·ft²0.019 kg·m²

Dimensions

Dimension - A

 N/A 12.125 in307.98 mm

Dimension - A Tolerance

 N/A +0.000 in-0.003 in+0.00 mm-0.08 mm

Hole Circle (B)

 N/A 11.13 in282.7 mm

Diameter (B)

 N/A 17/32 in

Quantity

 N/A 6

Dimension - C

 N/A 8.375 in212.80 mm

Dimension - C Tolerance

 N/A +0.000 in-0.003 in+0.00 mm-0.08 mm

Dimension - A (Metric Mounting)

 N/A 310.00 mm

Dimension - A Tolerance (Metric Mounting)

 N/A +0.00 mm-0.08 mm

Hole Circle (B) (Metric Mounting)

 N/A 280.0 mm

Diameter (B) (Metric Mounting)

 N/A 14.0 mm

Quantity (Metric Mounting)

 N/A 6

Dimension - C (Metric Mounting - H7)

 N/A 220.00 mm

Dimension - D

 N/A 11-1/8 in282.6 mm

Dimension - E (Ventilated Center Plate)

 N/A 4-9/16 in44.5 mm

Dimension - E (Ductile Slotted Center Plate)

 N/A 5-7/8 in149 mm

Features

Features

 N/A
  • Predictable preventative maintenance
  • Available in hydraulic or pneumatic actuation
  • Solid, slotted, or ventilated center plate options
  • Available with Full Marine Corrosion Protection package
  • Compatible with the Power Performance LI upgrade
  • High cycle life

Note

Note

 N/A Consult WPT® Application Engineering for application assistance, service factors, specifications, and detailed drawings/3D models.
  • 1 Dynamic (slipping) torque is 75% of the static torque.
  • 2 Contact WPT® for larger bore sizes. Listed bore sizes are for square key.
  • 3 Contact WPT® for larger bore sizes. Listed bore sizes are for square key.