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WPT® Low Inertia (LI) High Torque Clutches provide the highest torque-to-size ratio of any WPT® Low Inertia product. WPT®'s LI High Torque features a "pancake" airtube which provides maximum actuator contact area increasing the clutch torque capacity. A large air connection is mounted directly to the airtube allowing for rapid clutch response time. WPT®’s Low Inertia High Torque Clutches are available in 1, 2 or 3 plate configurations with diameters ranging from 11 through 36 inches.
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Low Inertia High Torque Clutches

25000 Pound Force Inch (lbf.in) Static Torque Low Inertia High Torque Clutch
Low Inertia High Torque Clutches

50000 Pound Force Inch (lbf.in) Static Torque Low Inertia High Torque Clutch
Low Inertia High Torque Clutches

75000 Pound Force Inch (lbf.in) Static Torque Low Inertia High Torque Clutch
Low Inertia High Torque Clutches

49800 Pound Force Inch (lbf.in) Static Torque Low Inertia High Torque Clutch
Low Inertia High Torque Clutches

99600 Pound Force Inch (lbf.in) Static Torque Low Inertia High Torque Clutch
Description N/A WPT® Low Inertia (LI) High Torque Clutches provide the highest torque-to-size ratio of any WPT® Low Inertia product. WPT®'s LI High Torque features a "pancake" airtube which provides maximum actuator contact area increasing the clutch torque capacity. A large air connection is mounted directly to the airtube allowing for rapid clutch response time. WPT®’s Low Inertia High Torque Clutches are available in 1, 2 or 3 plate configurations with diameters ranging from 11 through 36 inches.
Brands N/A WPT®
Static Torque at 100 Pounds per Square Inch (psi) (7 Bar) Pressure1 N/A 25000 lbf·in2820 N·m N/A 50000 lbf·in5650 N·m N/A 75000 lbf·in8470 N·m N/A 49800 lbf·in5630 N·m N/A 99600 lbf·in11300 N·m
Maximum Speed Complete Clutch N/A 2150 rpm N/A 2150 rpm N/A 2150 rpm N/A 1830 rpm N/A 1830 rpm
Maximum Speed Hub/Center Plates Only N/A 3130 rpm N/A 3130 rpm N/A 3130 rpm N/A 2460 rpm N/A 2460 rpm
Maximum Slip Speed N/A 2090 rpm N/A 2090 rpm N/A 2090 rpm N/A 1640 rpm N/A 1640 rpm
Total Weight N/A 130 lb58 kg N/A 200 lb91 kg N/A 330 lb150 kg N/A 180 lb82 kg N/A 280 lb130 kg
Total Inertia N/A 24 lb·ft²1.0 kg·m² N/A 37 lb·ft²1.5 kg·m² N/A 36 lb·ft²1.5 kg·m² N/A 58 lb·ft²2.4 kg·m² N/A 80 lb·ft²3.4 kg·m²
Hub and Center Plate Weight N/A 18 lb8.0 kg N/A 51 lb23 kg N/A 75 lb34 kg N/A 41 lb19 kg N/A 82 lb37 kg
Hub and Center Plate Inertia N/A 1.2 lb·ft²0.051 kg·m² N/A 4.5 lb·ft²0.19 kg·m² N/A 6.7 lb·ft²0.28 kg·m² N/A 5.5 lb·ft²0.23 kg·m² N/A 11 lb·ft²0.50 kg·m²
Lining Area N/A 110 in²730 cm² N/A 230 in²1500 cm² N/A 340 in²2200 cm² N/A 170 in²1100 cm² N/A 330 in²2100 cm²
Minimum Bore Range2 N/A 1.25 in31.8 mm N/A 1.25 in31.8 mm N/A 1.25 in31.8 mm N/A 1.50 in38.1 mm N/A 1.88 in47.8 mm
Maximum Bore Range3 N/A 2.80 in71.1 mm N/A 2.80 in71.1 mm N/A 2.80 in71.1 mm N/A 3.30 in83.8 mm N/A 3.90 in99.0 mm
Dimension - A (Imperial Mounting) N/A 16.000 in406.40 mm N/A 16.000 in406.40 mm N/A 16.000 in406.40 mm N/A 18.750 in476.25 mm N/A 18.750 in476.25 mm
Dimension - A Tolerance (Imperial Mounting) N/A +0.000 in-0.003 in+0.00 mm-0.08 mm
Dimension (B) Hole Circle (Imperial Mounting) N/A 14.75 in374.7 mm N/A 14.75 in374.7 mm N/A 14.75 in374.7 mm N/A 17.50 in444.5 mm N/A 17.50 in444.5 mm
Dimension (B) Diameter (Imperial Mounting) N/A 21/32 in
Quantity (Imperial Mounting) N/A 6 N/A 6 N/A 6 N/A 8 N/A 8
Dimension - C (Imperial Mounting) N/A 11.375 in289.00 mm N/A 11.375 in289.00 mm N/A 11.375 in289.00 mm N/A 14.375 in365.20 mm N/A 14.375 in365.20 mm
Dimension - C Tolerance (Imperial Mounting) N/A +0.003 in-0.000 in+0.08 mm-0.00 mm
Dimension - A (Metric Mounting) N/A 406.40 mm N/A 406.40 mm N/A 406.40 mm N/A 470.00 mm N/A 470.00 mm
Dimension - A Tolerance (Metric Mounting) N/A +0.00 in-0.08 in
Dimension (B) Hole Circle (Metric Mounting) N/A 374.7 mm N/A 374.7 mm N/A 374.7 mm N/A 445.0 mm N/A 445.0 mm
Dimension (B) Diameter (Metric Mounting) N/A 18.0 mm
Quantity (Metric Mounting) N/A 6 N/A 6 N/A 6 N/A 8 N/A 8
Dimension (C) H7 (Metric Mounting) N/A 295.00 mm N/A 295.00 mm N/A 295.00 mm N/A 370.00 mm N/A 370.00 mm
Dimension - D N/A 14-3/4 in374.7 mm N/A 14-3/4 in374.7 mm N/A 14-3/4 in374.7 mm N/A 17-1/2 in444.5 mm N/A 17-1/2 in444.5 mm
Dimension -E (Ventilated Center Plate) N/A 7-15/16 in202 mm N/A 9-11/16 in246 mm N/A 11-7/16 in291 mm N/A 8-3/8 in213 mm N/A 10-1/4 in260 mm
Dimension - E (Ductile Slotted Center Plate) N/A 7-15/16 in202 mm N/A 9-11/16 in246 mm N/A 11-7/16 in291 mm N/A 7-7/8 in200 mm N/A 9-1/4 in235 mm
Features N/A
  • Hydraulic actuation available
  • High cycle life
  • Predictable preventative maintenance
  • Single-point actuator connection
  • End-of-shaft mounting
  • Slotted solid and ventilated center plates available
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.