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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.
Low Inertia High Torque Clutches
Unit of Measure
Items Low Inertia High Torque Clutches
111-LIH
25000 Pound Force Inch (lbf.in) Static Torque Low Inertia High Torque Clutch 		Low Inertia High Torque Clutches
211-LIH
50000 Pound Force Inch (lbf.in) Static Torque Low Inertia High Torque Clutch 		Low Inertia High Torque Clutches
311-LIH
75000 Pound Force Inch (lbf.in) Static Torque Low Inertia High Torque Clutch 		Low Inertia High Torque Clutches
114-LIH
49800 Pound Force Inch (lbf.in) Static Torque Low Inertia High Torque Clutch 		Low Inertia High Torque Clutches
214-LIH
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.