Low Inertia Spring-Set Brakes On WPT Power Corporation

WPT® Low Inertia Spring-Set (LISS) Brakes are a spring-applied / air-release design well suited for fail-safe applications. The LI Spring Set can also be used as a parking brake since no pressure is required to engage the brake. With adjustable spring release pressures, the LI Spring-Set can provide a range of torques that will suit many applications. WPT®'s Low Inertia Spring-Set Brakes are available in 1, 2, or 3 plate configurations with sizes ranging 6 through 60 inches.

Item #	Item Name	Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) (4.1 bar) Minimum Release Pressure	Static Torque Rating at 75 Pound Force per Square Inch (lbf/in²) (5.2 bar) Minimum Release Pressure	Static Torque Rating at 90 Pound Force per Square Inch (lbf/in²) (6.2 bar) Minimum Release Pressure	Maximum Speed Hub and Center Plate (CP)
106-LIS	N/A 284 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake	N/A 2510 lbf·in284 N·m	N/A 3130 lbf·in354 N·m	N/A 3760 lbf·in425 N·m	N/A 5280 rpm
206-LIS	N/A 567 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake	N/A 5020 lbf·in567 N·m	N/A 6270 lbf·in708 N·m	N/A 7520 lbf·in850 N·m	N/A 5280 rpm
108-LIS	N/A 467 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake	N/A 4130 lbf·in467 N·m	N/A 5170 lbf·in584 N·m	N/A 6200 lbf·in701 N·m	N/A 4290 rpm
208-LIS	N/A 858 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake	N/A 7590 lbf·in858 N·m	N/A 9480 lbf·in1070 N·m	N/A 11400 lbf·in1290 N·m	N/A 4290 rpm
111-LIS	N/A 1050 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake	N/A 9270 lbf·in1050 N·m	N/A 11600 lbf·in1310 N·m	N/A 13900 lbf·in1570 N·m	N/A 3120 rpm
211-LIS	N/A 1930 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake	N/A 17100 lbf·in1930 N·m	N/A 21400 lbf·in2420 N·m	N/A 25700 lbf·in2900 N·m	N/A 3120 rpm
311-LIS	N/A 2670 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake	N/A 23600 lbf·in2670 N·m	N/A 29500 lbf·in3330 N·m	N/A 35400 lbf·in4000 N·m	N/A 3120 rpm
114-LIS	N/A 1740 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake	N/A 15400 lbf·in1740 N·m	N/A 19300 lbf·in2180 N·m	N/A 23100 lbf·in2610 N·m	N/A 2450 rpm
214-LIS	N/A 3200 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake	N/A 28300 lbf·in3200 N·m	N/A 35400 lbf·in4000 N·m	N/A 42400 lbf·in4790 N·m	N/A 2450 rpm
314-LIS	N/A 4370 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake	N/A 38700 lbf·in4370 N·m	N/A 48400 lbf·in5470 N·m	N/A 58100 lbf·in6560 N·m	N/A 2450 rpm
116-LIS	N/A 2430 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake	N/A 21500 lbf·in2430 N·m	N/A 26800 lbf·in3030 N·m	N/A 32200 lbf·in3640 N·m	N/A 2140 rpm
216-LIS	N/A 4490 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake	N/A 39700 lbf·in4490 N·m	N/A 49600 lbf·in5600 N·m	N/A 59600 lbf·in6730 N·m	N/A 2140 rpm
316-LIS	N/A 6200 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake	N/A 54900 lbf·in6200 N·m	N/A 68600 lbf·in7750 N·m	N/A 82300 lbf·in9300 N·m	N/A 2140 rpm
118-LIS	N/A 4000 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake	N/A 35400 lbf·in4000 N·m	N/A 44200 lbf·in4990 N·m	N/A 53100 lbf·in6000 N·m	N/A 1900 rpm
218-LIS	N/A 7540 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake	N/A 66700 lbf·in7540 N·m	N/A 83400 lbf·in9420 N·m	N/A 100000 lbf·in11300 N·m	N/A 1900 rpm
318-LIS	N/A 10300 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake	N/A 91200 lbf·in10300 N·m	N/A 114000 lbf·in12900 N·m	N/A 137000 lbf·in15500 N·m	N/A 1900 rpm
121-LIS	N/A 5850 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake	N/A 51800 lbf·in5850 N·m	N/A 64800 lbf·in7320 N·m	N/A 77700 lbf·in8780 N·m	N/A 1630 rpm
221-LIS	N/A 10900 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake	N/A 96700 lbf·in10900 N·m	N/A 121000 lbf·in13700 N·m	N/A 145000 lbf·in16400 N·m	N/A 1630 rpm
321-LIS	N/A 15000 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake	N/A 133000 lbf·in15000 N·m	N/A 166000 lbf·in18800 N·m	N/A 199000 lbf·in22500 N·m	N/A 1630 rpm
124H-LIS	N/A 9620 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake	N/A 85100 lbf·in9620 N·m	N/A 106000 lbf·in12000 N·m	N/A 126800 lbf·in14300 N·m	N/A 1430 rpm
224H-LIS	N/A 17900 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake	N/A 158000 lbf·in17900 N·m	N/A 198000 lbf·in22400 N·m	N/A 252300 lbf·in28500 N·m	N/A 1430 rpm
324H-LIS	N/A 24900 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake	N/A 220000 lbf·in24900 N·m	N/A 275000 lbf·in31100 N·m	N/A 374300 lbf·in42300 N·m	N/A 1430 rpm
227-LIS	N/A 20100 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake	N/A 178000 lbf·in20100 N·m	N/A 222000 lbf·in25100 N·m	N/A 267000 lbf·in30200 N·m	N/A 1270 rpm
327-LIS	N/A 27900 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake	N/A 247000 lbf·in27900 N·m	N/A 309000 lbf·in34900 N·m	N/A 370000 lbf·in41800 N·m	N/A 1270 rpm
230H-LIS	N/A 40200 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake	N/A 356000 lbf·in40200 N·m	N/A 445000 lbf·in50300 N·m	N/A 534000 lbf·in60300 N·m	N/A 1140 rpm

Item #

Item Name

Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) (4.1 bar) Minimum Release Pressure

Static Torque Rating at 75 Pound Force per Square Inch (lbf/in²) (5.2 bar) Minimum Release Pressure

Static Torque Rating at 90 Pound Force per Square Inch (lbf/in²) (6.2 bar) Minimum Release Pressure

Maximum Speed Hub and Center Plate (CP)

106-LIS

N/A 284 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake

N/A 2510 lbf·in284 N·m

N/A 3130 lbf·in354 N·m

N/A 3760 lbf·in425 N·m

N/A 5280 rpm

206-LIS

N/A 567 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake

N/A 5020 lbf·in567 N·m

N/A 6270 lbf·in708 N·m

N/A 7520 lbf·in850 N·m

N/A 5280 rpm

108-LIS

N/A 467 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake

N/A 4130 lbf·in467 N·m

N/A 5170 lbf·in584 N·m

N/A 6200 lbf·in701 N·m

N/A 4290 rpm

208-LIS

N/A 858 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake

N/A 7590 lbf·in858 N·m

N/A 9480 lbf·in1070 N·m

N/A 11400 lbf·in1290 N·m

N/A 4290 rpm

111-LIS

N/A 1050 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake

N/A 9270 lbf·in1050 N·m

N/A 11600 lbf·in1310 N·m

N/A 13900 lbf·in1570 N·m

N/A 3120 rpm

211-LIS

N/A 1930 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake

N/A 17100 lbf·in1930 N·m

N/A 21400 lbf·in2420 N·m

N/A 25700 lbf·in2900 N·m

N/A 3120 rpm

311-LIS

N/A 2670 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake

N/A 23600 lbf·in2670 N·m

N/A 29500 lbf·in3330 N·m

N/A 35400 lbf·in4000 N·m

N/A 3120 rpm

114-LIS

N/A 1740 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake

N/A 15400 lbf·in1740 N·m

N/A 19300 lbf·in2180 N·m

N/A 23100 lbf·in2610 N·m

N/A 2450 rpm

214-LIS

N/A 3200 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake

N/A 28300 lbf·in3200 N·m

N/A 35400 lbf·in4000 N·m

N/A 42400 lbf·in4790 N·m

N/A 2450 rpm

314-LIS

N/A 4370 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake

N/A 38700 lbf·in4370 N·m

N/A 48400 lbf·in5470 N·m

N/A 58100 lbf·in6560 N·m

N/A 2450 rpm

116-LIS

N/A 2430 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake

N/A 21500 lbf·in2430 N·m

N/A 26800 lbf·in3030 N·m

N/A 32200 lbf·in3640 N·m

N/A 2140 rpm

216-LIS

N/A 4490 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake

N/A 39700 lbf·in4490 N·m

N/A 49600 lbf·in5600 N·m

N/A 59600 lbf·in6730 N·m

N/A 2140 rpm

316-LIS

N/A 6200 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake

N/A 54900 lbf·in6200 N·m

N/A 68600 lbf·in7750 N·m

N/A 82300 lbf·in9300 N·m

N/A 2140 rpm

118-LIS

N/A 4000 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake

N/A 35400 lbf·in4000 N·m

N/A 44200 lbf·in4990 N·m

N/A 53100 lbf·in6000 N·m

N/A 1900 rpm

218-LIS

N/A 7540 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake

N/A 66700 lbf·in7540 N·m

N/A 83400 lbf·in9420 N·m

N/A 100000 lbf·in11300 N·m

N/A 1900 rpm

318-LIS

N/A 10300 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake

N/A 91200 lbf·in10300 N·m

N/A 114000 lbf·in12900 N·m

N/A 137000 lbf·in15500 N·m

N/A 1900 rpm

121-LIS

N/A 5850 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake

N/A 51800 lbf·in5850 N·m

N/A 64800 lbf·in7320 N·m

N/A 77700 lbf·in8780 N·m

N/A 1630 rpm

221-LIS

N/A 10900 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake

N/A 96700 lbf·in10900 N·m

N/A 121000 lbf·in13700 N·m

N/A 145000 lbf·in16400 N·m

N/A 1630 rpm

321-LIS

N/A 15000 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake

N/A 133000 lbf·in15000 N·m

N/A 166000 lbf·in18800 N·m

N/A 199000 lbf·in22500 N·m

N/A 1630 rpm

124H-LIS

N/A 9620 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake

N/A 85100 lbf·in9620 N·m

N/A 106000 lbf·in12000 N·m

N/A 126800 lbf·in14300 N·m

N/A 1430 rpm

224H-LIS

N/A 17900 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake

N/A 158000 lbf·in17900 N·m

N/A 198000 lbf·in22400 N·m

N/A 252300 lbf·in28500 N·m

N/A 1430 rpm

324H-LIS

N/A 24900 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake

N/A 220000 lbf·in24900 N·m

N/A 275000 lbf·in31100 N·m

N/A 374300 lbf·in42300 N·m

N/A 1430 rpm

227-LIS

N/A 20100 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake

N/A 178000 lbf·in20100 N·m

N/A 222000 lbf·in25100 N·m

N/A 267000 lbf·in30200 N·m

N/A 1270 rpm

327-LIS

N/A 27900 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake

N/A 247000 lbf·in27900 N·m

N/A 309000 lbf·in34900 N·m

N/A 370000 lbf·in41800 N·m

N/A 1270 rpm

230H-LIS

N/A 40200 Newton Meter (N·m) Static Torque Rating at 60 Pound Force per Square Inch (lbf/in²) Minimum Release Pressure Low Inertia Spring-Set Brake

N/A 356000 lbf·in40200 N·m

N/A 445000 lbf·in50300 N·m

N/A 534000 lbf·in60300 N·m

N/A 1140 rpm