WPT Power Corporation - Low Inertia Brakes

Unit of Measure

Items	106-LI 510 Newton Meter (N·m) Static Torque Rating at 100 Pound per Square Inch (psi) (7 bar) Pressure Low Inertia Brake	206-LI 1020 Newton Meter (N·m) Static Torque Rating at 100 Pound per Square Inch (psi) (7 bar) Pressure Low Inertia Brake	108-LI 845 Newton Meter (N·m) Static Torque Rating at 100 Pound per Square Inch (psi) (7 bar) Pressure Low Inertia Brake	208-LI 1690 Newton Meter (N·m) Static Torque Rating at 100 Pound per Square Inch (psi) (7 bar) Pressure Low Inertia Brake	111-LI 1900 Newton Meter (N·m) Static Torque Rating at 100 Pound per Square Inch (psi) (7 bar) Pressure Low Inertia Brake
Description	N/A 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.
Brands	N/A WPT®
Static Torque Rating at 100 Pound per Square Inch (psi) (7 bar) Pressure¹	N/A 4520 lbf·in510 N·m	N/A 9030 lbf·in1020 N·m	N/A 7480 lbf·in845 N·m	N/A 15000 lbf·in1690 N·m	N/A 16800 lbf·in1900 N·m
Maximum Speed Hub and Center Plate (CP)	N/A 5290 rpm	N/A 5290 rpm	N/A 4300 rpm	N/A 4300 rpm	N/A 3130 rpm
Maximum Slip Speed	N/A 3530 rpm	N/A 3530 rpm	N/A 2870 rpm	N/A 2870 rpm	N/A 2090 rpm
Total Weight	N/A 23 lb10 kg	N/A 36 lb16 kg	N/A 56 lb25 kg	N/A 64 lb29 kg	N/A 130 lb60 kg
Hub and Center Plate (CP) Weight	N/A 6.6 lb3.0 kg	N/A 12 lb5.6 kg	N/A 9.3 lb4.2 kg	N/A 21 lb10 kg	N/A 27 lb12 kg
Hub and Center Plate (CP) Inertia	N/A 0.17 lb·ft²0.0072 kg·m²	N/A 0.35 lb·ft²0.015 kg·m²	N/A 0.46 lb·ft²0.019 kg·m²	N/A 0.90 lb·ft²0.038 kg·m²	N/A 2.3 lb·ft²0.10 kg·m²
Lining Area	N/A 39 in²250 cm²	N/A 78 in²500 cm²	N/A 55 in²360 cm²	N/A 110 in²710 cm²	N/A 110 in²730 cm²
Minimum Bore Range²	N/A 0.88 in22.4 mm	N/A 0.88 in22.4 mm	N/A 0.94 in23.9 mm	N/A 1.13 in28.7 mm	N/A 1.25 in31.8 mm
Maximum Bore Range³	N/A 1.90 in48.3 mm	N/A 1.90 in48.3 mm	N/A 2.50 in63.5 mm	N/A 2.50 in63.5 mm	N/A 2.80 in71.1 mm
Dimension - A	N/A 8.753 in222.33 mm	N/A 8.753 in222.33 mm	N/A 12.125 in307.98 mm	N/A 12.125 in307.98 mm	N/A 16.000 in406.40 mm
Dimension - A Tolerance	N/A +0.000 in-0.003 in+0.00 mm-0.08 mm
Hole Circle (B)	N/A 8.00 in203.2 mm	N/A 8.00 in203.2 mm	N/A 11.13 in282.7 mm	N/A 11.13 in282.7 mm	N/A 14.75 in374.7 mm
Diameter (B)	N/A 11/32 in	N/A 11/32 in	N/A 17/32 in	N/A 17/32 in	N/A 21/32 in
Quantity	N/A 4	N/A 4	N/A 6	N/A 6	N/A 6
Dimension - C	N/A 7.377 in187.38 mm	N/A 7.377 in187.38 mm	N/A 8.375 in212.80 mm	N/A 8.375 in212.80 mm	N/A 11.375 in288.93 mm
Dimension - C Tolerance	N/A +0.000 in-0.003 in+0.00 mm-0.08 mm
Dimension - A (Metric Mounting)	N/A 220.04 mm	N/A 220.04 mm	N/A 310.00 mm	N/A 310.00 mm	N/A 400.00 mm
Dimension - A Tolerance (Metric Mounting)	N/A +0.00 mm-0.08 mm
Hole Circle (B) (Metric Mounting)	N/A 203.0 mm	N/A 203.0 mm	N/A 280.0 mm	N/A 280.0 mm	N/A 375.0 mm
Diameter (B) (Metric Mounting)	N/A 9.0 mm	N/A 9.0 mm	N/A 14.0 mm	N/A 14.0 mm	N/A 18.0 mm
Quantity (Metric Mounting)	N/A 4	N/A 4	N/A 6	N/A 6	N/A 6
Dimension - C (Metric Mounting - H7)	N/A 190.00 mm	N/A 190.00 mm	N/A 220.00 mm	N/A 220.00 mm	N/A 295.00 mm
Dimension - D	N/A 8-13/16 in223.8 mm	N/A 8-13/16 in223.8 mm	N/A 11-1/8 in282.6 mm	N/A 11-1/8 in282.6 mm	N/A 14-3/4 in374.7 mm
Dimension - E (Ventilated Center Plate)	N/A 3-3/4 in36.5 mm	N/A 4-15/16 in36.5 mm	N/A 4-9/16 in44.5 mm	N/A 5-15/16 in44.5 mm	N/A 5-7/16 in44.5 mm
Dimension - E (Ductile Slotted Center Plate)	N/A	N/A	N/A 5-7/8 in149 mm	N/A 7-1/4 in184 mm	N/A 9-11/16 in209 mm
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	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.