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friction clutches - Arten Freios e Embreagens Industriais

friction clutches - Arten Freios e Embreagens Industriais

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Table of Contents◗HEAVY DUTY BRAKES“Air Champ” ®QFB MODEL SERIES,SPRING ENGAGED BRAKEELEMENTSThis 8 Model Series of springengaged, air released Quad FacedElements are designed for heavyduty industrial applicationsrequiring high torque and lowinertia:◗ Available with either Standard orHigh coefficient <strong>friction</strong> linings◗ Available in disc sizes from11.500 to 25.000 inches◗ Bore sizes range up to 6.000inches◗ Static Torque ratings up to164,800 In. Lbs.◗ “O”-ring sealed piston andcylinder design reducesmaintenance costs◗ Speeds up to 2200 rpm◗ Thermal Horsepower values upto 14.7◗ Rugged design insures longproduct life◗ Air is supplied directly at thecylinder air inlets◗ Brake can be Thru-Shaft orShaft-End mounted◗ Units are intended for horizontalshaft mounting onlyEach of the 8 Models are detailed on the next 2 pages. Before looking at the details,first acquaint yourself with the important ‘how to order’ information.◗ HOW TO ORDER QFB BRAKE ELEMENTS:1. Determine which bore size you will need;2. If you require a bore size other than the standard Hub bore, you can either orderthis special size from Nexen or machine it yourself.Torque Disc MAX MINProduct Pilot Bore Max Rating Inertia Speed Diseng. Air Shipping Wt.Model Number +.001/-.000 Bore In. Lbs Lb. Ft 2 RPM Pressure (Lbs)Standard Coefficient Friction Linings:QFB 1150-S 964080 1.500 3.250 12,200 5.600 2200 73 PSI 220QFB 1650-S 964082 2.000 5.000 38,200 24.600 1500 70 PSI 392QFB 2200-S 964084 3.000 6.500 67,200 90.000 1100 66 PSI 682QFB 2500-S 964086 3.500 6.500 115,400 139.300 1000 66 PSI 848High Coefficient Friction Linings:QFB 1150-H 964081 1.500 3.250 17,400 5.600 2200 73 PSI 220QFB 1650-H 964083 2.000 5.000 54,400 24.600 1500 70 PSI 392QFB 2200-H 964085 3.000 6.500 96,000 90.000 1100 66 PSI 682QFB 2500-H 964087 3.500 6.500 164,800 139.300 1000 66 PSI 848◗ TORQUE CAPACITIESTorque in Inch-PoundsTorque in Inch-Pounds1220010675915076256100457530501525174001522513050108758700652543502175Standard Coefficient LiningsQFB 1150-S0 10 20 30 40 50 60 70 80Air Pressure in PSIHigh Coefficient LiningsTorque in Inch-PoundsTorque in Inch-Pounds11600010150087000725005800043500290001450016800014700012600010500084000630004200021000Standard Coefficient LiningsQFB 2200-SQFB 1650-S0 10 20 30 40 50 60 70QFB 1150-H QFB 2500-HAir Pressure in PSIHigh Coefficient LiningsQFB 2200-HQFB 1650-HQFB 2500-S0 10 20 30 40 50 60 70 80Air Pressure in PSI0 10 20 30 40 50 60 70Air Pressure in PSINOTE: Torque values for spring applied brakes will vary over the life of the brake as a function of springforce and the burnishing process of the lining. Published torque ratings are minimum values. Over the lifeof the linings, torque values may exceed published values by up to 40%.190

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