Falk™ True Hold® Low Speed Backstops The Greater the Force, the Tighter the Hold (English-Inch)

Falk™ True Hold® Low Speed Backstops Never Let Safety Slip Anytime you're moving materials up grade, you've got the potential for trouble. Should the power quit, a motor fail or someone trip the emergency cable, the results can be disastrous... for employees and equipment. That's why operations the world over, rely on Falk True Hold ® Backstops and their instant-response, no-slip mechanism to help put a stop to trouble before it can start. Size-for-size True Hold Backstops provide more system holding power than any other backstop. Plus, Long-life designs and our ability to engineer and manufacture...

No Slip Prevents Reverse Rotation - The instant-response, fail-safe roller/ramp stopping mechanism eliminates the potential for slippage, reliably protecting man, machine and your entire investment.Rexnord Drive System Stock Bore Size NRT Backstop Inch 1075NRT 2.9375 3.4375 3.5000 3.7500 3.9375 Helps you select the proper backstop size and configuration for your specific application - single, tandem or multiple units with torque ratings to 747,000 lb-ft. (1 012 185 Nm) 1085NRT 3.9375 4.4375 4.5000 4.7500 4.9375 5.0000 True Hold Backstops Provide True Confidence 1095NRT 4.9375 5.4375 For virtually...

Falk™ True Hold® Selection Guide 4

Selection Guide 561-110, April 2007 Table of Contents How to Select Falk NRT & NRTH Backstops . . . . . . . . . . . . 6 – 7 Common Drive Arrangements. . . . . . . . . . . . . . . . . . . . . . . . . 8 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 –13 Backstop Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 –15 Engineering Recommendations . . . . . . . . . . . . . . . . . . . 17 –21 How to Order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Backstop Selection Procedure Definitions. . . . . . . . . . . . . . . . 22...

How to Select Falk True Hold NRT & NRTH Backstops — Imperial (Refer to Page 20 for explanation of terms and How to Order) 1. Determine Drive Arrangements from Page 8. Refer arrangements in Figures 4 & 5 to Factory for selection. 2. Determine System Torque. Fig. 2 — Tandem motor, single backstop arrangements. Fig. 3 — Tandem motor, tandem backstop arrangements. Combine the horsepower from both motors. System Torque = 5250 (MHP or BHP or LHP) rpm (rev/min) MHP — Motor Nameplate HP BHP — Brake HP (Calculated Load). Use only if more than 75% of motor rating. LHP Q — Lift HP (Calculated Power to Lift...

How to Select Falk True Hold NRT & NRTH Backstops — Metric (Refer to Page 20 for explanation of terms and How to Order) 1. Determine Drive Arrangements from Page 8. Refer arrangements in Figures 4 & 5 to Factory for selection. 2. Determine System Torque. Fig. 2 — Tandem motor, single backstop arrangements. Fig. 3 — Tandem motor, tandem backstop arrangements. Combine the kilowatts from both motors. System Torque = 9541 MkW or BkW or LkW rpm (rev/min) MkW — Motor(s) Nameplate kW BkW — Brake kW (Calculated Load). Use only if more than 75% of motor rating. LkW Q — Lift kW (Calculated Power to Lift...

Common Drive Arrangements Figure 1 — Single motor, single backstop arrangements A. B. Figure 2 — Tandem motor, single backstop arrangements – Select backstop to hold the entire system torque. For drive arrangements shown in Figures 4 & 5, Engineered Selections, Indexing applications, Vertical applications or for drive arrangements not shown, refer to Factory for selection. We will select a backstop for you if you furnish the following information: • Drive arrangement • Motor nameplate hp (kW) • Motor maximum torque as % of nameplate • Headshaft rpm (rev/min), diameter, diameter tolerance, length...

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Type NRTH – Style B Dimensions — Inches & Millimeters 90° MOUNT IN ANY POSITION 180° 0° 270° TORQUE ARM (CAN GO ON EITHER SIDE) BREATHER VENT (1055 & 1065 ONLY) P DIRECTION OF FREE ROTATION ARROW K B H .250” CLEARANCE E E W FR C J G FR J/2 A L E E .250” CLEARANCE D-DIA Y E PURCHASER TO FURNISH EITHER STIRRUP OR ANCHOR PIN F PIPE PLUG X O BACKSTOP SHOWN AT 180° MOUNTING POSITION Dimensions — Inches Bore H Backstop Torque Max Size Rating rpm Min Max lb-ft 1045 1055 1065 1085 2,100 1,800 1.75 10,000 500 1.75 13,000 400 2.50 18,000 350 3.94 A B 2.50 6.50 4.19 3.75 9.75 8.14 4.50 10.50 8.64 5.44 12.00...

Type NRTH – Style C Dimensions — Inches & Millimeters 90° MOUNT IN ANY POSITION 180° 0° 270° TORQUE ARM (CAN GO ON EITHER SIDE) BREATHER VENT P DIRECTION OF FREE ROTATION ARROW K B H .250” CLEARANCE E E W FR C J G FR J/2 A L E E .250” CLEARANCE D-DIA Y PURCHASER TO FURNISH EITHER STIRRUP OR ANCHOR PIN E PIPE PLUG F X O BACKSTOP SHOWN AT 180° MOUNTING POSITION Dimensions — Inches Backstop Torque Speed Range Bore H Size lb-ft Min Max Min Max 1055 1065 4,400 8,400 A Cn B D E F 320 2,100 1.75 3.75 9.75 8.14 7.50 1.125 2.00 36.00 250 1,800 2.50 4.50 10.50 8.64 8.00 1.125 2.00 36.00 G H J K L W X 8.50...

NRT Dimensions — Inches AXIAL RETAINING COLLAR POSITIONS (MOUNT ON EITHER SIDE) D F G E K P C B L J PURCHASER TO FURNISH STOPS VENT TA KEY OIL LINE & OIL LEVEL SIGHT GAGE W 1.00 TO 1.50 CLEARANCE Type H A M BORE DRAIN N O For Bore and Keyway Sizes and Tolerances, Refer to Pages 16 thru 19 Max † Torque OverBACKSTOP Rating running SIZE H (lb-ft) Speed (rpm) 1075NRT 1085NRT 1095NRT 1105NRT 1115NRT 1125NRT 1135NRT 1145NRT 1155NRT 1165NRT 1175NRT 1185NRT 10,000 16,000 28,000 45,000 75,000 105,000 150,000 212,000 249,000 346,000 519,000 747,000 450 350 300 180 150 135 125 115 100 85 80 70 Bore ‡ Min...

NRT Dimensions — Millimeters AXIAL RETAINING COLLAR POSITIONS (MOUNT ON EITHER SIDE) D F G E K P C B L J PURCHASER TO FURNISH STOPS VENT TA KEY W H A OIL LINE & OIL LEVEL SIGHT GAGE 25 mm TO 38 mm CLEARANCE Type M BORE DRAIN N O For Bore and Keyway Sizes and Tolerances, Refer to Pages 16 thru 19 BACKSTOP SIZE H Torque Rating (Nm) Max † Bore ‡ Overrunning Speed Min Max (rpm) A B C D E F¨ Gn J Max K L M N O Pn TA l Max Wt-kg 1075NRT 1085NRT 1095NRT 1105NRT 13 550 21 680 37 940 60 975 450 350 300 180 50 75 85 125 100 130 150 200 295 358 391 490 213 213 269 269 193 193 249 249 127 t 165 Q 183 ª 234...