S-SERIES RDA (RUN DOWN ADAPTER) OPERATING INSTRUCTIONS
Rev 1.0 (7/15/2024)
Run Down Adapter A run down adapter (RDA) is required when testing power tools with a torque analyzer or static-type torque sensors. These joint simulators provide consistent and reliable torque readings for use with power-driven torque control tools. A rundown adapter reduces the impact and irregular peaks that cause poor repeatability. The adapter is mounted inline between the tool's drive and the transducer of the torque analyzer or sensor. The S-Series run adapter is designed to provide run down simulation for a “soft joint” application.
Torque Testing Operation 1. The torque analyzer or sensor should be properly secured on a solid surface or a test bench. 2. The run down adapter is mounted in-line between the tool drive's bit and the transducer of the torque analyzer or sensor. 3. Before each test operation, the run down adapter should be completely backed-up so the input drive can rotate freely. 4. The run down adapter is designed to run in a clockwise direction only. 5. Apply torque until the power tool shuts off and RDA is run down entirely. Then, note or save the torque reading with the analyzer. 6. The RDA should be completely backed up after each run down.
Input Drive
Torque Test Scatter Graph The graph below shows torque values recorded after each test run.
Mean Torque: 11.72 lbf.in Standard Deviation: 1.53 lbf.in
Output Drive
The run down adapter is designed to provide minimal scattering when used with a reliable and repeatable power tools, transducers and torque analyzers. The test equipment and method that are used will affect the performance of the run down adapters.
SILICON VALLEY HEADQUARTERS 1080 North 11th Street, San Jose, CA 95112 | Phone: (408) 292-2214 | Fax: (408) 292-2733 | mountztorque.com
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Preventative Maintenance Pay special attention to the cycle count of the screw used in the RDA. Using the screw for more than the recommended cycles may cause erratic test results. When the screw is changed out, it is recommended to add molybdenum grease to the thread of the screw and a light coat to the top face of the top washer. This will help reduce friction and improve consistent results. It is recommended that the RDA be disassembled and cleaned and that the threads be re-coated with molybdenum grease every six months.
Add molybdenum grease
Models
Item #
Input Drive
Cycles
Screw Size (diameter/TPI) M2x0.4Px8L, HEX1.5 M3x0.5Px10L, HEX2.5 M3x0.5Px20L, HEX2.5 M8x1.25Px35L, HEX6 M8x1.25Px35L, HEX6 M8x1.25Px35L, HEX6 M12x1.75Px40L, HEX10 M12x1.75Px40L, HEX10
Per Screw
RDA-S0
070843 070836 070835 070833 070834 070840 070839 070841
80 80
RDA-S1.5 RDA-S10 RDA-S15 RDA-S75 RDA-S200 RDA-S400 RDA-S600
80
500
2000 2000 2000 2000
Mountz Calibration and Repair Services Mountz Inc. features an experienced calibration and repair staff. Our trained technicians can calibrate and repair most any tool. Mountz provides rapid service with quality that you can trust as we offer two state-of-the-art calibration lab and repair facilities that can calibrate up to 20,000 lbf.ft. About Mountz Mountz, The Torque Tool Specialists ® , has been a leader in the torque tool industry for more than 60 years. Engineered in the Silicon Valley and serving the globe, Mountz focuses on delivering high-quality torque products, services, and solutions to ensure customers can always proceed with confidence. We are committed to forging a safer world through precision and accuracy and by innovating every day.
Mountz Service Locations
Eastern Service Center 19051 Underwood Rd. Foley, AL 36535 Phone: (251) 943-4125 Fax: (251) 943-4979 Western Service Center 1080 N.11th Street San Jose, CA 95112 Phone: (408) 292-2214 Fax: (408) 292-2733 UK Service Center Pier Copse Courtyard, Milland Lane, Liphook, Hampshire, GU30 7JN, UK Phone: 00 44 1428 741756
www.mountztorque.com
SILICON VALLEY HEADQUARTERS 1080 North 11th Street, San Jose, CA 95112 | Phone: (408) 292-2214 | Fax: (408) 292-2733 | mountztorque.com
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