A GUIDE TO TORQUE VALUES - Norbar
the recommended torque by the appropriate factor shown in the table. Example: bolt and nut are both phosphated; required torque = torque recommended x 0.75. Surface condition of bolt Self Zinc Cadmium Phosphate Self 1.00 1.00 0.80 0.90 Zinc 1.15 1.20 1.35 1.15 Cadmium 0.85 0.90 1.20 1.00 Phosphate and oil
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A GUIDE TO TORQUE VALUES - Norbar Torque
www.norbar.comBeaumont Road Tel: + 44 (0) 1295 270333 Banbury Fax: + 44 (0) 1295 753643 Oxfordshire, OX16 1XJ E-mail: enquiry@norbar.com UNITED …
The Checking and Calibration of Torque Wrenches
www.norbar.com1. The calibration must be carried out in controlled temperature and humidity conditions. Records must be kept of the temperature during the calibration. 2. The torque measuring instrument is called a calibration device in the standard. This device must have an uncertainty of measurement no greater than +/-1% of reading.
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