Gesipa - Main Catalog Page 198
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TECHNICAL DATA SCHEMATIC LAYOUT FOR THE THREAD TEAR-OUT TEST The maximum bearable axial load on the thread is the thread breaking force [(N) and (kp)]. GESIPA® uses screws of the strength class 10.9 or higher that are free of all lubricants for the test. The test takes place in the lower and upper clamping range. SCHEMATIC LAYOUT FOR THE TORQUE TEST The tightening torque [(Nm) or (lb-ft)] specifies the maximum torque with which the screw can be tightened. For testing, GESIPA® uses screws of the strength class 10.9 or higher that are free of all lubricants. A hardened washer is used as the clamping part. The test is carried out in the lower and the upper clamping range, where the blind rivet nuts are loaded with the specified torque. Then the screw is screwed out again. F M F F The thread must still turn smoothly in order to pass the test. Then the blind rivet nut is loaded again up to the overtorque. THE TIGHTENING TORQUE (NM) AND (LB-FT) Alu Steel (lb-ft) Nm Nm Stainless steel A2 /A4 / Monel® (lb-ft) (lb-ft) Nm M4 2.5 1.8 3.0 2.2 5.5 4.1 M5 5.0 3.7 8.0 5.9 14.0 10.3 M6 9.5 7.0 12.0 8.9 27.0 19.9 M8 17.5 12.9 30.0 22.1 40.0 M10 28.0 20.7 38.0 28.0 - 29.5 (kp) 815 1,172 1,836 2,853 3,057 Stainless steel A2 /A4 / Monel® N (kp) 10,000 1,019 15,000 1,529 > 25,000 2,548 > 30,000 3,057 - THREAD BREAKING FORCE (N) AND (KP) Alu M4 M5 M6 M8 M10 196 N 4,800 5,700 9,500 13,000 14,000 Steel (kp) 489 581 968 1,325 1,427 N 8,000 11,500 18,000 28,000 30,000
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