TRANSMISSION Ch 2 page 8 Torque limits for screws. Table TORQUE LIMITS FOR SCREWS (IN Nm) ACCORDING TO ZF - STANDARDS 148 Friction value : µ total= 0,12 for screws and nuts without after - treatment as well as phosphatized nuts. Tightening by hand! Torque limits, if not especially indicated, can be taken from the following list:
Metric ISO Standard thread Metric ISO Fine thread Setting clutch Figure 1 SHOP MANUAL Size 8.8 10.9 4,1 8,1 14 23 34 68 115 185 280 390 560 750 960 1400 1900 2600 3300 4300 12.9 M4 2,8 4,8 M5 5,5 9,5 M6 9,5 16,5 M7 15 28 M8 23 40 M10 46 79 M12 79 135 M14 125 215 M16 195 330 M18 280 460 M20 390 650 M22 530 880 M24 670 1100 M27 1000 1650 M30 1350 2250 M33 1850 3000 M36 2350 3900 M39 3000 5100 Size 8.8 10.9 12.9 M 8 x 1 24 36 43 M 9 x 1 36 53 62 M 10 x 1 52 76 89 M 10 x 1,25 49 72 84 M 12 x 1,25 87 125 150 M 12 x 1,5 83 120 145 M 14 x 1,5 135 200 235 M 16 x 1,5 205 300 360 M 18 x 1,5 310 440 520 M 18 x 2 290 420 490 M 20 x 1,5 430 620 720 M 22 x 1,5 580 820 960 M 24 x 1,5 760 1100 1250 M 24 x 2 730 1050 1200 M 27 x 1,5 1100 1600 1850 M 27 x 2 1050 1500 1800 M 30 x 1,5 1550 2200 2550 M 30 x 2 1500 2100 2500 M33 x 1,5 2050 2900 3400 M 33 x 2 2000 2800 3300 M 36 x 1,5 2700 3800 4450 M 36 x 3 2500 3500 4100 M 39 x 1,5 3450 4900 5700 M 39 x 3 3200 4600 5300 Designation Dimensions Measuring instrument Comment Chapter/Section Disk clearance 3.80 mm – 4.60 mm Dial gauge 8 EP 320/370 A • Assembling clutch Disk clearance 4.60 mm – 5.50 mm Dial gauge 8 EP 420/470 A • Assembling clutch Disk clearance 3.90 mm – 4.70 mm Dial gauge 8 EP 320/370 A • Assembling clutch Disk clearance 4.20 mm – 5.00 mm Dial gauge 8 EP 420/470 A Disk clearance 3.80 mm – 4.60 mm Dial gauge • Assembling clutch Disk clearance 3.20 mm – 4.80 mm Dial gauge • Assembling plane- tary drive