GENERAL / Tightening IMPORTANT: The following items are applied to both fine and coarse pitch threads. 1. When tightening, apply lubricant in order to reduce friction coefficient of bolts and nuts. (Ex. white zinc B dissolved into spindle oil) 2. Torque tolerance is ± 20 %. 3. Use the bolts of correct length. The bolts that are too long cannot be tightened as the bolt tip comes into contact with the bottom of bolt hole. The bolts that are too short cannot develop sufficient tightening force. 4. The torques given in table on the previous page are for general use only. Do not use these torques if a different torque is given for a specific application. 5.
Clean the nut and bolt threads and remove dirt or corrosion before installing. Specified Tightening Torque Tightening Order When tightening two or more bolts, tighten them alternately, as shown, to ensure even tightening. Equally tighten upper and lower alternately Tighten diagonally Tighten from center and diagonally 1.4 1 3 12 14 9 4 1 6 7 6 2.3 4 5 2 13 8 5 2 3 10 11 W105-01-01-003 W1-2-3 Bolt Dia.
(mm) Socket Bolt Wrench Size (mm) Target Value Allowable Value N⋅m kgf⋅cm N⋅m kgf⋅cm 4 4.49 45.8 3.60 to 5.39 36.7 to 55.0 3 5 9.24 94.2 7.40 to 11.1 75.5 to 113 4 6 15.6 159 12.6 to 18.7 128 to 191 5 8 38.3 391 30.7 to 46.0 313 to 469 6 10 76.5 780 61.2 to 91.8 624 to 936 8 12 133 1360 108 to 161 1100 to 1640 10 14 216 2200 173 to 258 1760 to 2630 12 16 341 3480 272 to 409 2770 to 4170 14 18 463 4720 370 to 555 3770 to 5660 14 20 665 6780 534 to 797 5440 to 8130 17 22 918 9360 734 to 1100 7480 to 11200 17 24 1150 11700 919 to 1380 9370 to 14100 19 27 1720 17500 1370 to 2050 14000 to 20900 19 30 2300 23500 1840 to 2770 18800 to 28200 22 33 3170 32300 2540 to 3810 25900 to 38800 24 36 4060 41400 3240 to 4860 33000 to 49600 27 39 5290 53900 4240 to 6350 43200 to 64800 27