National Crane 600H, Руководство по обслуживанию

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NATIONAL CRANE
08-19-2022 Control # 092-13
1-19
600H SERVICE MANUAL INTRODUCTION
1
Weld Studs
Unless otherwise specified the following grade 2 torque
values (+/- 10%) apply.
Table 1-13Weld Stud Torque Values
Using Torque Wrench Extensions
1. Torque wrench extensions are designed to extend the
range or versatility of torque wrenches. Torque wrench
scale readings or limit settings shall be computed with
the following formulas when an extension handle is
employed. The sketch below shows which formula is to
be used, adding “A” or subtracting “A” when calculating
the torque wrench setting.
2. If the offset C/L is not in line with the torque wrench C/L,
then you must measure the distance from the C/L of the
torque wrench to the C/L of the offset by using a square.
Then apply this dimension to the torque wrench setting
formula. See sketch below.
3. If offset is positioned at right angles to the torque
wrench, then the offset will not change the effective
M20x1.5
8.8 483 464.5 446
10.9 679 653 627
12.9 816 785 754
M22x1.5
8.8 657 632 607
10.9 924 888.5 853
12.9 1111 1068 1025
M24x2
8.8 836 803.5 771
10.9 1176 1130.5 1085
12.9 1410 1356 1302
M27x2
8.8 1225 1171.5 1130
10.9 1718 1652.5 1587
12.9 2063 1983.5 1904
M30x1.5
8.8 1530 1471.5 1413
10.9 2253 2166.5 2080
12.9 2637 2536 2435
M30x2
8.8 1661 1597.5 1534
10.9 2336 2246.5 2157
12.9 2800 2695 2590
M33x2
8.8 2141 2059 1977
10.9 3155 3034 2913
12.9 3692 3550.5 3409
M36x2
8.8 2795 2688 2581
10.9 4118 3960 3802
12.9 4818 4634 4450
Table 1-12Metric Series with Fine Threads – Untreated (black finish) (Continued)
Size
Property
Class
Torque (Nm)
Maximum Nominal Minimum
T-2-4
REFERENCE ONLY