Fayat BOMAG BC 462 RB, Руководство по обслуживанию

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1.4
Tightening torques
BOMAG 30 008 917 13
The values specified in the table apply for screws:
l
black oiled
l
with surface protection A4C
l
with surface protection DACROMET
i
Note
The difference between Withworth and UNF/UNC threads is the fact that UNF and UNC threads have 60° flanks,
as the metric ISO-thread, whereas Withworth has a flank of only 55°.
DACROMET is a surface protection that mainly consists of zinc and aluminium in a chromium oxide matrix. DAC-
ROMETIZATION provides excellent corrosion protection for metal surfaces by applying a mineral coating with
metallic-silver appearance.
Tightening torques for screws with UNC thread,
*
UNC Unified Coarse Thread Series, American Unified
Coarse Thread
* Coefficient of friction
μ
tot. = 0,14
Screw dimension
Tightening torques Nm
8.8 10.9 12.9
1/4“ - 20 11 15 19
5/16“ - 18 23 32 39
3/8“ - 16 39 55 66
7/16“ - 14 62 87 105
1/2“ - 13 96 135 160
9/16“ - 12 140 200 235
5/8“ - 11 195 275 330
3/4“ - 10 345 485 580
7/8“ - 9 560 770 940
1“ - 8 850 1200 1450
1 1/8“ - 7 1200 1700 2000
1 1/4“ - 7 1700 2400 2900
1 3/8“ - 6 2200 3100 3700
1 1/2“ - 6 3000 4200 5100
Tightening torques for screws with UNF thread,
*
UNF Unified National Fine Thread Series, American
Unified Fine Thread
Screw dimension
Tightening torques Nm
8.8 10.9 12.9
1/4“ - 28 13 18 22
5/16“ - 24 25 35 42
3/8“ - 24 45 63 76
7/16“ - 20 70 100 120
1/2“ - 20 110 155 185
9/16“ - 18 155 220 260
5/8“ - 18 220 310 370
3/4“ - 16 385 540 650
7/8“ -14 620 870 1050