Farmer-Helper DW30 Chipper 29 Revision 09 - 2017
Pdf 34.wdp
8.2 BOLT TORQUE
CHECKING BOLT TORQUE
The tables shown below give correct torque values for various bolts and capscrews. Tighten all bolts to the
torques specified in chart unless otherwise noted. Check tightness of bolts periodically, using bolt torque
chart as a guide. Replace hardware with the same strength bolt.
ENGLISH TORQUE SPECIFICATIONS
Bolt
Diameter SAE 2
"A" (N.m) (lb-ft)
Bolt Torque*
SAE 5 SAE 8
(N.m) (lb-ft) (N.m) (lb-ft)
1/4"
8 6
12
9 17 12
5/16"
13 10
25
19 36 27
3/8"
27 20
45
33 63 45
7/16"
41 30
72
53 100 75
1/2"
61 45
110
80 155 115
9/16"
95 60
155
115 220 165
5/8"
128 95
215
160 305 220
3/4"
225 165
390
290 540 400
7/8"
230 170
570
420 880 650
1"
345 225
850
630 1320 970
METRIC TORQUE SPECIFICATIONS
Bolt
Diameter
"A"
Bolt Torque*
8.8 10.9
(N.m) (lb-ft) (N.m) (lb-ft)
M3
.5 .4 1.8 1.3
M4
3 2.2 4.5 3.3
M5
6 4 9 7
M6
10 7 15 11
M8
25 18 35 26
M10
50 37 70 52
M12
90 66 125 92
M14
140 103 200 148
M16
225 166 310 229
M20
435 321 610 450
M24
750 553 1050 774
M30
1495 1103 2100 1550
M36
2600 1917 3675 2710
Torque figures indicated above are valid for non-greased or non-oiled threads and heads unless otherwise
specified. Therefore, do not grease or oil bolts or capscrews unless otherwise specified in this manual.
When using locking elements, increase torque values by 5%.
* Torque value for bolts and capscrews are identified by their head markings.
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