Recommended Torques - MacDon R80 Manual

RECOMMENDED TORQUES

I. GENERAL
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 throughout
this manual.
Check tightness of bolts periodically, using
•
bolt torque chart as a guide.
• Replace hardware with the same strength
bolt.
• Torque figures are valid for non-greased or
non-oiled threads
otherwise specified. Do not grease or oil
bolts or capscrews unless specified in this
manual. When using locking elements,
increase torque values by 5%.
II. SAE BOLTS
SAE-5 SAE-8
NC Bolt Torque*
Bolt
SAE 5
Dia.
"A" lb-ft N·m
1/4" 9 12
5/16" 18 24
3/8" 32 43
7/16" 50 68
1/2" 75 102
9/16" 110 149
5/8" 150 203
3/4" 265 359
7/8" 420 569
1" 640 867
* Torque categories for bolts and capscrews are
identified by their head markings.
Form # 169080
and heads unless
SAE 8
lb-ft N·m
11 15
25 34
56
41
70 95
105 142
149 202
200 271
365 495
600 813
890 1205
III. METRIC BOLTS
NC BOLT TORQUE*
BOLT
DIA.
8.8
"A"
lb-ft
M3 0.4
M4 2.2
M5 4
M6 7
M8 18
M10 37
M12 66
M14 103
M16 166
M20 321
M24 553
M30 1103
M36 1917
* Torque categories for bolts and capscrews are
identified by their head markings.
4
8.8 10.9
10.9
N·m lb-ft N·m
0.5 1.3 1.8
3 3.3 4.5
6 7 9
10 11 15
25 26 35
50 52 70
90 92 125
140 148 200
225 229 310
435 450 610
750 774 1050
1495 1550 2100
2600 2710 3675
Issue – April 2007