Titan Implement, LLC 53 1200-1600 Series Rotary Cutters
(423) 334-0012 August 2016
11.1 Bolt Torque
Torque fi gures indicated in the charts are used for
non-greased or non-oiled threads and heads unless
otherwise specifi ed. Therefore, do not grease or oil
bolts or cap screws unless otherwise specifi ed in this
manual. When using locking elements, increase torque
values by 5%.
The tables shown below give correct torque values for
various bolts and capscrews. Tighten all bolts to the
torques specifi ed in the charts unless otherwise noted.
Check tightness of bolts periodically, using the bolt
torque chart as a guide. Always replace hardware with
the same Grade bolt.
11.1.1 Standard Torque Values
Bolt
Diameter
English Bolt Torque Specifications*
Grade 2
No Marking
Grade 5
3 Radial Lines
Grade 8
6 Radial Lines
N·m ft.lbs. N·m ft.lbs. N·m ft.lbs.
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 95 215 158 305 220
3/4" 225 165 390 290 540 398
7/8" 230 170 570 420 880 650
1" 345 225 850 630 1320 970
WARNING
OEM
EQUIPMENT FAILURE
The torque value for bolts and capscrews are
identifi ed by their head markings. Replacing
higher “Grade” bolts (Grade 5) with lower Grade
bolts will lead to equipment failure and can result in
injury or death. Always use replacement bolts with
the same Grade markings as the removed bolt.
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