Specifications

16
Bolt Torque - Series II Rotary Cutter
Bolt Torque
Checking Bolt Torque
The tables shown below give correct torque values for various bolts and hex bolts. 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.
Bolt Torque*
Bolt Diameter Grade 2 Bolts Grade 5 Bolts Grade 8 Bolts
(inches) SAE 2 SAE 5 SAE 8
“A” (lb-ft) (N.m) (lb-ft) (N.m) (lb-ft) (N.m)
0.25 (1/4) 6 8 9 12 12 17
0.313 (5/16) 10 13 19 25 27 36
0.375 (3/8) 20 27 33 45 45 63
0.438 (7/16) 30 42 53 72 75 100
0.5 (1/2) 45 61 80 110 115 155
0.563 (9/16) 70 95 115 155 165 220
0.625 (5/8) 95 128 160 215 220 305
.75 (3/4) 165 225 290 390 400 540
0.875 (7/8) 170 230 420 570 650 880
1 225 345 630 850 970 1320
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 hex bolts unless otherwise specified in this manual. When
using locking elements, increase torque values by 5%.
* Torque value for bolts and hex bolts are identified by their head markings.