Land Pride OFM3678, Manual

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Section 7: Torque Values Chart
OFM3678, OFM3690 & OFM3698 Offset Flail Mowers 333-149M 6/11/21
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Table of Contents
Torque Values Chart
Torque Values Chart for Common Bolt Sizes
Bolt Head Identification Bolt Head Identification
Bolt Size
(inches) Grade 2 Grade 5 Grade 8
Bolt Size
(Metric) Class 5.8 Class 8.8 Class 10.9
in-tpi
1
N · m
2
ft-lb
3
N · m ft-lb N · m ft-lb mm x pitch
4
N · m ft-lb N · m ft-lb N · m ft-lb
1/4" - 20
7.4 5.6 11 8 16 12
M 5 X 0.8
4 3 6 5 9 7
1/4" - 28
8.5 6 13 10 18 14
M 6 X 1
7 5 11 8 15 11
5/16" - 18 15 11 24 17 33 25 M 8 X 1.25 17 12 26 19 36 27
5/16" - 24 17 13 26 19 37 27 M 8 X 1 18 13 28 21 39 29
3/8" - 16
27 20 42 31 59 44
M10 X 1.5
33 24 52 39 72 53
3/8" - 24
31 22 47 35 67 49
M10 X 0.75
39 29 61 45 85 62
7/16" - 14 43 32 67 49 95 70 M12 X 1.75 58 42 91 67 125 93
7/16" - 20 49 36 75 55 105 78 M12 X 1.5 60 44 95 70 130 97
1/2" - 13
66 49 105 76 145 105
M12 X 1
90 66 105 77 145 105
1/2" - 20
75 55 115 85 165 120
M14 X 2
92 68 145 105 200 150
9/16" - 12 95 70 150 110 210 155 M14 X 1.5 99 73 155 115 215 160
9/16" - 18 105 79 165 120 235 170 M16 X 2 145 105 225 165 315 230
5/8" - 11
130 97 205 150 285 210
M16 X 1.5
155 115 240 180 335 245
5/8" - 18
150 110 230 170 325 240
M18 X 2.5
195 145 310 230 405 300
3/4" - 10 235 170 360 265 510 375 M18 X 1.5 220 165 350 260 485 355
3/4" - 16 260 190 405 295 570 420 M20 X 2.5 280 205 440 325 610 450
7/8" - 9
225 165 585 430 820 605
M20 X 1.5
310 230 650 480 900 665
7/8" - 14
250 185 640 475 905 670
M24 X 3
480 355 760 560 1050 780
1" - 8 340 250 875 645 1230 910 M24 X 2 525 390 830 610 1150 845
1" - 12 370 275 955 705 1350 995 M30 X 3.5 960 705 1510 1120 2100 1550
1-1/8" - 7
480 355 1080 795 1750 1290
M30 X 2
1060 785 1680 1240 2320 1710
1-1/8" - 12
540 395 1210 890 1960 1440
M36 X 3.5
1730 1270 2650 1950 3660 2700
1-1/4" - 7 680 500 1520 1120 2460 1820 M36 X 2 1880 1380 2960 2190 4100 3220
1-1/4" - 12 750 555 1680 1240 2730 2010
1
in-tpi = nominal thread diameter in inches-threads per inch
1-3/8" - 6
890 655 1990 1470 3230 2380
2
N· m = newton-meters
1-3/8" - 12
1010 745 2270 1670 3680 2710
3
ft-lb= foot pounds
1-1/2" - 6 1180 870 2640 1950 4290 3160
4
mm x pitch = nominal thread diameter in millimeters x thread
pitch
1-1/2" - 12 1330 980 2970 2190 4820 3560
Torque tol 0%, -15% of torquing values. Unless otherwise specified use torque values listed above.
All locknuts or lubricated fasteners: Use 75% of torque value. (i.e. 1/2"-13 GR5 = 76 ft-lb; 75% of 76 or .75 x 76 = 57 ft-lb)
5.8
8.8 10.9
Section 7: Torque Values Chart