Toro Groundsmaster 7210, Service Manual

Page: 22 / 342

Standard Torque for Dry, Zinc Plated, and Steel Fasteners (Inch
Series)
Thread Size Grade 1,
5 and 8
with Thin
Height Nuts
SAE Grade 1 Bolts, Screws,
Studs, and Sems with
Regular Height Nuts
(SAE J995 Grade 2 or
Stronger Nuts)
SAE Grade 5 Bolts, Screws,
Studs, and Sems with
Regular Height Nuts
(SAE J995 Grade 2 or
Stronger Nuts)
SAE Grade 8 Bolts, Screws,
Studs, and Sems with
Regular Height Nuts
(SAE J995 Grade 2 or
Stronger Nuts)
in-lb in-lb N∙cm in-lb N∙cm in-lb N∙cm
# 6 - 32 UNC 15 ± 2 169 ± 23 23 ± 3 262 ± 34
# 6 - 40 UNF
10 ± 2 13 ± 2 147 ± 23
17 ± 2 192 ± 23 25± 3 282 ± 34
# 8 - 32 UNC 29 ± 3 328 ± 34 41± 5 463 ± 56
# 8 - 36 UNF
13 ± 2 25 ± 5 282 ± 56
31 ± 4 350 ± 45 43 ± 5 486 ± 56
# 10 - 24
UNC
42 ± 5 475 ± 56 60 ± 6 678 ± 68
# 10 - 32
UNF
18 ± 2 30 ± 5 339 ± 56
48 ± 5 542 ± 56 68± 7 768 ± 79
1/4 - 20 UNC 48 ± 7 53 ± 7 599 ± 79 100 ± 10 1130 ± 113 140 ± 15 1582 ± 169
1/4 - 28 UNF 53 ± 7 65 ± 10 734 ± 113 115 ± 12 1299 ± 136 160 ± 17 1808 ± 192
5/16 - 18
UNC
115 ± 15 105 ± 15 1186 ± 169 200 ± 25 2260 ± 282 300 ± 30 3390 ± 339
5/16 - 24
UNF
138 ± 17 128 ± 17 1146 ± 192 225 ± 25 2542 ± 282 325 ± 33 3672 ± 373
ft-lb ft-lb N∙m ft-lb N∙m ft-lb N∙m
3/8 - 16 UNC 16 ± 2 16 ± 2 22 ± 3 30 ± 3 41 ± 4 43 ± 5 58 ± 7
3/8 - 24 UNF 17 ± 2 18 ± 2 24 ± 3 35 ± 4 47 ± 5 50 ± 6 68 ± 8
7/16 - 14
UNC
27 ± 3 27 ± 3 37 ± 4 50 ± 5 68 ± 7 70 ± 7 95 ± 9
7/16 - 20
UNF
29 ± 3 29 ± 3 39 ± 4 55 ± 6 75 ± 8 77 ± 8 104 ± 11
1/2 - 13 UNC 30 ± 3 48 ± 7 65 ± 9 75 ± 8 102 ± 11 105 ± 11 142 ± 15
1/2 - 20 UNF 32 ± 4 53 ± 7 72 ± 9 85 ± 9 115 ± 12 120 ± 12 163 ± 16
5/8 - 11 UNC 65 ± 10 88 ± 12 119 ± 16 150 ± 15 203 ± 20 210 ± 21 285 ± 28
5/8 - 18 UNF
75 ± 10 95 ± 15 129 ± 20 170 ± 18 230 ± 24 240 ± 24 325 ± 33
3/4 - 10 UNC 93 ± 12 140 ± 20 190 ± 27 265 ± 27 359 ± 37 375 ± 38 508 ± 52
3/4 - 16 UNF 115 ± 15 165 ± 25 224 ± 34 300 ± 30 407 ± 41 420 ± 43 569 ± 58
7/8 - 9 UNC 140 ± 20 225 ± 25 305 ± 34 430 ± 45 583 ± 61 600 ± 60 813 ± 81
7/8 - 14 UNF 155 ± 25 260 ± 30 353 ± 41 475 ± 48 644 ± 65 667 ± 66 904 ± 89
Note: The torque values must be reduced when installing the fasteners into
threaded aluminum or brass. The specified torque value should be determined
based on the aluminum or base material strength, fastener size, length of thread
engagement, etc.
Note: The nominal torque values listed above for Grade 5 and 8 fasteners are
based on 75% of the minimum proof load specified in SAE J429. The tolerance
is approximately ± 10% of the nominal torque value. The thin height nuts include
jam nuts.
Note: Reduce the torque values listed in the table above by 25% for lubricated
fasteners. Lubricated fasteners are defined as threads coated with a lubricant,
such as engine oil, or a thread sealant, such as Loctite.
Specifications and Maintenance: Torque Specifications Page 2–6 Groundsmaster 7210
16222SL Rev C