Toro 38754, Руководство по обслуживанию

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Standard Torque for Dry, Zinc Plated, and Steel Fasteners (Inch Series)
Thread Size Grade 1,
5, & 8
Fasteners
with Thin
Height Nuts
SAE Grade 1 Bolts, Screws,
Studes & Sems with
Regular Height Nuts (SAE
Grade 2 or Better Nut)
SAE Grade 5 Bolts, Screws,
Studs & Sems with Regular
Height Nuts (SAE Grade
5 or Better Nut)
SAE Grade 8 Bolts, Screws,
Studs & Sems with Regular
Height Nuts (SAE Grade
8 or Better Nut)
in-lb in-lb N • cm in-lb N • cm in-lb N • cm
#6-32 UNC 15 ± 2 169 ± 23 23 ± 3 260 ± 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 ± 30
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 1446 ± 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: Reduce torque values listed in the table above by 25% for lubricated fasteners. Lubricated
fasteners are defined as threads coated with a lubricant such as oil, graphite, or thread sealant such
as Loctite.
Torque values my have to be reduced when installing fasteners into threaded aluminum or brass. The
specific torque value should be determined based on the fastener size, the aluminum or base material
strength, length of thread engagement, etc.
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.
Thin nuts include jam nuts.
POWER CLEAR® 721/821 Snowthrower Service Manual Page 2–5 Specifications and Maintenance: Torque Specifications
3438-776 Rev A