Toro TurfMaster HDX 22215 Service Manual page 15

Standard Torque for Dry, Zinc Plated, and Steel Fasteners (Inch Series)
Thread Size Grade 1,
5, & 8
Fasteners
with Thin
Height Nuts
in-lb
#6-32 UNC
10 ± 2
#6-40 UNF
#8-32 UNC
13 ± 2
#8-36 UNF
#10-24 UNC
18 ± 2
#10-32 UNF
1/4-20 UNC 48 ± 7
1/4-28 UNF 53 ± 7
5/16-18 UNC 115 ± 15
5/16-24 UNF 138 ± 17
ft-lb
3/8-16 UNC 16 ± 2
3/8-24 UNF 17 ± 2
27 ± 3
7/16-14 UNC
7/16-20 UNF 29 ± 3
1/2-13 UNC 30 ± 3
1/2-20 UNF 32 ± 4
65 ± 10
5/8-11 UNC
5/8-18 UNF 75 ± 10
3/4-10 UNC 93 ± 12
3/4-16 UNF 115 ± 15
7/8-9 UNC 140 ± 20
7/8-14 UNF 155 ± 25
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.
30 Inch TurfMaster® HDX WPM
3432-730 Rev A
SAE Grade 1 Bolts, Screws,
Studes & Sems with
Regular Height Nuts (SAE
Grade 2 or Better Nut)
in-lb N • cm
13 ± 2 147 ± 23
25 ± 5 282 ± 30
30 ± 5 339 ± 56
53 ± 7 599 ± 79
65 ± 10 734 ± 113
105 ± 15 1186 ± 169
128 ± 17 1446 ± 192
ft-lb N • m
16 ± 2 22 ± 3
18 ± 2 24 ± 3
27 ± 3 37 ± 4
29 ± 3 39 ± 4
48 ± 7 65 ± 9
53 ± 7 72 ± 9
88 ± 12 119 ± 16
95 ± 15 129 ± 20
140 ± 20 190 ± 27
165 ± 25 224 ± 34
225 ± 25 305 ± 34
260 ± 30 353 ± 41
Page 2–5
SAE Grade 5 Bolts, Screws,
Studs & Sems with Regular
Height Nuts (SAE Grade
5 or Better Nut)
in-lb N • cm
15 ± 2 169 ± 23
17 ± 2 192 ± 23
29 ± 3 328 ± 34
31 ± 4 350 ± 45
42 ± 5 475 ± 56
48 ± 5 542 ± 56
100 ± 10 1130 ± 113
115 ± 12 1299 ± 136
200 ± 25 2260 ± 282
225 ± 25 2542 ± 282
ft-lb N • m
30 ± 3 41 ± 4
35 ± 4 47 ± 5
50 ± 5 68 ± 7
55 ± 6 75 ± 8
75 ± 8 102 ± 11
85 ± 9 115 ± 12
150 ± 15 203 ± 20
170 ± 18 230 ± 24
265 ± 27 359 ± 37
300 ± 30 407 ± 41
430 ± 45 583 ± 61
475 ± 48 644 ± 65
Specifications and Maintenance: Torque Specifications
SAE Grade 8 Bolts, Screws,
Studs & Sems with Regular
Height Nuts (SAE Grade
8 or Better Nut)
in-lb N • cm
23 ± 3 260 ± 34
25 ± 3 282 ± 34
41 ± 5 463 ± 56
43 ± 5 486 ± 56
60 ± 6 678 ± 68
68 ± 7 768 ± 79
140 ± 15 1582 ± 169
160 ± 17 1808 ± 192
300 ± 30 3390 ± 339
325 ± 33 3672 ± 373
ft-lb N • m
43 ± 5 58 ± 7
50 ± 6 68 ± 8
70 ± 7 95 ± 9
77 ± 8 104 ± 11
105 ± 11 142 ± 15
120 ± 12 163 ± 16
210 ± 21 285 ± 28
240 ± 24 325 ± 33
375 ± 38 508 ± 52
420 ± 43 569 ± 58
600 ± 60 813 ± 81
667 ± 66 904 ± 89