Specifications And Maintenance; Standard Torque Values (Inch); Standard Torque Values (Metric Fasteners) - Toro SnowMaster Manual

SPECIFICATIONS AND MAINTENANCE

Standard Torque Values (Inch)

Grade 1, 5, &
Thread Size 8 with Thin
Height Nuts
In-lb
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
7/16-14 UNC 27 ± 3
7/16-20 UNF 29 ± 3
1/2-13 UNC 30 ± 3
1/2-20 UNF 32 ± 3
5/8-11 UNC 65 ± 10
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

Standard Torque Values (Metric Fasteners)

Thread Size
M5 X 0.8
M6 X 1.0
M8 X 1.25
M10 X 1.5
M12 X 1.75
M16 X 2.0
M20 X 2.5
INCH/METRIC 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 .
INCH/METRIC NOTE: Torque values
may have to be reduced when installing
fasteners into threaded aluminum or
brass. The specific torque value should be
2-2 Table of Contents
SAE Grade 1 Bolts
In-lb N-cm
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
Class 8.8 Bolts
57 ± 5 in-lb
96 ± 10 in-lb 1085 ± 113 N-cm
19 ± 2 ft-lb
38 ± 4 ft-lb
66 ± 7 ft-lb
166 ± 15 ft-lb
325 ± 33 ft-lb
determined based on the fastener size, the
aluminum or base material strength, length
of thread engagement, etc.
INCH/METRIC 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. Thin height nuts
include jam nuts.
SAE Grade 5 Bolts
In-lb
100 ± 10 1125 ± 100
115 ± 10 1300 ± 100
200 ± 25 2250 ± 280
225 ± 25 2540 ± 280
ft-lb
30 ± 3
35 ± 3
50 ± 5
55 ± 5
75 ± 8
85 ± 8
150 ± 15
170 ± 15
265 ± 25
300 ± 25
430 ± 45
475 ± 45
644 ± 68 N-cm
26 ± 3 N-m
52 ± 5 N-m
90 ± 10 N-m
225 ± 23 N-m
440 ± 45 N-m
Toro® - SnowMaster® Service Manual
SAE Grade 8 Bolts
N-cm In-lb
140 ± 15
160 ± 15
300 ± 30
325 ± 30
N-m ft-lb
41 ± 4 43 ± 4
47 ± 4 50 ± 4
68 ± 7 70 ± 7
75 ± 7 77 ± 7
102 ± 11 105 ± 10
115 ± 11 120 ± 10
203 ± 20 210 ± 20
230 ± 20 240 ± 20
359 ± 34 374 ± 35
407 ± 34 420 ± 35
583 ± 61 600 ± 60
644 ± 61 660 ± 60
Class 10.9 Bolts
78 ± 8 in-lb
133 ± 14 in-lb 1503 ± 158 N-cm
28 ± 3 ft-lb
54 ± 6 ft-lb
93 ± 10 ft-lb
229 ± 23 ft-lb
450 ± 36 ft-lb
METRIC NOTE: The nominal torque
values listed above are based on 75% of
the minimum proof load specified in SAE
J1199. The tolerance is approximately ±
10% of the nominal torque value. Thin
height nuts include jam nuts.
N-cm
1580 ± 170
1800 ± 170
3390 ± 340
3670 ± 340
N-m
58 ± 5
68 ± 5
68 ± 9
104 ± 9
142 ± 14
163 ± 14
285 ± 27
325 ± 27
508 ± 47
569 ± 47
813 ± 81
895 ± 81
881 ± 90 N-cm
38 ± 4 N-m
73 ± 8 N-m
126 ± 14 N-m
310 ± 31 N-m
610 ± 62 N-m