Torque Specification - Craftsman ZT 7000 Manual Del Operador

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Common Hardware Types
Hex Head Capscrew
Carriage Bolt
Washer
Lockwasher
O Hex Nut
Standard Hardware Sizing
When a washer or nut is identified as 1/2", this is the
Nominal size, meaning the inside diameter is 1/2 inch; if a
second number is present it represent the threads per inch
When bolt or capscrew is identified as 1,/2 - 16 x 2", this
means the Nominal size, or body diameter is 1/2 inch; the
second number represents the threads per inch (16 in this
example, and the final number is the body length of the
bolt or screw (in this example 2 inches long).
The guides and ruler furnished below are designed to
help you select the appropriate hardware and tools.
m_b
=4
m_
Nut, 1/2"
Inside
Diameter
Screw, 1/2 x 2-- -
Diameter/ ) /
I B°dYL_ /
Torque Specification Chart
FORSTANDARDMACHINEHARDWARE(Tolerance _+ 20%)
Hardware
Grade
SizeOf
Hardware
8-32
8-36
10-24
10-32
1/4-20
1/4-28
5/16-18
5/16-24
3/8-16
3/8-24
7/16-14
7/16-20
1/2-13
1/2-20
9/16-12
9/16-18
5/8-11
5/8-18
3/4-10
3/4-16
7/8-9
7/8-14
1-8
1-12
©
SAEGrade2
O
SAEGrade5
©
SAEGrade8
in/Ibs in/Ibs in/I hs
ft/Ihs Nm. ft/Ibs Nm. ft/Ihs
19 2.1
20 2.3
27 3.1
31 3.5
66 7.6
76 8.6
11 15.0
12 16.3
28 27.2
23 31.3 35
38 40.8 58
35 47.6 55
50 68.0 75
55 74.8 98
65 88.4 110
75 102.0 128
gO 122.4 158
166 136 188
166 217.6 268
186 244.8 386
146 190.4 466
155 210.8 446
226 299.2 588
246 326.4 646
30 3.4 41
31 3.5 43
43 4.9 60
49 5.5 68
8 10.9 12
10 13.6 14
17 23.1 25
19 25.8 27
38 40.8 45
47.6 50
68.0 70
74.8 86
102.0 116
122.4 126
149.6 156
163.2 178
204.0 220
244.8 240
353.6 386
408.0 420
544.0 686
598.4 666
788.8 960
870.4 1,000
NOTES
NITI.
4.6
4.9
6.8
7.7
16.3
19.0
34.0
34.0
61.2
68.0
95.2
108.8
149.6
163.2
204.0
231.2
299.2
326.4
525.0
571.2
816.0
897.6
1,244.0
1,360.0
1. These torque values are to be used for all hardware
excluding: Iocknuts, self-tapping screws, thread forming
screws, sheet metal screws and socket head setscrews.
2. Recommended seating torque values for Iocknuts:
a. for prevailing torque Iocknuts - use 65% of grade 5
torques.
b. for flange whizlock nuts and screws - use 135% of
grade 5 torques.
3. Unless otherwise noted on assembly drawings, all torque
values must meet this specification.
Wrench & Fastener Size Guide
1/4" Bolt or Nut 5/16" Bolt or Nut
Wrench--7/16" Wrench--I/2"
3/8" Bolt or Nut
Wrench--9/16"
7/16" Bolt or Nut
Wrench (Bolt)--5/8"
Wrench (Nut)--11/16"
1/2" Bolt or Nut
Wrench--3/4"
PTS - 34