Torque Specification - Craftsman ZT 7000 Manual Del Operador

|US
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_3
Nut, 1/2"
_ inside
Diameter
Screw, 1/2 x 27
.o0../ k//
D"meter/ 711
I B°dyZ_____I /
Torque Specification Chart
FORSTANDARDMACHINEHARDWARE(Tolerance _+ 20%)
Hardware _ 0
Grade
SAEGrade2 SAEGrade 5
Size Of in/Ibs in/Ibs
Hardware fl/Ibs Nm. fl/Ibs
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
19 2.1
20 2.3
27 3.1
31 3.5
66 7.6
76 8.6
11 15.0
12 16.3
20 27.2
23 31.3
30 40.8
35 47.6
50 68.0
55 74.8
65 88.4
75 102.0
00 122.4
100 136
166 217.6
186 244.8
146 190.4
155 210.8
226 299.2
246 326.4
30
31
43
49
8
10
17
19
36
35
56
55
75
90
110
126
156
180
260
306
406
440
586
640
NOTES
©
SAEGrade 8
in/Ibs
Nm. _/Ibs Nm.
3.4 41 4.6
3.5 43 4.9
4.9 60 6.8
5.5 68 7.7
10.9 12 16.3
13.6 14 19.0
23.1 25 34.0
25.8 27 34.0
40.8 45 61.2
47.6 56 68.0
68.0 70 95.2
74.8 86 108.8
102.0 116 149.6
122.4 126 163.2
149.6 156 204.0
163.2 176 231.2
204.0 226 299.2
244.8 240 326.4
353.6 386 525.0
408.0 420 571.2
544.0 600 816.0
598.4 660 897.6
788.8 906 1,244.0
870.4 1,808 1,360.0
1. These torque values are to be used for all hardware
excluding: Iocknuts, self4apping 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
Wrench--7/16"
5/16" Bolt or Nut
Wrench--l/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 - 39