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Published 1-20-2017, Control# 483-02
1-13
CD5515-2/YB5515-2 SERVICE MANUAL
INTRODUCTION
1
NOTE:
If multipliers and/or special tools are used to reach
hard to get at areas, ensure torque readings are
accurate.
Torque wrenches are precision instruments and must be
handled with care. To ensure accuracy, calibrations must be
made on a scheduled basis. Whenever there is a possibility
that a torque wrench may have been either overstressed or
damaged, it should immediately be removed from service
until recalibrated. When using a torque wrench, any erratic or
jerking motion can result in the application of excessive or
improper torque. ALWAYS use a slow, even movement and
STOP when the predetermined value has been reached.
When using step wrenches, calculated wrench settings are
valid only when the following conditions are met:
•
Torque wrenches must be those specified and forces
must be applied at the handle grip. The use of handle
extensions will change applied torque to the bolt.
•
All handles must be parallel to the step wrench during
final tightening. Multiplier reaction bars may be
misaligned no more than 30 degrees without causing
serious error in torque.
•
Multiplier bar handles must be propped or supported
within the outer 1/4 of the handle length, or serious
under or over tightening will occur.
To convert pounds-foot (lb-ft) of torque to newton meters
(Nm), multiply the pounds-foot quantity by 1.3558.
To convert pounds-inch (lb-in) of torque to newton meters
(Nm), multiply the pounds-inch quantity by 0.11298.
Torque Values
The following tables list the torque values for both ASME
standard and metric fasteners. The tables list the values for
grade 5 and grade 8 zinc-flake coated, untreated (black)
finish and stainless steel fasteners.
Table 1-2: UNC (Course) Thread: Torque Values for Zinc-Flake Coated and Untreated Fasteners
NOTE:
Studs shall be torqued using capscrew values when grade is known.
Bolt Diameter - Inches
Torque Values
(Pounds-Foot, Maximum/Minimum)
SAE Grade
1/4
5/16
3/8
7/16
1/2
9/16
5/8
3/4
7/8
1
1-1/8
1-1/4
1-1/2
Zinc-Flake
5
7
14
25
40
61
88
121
213
342
512
636
884
1532
8
10
20
36
57
86
124
171
301
483
723
1032
1433
2488
Untreated
5
9.0
7.7
19
17
32
30
52
48
78
72
114
106
156
144
270
249
416
384
606
560
813
751
1141
1053
2028
1865
8
12.5
11.5
26
24
48
44
73
67
120
110
161
143
234
216
385
355
615
567
929
857
1342
1234
2043
1885
3276
3024
SAE Grade 1
and Grade 2
HHCS
SAE Grade 5
HHCS
SAE Grade 7
HHCS
SAE Grade 8
HHCS
Serrated
Flange Head
Socket Head
Shoulder
Screw
Socket Head
Capscrew
FIGURE 1-9
Reference Only
Содержание Grove YB5515-2
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