Manitowoc National Crane 800D User Manual

National Crane Published 5-27-2018 Control # 039-06 5-25
800D SERVICE
Weld Studs
Unless otherwise specified the following grade 2 torque
values (± 10%) apply.
Table 5-13: Weld Stud Torque Values
Using Torque Wrench Extensions
1. Torque wrench extensions are designed to extend the
range or versatility of torque wrenches. Torque wrench
scale readings or limit settings shall be computed with
the following formulas when an extension handle is
employed. The sketch below shows which formula is to
be used, adding “A” or subtracting “A” when calculating
the torque wrench setting.
Ta = Torque required (specified)
TW = Wrench scale reading or limit setting of torque wrench
L = Length of torque wrench in inches (center of drive tang to
handle pivot pin or center of hand grip - extension handles
are considered part of wrench length, when used)
A = Length of adapter extensions in inches.
2. If the offset C/L is not in line with the torque wrench C/L,
then you must measure the distance from the C/L of the
torque wrench to the C/L of the offset by using a square.
Then apply this dimension to the torque wrench setting
formula. See sketch below.
3. If offset is positioned at right angles to the torque
wrench, then the offset will not change the effective
length. Therefore, TW-wrench setting and Ta- applied
torque, will be the same value as if no offset were used.
Stud Size
Torque
No. 10
1/4 in
5/16 in - 18
5/16 in - 24
3/8 in
1/2 in
5/8 in
20 lb-in
4 lb-ft
9 lb-ft
10 lb-ft
14 lb-ft
35 lb-ft
70 lb-ft
TW
Ta L
×
LA+
-----------------
= or TW
Ta L
×
LA–
-----------------
=
THIS SIDE ADD “A”
A
L
TW
Ta
Ta
A
THIS SIDE SUBTRACT “A”
9382
ACTUAL DIMENSION “A”
Fo
r
Reference
Only

Manitowoc National Crane 800D Specifications

General

Brand	Manitowoc
Model	National Crane 800D
Category	Construction Equipment
Language	English