Snap-on CAT3 - page 108

TORQUE TOOLS
108
C
OMMON
T
ORQUE
A
BBREVIATIONS
F
OOT
P
OUNDS
FT
.
LBS
.
I
NCH
P
OUNDS
IN
.
LBS
.
I
NCH
O
UNCES
IN
.
OZS
.
N
EWTON
M
ETER
– N
M
C
ENTI
-N
EWTON
M
ETER
C
N
M
M
ETER
K
ILOGRAM
– M
KG
E
ASY
-
TO
-
USE
T
ORQUE
C
ONVERSION
T
ABLE
T
O
C
ONVERT
M
ULTIPLY
F
ROM
T
O
BY
IN
.
OZ
.
IN
.
LB
.
0.0625
IN
.
LB
.
IN
.
OZ
.
16
IN
.
LB
.
FT
.
LB
.
0.08333
IN
.
LB
.
CMKG
1.1519
IN
.
LB
.
M
KG
0.011519
IN
.
LB
.
N
M
0.113
IN
.
LB
.
D
N
M
1.13
FT
.
LB
.
IN
.
LB
.
12
FT
.
LB
.
M
KG
0.1382
FT
.
LB
.
N
M
1.356
D
N
M
IN
.
LB
.
0.885
D
N
M
N
M
0.10
N
M
D
N
M
10
N
M
CMKG
10.2
N
M
M
KG
0.102
N
M
IN
.
LB
.
8.85
N
M
FT
.
LB
.
0.7376
CMKG
IN
.
LB
.
0.8681
CMKG
N
M
0.09807
M
KG
IN
.
LB
.
86.81
M
KG
FT
.
LB
.
7.236
M
KG
N
M
9.807
• All mechanical torque wrenches are calibrated from 20% to 100% of full scale, therefore,
they should never be used below or above those limits
• To determine which torque wrench capacity is best suited for an application, many
factors must be considered. However, as a recommendation, use a torque wrench in the
middle 50% of the overall capacity of the tool. This will result in longer tool life, ease of
use for the operator and increased accuracy from “clicker” type torque wrenches
• Always grasp handle firmly in the center of the grip
• Approach final torque slowly and evenly
• Stop pulling wrench immediately when target torque is reached
• Never use a torque wrench to break fasteners loose
• Should be cleaned and stored properly
• Should always be stored at it’s lowest torque setting
• Wrenches should be re-calibrated if dropped. Should never be used in excess of
it’s capacity
• Torque wrenches should be “exercised” a minimum of three times at 100% of full scale
before use
• The wrench selected should be calibrated in the same torque units that are specified
• Use of a “cheater bar” will result in an inaccurate reading and can possibly damage
the wrench
• Torque wrenches will last longer if reasonable care is taken. Always unwind handle
to the lowest setting after each use. Do not attempt to lubricate the internal torque
mechanism. Clean torque wrench by wiping, do not immerse. The wrench should be
sent to a qualified calibration lab once every year or every 5000 cycles for re-calibration
TORQUE WRENCH USAGE
These precautions should always be taken when using any torque wrench to
avoid possible injury:
• Read instruction manual completely before using torque wrench.
• Safety glasses or goggles should be worn at all times when using any hand tool.
• Always pull, DO NOT PUSH, to apply torque and adjust your stance to prevent a fall.
• A “cheater bar” should NEVER be used on a torque wrench to apply excess leverage.
• Do not use with sockets or fasteners showing wear or cracks.
• Ratchet mechanism may slip or break if dirty, mismatched or worn parts are used.
• Make sure direction lever is fully engaged
Need help educating your department or shop staff on why applying the correct torque
is critical to proper assembly or maintenance operations? CDI's
Torque Wrench 101
is the perfect simple and quick-read reference "textbook" to train staff on what torque
is, why it's important, torque wrench applications, proper torque wrench selection, and
much more. It's a 4-page laminated reference card, item #T101CDIUSER, and available
from your Snap-on Industrial Brands representative.
TORQUE WRENCH SAFETY
TORQUE 101
FACTS
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