R44AR
Ratchet Head
Repair Kit R44AR-RK
TQR400-6
Torque Body Extension
TQR600-6
Torque Body Extension
A10C4D600F
Adaptor
TQN553 (TQR400)
Torque Body
TQN552 (TQR600)
Torque Body
TQN554 (TQRM80)
Torque Body
TQR600C Shown
USER’S MANUAL
Introduction
Snap-on TQ-series torque wrenches are precision
measurement tools, designed to torque in the clockwise
direction and guaranteed within 4% of the setting from 20%
of full scale to full scale.
An innovative “split beam” torque measuring mechanism
provides consistent accuracy throughout the torque setting
range. Because no coil spring is used, there is no need to
“work-in” a TQ-series torque wrench before using it the first
time during a work period. Nor is it necessary to adjust to the
lowest torque setting after use.
In use, the wrench clicks and provides a few degrees of free
movement when the desired torque is reached. When
pressure on the wrench is completely released, the wrench
automatically resets for the next application.
•
Setting torque on adjustable wrenches is fast and easy
because there is no spring tension on the set knob.
•
Torque setting is lockable for repetitive applications.
•
The wrench length is designed to provide the leverage
required for maximum torque applications. The length also
provides the needed reach for those-hard-to-get-at places.
•
The torque wrenches are chrome plated for appearance
and easy cleanup, and knurled handles help to provide a
slip resistant grip.
Equipment & Testing Tips
This torque wrench will torque in the
clockwise
direction only
. Do not use to break fasteners loose
without first detaching the wrench’s Torque Body. Use of an
appropriate wrench or breaker bar and socket is
recommended.
Position of force application is critical to torque
measurement. The torque wrench must be pulled at the
center of the hand grip to assure accuracy.
There is no need to “work in” the wrench before using it
the first time during a work period;
nor
is it necessary to reset
it to its lowest setting when it is not being used.
After setting the torque with the set knob, snap the lock
lever in place to protect the knob from being accidentally
moved. This will also hold the setting for repetitive
applications.
To convert Newton•metre (N•m) to lb.ft., refer to the
conversion chart located above the scale window.
Periodic re-calibration may be necessary to ensure
accurate torque readings.
To protect the wrench when not in use, disassemble and
store it in the protective box.
To Assemble
Connect the components together according to the
illustration with the ratchet square drive on the opposite side
from the calibration dial. Make sure locking pins are fully
engaged with mating pin holes.
To Torque Fasteners
Pull back the set knob lock lever to exposed the set knob.
Turn the set knob until the desired torque is aligned with the
set mark in the scale window. Move the lock lever back over
the set knob to lock the torque setting.
Using the proper hand hold position (center of grip),
tighten the fastener with a smooth pulling action in the
clockwise direction. At the preset torque, a click will be heard
as the wrench releases –
stop pulling
.
When you completely release pressure, the wrench
automatically resets for the next application.
Safety Warnings and Cautions
The torque wrench must be assembled as illustrated with
the ratchet square drive on the opposite side from the
calibration dial. Failure to do this will not allow the
mechanism to release in the clockwise direction.
Caution: Do not use torque wrench to break tight fasteners
loose. This can damage the tool and result in inaccurate
settings.
Overtorquing can cause breakage.
Do not exceed the capacity of the Torque Wrench.
The sealed ratchet mechanism should be inspected
periodically. Do not use a ratchet that has a damaged,
worn or dirty ratchet mechanism. When replacing
damaged or worn parts, use entire contents of the Service
Kit available from Snap-on representative.
To protect yourself from injury when applying force with
this wrench, always make sure the ratchet reverse lever is
fully engaged in the on position and that the socket is
properly seated on the nut or bolt. Pull (do not push) on
the wrench handle and adjust your stance accordingly.
A wrench that is slipping can cause accidents.
On detachable wrenches, make sure the spring-loaded
locking pins that secure sections of the wrench are fully
engaged in their locking pin holes.
Specifications
Torque Ranges
TQR400A
Maximum Torque Setting 400 lb.ft.
Minimum torque Setting 130 lb.ft.
Torque Setting Increments 10 lb.ft.
TQR600C
(shown)
Maximum Torque Setting 600 lb.ft.
Minimum torque Setting 200 lb.ft.
Torque Setting Increments 10 lb.ft.
TQRM80C
(metric reading)
Maximum Torque Setting 80 kg•m
Minimum torque Setting 26 kg•m
Torque Setting Increments 2 kg•m
Accuracy*
(of setting)
±4%
Ratchet Head
Style Reversible
Square Drive Size ¾”
Number of Teeth 32
Ratcheting Reengagement 12° Swing
Length
400 600 & 80
Overall 34“ 48.50”
Torque Body 20.50” 20.50”
Torque Body Extension 8.75“ 23.25”
Weight
(lbs) 8.85 11.50
* Orientation of this torque wrench will
affect the operation. The torque wrench is
calibrated in a “neutral” position (weight of
the wrench does not add to or subtract from
the torque). In this orientation, the accuracy
will be within ±4% of setting. When used in
any
other orientation, the accuracy will be
within ±5% of full scale.
Snap-on Tools
Kenosha, WI 52140-1410
IN1199
Rev.B
Printed in
U.S.A.
