Christie VC-RAD 31 User manual

ELECTRICALLY OPERATED TORQUE WRENCH
(VC-RAD)
USER GUIDE
Ref: WCOI.055 Issue: 5 Date: June 2015

1
CONTENTS
Page Description
1 Introduction
2 Training Requirements
General Safety
3 Accessories Available
VC-RAD Wrench Features
4 Torque Reaction
5 Safe Reaction Zone
6 Setting Torque For Bolt Tightening
Setting Torque For Bolt Loosening
7 Operating The Wrench
Maintenance And Recalibration
8 E.C. Declaration of Conformity
-- Calibration Certificate
INTRODUCTION
The VC-RAD Electric torque wrench is a handheld electrically driven power tool intended to tighten and
un-tighten nuts, bolts and threaded fasteners.
The VC-RAD Electrical torque wrench must always be used with the following:-
240V or 110V electrical power supply (dependant on model purchased)
Impact Quality Sockets
Ring and pin fastener system (or similar)
Reaction Arm
It is the responsibility of the user to consider associated site risks before introducing the equipment into
the work-place.

2
TRAINING REQUIREMENTS
Training on the correct use of the VC-RAD Electric Torque Wrench is available. Please contact W-
Christie (Industrial) for more information.
GENERAL SAFETY
The improper use of the VC-RAD electric torque wrench is unsafe an may result in personal injury. It is
important that operators have read, understood and comply with all instructions in this user guide.
Operators must be equipped with the following personal protective equipment (PPE):
Eye Protection (Safety Glasses / Goggles)
Safety Footwear (Steel Toe Cap Boots)
Heavy Gloves
Impact quality sockets must be secured to the tool square drive by means of a ring and pin combination.
Only use VC-RAD wrenches with impact quality sockets. Do not use with extension bars or universal
joints.
Do not use in the presence of explosive gases or liquids - fire/explosion hazard
Only use VC-RAD wrench with 240v or 110v electrical power supply (dependant on model purchased)
To prevent entanglement with rotating parts operators must not wear loose clothing, ties, jewellery etc…
Long hair must be tied back.
Always keep hands, fingers and body parts clear of the reaction arm at all times. Trapping in this area can
result in serious personal injury.
All Electrical equipment and ancillary products should be inspected for damage and irregularities prior to
use. If in doubt do not use.
VC-RAD WRENCH MODELS COVERED BY MANUAL
Model
Weight
(Kg)
Speed (RPM)
Torque Range (Nm)
Square Drive
Single
Minimum
Maximum
VC-RAD 1
4.5
76
20
100
3/4"
VC-RAD 6
4.5
21
150
550
3/4"
VC-RAD 10X
5.6
10
230
1000
3/4"
VC-RAD 14
4.9
7
400
1,350
3/4"
VC-RAD 21
6.8
6
700
2,150
1”
VC-RAD 31
6.8
4
1,100
3,100
1”

3
ACCESSORIES AVAILABLE
The following accessories are available upon request and can be custom made to suit requirements. Please
contact W-Christie for more information:-
Special Reactions.
Custom VC-RAD Wrench Lifting points.
Nose Cone Extension.
Offset Gearbox.
Impact Quality Sockets.
VC-RAD WRENCH FEATURES
VC-RAD Wrenches are handheld, reversible, non-impacting torque delivery tools designed primarily to
tighten and un-tighten nuts, bolts and threaded fasteners.
CAUTION ALWAYS KEEP (F) –HAMMER SELECTOR SWITCH
THE DRILL POSITION
DO NOT OPERATE THE WRENCH WITH (F) –HAMMER
SELECTOR SWITCH IN THE HAMMER POSITION.
E - Alpha and Numeric Selectors
F - Hammer Selector Switch
D - Direction Selector Switch (With Neutral Position)
C - Trigger
G - Spline /
Serpentine
H - Output
Square
J - Reaction Arm
I - Spirolox Clip
A - Electrical Cable
(Complete With Plug)
FWD
Rev
Neutral
K - Gearbox
B - Motor



4
TORQUE REACTION
When the Christie VC-RAD wrench is in operation the reaction arm rotates in the opposite direction to
the output square drive and must be allowed to rest squarely against a solid object or surface adjacent to
the bolt to be tightened. (See figure Below).
Ensure the Reaction Arm is NOT resting on a sloping or bevelled face.
SPECIAL NOTICE - TIGHT FASTENERS
When tightening or releasing tight fasteners, the torque required to move the nut may be high enough to
keep the reaction locked in one position. This can cause the reaction plate to bend or cause gearbox
failure. To prevent failure, re-position the reaction plate after every two turns of the fastener, i.e operate
the tool briefly in the opposite direction.
Reaction
Reaction
Reaction
Reaction
Socket
Socket
Clockwise Operation
Counter Clockwise Operation
WARNING:-
Always keep hands clear of the reaction arm when the tool is in use or serious injury will result

5
SAFE REACTION ZONE
Care must be taken to ensure that the reaction arm is only used within the limitations shown in the figure
below. Failure to observe this instruction will result in premature wear or damage to the wrench. Do not
react on the reaction arm vertical crank or inside edge. Extreme forces are created which may cause
damage to the wrench. If the application does not allow the use of a standard reaction arm, non-standard
reaction arms are available.
Customers must not modify reaction arms and are strongly advised to contact W. Christie or their agents
for technical assistance.
TRAPPING HAZARD WARNING:- ALWAYS KEEP HANDS, FINGERS AND BODY PARTS
CLEAR OF THE REACTION ARM WHEN THE TOOL IS IN
USE OR SERIOUS TRAPPING INJURY WILL RESULT.

6
SETTING TORQUE FOR BOLT TIGHTENING
Ensure the direction selector switch (D) is set to forward
Identify the torque required for the bolting application.
-The VC-RAD Wrench comes with a torque calibration certificate. The torque
calibration certificate displays alpha and numeric characters that are dialled in on the
tool that correspond to the torque values to the right. To select a desired torque, dial in
your VC-RAD by using the alpha and numeric selectors (E) on the top of the VC-RAD
wrench.
-For example on the “Sample VC-RAD Calibration Certificate” below to tighten to
730Nm set the Alpha and Numeric Selectors (E) to C,3.
CAUTION: DO NOT ATTEMPT TO RUN THE TOOL WITH SETTINGS THAT ARE NOT
DISPLAYED ON THE TORQUE CHART OR CALIBRATION CERTIFICATE.
FAILURE TO DO SO COULD CAUSE THE TOOL TO FAIL AND VOID YOUR
WARRANTY.
Sample VC-RAD Torque
Calibration Certificate (Nm)
Setting
Torque
B2
380
C2
450
E2
520
F2
590
G2
660
C3
730
D3
800
E3
870
F3
940
G3
1,010
D4
1,080
E4
1,150
C5
1,220
F4
1,290
G4
1,350
SETTING TORQUE FOR BOLT LOOSENING
Ensure the direction selector switch (D) is set to reverse
Set the torque to maximum
-The VC-RAD Wrench comes with a torque calibration certificate. The torque
calibration certificate displays alpha and numeric characters that are dialled in on the
tool that correspond to the torque values to the right. To select a desired torque, dial in
your VC-RAD by using the alpha and numeric selectors (E) on the top of the VC-RAD
wrench.
-For the “Sample VC-RAD Torque Calibration Certificate” shown above the maximum
torque is G,4
E - Alpha and
Numeric Selectors
D - Direction Selector Switch
(With Neutral Position)
FWD
Rev
Neutral
C - Trigger

7
OPERATING THE WRENCH
1. Fit the wrench with the correct size impact socket to suit the bolt to be tightened and retain with
ring and pin system.
2. Rotate the handle to convenient position relative to the reaction arm.
3. Fit the tool onto the bolt to be tightened with the reaction arm adjacent to the reaction point (See
“Torque Reaction” Page)
4. Move the direction selector switch (D) from the neutral position and into either forward or reverse
as required.
5. Squeeze the trigger (C) to bring the reaction arm into contact with the reaction point.
6. Fully press the trigger (C) and keep pressed until the tool stalls (when tightening) or the fastener is
released (when un-tightening). If the trigger is released before the wrench stalls, full torque will
not be applied to the bolt. Once the motor stalls do not “blip” the trigger, or incorrect torque will
be applied.
IMPORTANT: IF A FASTENER WILL NOT UN-TIGHTEN WHEN THE TOOL IS SET TO
MAXIMUM, DO NOT “BLIP” THE TRIGGER, USE TOOLING OF HIGHER
TORQUE OUTPUT.
7. Release the soft start trigger (C) and remove tool from bolt.
CAUTION: IN USE THIS TOOL MUST BE SUPPORTED AT ALL TIMES IN ORDER TO
PREVENT UNEXPECTED RELEASE OF A FASTENER OR COMPONENT
FAILURE.
IMPORTANT: IF BREAKDOWN, MALFUNCTION OR DAMAGE OCCURS DO NOT
ATTEMPT TO REPAIR, CONTACT W. CHRISTIE (IND) LTD
IMMEDIATELY.
MAINTENANCE AND RECALIBRATION
To prevent premature failure and ensure confidence in torque supply, it is recommended that this
equipment is serviced and calibrated at least on an annual basis, by W. Christie (Ind) LTD.
There are no user serviceable parts. If any failures occur then the wrench should be returned to W.
Christie (Ind) LTD for evaluation.

8
E.C. DECLARATION OF CONFORMITY
MODELS COVERED: VC-RAD 1 VC-RAD 6, VC-RAD 10X,
VC-RAD 14, VC-RAD 21, VC-RAD 31
DESCRIPTION: Electrical Torque Wrench
We hereby declare that the following machinery complies with the essential health and safety
requirements of the European Machinery Directive 2006/42/EC published on the 9th June 2006
W Christie (Ind) Ltd, Meadowbank Road, Rotherham S61 2NF, United Kingdom.
This machinery has been designed and manufactured in accordance with the following transposed
harmonised European Standard:-
BS EN ISO 12100-2:2003 Safety of Machinery –Technical Principles
BS EN 60745-1:2006 Hand-held Motor Operated Electric Tools –Safety –General Requirements
SIGNED: POSITION: Senior Applications Engineer
NAME: R. G. Askham
On behalf of W Christie (Ind) Ltd