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GC0619-ISS 3
1/4” SQUARE DRIVE TORQUE WRENCH
Model No: CHT674 / P ART NO: 1801674
Thank you for purchasing this CLARKE Torque Wrench.
This torque wrench is designed to tighten nuts with precision. It should NOT be used for
UNDOING nuts as severe damage could occur. With correct use, this torque wrench is
accurate to ± 4%. With careful use, the torque wrench will give years of reliable service. If
however, you encounter problems, return the unit to your local CLARKE dealer.
GUARANTEE
This product is guaranteed against faulty manufacture for 12 months from the purchase
date. Keep your receipt as proof of purchase. This guarantee is invalid if the product is found
to have been abused or tampered with in any way, or not used for its intended purpose.
Faulty goods should be returned to their place of purchase, no product can be returned to
us without prior permission. This guarantee does not effect your statutory rights.
Note: DO NOT use knuckle or universal joints, as these could result in inaccurate torque
settings.
TORQUE SETTING ADJUSTMENT
1. Loosen the lock nut on the bottom of the
torque wrench by turning it anti-clockwise.
2. Set the required torque by turning the
knurled handle.
• Read the scale from the centreline adding
on the number on the knurled handle.
3. Finally, tighten lock nut to secure the
setting.
4. To loosely install or remove nuts without the
torque facility, move the ratchet selection
switch to the required side.
Note: The wrench cannot be used to tension
left-handed threads.
Centreline
Showing
14 Nm
Knurled
Handle
TIGHTENING USING THE TORQUE WRENCH
1. Place the square drive on to the socket or extension bar, perpendicular to the nut/bolt
to be tightened.
2. Gripping the knurled handle with one hand, whilst steadying the square drive end with
the other, gently but firmly, pull the handle (i.e. in a clockwise direction) until a click is
heard and a slight ‘break’ in the handle is felt. DO NOT turn any further.
IMPORTANT
• Do not jerk the torque wrench in any way to tighten a nut. Apply an even pressure
throughout the operation.
• Release the wrench immediately the click is heard/felt.
• It should be noted that the ‘click’ from the mechanism becomes weaker with the lower
torque settings.
• Do not turn handle below lowest torque setting.
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MAINTENANCE
If the torque wrench has not been used for some time, operate it several times to
allow the lubricant to re-coat the internal working parts.
• After use, return the adjustment to the lowest torque setting, i.e. it’s resting
position. This will remove all strain from the mechanism.
• Clean the wrench by wiping. Never immerse it in any type of cleaning fluid.
• The wrench has been calibrated at the factory order to ensure accurate
readings and should not require any re-calibration. If inaccuracy is
suspected, contact your local Clarke dealer.
CONVERSION TABLES
Foot Kilogram Newton Newton Foot Kilogram Kilogram Newton Pounds
Pounds Metres Metres Metres Pounds Metres Metres Metres Feet
(lb.ft) kgm Nm Nm (lb.ft) kgm kgm Nm (lb.ft)
--- --- ---- 5 3.69 0.51 0.5 4.90 3.61
5 0.69 6.78 10 7.38 1.02 1 9.81 7.23
10 1.38 13.56 20 14.75 2.04 2 19.61 14.47
15 2.07 20.34 30 22.13 3.06 3 29.42 21.70
20 2.76 27.12 40 29.50 4.08 4 39.23 28.93
25 3.46 33.90 50 36.88 5.10 5 49.04 36.17
CONVERSION FORMULAE
1 kg cm = 13.887oz/in 1 Nm = 141.61 oz/in
1 kg cm = 0.8677 lb/in 1 Nm = 8.8507 lb/ft
1 kgm = 7.233 lb/ft 1 Nm = 0.73756 lb/ft
1 kg cm = 0.098 Nm 1 kgm = 9.80665 Nm
SPECIFICATION
Operating Range 5-25 Nm
Accuracy +/- 4%
Micrometer Increment 0.1 Nm
Drive Shank Size 1/4”
Surface Finish Nickel/Chrome plated
Length 275 mm
Weight 0.6 kg
PARTS & SERVICE:0208 988 7400
E-mail: [email protected] or [email protected]
SALES: UK 01992 565333 or Export 00 44 (0) 01992 565335
Clarke International, Hemnall St, Epping, Essex CM16 4LG
www.clarkeinternational.com
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