Clarke CHT204 User manual

ThankyouforpurchasingthisCLARKETorqueWrench.
Thistorquewrenchisdesignedtotightennutswithprecision.ItshouldNOTbeusedforUNDOINGnuts,asseveredamage
couldoccur.Withcorrectuse,thistoolwillproduceanaccuracyofplusorminus4%.Youcanhearandfeelwhenthe
desiredtorquesettinghasbeenreached.Withcarefulandconsiderateuse,thewrenchwillgiveyearsofreliableservice.
GUARANTEE
This product is guaranteed against faults in manufacture for 12 months from purchase date. Keep your
receipt as proof of purchase. This guarantee is invalid if the product has been abused or tampered with in
any way, or not used for the purpose for which it is intended. The reason for return must be clearly stated.
This guarantee does not affect your statutory rights.
OPERATION
A. Torque Setting Adjustment
The main body is marked in both Inch Pounds (in lbs), and Metre Kilograms (Mkg).
The barrel is marked with 20 graduations, one graduation = 12 in lbs or 0.14 Mkg.
Example: To set the torque to 492 in lbs
1. Ensure the lock nut is loosened, by turning it anti-clockwise. Turn the knurled handle until one of the
the zero marks on the chamfered scale is exactly in line with the next lowest graduation on the linear
scaleon themain body- inthis caseit wouldbe 480.(only oneof thezero markswill lineup correctly)
2. As the desired setting is higher than 480, continue to turn the knurled handle, one more graduations.
(one graduation equals12 in lbs). Therefore 480+12=492 in lbs
3. Finally, tighten lock nut to secure the setting.
B. Method of Use
Note: Preferably, DO NOT use knuckle or universal joints, as these could result in incorrect torque settings.
1. Placethesquare driveontothe socketorextensionbar, perpendiculartothenut/bolt tobetightened.
2. Gripping the knurled handle with the right hand, whilst steadying the 3/8” square drive end with the
left, 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. IMPORTANT! DO NOT turn any further.
IMPORTANT
1. Do not jerk the torque wrench in any way to tighten a nut. Apply even pressure throughout the operation.
2. Release the wrench immmediately the click is heard/felt.
3. It should be noted that the ‘click’ becomes weaker with the lower torque settings.
ACCESSORIES
1. 1/2" Square Drive, x 5" Extension bar.
2. 1/2" x 3/8" Square Drive adaptor.
3. Carrying Case
3/8” SQUARE DRIVE TORQUE WRENCH
MODEL: CHT204 0504

MAINTENANCE
Each torque wrench has been lubricated before leaving the factory. If the torque wrench has not been
used for some time, operate it several times allowing the lubricant to re-coat the internal working parts.
• After use, keep adjustment at lowest torque setting.
• Do not turn handle below lowest torque setting.
• Clean wrench by wiping. Never immerse in any type of cleaning fluid.
• Thewrench mayoccasionally requireservicing/recalibration inordertoensureaccurate readings,
in which case, contact your CLARKE dealer
CONVERSION DATA
1kg cm = 13.887in oz 1dNm = 14.161in oz
1kg cm = 0.08677in lbf 1Nm = 8.8507in lbf
1kgm = 7.233ft lbf 1Nm = 0.73756 ft lbf
1kg cm = 0.098Nm 1kg cm = 9.80665 Nm
Foot Kilogram Newton Newton Foot Kilogram Kilogram Newton Foot
Pounds Metres Metres Metres Pounds Metres Metres Metres Pounds
(ft.lbf) kgm Nm Nm (ft.lbf) kgm kgm Nm (ft.lbf)
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
30 4.15 40.68 60 44.26 6.12 6 58.84 43.40
35 4.84 47.46 70 51.63 7.14 7 68.65 50.63
40 5.53 54.24 80 59.01 8.16 8 78.46 47.87
45 6.22 61.02 90 66.38 9.18 9 88.26 65.10
50 6.91 67.80 100 73.76 10.20 10 98.07 72.33
55 7.60 74.58 110 81.14 11.22 11 107.88 79.57
60 8.29 81.36 120 88.51 12.24 12 117.68 86.80
65 8.98 88.14 130 95.89 13.26 13 127.49 94.03
70 9.67 94.92 140 103.26 14.28 14 137.30 101.27
75 10.37 101.70 150 110.64 15.30 15 147.11 108.50
80 11.06 108.48 160 118.02 16.32 16 156.91 115.74
85 11.75 115.26 170 125.39 17.34 17 166.72 122.97
90 12.44 122.04 180 132.77 18.36 18 176.53 130.20
95 13.13 128.82 190 140.14 19.38 19 186.33 137.43
100 13.82 135.60 200 147.52 20.40 20 196.14 144.67
105 14.51 142.38 210 154.90 21.42 21 205.95 151.90
110 15.20 149.16 220 162.27 22.44 22 215.75 159.13
115 15.89 155.94 230 169.65 23.46 23 225.37 166.37
120 16.58 162.72 240 177.02 24.48 24 235.37 173.60
125 17.28 169.50 250 184.40 25.50 25 245.18 180.84
130 17.97 176.28 260 191.78 26.52 26 254.98 188.08
135 18.66 183.06 270 199.15 27.54 27 264.79 195.30
140 19.35 189.84 280 206.53 28.56 28 274.60 202.54
145 20.04 196.62 290 213.91 29.58 29 284.41 209.77
150 20.73 203.40 300 221.29 30.60 30 294.22 217.00
155 21.42 210.18 310 228.67 31.62 31 304.03 224.23
160 22.11 216.96 320 236.05 32.64 32 313.84 231.46
CONVERSION TABLES
Clarke International, Hemnall St., Epping, Essex CM16 4LG: Service Tel: [phone]