Clarke CHT141 User manual

USER INSTRUCTIONS

ORIGINAL INSTRUCTIONS GC06/19 iss 5

TORQUE WRENCH

MODEL NO: CHT141

PART NO: 1800141

Parts & Service: 020 8988 7400 / E-mail: Parts@clarkeinternational.com or Service@clarkeinternational.com

INTRODUCTION

Thank you for purchasing this CLARKE ½” square drive 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

wrench will produce an accuracy of plus or minus 3%, and you can hear and

feel when the desired torque setting has been reached. With careful and

considerate use, it will give years of reliable service.

Before attempting to use this product, please read this manual thoroughly and

follow the instructions carefully. In doing so you will ensure the safety of yourself

and that of others around you, and you can look forward to your purchase

giving you long and satisfactory service.

GUARANTEE

This product is guaranteed against faulty manufacture for a period of 12

months from the date of purchase. Please keep your receipt which will be

required 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.

USING YOUR TORQUE WRENCH

TORQUE SETTING ADJUSTMENT

Example: To set the torque to 6.2 kilogram metres (kg/m).

1. Ensure the lock nut (1) is loosened, by turning it anti-clockwise. Turn the

knurled handle until the zero mark on the chamfered scale (3) is in line with

the next lowest graduation on the linear scale (4). In this case it would be

5.7.

2. Continue to turn the knurled handle, five more graduations. (1 graduation

equals 0.1kg/m). The wrench is now set at 6.2kg/m.

Parts & Service: 020 8988 7400 / E-mail: Parts@clarkeinternational.com or Service@clarkeinternational.com

3. Tighten lock nut (1) to secure the setting.

METHOD OF USE

NOTE: Preferably, DO NOT use knuckle or universal joints, as these could result

in incorrect torque settings.

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 the right hand, whilst steadying the 1/2”

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. DO NOT turn any further.

• Do not jerk the torque wrench in any way to tighten a nut. Apply

even pressure throughout the operation.

•Release the wrench immediately the click is heard/felt.

• It should be noted that the ‘click’ becomes weaker with the lower

torque settings.

ACCESSORIES

• 1/2" Square Drive, x 5" Extension bar

• 1/2" x 3/8" Square Drive adaptor

• Carrying Case

MAINTENANCE

Each torque wrench has been lubricated before leaving the factory. If the

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.

• The wrench may occasionally require servicing/recalibration in order

to ensure accurate readings, in which case, contact your CLARKE

dealer.

CONVERSION FORMULAE

1kg cm= 13.887 oz/in 1Nm = 14.161oz/in

1kg cm= 0.08677 lbf /in 1Nm = 8.8507 lbf/in

1kg/m = 7.233 lbf/ft 1Nm = 0.73756 lb/ft

1kg cm= 0.098 N/m 1kgm = 9.80665 N/m

Parts & Service: 020 8988 7400 / E-mail: Parts@clarkeinternational.com or Service@clarkeinternational.com

CONVERSION TABLES

Pound/

Feet

(lbf.ft)

Kilogram

Metres

kg/m

Newton

Metres

Newton

Metres

Pound/

Foot

(lbf.ft)

Kilogram

Metres

(kg/m)

Kilogram

Metres

kg/m

Newton

Metres

Pounds

/Feet

(lbf.ft)

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 36.17 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

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