Clarke PRO414 User manual
USER INSTRUCTIONS
ORIGINAL INSTRUCTIONS GC06/23
½" DRIVE TORQUE WRENCH
MODEL NO: PRO414
PART NO: 1700820
2
Parts & Service: 020 8988 7400 / E-mail: Parts@clarkeinternational.com or Service@clarkeinternational.com
INTRODUCTION
Thank you for purchasing this CLARKE Torque Wrench supplied with extension
shaft and adaptor.
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
tool will produce an accuracy of plus or minus 4%. You can hear and feel
when the desired torque setting has been reached. With careful and
considerate use, the wrench will give years of reliable 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.
OPERATING THE TORQUE WRENCH
TORQUE SETTING ADJUSTMENT
The main body is marked in both Newton/Metres (N/m), and Metre Kilograms
(Mkg). The barrel is marked with 13 graduations, one graduation = 1N/m or
0.14 Mkg.
Example: To set the torque to 90N/m
1. Ensure the lock nut is loosened, by turning it anti-clockwise. Turn the knurled
handle until the zero mark on the vertical scale is in line with the 84 mark on
the horizontal scale.
2. Continue to turn the knurled handle until the 6 mark is in line with the centre
line.
3. Tighten the lock nut to secure the setting.
3
Parts & Service: 020 8988 7400 / E-mail: Parts@clarkeinternational.com or Service@clarkeinternational.com
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.
• Apply even pressure throughout the operation. DO NOT jerk the
torque wrench when tightening a nut or bolt. This is a precise
measuring instrument and should be treated as such.
• Release the wrench immediately the click is heard/felt.
• Note that the ‘click’ becomes weaker with the lower torque settings.
CARE & 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
4
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
Nm
Newton
Metres
Nm
Pound/
Foot
(lbf.ft)
Kilogram
Metres
(kg/m)
Kilogram
Metres
kg/m
Newton
Metres
Nm
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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