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  • Structural bolt tightening works were carried out on a 50 metre cycle track bridge in Malaysia using Hi-Force TWP22S pneumatic torque multiplier with respective sockets. A total of 568 bolts were tightened within three days and involved tightening of M24, M27 and M30 bolts to a specific torque. #hiforce #bolttightening #torqueing #torquemultiplier
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HTN Imperial Range

HTN11-250
  • Capacities from 198 to 1911 kN
  • Bolt sizes from 1" to 4" diameter
  • Working pressure 1500 bar

The Hi-Force HTN range of top collar hydraulic nuts is specifically designed and manufactured for applications where regular, periodic opening of the joint, for inspection and maintenance purposes is required. Unlike conventional hydraulic bolt tensioners, Hi-Force HTN series hydraulic nuts are designed to permanently replace standard hexagon nuts, on one side of the bolted joint. Initially the bolt tension or elongation is applied hydraulically and once achieved, it is permanently retained via the integral mechanical load retaining collar.

Standard range models are available for imperial bolt sizes from 1” to 4”, with other sizes available to special order. All models are 1500 bar maximum working pressure and supplied with quick connect hydraulic couplings, compatible for use with Hi-Force air or manually operated hydraulic bolt tensioner pumps and hoses.

  • Single acting design with integral load holding lock nut
  • High grade alloy steel construction
  • Nitrocarburised piston
  • Visible maximum piston stroke indicator
  • Dual quick connect couplings for easy connection
Hydraulic Tensioner Nuts Imperial Range

Specifications

Model No. Bolt Size Capacity Effective area cm2 Stroke mm Weight kg Tommy Bar Dimensions in mm
kN tonnes A B C D
HTN1-100 1" - 8 UN 198.27 20.21 13.22 5 1.9 TTB06 72 55 18 132
HTN2-112 1 1/8" - 8 UN 216.30 22.05 14.42 5 2.0 TTB06 75 55 18 132
HTN3-125 1 1/4" - 8 UN 252.94 25.78 16.86 5 2.4 TTB06 82 57 21 134
HTN4-137 1 3/8" - 8 UN 305.83 31.18 20.39 5 2.7 TTB06 88 57 22 135
HTN5-150 1 1/2" - 8 UN 344.12 35.08 22.94 6 2.9 TTB06 93 58 21 135
HTN6-162 1 5/8" - 8 UN 397.61 40.53 26.51 6 3.5 TTB06 100 62 23 142
HTN7-175 1 3/4" - 8 UN 475.01 48.42 31.67 6 4.0 TTB06 106 64 24 141
HTN8-187 1 7/8" - 8 UN 501.40 51.11 33.43 6 4.2 TTB06 110 64 25 142
HTN9-200 2" - 8 UN 563.72 57.46 37.58 6 4.9 TTB06 117 67 32 145
HTN10-225 2 1/4" - 8 UN 746.44 76.09 49.76 8 6.4 TTB06 128 74 28 152
HTN11-250 2 1/2" - 8 UN 905.13 92.27 60.34 8 8.0 TTB06 141 77 29 155
HTN12-275 2 3/4" - 8 UN 999.85 101.92 66.66 8 8.8 TTB08 150 78 30 156
HTN13-300 3" - 8 UN 1203.43 122.67 80.23 8 10.6 TTB08 162 81 31 159
HTN14-325 3 1/4" - 8 UN 1413.72 144.11 94.25 10 12.9 TTB08 174 87 35 165
HTN15-350 3 1/2" - 8 UN 1605.04 163.61 107.00 10 16.2 TTB10 187 95 37 173
HTN16-375 3 3/4" - 8 UN 1704.59 173.76 113.64 10 18.3 TTB10 194 102 39 179
HTN17-400 4" - 8 UN 1911.46 194.85 127.43 10 21.9 TTB10 205 110 41 188

Note: Tommy bars are not included. Hi-Force recommends one tommy bar for every four tensioners. 

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