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Home  »  Products  »  Bolting Tools  »  Hydraulic Bolt Tensioners  »  CST Series Compact Slimline Bolt Tensioners



CST Series are slimmer, variable type Bolt Tensioners consisting of five parts - Puller, Puller Nut, Load Cell, Bridge & Nut Driver as shown below:

The tool consists of two basic parts - Tensioning Unit and Puller Nut as shown above:


  • Versatile Design: Designed to provide a wide range of flexibility, covering stud sizes 3/4” to 2.1/2” (M-20 to M-64).
  • High Strength Alloy Steel Construction: All Parts are made from high strength Aircraft Quality alloy steel for long lasting performance and better safety factor.
  • Stroke Indication: Marked Piston indicates stroke and provides an over stroke indication.
  • Safe Design: Designed to release high pressure hydraulic oil inwards in event of over-stroke, thus saving the operator from exposure.
  • Anti Roll, Composite Material Seals: Fitted with Anti Roll, Composite Material seals for longer life and high reliability. The seals used have a low coefficient of friction so that the piston can be returned to a closed position with minimal effort. Sub Sea tensioners can be provided with machined PU (poly urethane) seals if requested by the customer.
  • Floating Piston: The unique piston design allows 2º tilt without any loss of load and prevents piston seizure or damage of piston bore.

Model Available

CST - 24 TO CST - 60

Bolt Size Available

(20 mm) 3/4” To (64 mm) 2.1/2”

Max Load

(235.1 kN) 26.4 Tons To (126.6 kN) 191.8 Tons

91-22-4345 3100 / 91-22-2300 0015
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