Block cylinders, piston with internal thread
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Block cylinders, piston with internal thread




Contact bolts,
for screwing into the
internal thread of
the piston rod











Block cylinders are popular design elements in all areas where very powerful short strokes are required. Block cylinders have internal piston rod threads for secure screw-in contact bolts. Their compact cubic shape facilitates attachment and guarantees high operating pressures. Various versions of hydraulic oil feed cover the whole range of applications.

The HYDROKOMP block cylinders offer technical advantages in the area of the seal at the piston-rod end. A double hydraulic seal is used here as standard, guaranteeing extremely low leakage in continious operation. All block cylinders are also equipped with a metal wiper ring, which prevents any metal shavings from penetrating into the soft wiper ring.



The double-acting function permits precise stroke times as the piston is extended and retracted. Extension and retraction strokes are force-actuated.



HYDROKOMP offers single-acting block cylinders with or without spring return. With a spring reset function the piston is pulled by the spring into the start position when depressured. Block cylinders without reset spring do not have an automatic piston return.


Special features:
  • ideal for continuous operation

  • space-saving installation

  • four mounting options

  • metal wiper as standard

  • internal piston threads for secure screw-in eg. contact bolts

  • standard cylinders and special design available

Exemplary design of a block cylinder


  1. sealing bush
  2. soft wiper
  3. metal wiper
  4. rod side
  5. port, retract
  6. lengthwise and crosswise bores
  7. cylinder housing
  8. port, extend
  9. piston
10. bottom side
11. piston sealing
12. piston stroke
13. rod sealing




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Weltkarte mit HYDROKOMP Vertriebspartnerländern weltweit

Technology that connects

HYDROKOMP Headquarters 1

Founded 1998, HYDROKOMP designs, manufactures and distributes hydraulic components, coupling systems and clamping technology for mechanical engineering, fixture construction, tooling and many other branches of industry also for different operating conditions.

HYDROKOMP Headquarters 2

HYDROKOMP is the right supplier for companies of mechanical engineering fixture construction, tooling and many other branches of industry worldwide. Constructive ideas and customer-specific designs are our particular strengths.

HYDROKOMP Production Facility 1

Each and every one of our products is developed and manufactured according to the highest quality standards. With modern CAD systems we design new solutions. After that, current procedures of precision manufacture and quality assurance are next in process.

HYDROKOMP Production Facility 2

Our qualified employees and our modern CNC machinery ensure high flexibility product variety and quality. HYDROKOMP products are designed for long-lasting application in rough industrial daily routine. Our customers can surely trust that the process will flow smoothly.

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