Icon PG33

Oil press fit

The Hydraulic Nut for mounting and dismantling roller bearings and oil-pressure mountings

Cost-reducing - Powerful - Reusable

100% compatibility with solutions offered by bearing manufacturers in terms of function, connection geometry and component geometry. Should this series not meet your requirements, please inform us of your needs. Since we have our own design department and production facility, we can manufacture any Hydraulic Nut in the A 55 Series to customer’s requirements. Special solutions up to a hydraulic pressure of 4000 bar are possible.


SCHAAF A 55 Series Hydraulic Nuts offer you many advantages compared to conventional fixing devices and methods of mounting:
  • Robust, durable and lightweight mode of construction
  • Ready for immediate use, fully assembled and oil filled
  • All parts sealed leaktight from –30 °C to +100 °C
  • Purely axial pressure force, independent of stroke
  • Uniform distribution of pressure forces
  • No torsion under load (no thread wear)
  • Wide choice of Hydraulic Nut sizes and designs
  • Several Hydraulic Nuts can also be operated uniformly due to the pressure build-up
  • Repeat accuracy even after a long period of use
  • Simple and easy to maintain
  • Treated surfaces
  • Special designs of any type available upon request
PG33 Einsatzgebiete


The SCHAAF A 55 Series Hydraulic Nuts can be manufactured/supplied as follows:


  • Rust and acid-resistant steels
  • High-strength aluminium alloys
  • Different material combinations
  • Seals for higher temperatures

Surface finish

  • Burnished, lacquered, chemically nickel-plated
  • or as requested by the customer

Areas of Application

Mounting and dismantling of roller bearings with conical or cylindrical seat, conical shaft-hub connections, as well as all types of oil-pressure mountings


Quality Assurance

All Hydraulic Nuts are checked for material quality, dimensional accuracy, proper operation, and pressure resistance. They are subject to quality assurance measures during order execution and delivered with detailed documentation.



The Hydraulic Nuts are, of course, delivered packaged, ready for installation and operation.

SCHAAF Hydraulic Nuts are user-friendly, reliable and are manufactured in accordance with the highest level of technical know-how. Our highly-motivated staff will be pleased to train your personnel, in situ or at our works, in the general handling of high-pressure equipment.

Related Accessories

Fully assembled and ready for immediate use Hand lever pump up to 4,000 bar hydraulic pressure.

High-pressure generators optimally matched to our high-pressure tools.

Hydraulic high-pressure accessories specially adapted to the function.


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Industry-specific special solutions:

All SCHAAF products offer an individual solution for every industry.

Oil press fit proves particularly effective for:

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