Specialist knowledge | Design

Installation of the guide bush

Avoid interference fit!

Interference fit will deform the inner diameter d1 of the guide bush that is machined with highest precision. The guide bush is deformed by the installation bore. This results in form errors and an increased preload. The properties of the rotary stroke bearing are negatively affected. Radial clamping and pressure screws are also unsuitable for the same reasons.

The tolerance of the outer diameter dB of the MarMotion guide bushes corresponds to ISO-n4 (or ISO-h6 for type N 570). The tolerance<br/> of the installation bore should be selected so that interference fit<br/> is avoided.

We recommend:

  • Fixation using a flange, retainers, circlips, etc.
  • Installation bore for sliding fit n4/F6 (for N 570 h4/H6).  
  • Gluing with one- or two-component adhesives. The instructions provided by the adhesive manufacturer regarding the adhesive gap, curing time, etc. must be observed. Experience has shown that a slow curing adhesive is advantageous.
  • The wall thickness of the guide bush should not be made too thin. Guide bushes with thin walls are difficult to manufacture and deform easily during installation. Recommended wall thickness: Inner diameter d1 · 0.1
  • The required wall thickness is determined by the mode of fixation.

    Installation with sealing

    An installation with a sealing is necessary if dirt,<br/> especially in the form of abrasive substances, cannot be avoided.

    Sealing options:

    • Sealing rings (see type N 553)
    • Wiper Seals (see type N 570)
    • Bellows (see type N 820)

    When using airtight sealings, pressure compensation must be provided if necessary.

    Fastening methods
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