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Lubrication Of Worm Gear

 

 

Worm Gear Lube Types

  • Polyalphaolefins (PAOs) :
  • Good high and low temperature properties.
  • Compatible with most mineral oils.
  • PAOs don’t attack paints or seals.
  • Most formulations contain a small amount of organic ester or anti-wear mineral that improves boundary lubrication conditions.
  • Polyalkylene glycols (PAGs):
  • Excellent for worm gear applications.
  • Superior lubricity properties and have good low and high temperature properties.
  • The Viscosity Index of PAGs is HIGHER than most synthetic.
  • Incompatibility with other fluids.
  • They also attack paints, seals and polycarbonate sight glasses.

 

Worm Gear Failure

1.    Bending Fatigue –This common type of failure is a slow, progressive failure caused by repeated loading.

3.       Contact Fatigue –Repeated stresses cause surface cracks and
detachment of metal fragments.

        

2.    Scuffing –Transfers metal from the surface of one tooth to that of another. In some cases, surface material is plastically deformed and displaced over the tooth tip or into the tooth root.

4.         Wear – Gear tooth surface wear involves removal or displacement of material due to mechanical, chemical or electrical action.

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