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Recommendations

RECOMMENDATION FOR USING KUGLER BIMETAL PARTS

The shape, clearance, and surface condition of the sliding parts are to be determined by the customer according to his application. As a general rule, we would make the following remarks :

SURFACE CONDITION (FINISH ON SLIDING PARTS)

KUGLER-Tokat bronze - N5 to N6 i.e. Ra 0.4 à 0.8 microns (Ra 16 – 32 microinches)

  • Machine by material cutting
  • Avoid polishing, honing, grinding.
  • These operations may encrust the surface of the bronze with abrasive particles.

Counter-piece - N4 i.e. Ra 0.1 – 0.2 microns (Ra 8 micro-inches)

  • Avoid, if possible, chromium plating (bad for the lubricant)

LUBRICATION GROOVES

  • Rotating and oscillating movements: Straight grooves at 45° to point of contact

Flat parts, linear guides - Arrange the grooves so as to ensure the best distribution of lubricant.

  • If lubrication is not continuous (bubbling, etc), grooves must not be placed crosswise.

ADJUSTMENT OF THE ASSEMBLY (NORMAL BORE)

  • KUGLER-Tokat bronze - H7 or F7
  • Counter-piece - F7 (H6/H7 for slow and oscillating movements)

hardness

KUGLER-Tokat bronze :

  • See table, according to the type of bronze and the thickness of layer.

Counter-piece :

  • Minimum 55 HRC (For Tokat 30 with a high lead content, minimum 35 HRC).

operating temperatures

  • Kugler-BIMETAL parts can operate within a temperature range of -70°C à +250°C

Consult Kugler BIMETAL SA in specific cases