Treatment of Firmly Screw-Connected Contact Surfaces

WARNING
HAZARD OF INAPPROPRIATE ASSEMBLY When handling bars insulated by heat-shrinkable sleeves, ensure that heat-shrinkable sleeve does not get in contact with lubricant to prevent swelling. Do not touch the contact areas coated with lubricant Mobilith SHC 100. Failure to follow these instructions can result in death, serious injury, or equipment damage.

Follow the below steps for treatment of firmly screw-connected contact surfaces:

Before screw fastening, contact areas must be subjected to preliminary treatment.

Material of contact surfaces	Pre-treatment
Silver-plated contact surfaces	Clean⁽¹⁾
Hot-galvanized sheet-metal	Clean⁽¹⁾, passivation need not be removed
Copper or copper alloy	Clean⁽¹⁾, expose metallic surface⁽²⁾
Aluminium	Clean⁽¹⁾, expose metallic surface⁽²⁾
Steel	Clean⁽¹⁾, expose metallic surface⁽²⁾
Zinc-plated steel	Remove passivation, not the zinc layer⁽³⁾
Nickel-plated contact surfaces	Remove passivation layer⁽⁴⁾
⁽¹⁾ Clean by means of lint-free cloth; use cleaning agent in case of serious contam-ination. ⁽²⁾ Expose metallic surface by treating the entire surface with emery cloth or a rotating grinding tool (grain-size 100 or 80) or using a wire brush which is clearly marked for use exclusively for aluminium or exclusively for copper. ⁽³⁾ Using a brass brush, steel brush. ⁽⁴⁾ Rub slightly by hand using Scotchbrite abrasive agent (Ni layer must not be reduced).