1.0 Recommended tools and equipment
Grinding work on the outer skin:
The workbay can be cleaned with conventional extractor systems (low dust concentration).
Grinding work on the structure (except Z8):
The workbay can be cleaned with conventional extractor systems (low dust concentration).
Z 8 Spaceframe structure:
The workbay must be cleaned with the recommended explosion-proof extractor system.
High dust concentration, explosion hazard!
2.0 Grinding outer skin and structure
Do not use any abrasives (grinding wheels, paper, etc.) which contain iron (risk of corrosion).
Always replace abrasives which have already been used to treat steel (risk of corrosion).
Use stainless steel wire brushes only (risk of corrosion).
Reduce speed of grinding machines. Excessive speeds cause a smearing effect.
Do not use coarse abrasive grains (only ≥ 80).
Do not grind notches into the material (risk of cracking).
Do not grind the material thin.
BMW X3 Service & Repair Manual > Brakes: Front brake
FRONT BRAKE SPECIFICATION
IMPORTANT:
Installation of new brake pads is approved only provided that the brake disc thickness exceeds the
specified dimension for "MIN TH" (see table).
Brake discs must be replaced when they reach the nominal thickness (see table) minus 2.4 mm!(Not
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