Drilling, Cutting & Grinding Perçage, découpage ... - NAPA Auto Parts

DRILLING, CUTTING & GRINDING
Abrasive Discs
Brush Safety
CAUTION
Abrasive users and others in
area must wear goggles or face
shields over safety glasses.
DRILLING, CUTTING & GRINDING
Brush Usage Recommendations
Inspection and Storage: Upon receipt, inspect brushes for damage, rust
and deterioration. Store in original containers in a clean, dry location. Do
not allow distortion of brush filaments/components or foreign matter to
become lodged in brush face.
Dust and Fumes: Wear respiratory protection against this hazard (see
ANSI Z88.2).
Pressure: Avoid excessive pressure when using a wire-filled power
brush. Excessive pressure causes over-bending of the filaments and heat
build-up resulting in filament breakage, rapid dulling and reduced brush
life. Instead of greater pressure on a brush, it is suggested that you try:
1) A brush with a more aggressive cutting action (increased wire size,
decreased filament length, change to a different brush type, i.e. knot type
instead of crimped wire type), or 2) Higher speed (increased R.P.M.,
increased brush diameter).
Safety Information: Many brush manufacturers mark some safety
warning, recommendations and usage restrictions directly on the product.
It is not always practical to include even the most limited safety
information on the brush itself. Therefore, before operating the brush,
the operator must read and follow all instructions supplied in or on the
product container, as well as those marked on the product itself.
Application Information - Type or Wire
Straight: Twisted tough, provides maximum impact action for severe
applications.
Crimped: Provides a continuous brushing action and a relatively
finefinish.
Steel: Used in most brushes and made with an extremely high degree of
fatigue resistance for longer life.
Stainless Steel: Type 302 stainless for non-contamination on brushing
stainless and other non-ferrous metals.
Wire Size: For maximum brush life, always select the smallest wire size
that will perform your operation.
Important Note: Never exceed the Manufacturer’s recommended
MAXIMUM SAFE FREE SPEED R.P.M. (MSFS) rating of the brush.
Operation Adjustments Chart
Brush works too
slowly
Increase surface speed by increasing brush
diameter or RPM
234
CORRECT
Tips doing the work.
INCORRECT
Excessive pressure can
cause wire breakage.
Self Sharpening: When using wire wheel brushes, periodically reverse the
direction of rotation to take advantage of the self-sharpening action that
will result. This may be accomplished by removing the brush from the
spindle, turning it side for side and remounting securely.
Brushing Problems: DO NOT ALLOW UNSAFE CONDITIONS TO
CONTINUE. Occasionally, due to worn bearings, a bent spindle, an
unusual application, operator abuse, or inappropriate use a brush may fail.
Do not use or continue to use a failed brush or one which is functioning
improperly (i.e. throwing filaments, out-of-balance, etc.) as this increases
the possibility for further brush failure and should be evaluated and
corrected immediately.
Brush works too
fast
Action of brush
peens burr to
adjacent surface
Finish too coarse
and unequal
Finish too smooth
and bright
Decrease trim length
Increase diameter of fill material
(e.g. use 0.020 wire instead of 0.014 wire)
Reduce surface speed by reducing brush
diameter or RPM
Increase trim length
Decrease diameter of fill material
(e.g. use 0.014 wire instead of 0.020 wire)
Decrease trim length and increase fill density
Check position of brush and work piece
Decrease trim length and increase fill density
Decrease diameter of wire
Increase surface speed by increasing brush
diameter or RPM
Use hand-held or mechanical fixture to avoid
irregular motion
Increase trim length
Increase diameter of fill material
Reduce surface speed by reducing brush
diameter or RPM
Reduce brush fill density