Mounting Of Cutters; Remedies For Hole Making Problems - Rotabroach CM/330C Operating Instructions Manual

Issue 9
Apply a small amount of light oil lubricant regularly to slide and arbor support bearing. Cutter breakage is
usually caused by insecure anchorage, a loosely fitting slide or a worn bearing in the arbor support.

[4] MOUNTING OF CUTTERS

The following procedure is to be used when mounting cutters.
Lay the machine on its side with feed handles uppermost, ensuring arbor is wound down to its lowest point to
enable access to socket screws RD4066. Take the appropriate pilot and place through hole in shank of cutter.
Insert shank of cutter into arbor ensuring alignment of two drive flats with socket screws RD4066. Tighten both
screws securely using hexagon key RD4088.

[5] REMEDIES FOR HOLE MAKING PROBLEMS

Problem
Magnetic base won't hold
effectively
Hole not cut at intended
centre of cut
ALWAYS DISCONNECT MACHINE FROM PNEUMATIC SUPPLY
Cause
Material being cut may be too thin for
efficient holding
Swarf or dirt under magnet
Irregularity on contact between
magnet and work piece
Magnetic base is not holding
effectively
Worn arbor bushing and/or ejector
collar
Too much feed pressure at start of cut
Cutter is dull, worn, chipped or
incorrectly sharpened
Worn or bent pilot, worn pilot hole
Loose bolts on motor bushing support
bracket, main casting or loose gib
adjusting set screws
Original Version
Attach an additional piece of metal
under work piece where magnet will be
located, or mechanically clamp magnetic
base to work piece
Clean magnet
Use extreme care, file only imperfections
flush on to surface
See causes and remedies above
Replace! Only a few thousandths wear
permissible. New arbor bushing is
needed
Light pressure until a groove is cut. The
groove then serves as a stabilizer
Replace or re-sharpen. Sharpening
service is available
Replace part or parts
Adjust where necessary
7
December 2011
Remedy