Page 5 - Buffalo Book - Final

CENTERLESS GRINDING WHEELS - VITRIFIED

WE MEET YOUR SPECIFIC NEEDS COMMON CENTERLESS MACHINE

• Diameters 12” - 48” • Acme • Royal Master • Kent
• Thicknesses 4” - 12” one piece (20” Sets – 10” sections) • Cincinnati • Glebar
• High performance abrasive grain blends
• Grit sizes 46 - 240 grit
• Vitrified Bond for form holding, Infeed, Endfeed grinding

PRINCIPLES OF CENTERLESS GRINDING

Centerless Grinding picks up where • Parts that can’t be centered can achieve roundness through grinding
Machining Leaves Off • No axial thrust on workpieces – brittle, long pieces aren’t distorted
• Finishing outside diameter of small cylindrical metal parts requiring a tight tolerance
• Centerless grinding involves the part being supported on a workpiece rest blade that sits
between two rotating cylinders
Simple Straight Forward Process • A regulating wheel controls the part’s rotational speed
• Abrasive Wheel is larger diameter
• Centerless grinding performs at consistently high speeds
• Great for high volume applications
• Thru-feed grinding is used for parts with consistent roundness across the length of the part
Types of Centerless Grinding • In-feed grinding — also called plunge grinding — is used to grind cylindrical parts with
notches or complex shapes

PART ROUNDNESS WITH CENTERLESS GRINDING

• Centers of the regulating and grinding wheels are set at the same • If the angle of the regulating wheel is too acute, the workpiece
height on the machine. enters too far into the grinding zone, uneven wear, tapering, and
• Center of the workpiece is situated higher. (if the workpiece is set reduced wheel life
too high = chatter loose) • If regulating wheel is too close to parallel with the grinding wheel,
• Workpiece is set too low = out of round parts can stall between the wheel
• Keep the part in contact with the regulating wheel and rotating at
a slower speed while the faster, larger abrasive grinding wheel
applies the force that creates the precise roundness of the part.
Using the correct wheel angles helps to ensure that the entire
surface of the grinding wheel is in use

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Please contact your local distributor or sales rep/engineer for additional information.