Filing Room Consumables

Pacific/Hoe Corporation is now offering grinding wheels incorporating 3M's new 321 ceramic abrasive grain. This grain is available in both resinoid and vitrified bonds and a large variety of applications including gumming wheels and segments that are unparalleled in performance and quality. Conventional ceramic grain fractures and dulls, but this new ceramic sheds very small particles during the grinding process, thereby exposing new sharp grain continually. This also means less dressing and virtually eliminates loading.

Advantages

Increased grain hardness, toughness and density.
Significant increase in life and cutting ability per abrasive grain.

Benefits

Holds shape or form longer
Less power required
Particles stay sharper longer
Requires less dressing
Significantly longer life
Cooler grinding
Works well on a variety of materials.

Dressing

Ceramic wheels can be shaped with either a diamond point tool or a dressing brick. After shaping, the surface should be opened using a star type dresser to create new fractured points on the particles.

Performance

The optimum grinding performance of the wheels can be fine tuned by varying the RPM or the feed rate.

Wheel acts harder	Wheel acts softer
Increasing wheel speed	Decreasing wheel speed
Decreasing work speed	Increasing work speed
Decreasing traverse speed	Increasing traverse speed
Decreasing infeed	Increasing infeed

Grade Recommendations	Sizes
It is recommended that speeds be adjusted to grind band saws being tipped with either Stellite(tm) or High-Speed steel. When grinding in newly formed tips, speeds of 8000 SFPM to 9500 SFPM will grind more aggressively and have better shape holding characteristics. for normal maintenance use approximately 2000 RPMs.	10 x 1/2 x 1-1/4
	10 x 5/8 x 1-1/4
	10 x 3/4 x 1-1/4
	12 x 1/2 x 1-1/4
	12 x 5/8 x 1-1/4
	12 x 3/4 x 1-1/4
	12 x 7/8 x 1-1/4
	12 x 1 x 1-1/4
	12 x 1-1/4 x 1-1/4

Pacific/Hoe Resinoid (Tan)	Pacific/Hoe Vitrified (Blue)	Norzon (Blue)
5A36.2-010-BG-T	6A46-N8-V78-T	SG46-M8VS
5A60.1-010-BG-T	6A60-N8-V78-T

Grinding Wheel Test Chart

Resinoid / Ceramic

50% Ceramic content
Hold their shape
Diamond dresses well
Good for wet or dry applications
Especially good value

Resinoid

Uses a resin bond which makes this wheel very durable
Excellent for dry grinding
Difficult to diamond dress
Not recommended for wet grinding

Vitrified

Uses a glass bond which is quite brittle
Good for wet or dry grinding
Well suited for diamond dressing

Vitrified / Ceramic

Vitrified bond with 30-50% ceramic content
Ceramic makes this wheel durable under heavy grinding
Diamond dresses well
Good for dry or wet applications

CBN (Borazon)

Cubic boron nitrate is used primarily to grind Stellite(tm) tipped saws, but also grind steel
Needs to be purchased with a preformed shape
Tends to burn during medium stock removal
Very expensive

Stellite(tm) is a registered trademark of the Stoody Deloro Corp.

Pacific/Hoe Saw and Knife Company
World Wide Corporate Headquarters
P.O. Box 82155, 2700 SE Tacoma Street
Portland, Oregon 97222
Tel (503)234-9501 Fax (503)234-3506