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Use of super hard grinding wheel

▲ Density (concentration): the content of diamond in volume of grinding wheel, %

◆ Fine-grain grinding tool adopts low density.

◆ Wide working face and profile grinding applies high density.；

◆ Rough grinding applies higher density, semi-finish grinding and finish grinding apply medium density,
grinding and polishing apply low density.

◆ High efficiency grinding applies higher density

Attention：

① Industrial diamond is sensitive to heat, and it begins to oxidate when be heated by about 700℃ in the air.

② If it is high feed speed, it is suitable to adopt small feed cutting. If it is low feed sped, it is suitable to adopt large feed cutting.

◆.Electroplated grinding wheel

(1).Grain size and diamond allowance

Classification	Grain size (schedule)	Allowance
For rough grinding	#25/30	0.800mm
	#30/40	0.650mm
	#40/50	0.500mm
	#50/60	0.400mm
	#60/80	0.300mm
	#80/100	0.250mm
	#100/120	0.200mm
	#120/140	0.180mm
For medium grinding	#140/170	0.150mm
	#170/200	0.125mm
	#200/230	0.100mm
For finish grinding	#230/270	0.090mm
	#270/325	0.080mm
	#325/400/	0.070mm
	40-60(#400/500)	0.060mm
	30-40(#500/600)	0.040mm
	20-30(#600/800)	0.030mm
	12-25(#800/1000)	0.025mm
	10-20(#1000/1200)	0.020mm
	5-12(#1500-2000)	0.010mm

(2). Precision of grinding wheel and installation precision

●. Precision of grinding wheel （JIS B0405 intermediate）

With standard bar as datum, deviation value of circumference doesn't exceed 20μm, and deviation value of side doesn't exceed 10μm.

(Set datum plane in the table, and machine with the diamond)

●.Installation precision of grinding wheel

Please set the deviation value of datum plane to be 1/5 of allowance (example)

Grain size	Allowance(mm)	Deviation value
#80/100	0.250	≤50
#170/200	0.125	≤25
#600/800	0.030	≤ 6

The above table is subject to diamond grain. CBN has a lot of difference.

(3).Regrinding

Grinding is same as regrinding of grinding wheel (to bare the diamond) in the original binder system, but electro-deposit is measure taken to improve broken work-piece and adjust roughness of machining surface. However, frequent application of this treatment will weaken grinding and shorten lifetime.

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