Truing & dressing｜A.L.M.T. Corp.

Truing and dressing are very important to effectively use diamond/CBN wheels so that they fully demonstrate their excellent performance. No matter how precisely the wheel is attached to the machine, runout occurs at the initial stage after installation.

Also, the abrasive grain layer deteriorates in accuracy and sharpness decreases due to wear in the grinding process. To maintain good sharpness, truing and dressing with a method and condition suitable for the grinding wheel is required.

Immediately after installing the equipment, correcting circumferential runout is required. Crushing and falling off of abrasive grains reduce sharpness.

Eliminate irregularities on the abrasive surface, as well as runout, and create perfect circle (truing)

Retract bond and project the cutting edge (dressing)

【Truing】: To mold when the grinding surface sways while the wheel is rotating or when the shape has collapsed.
【Dressing】: To remove unnecessary bond and chips on the surface, letting abrasive grains project.

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Example of selecting conventional whetstone for truing
Abrasive grain size	＃60～＃140	＃170～＃270	＃325～＃500	＃600～
B	C80K	WA120 I	GC300H	GC500H
M/V	C80K	C80K	WA120 I	GC300H

To see the whole table, scroll sideways..

Example of selecting conventional whetstone for dressing
Abrasive grain size	＃60～＃120	＃140～＃170	＃200～＃270	＃325～＃500	＃600～＃1000	＃1500～
B	WA200G	WA200G	GSC00H	GC500H	GC1000G	GC1500F
M/V	WA120 I	WA200G	WA300G	WA300F	WA500F	GC8001F

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Compliance table of Diamond/CBN wheels truing and dressing
◎：Best ○：Good △：Possible Blank：Not suitable			Truing						Dressing
◎：Best ○：Good △：Possible Blank：Not suitable			Diamond Wheel			CBN Wheel			Diamond Wheel			CBN Wheel
Truing method and tool			Ｂ	Ｍ	Ｖ	Ｂ	Ｍ	Ｖ	Ｂ	Ｍ	Ｖ	Ｂ	Ｍ	Ｖ
Diamond tool method	Rotary	Rotary dresser	◎	○	◎	◎	○	◎	◎			◎	○
		Metal wheel	○		◎	○		◎
		Electroplated arbor dresser	○		◎	○		◎
	Stationary	Single stone dresser
		Multi-stone dresser			◎			◎
		Impregnated dresser			◎			◎
		High precision block dresser			○			○			○			○
		Electroplated block dresser			○			○			○			○
Conventional grinding wheel method	Rotary	Block grinding	○	○	○	○	○	○	◎	◎	○	◎	◎	○
		Brake control	◎	◎	◎	◎	◎	◎	○	○	○	◎	◎	○
		Cup wheel drive	○	○	○	○	○	○	◎	◎	○	◎	◎	○
	Stationary	Stick	◎	○	△	◎	○	△	○	◎	○	◎	◎	○
Mild steel method	Rotary	Mild steel roll	○	△	△	○	△	△	○	◎	△	○	◎	△
Mild steel method	Stationary	Mild steel block	◎	△	△	○	△	△	○	◎	△	○	◎	△
Crushing method	Crushing roll			○	◎		○	◎
Loose abrasive grain method	Abrasive grain lapping		○	○	○	○	○	○	△	△	△	△	△	△
	Abrasive grain blasting		△	○		△	○		△	△	△	△	△	△
	Abrasive grain sludge pouring								○	○	△	○	○	△
Electric discharge method	Electrode			◎			◎			◎			◎