Honing Stone

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A honing stone is an abrasive that is matched with other honing tools and then installed on honing machines to process parts with bores. They are highly efficient, have a high honing precision, a fine finishing, and a reliable repairing performance, making them suitable for honing applications in the machining industry. The most commonly used abrasive materials include diamond stones, cubic boron nitride stones, alumina stones and SiC stones.

As a professional manufacture of honing product, we provide high quality stones made from premium abrasive materials. Based on an advanced formula and processing technology, these abrasive stones have a longer lifespan and significantly improve the honing efficiency.

Application

Abrasive Materials	Code	Application	Notification
Cubic Boron Nitride	NM	Quenched steel and tempered Steel
Diamond	DM	Cast iron, aluminum, copper, carbide, ceramics and other materials
Alumina	A	Quenched and tempered steel
SiC	J	Aluminum, copper alloy and cast iron

The above stone can match both a single-stone holder and the multi-stone holders. For example, the No. P28 stone holder is suitable for stones and sandbars numbered P28NM, P28DM, P28A and P28J.

Grit Size Number

No.(set by HONGNING)	Grit size
3	100
4	150
5	220
6	280
8	400
9	500
0	600
90	900
00	1200

Hardness Number of Stone

Hardness No.
Soft↓Hard	3
	5
	7
	9
	11
	13

Example for Stone Selection

1. Hardness

2. Grit Size

3. Abrasive Materials

4. Series No.

Note: all stones are marked in the same way of the K12 stone.

Selection Reference Table

Grit Size		3- (100#)	4-(150#)	5-(220#)	6-(280#)	8-(400#)	9-(500#)	0-(600#)	90-(900)	00-(1200)
Material	Abrasive type	Roughness (μm)
Hard Steel	Alumina/SiC	-	0.50	0.45	0.30	0.12	0.08	0.03	-	-
Hard Steel	Cubic Boron Nitride	1.40-2.00	1.15	1.00	0.70	0.50	-	0.18	0.10	0.05
Soft Steel	Alumina /Sic	-	0.9-1.40	0.65	0.50-0.9	0.18-0.25	0.10-0.20	0.05	-	-
Soft Steel	Cubic Boron Nitride	1.60-2.5	-	1.25-2.0	-	0.65	-	0.40	0.25	0.12
Cast Iron	SiC	-	0.75-1.0	0.50	0.30	0.15	0.12	0.08	-	-
Cast Iron	Diamond	-	-	2.00	-	1.27	-	0.50	0.40	0.30
Nonferrous Metal	SiC	4.30	2.00	1.40	0.85	0.40	0.30	0.05	-	-
Hard Alloy	Diamond	-	0.75	0.50	-	0.18	-	0.08	0.05	0.03
Ceramic	Diamond	-	1.27	1.00	-	0.50	-	0.40	-	0.25
Glass	Diamond	-	2.40	1.80	-	0.75	-	0.40	0.30	0.20
Honing allowance		0.05-0.10mm				0.02-0.05mm		0.01-0.02		<0.01