J & M Diamond Tool: Hard Turning Solutions with CBN

J&M Diamond Tool, Inc.

Hard Turning Solutions
(Working with CBN )

Hard turning problems find easy solutions with CBN inserts. We offer a wide selection of grades, shapes and sizes.

If you have special need, our technical service department will provide further solutions, and we can manufacture to your specifications.

Cubic Boron Nitride

Cubic boron nitride (CBN) is an artificially synthesized material exceeded in hardness only by diamond. Unlike diamond, CBN is stable under conditions of high temperature (up to 1000 degrees C) normally created when machining hardened ferrous or super alloy materials.

Like polycrystalline diamond, CBN is available in many shapes and sizes. Discs are available up to 60 mm diameter and in different grades for different applications.

CBN tools permit metal cutting at feeds and speeds much higher than with conventional cutting tool materials. CBN tools also turn, bore and face hard materials, which otherwise can be formed only by grinding. Because CBN tools maintain a sharp cutting edge, surface finishes are excellent, close tolerances are easy to maintain, and dramatic productivity increases can be expected.


CBN Inserts

Mini Tips	Flip Tips	Standards
Inexpensive. In many shapes and grades for shallow cuts	Cost-effective. Two cutting edges for finish cuts. Flip Tips is a trademark of J&M Diamond Tool, Inc.	A wide assortment of shapes and grades

Large Tips	Solid CBN	Full Face
For deeper cuts. - Available on most standard inserts	Cutting edges on both sides. Indexable.	Cutting edges. Full top surface Indexable.

Materials Recommended
for cutting with CBN

CBN Grades Available

Edge Preps

Recommended use
of CBN Grades

Recommended
Speed and Feeds

Materials recommended for cutting with CBN:

Alloy steel (45-68 RC)	Ni Hard	Die steel (45-68 RC)	Rene
Carbon tool steel (45-68 RC)	Forged steel	Stellite	Ductile iron
Moly chrome steel rolls	Nodular iron	Colmonoy	Incoloy
High speed steel (45-68 RC)	Grey iron	Waspoloy	Monel
Chilled cast iron	Inconel 600	Meehanite iron

CBN Grades Available

- Grade -	Application
1000	Most cast iron
2500	Continuos cutting hardened steel and slight interrupted cuts.
3000	Hardened steel ( severely interrupted cut )
5000	Nodular iron - Ductile Iron
6000	Super alloy, Ni/Co base alloys
8200	Continuos cutting hardened steel and slight interrupted cuts
-	Other special grades available

Edge Preps
A standard edge prep is put on all inserts.
Special edge prep is available for special applications.

Grade	Angle	Width
Grade 1000	15^o K Land	.002 - .004"	No hone
Grade 2500	25^o K Land	.004 - .006"	Light hone
Grade 3000	25^oK Land	.004 - .006"	No hone
Grade 5000	15^oK Land	.004 - .006"	No hone
Grade 6000	20^o K Land	.004 - .006"	Light hone
Grade 8200	25^o K Land	.004 - .006"	Light hone

Recommended Use of CBN Grades

Material	CBN Grades
Alloy steels ( 45-68 RC )	2500, 3000, 8200
Carbon tool steels ( 45-68 RC )	2500, 3000, 8200
Die steel ( 45-68 RC )	2500, 3000, 8200
High speed steel ( 45-68 RC )	2500, 3000, 8200
Chilled cast iron	1000
Nodular cast iron	5000
Ni Hard	1000, 6000
Forged steel	2500, 8200
Moly chrome steel rolls	6000
Inconel 600	6000
Rene	6000
Incoloy	6000
Monel	6000
Stellite	6000
Colmonoy	6000
Waspoloy	6000
Nodular iron	5000
Ductile iron	5000
Grey iron	5000

Recommended Speeds and Feeds

Material	Speed (SFM)	Feed Rate (IPR)	Depth of Cut (inches)
Carbon Steel	200 - 500	.008 Max	.020 Max
Bearing Steel	200 - 500	.008 Max	.020 Max
Alloy Steel	200 - 500	.008 Max	.020 Max
Die Steel	160 - 350	.008 Max	.020 Max
Tool Steel	160 - 350	.008 Max	.020 Max
High Tensile Cast Iron	200 - 500	.060 Max	.020 Max
Chilled Cast Iron	130 - 260	.032 Max	.020 Max
Grey Cast Iron	2000 - 4000	.020 Max	.020 Max
Powdered Metal	500 - 650	.016 Max	.020 Max
Inconel	500 - 650	.006 Max	.020 Max
Rene 42	500 - 650	.006 Max	.020 Max
Rene 77	450 - 550	.006 Max	.020 Max
Incoloy	750 - 900	.006 Max	.020 Max
Monel	550 - 650	.006 Max	.020 Max
Stellite	550 - 650	.006 Max	.020 Max
Colmonoy	550 - 650	.003 Max	.020 Max
Waspoloy	550 - 650	.003 Max	.020 Max

CBN Insert turning Harden Shaft

J & M DIAMOND TOOL, INC.
Toll Free ( 800 ) 777-6813 - - Fax ( 401 ) 431-2222	Email: Information@diamondtool.com