vitrified / resinoid cbn & diamond wheels - cheil · pdf filecbn & diamond wheels cbn...

Vitrified / Resinoid CBN & Diamond Wheels

CBN & Diamond: Characteristics

Chemical and Physical Properties

Classification Density g/cmHardnees

Knoop

Compression

Strength(Gpa)

Thermal

Expansion

Coefficient

mm/mm/x10

3

-6

Diamond

CBN

SiC

Al2O3

3.52

3.48

3.22

3.96

7,000

4,500

2,700

2,100

10

7

4.6

3

4.8

5.6

3.1

4.5

Classification General Properties of CBN & Diamond

Diamond

CBN

Carbon cubic crystal, very hard and found in nature

Cubic crystal of BN Hardness next to diamond

CBN /DIA Temperature Resistance

CBN & Diamond: Characteristics1

CBN & Diamond: Cocentration

CBN

DIAMOND

Vitrified Bond Resin Bond (Metal Coating)

Vitrified Bond Resin Bond (Metal Coating)

Concentration

CBN & Diamond: Cocentration 2

CBN & Diamond Wheels Specification Method

SD 200 N 100 B N -3.0

Abrasive typeGrit

Size GradeConcen

tration

Bond

Type

Auxiliary

Symbol

Abrasive

Depth(mm)

D : Nature. diamond

SD : Synth. diamond

SDC : Metal coated

synth. diamond

CBN : Cubic BN

CBNC : Metal coated CBN

16

mesh

3,000

mesh

H

J (Soft)

L

N (Middle)

P

R (Hard)

T

25

Low

50 ↑

75

100

125 ↓

150

High

B : Resin

M : Metal

V : Vitrified

P : Electro

Plated

Bond

charac

teristics

or Maker’s

symbol or

number

displayed.

1.5mm

2.0mm

3.0mm

Characteristics of the CBN/DIA Bond type

Bond Types Characteristics

Vitrified Bond

Resinoid Bond

Used inorganic bonds. Strong and less grinding resistance.

Excellent for grinding and easy dressing are possible to high precision grinding.

Used synthetic resin bonds. Elastic and tensile excellence.

Smooth surface possible and easy to make G/wheel with a long lifetime

CBN & Diamond Wheels Specification Method3

CBN & Diamond Wheels: Application

CBN Wheel Diamond Wheel

Hardened Steel

Bearing Steel

Tool Steel

Super Alloys

Chromium Steel

HSS

Castings

Die Steels

Cast Irons

Tungsten Carbide

Titanium Alloys

Glass

Ceramics

Cermets(Ceramic + metal)

Ferrite(magnet)

Other applications

Abrasive

TypeApplied Materials

CBN

Dia

Alloy

Tool

Carbide

and

Steel

Stainless

Steel

Crystal,

Gem

Stone

Heat

resistant

Steel

Ferrite

(Magnets)

Alloy

Tool Steel

Embrittl

ement

Case

Hardened

Steel

Concrete

Ainico

Anti-

abrasion

metal

Carbon

Tool Steel

Plastics

Inconel

Tiles,

Roofing

Tiles

CBN & Diamond Wheels: Application 4

CBN & Diamond Wheels

CBN Centerless Gringding Wheel

Wheel Size

D T X

Ø 405

Ø 451

Ø 455

* 3 ~ 5

CBN Centerless G/Wheel’s Characteristics

● Vitrified body used to achieve high precision grinding

● Reduces the cycle time and stabilize the product quality

CBN & DIA DISC G/Wheel’s Specs and Condition for Use

Work Piece Condition Hardness Spec

Compressor

Shaft

WC drill

GCD550

Tungsten

Carbide

HB170~230

HRc70

CBN 140 L 200 V

SDC 80 L 100 B

※Depending on the condition for using the G/wheel, the optical specs can be selected..

CBN & Diamond Wheels5


CBN & DIA DISC grinding wheel

CBN & DIA G/Wheel’s Characteristics

Wheel Size

D T X

Ø 305

Ø 355

Ø 455

Ø 585

3 ~ 6*

● Excellent reliability and result

● Excellent surface condition achieved by using highly sophisticated resinoid bond

CBN & DIA DISC G/Wheel’s Specs and Condition for Use


Compressor Roller

Compressor Cylinder

Gear Oil Pump

Inner Bearing Wheel

Race Starter

Snap Ring

FC25

FC20

SCM415

SUJ2

Cast alloy

SK5

HB170~200

HRc60

HRc60-61

HRc60~65

HRc60

CBNC 325 N 75 B

CBNC 140 N 75 B

CBNC 325 V 75 B

CBNC 140 N 75 B

CBN & Diamond Wheels 6



CBN Angular Grinding wheel

CBN & DIA G/Wheel's Characteristics

CBN Angular G/Wheel's Specs and Conditions for Use

● Experienced with various shape of angular G/wheel makes to achieve high quality and stability

● Long lifetime and high precision grinding


Wheel Size

D T X

Ø 300

Ø 360

Ø 450

Ø 550

3 ~ 5*

CBN & Diamond Wheels7

Crankshaft journal

Crankshaft Rear

Crankshaft Front

Speed Gear

SCM440H

S40MS1V

SCM318H1

HRC52~58

HB285~341

HRC60

CBN 120 M 200 V

CBN 100 M 180 V

CBN 100 M 150 V

CBN 170 K 175 V



CBN Crank Shaft Grinding wheel

CBN Crank Shaft G/Wheel's Characteristics

CBN Crank Shaft G/Wheel's Specs and Conditions for Use

● High precision and excellent grinding

● Competitive G/Wheel with stable quality and low prices

Wheel Size

D T X

Ø 550

Ø 560

Ø 650

Ø 652

Ø 750

3 ~ 5*

CBN & Diamond Wheels 8


Crankshaft

Journal

Crankshaft

Pin

FCD70C

SCM440H

FCD70C

SCM440H

FCD70C

Hv269~328

Hv229~255

Hv269~328

CBN 140 M 180 V

CBN 140 M 180 V

CBN 120 M 200 V

CBN 120 M 180 V

CBN 100 M 180 V

CBN 120 M 180 V

CBN 120 M 180 V

CBN 140 M 180 V


Wheel Size

D T X

Ø 254

Ø 305

Ø 350

Ø 354

Ø 400

Ø 450

3 ~ 5*


9



CBN CAM Shaft Grinding wheel

CBN CAM Shaft G/Wheel's Characteristics

CBN CAM Shaft G/Wheel's Specs and Conditions for Use

● High precision processing for excellent quality of the G/wheel

● Available to manufacture high speed G/wheel (160m/Sec). High precision and excellent grinding


CAM shaft

Fuel injection CAM

MX CAM shaft

FC25

FCD

SCM415

FC20

HB201-262

HRc54~63

HRc54~63

HB350~500

CBN 80 M 200 V

CBN 100 H 100 V

CBN 120 I 150 V

CBN 80 M 200 V

CBN 80 K 175 V

Wheel Size

D T X

3 ~ 5*

10




CBN & DIA : Internal Grinding Wheel and other products

Internal G/Wheel's Characteristics

Internal G/Wheel's Specs and Conditions for Use

● High precision and excellent grinding

Ø 60 or less

Compressor

Cylinder

Compressor

Flange

Annulus Gear

Inner bearing wheel

FC20

GC250

GC250

SCr420L1H1

SUJ2 (Carburizing thermal

processing)

HB170~200

HRB65~85

HRB65~85

HRC 59

HRC 60~62

CBN 230 P 150 V

CBN 200 N 200 V

CBN 230 P 150 V

CBN 120 F 150 V

CBN 230 R 200 V


CBN & Diamond Wheels Shape Specification Methods

11 CBN & Diamond Wheels Shape Specification Methods

Selection of Coolants

Truing / Dressing Tools

CBN & Diamond Wheels Shape Specification Methods 12

Grinding wheel Coolants Remarks

Classification Tool name Grinding wheel Specs

Diamond

grinding wheel

CBN grinding wheel

Vitrified

bond

grinding

wheel

Resinoid

bond

grinding

wheel

Truing

and

dressing

Truing

Dressing

Single dresser

(point dresser)

Multi dresser

Rotary dresser

Block dresser

Control(driving)

truing device

Bond dresser

Rotary dresser

Block dresser

Control(driving)

truing device

GC stick

WA stick

Soft steel materia

Glass particle

CBN

CBN

CBN(Dia)

CBN

CBN(Dia)

CBN(Dia)

CBN(Dia)

CBN(Dia)

CBN(Dia)

CBN(Dia)

CBN

CBN(Dia)

CBN(Dia)

Water soluble coolant(chemical solution type KS3)

Faucet water can available

Non water soluble liquid

For heavy grinding coolant soluble liquid

(Emulsion type KS 1)

Water soluble coolant

(soluble type KS W2)

In case of rapping and difficult to coolant injection

are not applied

Optimal for the CBN grinding wheel

Especially good for fine particle grinding wheel

Please use it to get a better result than water

soluble liquid.

Generally used.

Dilution level of 20 to 50 which is less than

the general grinding wheel to extend the lifetime of it.

Used for a small amount of inner area grinding

Can perform truing on the grinding stone with concentration

of less than 75.

Feed: 0.005mm or less

Conveyance: 0..1mm/rev

Concentration: 75 or less

Feed: 0.003 to 0.005mm

Conveyance: 0.3 to 0.6mm/rev

Used for a large G/wheel with high precision

Concentration: more than 100

Select #80 to #140 according to the particle size.

Feed: 0.003 to 0.005mm

Conveyance: 0.1mm/rev


Feed: 0.005 to 0.01mm

Conveyance: 70 to 300mm/rev

Truing with the general magnets GC60HV and GC80HV(must be a wet type)



Feed: 0.01 or less

Conveyance: 100 to 200mm/rev

Same as the vitrified bond grinding wheel


Better truing effects can be obtained maximize the cutting depth while

considering the shapes. Post dressing is required

Select two level lower than the grinding stone.

Combination: F to H

S45C and SS41 material used

Can obtain a larger chip pocket than a stick. But it takes too much time.

Truing and dressing at the same time

Mostly for a cup type grinding stone

Select two or three levels lower than the grinding stone.

www.grinding.co.kr

140-2, Jangheung-Dong, Nam-Gu, Pohang-Si, Gyungbuk, Korea

Tel: 82-54-285-8401 Fax: 82-54-285-5780

e-mail: [email protected] / [email protected]

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