1. IRD series Iljin Resin & Vitrified bond Diamond
ILJIN DIAMOND Co., Ltd.

2. IRD - series Application Physical Properties Available Mesh Size
30wt% Nickel Coating
IRD-II
Application
Tungsten Carbide, WC/Steel, Ceramic Grinding
PCBN, PCD, WC Tool Grinding
Granite Tile Grinding
Resin Bond Wheel
Vitrified Bond Wheel
Physical Properties
Bare Diamond Density : 3.52g/cc
30wt% Nickel Coated Density : 4.22g/cc
56wt% Nickel Coated Density : 5.20g/cc
Available Mesh Size
From 80/100 to 400/500
IRD-III
56wt% Nickel Coating
IRD-F

3. Toughness Index Comparison of toughness TI value Mesh Size Mesh size
140/170
230/270
325/400
IRD-F
20.0
30.0
43.0
PDA-211
22.0
27.0
25.8
RVG-810
23.4
28.8
42.3
PDA-321
27.4
32.0
34.8
IRDⅡ
37.0
41.0
48.0
RVG
40.0
43.8
50.0
IRDⅢ
47.0
53.0
TI value
Mesh Size

4. Crystal Shape Poly vs Single crystal IRD-F IRD-II IRD-III IRD-H IRD-F
(140/170mesh)
Poly Crystal 5%
52%
IRD-III
IRD-H
73%
90%
95%
27%
48%
10%
IRD-F
IRD Ⅱ
IRD Ⅲ
IRD-H

5. Morphology (IRD-F)
IRD-F
RVG-810
PDA-211

6. Applicazioni Tenace WC+ Steel IRD-H WC + PCD IRD-III Durezza IRD-II
CSG
PDA-446
WC + PCD
PDA-433
IRD-III
RVG
Durezza
IRD-II
SPR
PDA-321
RVG-800
PDA-311
WC, PCD/PCBN
Friabile
PDA-211
IRD-F
RVG-810
Cermets, Ceramics
Poly
Single
Forma

7. Coated IRD Products Nickel coatings Item N NS New coating Element Ni
Cu, Ag..
Morphology
Cluster
Spiky
Metal Weight %
30, 56, 60 56 50
Available mesh size
80/100 ~ 400/500
Nickel coatings
Products
Metal wt %
Density (g/cc)
IRD-II, III, F, H -
3.52
IRD-II N30
Nickel 30 %
4.22
IRD-III N30
IRD-II N56
Nickel 56 %
5.20
IRD-III N56
IRD-FN
IRD-HN
Net (ct)
Gross (ct)
1,000
1,429
2,273

8. N coating & NS coating N NS Cluster type Spiky type IRD II N56
IRD II NS56
IRD II NS56 NS

9. Available size US MESH FEPA IRD Ⅱ IRD III IRD-F IRD-H BARE N30 N56 N
80/100
D181 ◎
100/120
D151
120/140
D126
140/170
D107
170/200
D91
200/230
D76
230/270
D64
270/325
D54
325/400
D46
400/500
D40

10. Case Study

11. Tungsten Carbide Grinding
Area
Korea
Industry
Part Name
Operation
Surface Grinding
Workpiece Material
P20E (Tool Grade, HRc 76~78, WC 2㎛)
51WC-8(2TaC-1NbC)-32(7WC-3TiC)-9Co
Wheel Specific
Resin (Phenol)
1A1, Φ150mm, Concentration 100
Diamond & cBN
170/200
Process Parameters
Wheel Vs : 1,696m/min (28.3m/s)
Table speed : 14m/min
Depth of cut : 0.025mm
Feed rate : 80m/min
Results
Remark
100%
95%
98%
111%
104%
51%
50%
43%
31%
IRD II-N56
IRD III-N56
RVG-W
IRV-NP
PDA-311NX
G-ratio
Power Performance

12. Tungsten Carbide Die Grinding
Area
Korea
Industry
Part Name
Die
Operation
Cylindrical Grinding
Workpiece Material
WC + 13%Co, Φ320mm
Wheel Specific
Resin (Polyimide)
1A1, Φ305mm
Diamond & cBN
IRD-III N56 140/170
Process Parameters
Wheel Vs : 1,500m/min
Workpiece Vs : 30~38m/min
Depth of cut : 0.07mm
Feed rate : 40m/min
Results
Remark
143%
113%
101%
100%
G-ratio
Removal Rate
Power
IRD-II N56
IRD-III N56

13. Tungsten Carbide Die Grinding
Area
Korea
Industry
Part Name
Die
Operation
Cylindrical Grinding
Workpiece Material
WC + 13%Co, Φ320mm
Wheel Specific
Resin (Phenol)
1A1, Φ305mm
Diamond & cBN
IRD-III N56 140/170
Process Parameters
Wheel Vs : 1,724m/min
Workpiece Vs : 32.2m/min
Depth of cut : 0.05mm
Feed rate : 80m/min
Results
Remark
100%
111%
78%
IRD II-N56
RVG-W
G-ratio
Power Performance

14. The amount of accumulated material removal (cm
Customer Test Result 2 4 6 8 10 12 20 30 40 50 60 70 80
IRD III-N56
PDA-321 N55
RVG-W
Grinding Force (N)
The amount of accumulated material removal (cm 3 )
Area
Japan
Industry
Part Name
Operation
Traverse Grinding
Workpiece Material
Tungsten Carbide (K-20)
Wheel Specific
Resin (Phenol)
175D – 3X – 6T – 50.8H
Diamond & cBN
IRD-III 230/270
Process Parameters
Wheel Speed Vs : 1,540m/min
Depth a : 0.020mm
Table Speed F : 10m/min
Results
Remark

15. Grinding Speed (sec/ea)
PCD Insert Grinding
Area
Korea
Industry
Part Name
PCD Insert
Operation
Tool Grinding
Workpiece Material
PCD (coarse Grade)
Wheel Specific
Vitrified
Diamond & cBN
IRD-II, IRD-III 400/500
Process Parameters
Wheel Speed= 1,800rpm
Depth a= 1.5mm/min
Table Speed F=N/A
Results
IRD-III : Long tool life
IRD-II : High grinding speed & low chipping
Remark 31 25 22 30 15 20 19 18
STD
IRD-II
IRD-III
Wheel Wear (um/ea)
Grinding Speed (sec/ea)
Chipping (um)

16. Customer Performance Test
Area
Japan
Industry
Part Name
Operation
Plunge Grinding
Workpiece Material
Tungsten Carbide
Wheel Specific
Resin (Phenol)
175D – 3X – 6T
Diamond & cBN
IRD-FN 230/270 vs. RVG890
Process Parameters
Wheel Vs = 1,540m/min
Depth a=0.02mm/path
Table Speed F=10m/min
Results
Remark 5 10 15 30 40 50 60 70
Grinding Force (N)
IRD-FN
RVG 890
Volume Removed (cm 3 )
200
150
Grinding Ratio
100 50
IRD-FN
RVG-890

17. Customer Performance Test
Area
Japan
Industry
Part Name
Tungsten Carbide
Operation
Machine : Okamoto PSG52DX
Vertical
Workpiece Material
Tungsten Carbide (K20)
120*100*4mm
Wheel Specific
Resin
Φ150-8U-Φ50.8H, SDC140N100BS40
Diamond & cBN
IRD-III N56 140/170
* Competitor : PDA311N55
Process Parameters
Wheel Vs = 1600m/min
Depth a=0.02mm/path
Traverse speed F=15m/min
Coolant = Chemical solution 5%
Results
연삭저항 : 정상상태에서 IRD-III가 기존품(standard) 대비 10% 높다.
휠마모 : 연삭비로 IRD-III가 50% 높다
표면조도 : IRD-III가 25% 작다
가공후 지립관찰 IRD-III의 파쇄 지립이 적다
Remark

18. A<B<C<…<J
Cermet Grinding (Cu Coating)
Area
Japan
Industry
Cutting Tool
Part Name
Cermet Insert
Operation
Tool Grinding
AP-50 (WAIDA MFG Co., Ltd)
Workpiece Material
High Toughness Cermet (TNMA331)
Wheel Specific
Resin Bond
Cup Wheel Type
Diamond & cBN
IRD-C50
Process Parameters
Wheel Vs = 1500m/min
Traverse Speed : 10mm/min
Results
10개의 Tip 가공. #1~#10 가공 시, 연삭력이 저하되면서 Δ(d0-d)가 증가함. 기존 Cu 코팅 사용 Wheel은 Δ가 지속적으로 증가하지만, 당사 Cu 코팅 사용시 Δ가 거의 없이, 일정한 연삭력 유지
Remark
#1: d=A
#2: d+ Δ(d2-d)=B
#3: d+ Δ(d3-d2)=C …
#10: d+ Δ(d10-d9)=J
A<B<C<…<J
A≒B≒C≒ … ≒J Δd 52
100
144
Competitive
IRD-C50 97
치수변화
Wheel Wear
Grinding Power
Competitor
IRD-C50