Sumitomo General Catalog 2025-2026

CBN / Coated CBN CBN Grade Guidance Recommended Cutting Conditions

Cast Iron

● Turning

Part Material

Recommended Cutting Conditions

Recommended Grades

Cutting Speed v c (SFM)

Depth of Cut a p (Inch) ≤ .039

Feed Rate (IPR)

f

Material

Standard (Hardness)

330

3,300

6,600

.0039 - .0197

BN7125 / BN7000 BNC8115 / BNS8125

1,650

6,600

FC200 to FC300 (HB ≤ 230)

.0039 - .0157 ≤ .0197 .0039 - .0394 ≤ .157 .0039 - .0197 ≤ .039 .0039 - .0314≤ .0787

Gray Cast Iron

650

6,600

BN500

650

2,310

BN7125 / BN7000 BNS8125 BNC500 BN7125 / BN7000

650

2,650

Alloy Cast Iron

(HB ≥ 200)

L

650

3,300

.0039 - .0157 .0039 - .0157

≤ .0197 ≤ .0236

FCD450

260 650

Up to FCD550

500

1,650

Ductile Cast Iron

FCD600

BNC500

.0039 - .0157 ≤ .0197

Up to FCD700

650 400

Vermicular Cast Iron FCV(CGI)

Q

BNC500

.0039 - .0157≤ .0157

650

1,650

Cutting Oil: Use wet. (BNS800 can also be used dry)

● Milling

Part Material

Recommended Cutting Conditions

Recommended Grade

Cutting Speed v c (SFM)

Depth of Cut a p (inch)

Feed Rate (IPR)

f

Material

Standard (Hardness)

330

3,300

6,600

BN7125 BN7000

.0039 - .0197

≤ .0197

2,650

6,600

FC200 to FC300 (HB ≤ 200)

Gray Cast Iron

.0039 - .0394≤ .1575

BNS8125

2,650

6,600

Cutting Oil: Use dry.

Performance

BN7000 / BNS800 / BN500 Gray Cast Iron Cutting Recommended Grade BN7125 / BN7000 / BNC8115 / BNS8125 / BN500 Gray Cast Iron Turning Recommended Grades BN7125 / BN7000 / BNC8115 / BNS8125 / BN500 Gray Cast Iron Turning Recommended Grades

● High Speed Continuous Cutting D High Speed Continuous Cutting D High Speed Continuous Cutting

● Interrupted Cutting D Interrupted Cutting D Interrupted Cutting

● Continuous Cutting D Continuous Cutting D Continuous Cutting

.0024 .0016 .0032 .0040 .0008 .0016 .0024 .0032 .0040 .0048 .0056 .0064 .0008

.0008 .0016 .0024 .0032 .0040 .0048 .0056 .0064

Conventional CBN

Conventional CBN

Breakage Fracture

.0118

Fracture

0.3

0.3

.0039

BN7125 Conventional CBN

0.1

0.1

BN7125

Ceramics

BN7125

Ceramics

D

Ceramics

Competitor's Solid CBN

D Competitor's Solid CBN

Competitor's solid product CBN

.0079

D D

D

0.2

0.2

D

D

BN500

D

BN500

BNS8125 BNS8125 Able to continue Able to Continue

BN500

D

D

.0019

D

BNS8125 Able to continue

D

0.05

D

D

0.05

.0039

D

0.1

0.1

D

D

D

D

D

D

D

D

0

40 80 120 160 200 Time in Cut (minutes) 20 40 60 80 100 Cutting Distance (km) 20 40 60 80 100 Cutting Distance (km)

0

25

50

75 100

0

Time in Cut (minutes) Cutting Distance (km) 1 2 3 4 5 6 Cutting Distance (km) 1 2 3 4 5 6 1.66 3.33 5 6.67 8.33 10 D

11.67

D

0

Time in Cut (minutes) 0 12243648607284 Time in Cut (minutes) Part Material: Cast Iron (Pearlite) Tool Cat. No.: 2NU-CNGA432 Cutting Conditions:  v c =2,650 SFM, f = .0059 IPR a p = .0079" Wet 0 12243648607284 Time in Cut (minutes)

0

7

0

0

7

Part Material: Cast Iron (Pearlite) Tool Cat. No.: SNG322 Cutting Conditions:  v c =2,000 SFM, f = .0118 IPR a p = .0197" Dry

Part Material: FC300 (Pearlite) Tool Cat. No.: SNG433 Cutting Conditions:  v c =1,650 SFM, f =.0117 IPR a p = .0059" Wet

BNC500 Recommended Grade

Recommended Grade

BNS800 / BN7000

Turning Ductile Cast Iron

Milling Gray Cast Iron

● Cast Iron Milling

● FCD450

● FCD700

.0024 .0016 .0032 .0040

3,300

3,300

BNC500

D

D

D

BN7000

BNC500

D BN7000 Conventional CBN

D

D

D

D

D

D

D

D

D

D

D

D

D

D

D

D

D

D

D

D

D

D

D

D

D

D

D

D

D

BN7000

BN500

BN500

.0008

330

330

D

0

132

264

396

526 658

0

33

66

100

.3

3

30

300

Time in Cut (minutes) Life Criterion v B max. = .0079”

Tool Life (ft. x 1000) Life Criterion v B max. = .0079”

Cutting Length (inches)

Part Material: FCD450 (Continuous Cutting) Cutting Conditions: f = .0079 IPR, a p = .0079 IPR" Wet

Part Material: FCD700 (Continuous Cutting) Cutting Conditions: f = .0079 IPR, a p = .0079 IPR" Wet

Part Material: FC250 (Pearlite) Tool Cat. No.: FMU4100R SNEW1203ADTR Cutting Conditions: v c = 5,000 SFM, f = .0079 IPR, a p = .0118" Dry

L8

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