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Thread Cutting Tools 170

Overview – Machine thread drills

1 Cutting Tools

Thread type

G

G

UNC

UNC

UNC

UNC

UNF

UNF

Colour ring

yellow

blue

yellow

yellow

green

green

yellow

yellow

Order No.

1745

1766

1768

1770

1746

1747

1772

1774

Nr. 2–56"– 1–8"

Nr. 4–40"– 1–8"

Nr. 4–40"– 3/4–10"

Nr. 4–40"– 7/8–9"

Nr. 10–32"– 1–12"

Nr. 10–32"– 1–12"

Threaded section

G 1/8"– G 1"

G 1/8"–G 1"

For through threads

≤ 3 x D

≤ 3 x D

≤ 3 x D

For blind holes

≤ 3 x D

≤ 3 x D

≤ 3 x D

≤ 3 x D

≤ 3 x D

Type/form

NR 40/C

INOX R 40/C

N/B

NR 40/C

N/B

N/C

N/B

NR 40/C

Material

HSS-E

HSS-E

HSS-E

HSS-E

HSS-E

HSS-E

HSS-E

HSS-E

Tolerance zone

ISO 228

ISO 228

2 B

2 B

2 B

2 B

2 B

2 B

Surface

steam

steam

steam

TiCN

bright

bright

bright

bright

Page

1/201

1/202

1/203

1/203

1/204

1/204

1/206

1/206

Material group

Steels up to 850 N/mm 2 Steels up to 850 N/mm 2 Steels up to 850 N/mm 2

C

C

C

C

C

C

C

C

C

Steels up to 42 HRC

Steels up to 52 HRC

Steels up to 56 HRC

Steels up to 60 HRC

Hard machining over 60 HRC Stainless and acid- resistant steels (INOX) Ti steels, Ti alloys, special steels

C

Cast iron materials

Al, AI and Mg alloys

C

C

C

C

C

C

C

Copper, brass, bronze

C recommended

U suitable

V limited suitability

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