Thread Milling

THREADING | Solid Carbide and Indexable Thread Mills

Recommended Cutting Data | Imperial (inch) Indexable | AccuThread™ 856 | Neutral Rake

A

DRILLING

Recommended Feed (inch/tooth) by Cutter Diameter

3 flutes

5 flutes

6 flutes

Hardness (BHN) 100 - 150 150 - 200 200 - 250 85 - 125 125 - 175 175 - 225 225 - 275 125 - 175 175 - 225 225 - 275 275 - 325 125 - 175 175 - 225 225 - 275 275 - 325 325 - 375 225 - 300 300 - 350 350 - 400 100 - 150 150 - 250 250 - 350 140 - 220 220 - 310 135 - 185 185 - 275 185 - 275 275 - 325 150 - 200 200 - 250 120 - 150 150 - 200 200 - 220 220 - 260 260 - 320

Speed (SFM)

ISO Material

Machinability**

1.000 - 1.499

1.500 - 1.999

2.000 - 2.750

Free Machining Steel 1118, 1215, 12L14, etc.

Easy Easy Easy

765 595 425 765 595 510 425 490 425 380 340 490 425 380 340 320 390 340 300 510 425 390

0.0013 0.0013 0.0013 0.0013 0.0013 0.0013 0.0013 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0013 0.0013 0.0013

0.0017 0.0017 0.0017 0.0017 0.0017 0.0017 0.0017 0.0013 0.0013 0.0013 0.0013 0.0013 0.0013 0.0013 0.0013 0.0013 0.0013 0.0013 0.0013 0.0017 0.0017 0.0017

0.0021 0.0021 0.0021 0.0021 0.0021 0.0021 0.0021 0.0017 0.0017 0.0017 0.0017 0.0017 0.0017 0.0017 0.0017 0.0017 0.0017 0.0017 0.0017 0.0021 0.0021 0.0021

B

Low Carbon Steel

Average Average Average Average Average Average Average Average Average Average Average Difficult Difficult Average Difficult Difficult Average Average Difficult Difficult Difficult Difficult Difficult Difficult Difficult Difficult Difficult

1010, 1020, 1025, 1522, 1144

BORING

Medium Carbon Steel

1010, 1040, 1050, 1527, 1140

P

Alloy Steel

4140, 5140, 8640

C

High Strength Alloy 4340, 4330V, 300M

REAMING

Structural Steel A36, A285, A516

S High Temp Alloy

- - - - - - - -

- - - - - - - -

- - - - - - - -

- - - - - - - -

Hastelloy B, Inconel 600

Stainless Steel 303, 416, 420

D

Stainless Steel PH

M

17-4 BURNISHING

Tool Steel

H-13, H21, A-4

Cast Iron

Easy Easy Easy

575 525 490 425 400

0.0017 0.0017 0.0017 0.0017 0.0017

0.0026 0.0026 0.0026 0.0026 0.0026

0.0034 0.0034 0.0034 0.0034 0.0034

Grey, Ductile, Nodular

K

Average Average

Wrought Aluminum

30

Easy Easy Easy Easy

- - - -

- - - -

- - - -

- - - -

E

6061 T6

180 120

N

Cast Aluminum** up to 10% silicon

THREADING

Brass

30 - 125

NOTICE: Reduce feed and speed by 30% for tapered thread forms due to additional material removal *Refer to recommended pass chart on page E: 45 when referencing material machinability **Uncoated thread mills are recommended for cast aluminum applications

X

SPECIALS

E: 60

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