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ALLIED MACHINE & ENGINEERING | RECOMMENDED CUTTING DATA

Recommended Cutting Data | Metric (mm) Indexable | AccuThread® 856 | Neutral Rake

Recommended Feed (mm/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 (M/min)

25.41 mm - 38.09 mm

38.10 mm - 50.77 mm

50.78 mm - 69.85 mm

ISO Material

Machinability**

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

Easy Easy Easy

233 181 129 233 181 156 129 149 129 116 104 149 129 116 104

0.032 0.032 0.032 0.032 0.032 0.032 0.032 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.032 0.032 0.032

0.043 0.043 0.043 0.043 0.043 0.043 0.043 0.032 0.032 0.032 0.032 0.032 0.032 0.032 0.032 0.032 0.032 0.032 0.032 0.043 0.043 0.043

0.054 0.054 0.054 0.054 0.054 0.054 0.054 0.043 0.043 0.043 0.043 0.043 0.043 0.043 0.043 0.043 0.043 0.043 0.043 0.054 0.054 0.054

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

Medium-Carbon Steel

1010, 1040, 1050, 1527, 1140

P

Alloy Steel

4140, 5140, 8640

97

High-Strength Alloy 4340, 4330V, 300M

116 104

91

Structural Steel A36, A285, A516

156 129 116

High-Temp Alloy

- - - - - - - -

- - - - - - - -

- - - - - - - -

- - - - - - - -

S

Hastelloy B, Inconel 600

Stainless Steel 303, 416, 420

Stainless Steel PH

M

17-4

Tool Steel

H-13, H21, A-4

Cast Iron

Easy Easy Easy

175 162 149 129 123

0.043 0.043 0.043 0.043 0.043

0.065 0.065 0.065 0.065 0.065

0.087 0.087 0.087 0.087 0.087

Grey, DucƟle, Nodular

K

Average Average

Wrought Aluminum

30

Easy Easy Easy Easy

- - - -

- - - -

- - - -

- - - -

6061 T6

180 120

N

Cast Aluminum** up to 10% silicon

Brass

30 - 125

NOTICE: Reduce feed and speed by 30% for tapered thread forms due to addiƟonal material removal *Refer to recommended pass chart on page 168 when referencing material machinability **Uncoated thread mills are recommended for cast aluminum applicaƟons

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