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Allied Machine & Engineering

Reaming Overview Lead-in Angle InformaƟon

Straight Flute Lead-in

Angles

Chip EvacuaƟon

DescripƟon

A

Lead-in can be used to improve finish.

45°

8°

F

Can be used for stock removal at the boƩom of the hole. Reduce the feed by 40% of the values on the recommended cuƫng data pages.

90°

G

Standard and suitable for most materials.

Straight

45°

L

May provide improved straightness. Reduce the feed by 40% of the values on the recommended cuƫng data pages.

75°

N T V K

Ideal for through holes. It is possible to increase the feed up to 100% of the values on the recommended cuƫng data pages.

20°

Suitable for Ɵtanium based alloys.

30°

Suitable for most materials and increases tool life.

45°

Excellent at breaking small chips that are easy to evacuate in blind-hole applicaƟons. Requires 50% increased feed rate, which will result in reduced tool life when compared to other leads.

80°

0.10x45°

Helical Flute (Right-Hand) - Blind-hole Applications Only Lead-in Angles Chip EvacuaƟon

DescripƟon

E

Standard and suitable for most materials.

25°

M

May provide beƩer penetraƟon rates in steels over 200 BHN.

45°

Excellent at breaking small chips that are easy to evacuate in blind-hole applicaƟons. Requires 50% increased feed rate, which will result in reduced tool life when compared to other leads.

Helical

K

80°

0.10x45°

Helical Flute (LeŌ-Hand) - Through-hole Applications Only Lead-in Angles Chip EvacuaƟon

DescripƟon

E

Standard and suitable for most materials. NOTE: Through-hole applicaƟons only.

25°

M

May provide beƩer penetraƟon rates in steels over 200 BHN. NOTE: Through-hole applicaƟons only.

45°

Helical

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