Acetal/POM Machining Overview

Acetal or POM is a very common and widely used engineering plastic. It shows good mechanical properties, self lubricating, good machinability, and good dimensional stability. This material do not need extra preprocess when machining it. Also the carbide bit is recommended and should always kees bit sharp.

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Acetal/POM Machining Guide

POM Sawing

Material	Rotate Speed [rpm]	Circular Pitch
Acetal Virgin	2800~3000	31~38
Acetal Modified	2400~2800	20~24

POM Drilling

Material	Number of Teeth	Helix Angle	Approach Angle	Cutting Speed [rpm]	Feed Force [mm/r]
Acetal Virgin	Z2	25	90	50~150	0.1~0.3
Acetal Reinforced	Z2	25	100	80~100	0.1~0.3

Note: Only for Keward Plastics.

POM Milling

Material	Number of Teeth	Cutting Speed [rpm]	Feed Force [mm/r]
Acetal Virgin	Z2~Z4	300	0.15~0.5
Acetal Reinforced	Z2~Z4	80~150	0.05~0.4

POM Turning

Material	Relief Angle	Approach Angle	Corner	Cutting Speed [rpm]	Feed Force [mm/r]
Acetal Virgin	6~8	0~5	45~60	300~600	0.1~0.4
Acetal Reinforced	6~8	2~8	45~60	80~150	0.1~0.5

Note: Only for Keward Plastics.

Acetal/POM Heat Treatment

Material	Heating	Keeping	Cooling
Acetal	3h heating to 90℃, then 3h heating to 155℃	1h/10mm thickness	cooling to 40℃ at speed of 20℃/h

Note: Only for Keward Plastics. The heat treatment above is a rough numbers, and only suit for the components which the thickness is less than 50mm. If the thickness is larger than 50mm, Please Send Us Email.