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Can grooving be done with multiple flutes end mills?
A typical four-blade end mill is not recommended for grooving where chip pockets are narrow and a large amount of chips need to be ejected.
The two-blade end mill has a wide chip pocket and good chip discharge, so it is effective for grooving and other processes that require chip discharge.
References: number of flutes and Characteristics
| Less (A) | number of flutes | Many (B) |
| big | chip pocket | small |
| low | rigidity | high |
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 |
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| Grooving (A) is recommended |
Hole processing (A) is recommended |
Side processing (B) is recommended |
Recently, there are also four-blade end mills with good chip discharge that can also be grooved.
Reference: Four-blade end mill with good chip evacuation even in high-efficiency grooving "AE-VMS"