End mill – Bits with spiraled flutes, which can come in with many different tip shapes.
Flute – A groove on the cutting bit to allow for material to be ejected. Bits can have more than one flute, which increases the surface area of contact with the material.
Round groove / Juice groove / Bowl cutting bit – Has a semi-circle profile, which works well for carving rounded profiles.
Surfacing bit – Has a large cutting diameter, used to remove large areas of material at a shallow depth. This is used to flatten out material.
Tip / Flute shape (upcut, downcut, compression, straight, corncob) – The shape of the end mill you are using, which determines its application.
Flat end mills have a square tip. They can also have spirals (upcut or downcut), or be completely straight. These are good for general purpose milling, such as cutting out borders or straight profiles.
Tapered bits become more narrow at the tip, which allows for small details to be cut.
Ball nose bits are rounded on the tip, similar to round groove bits. They are used for reliefs and 3D carvings.
Upcut and downcut bits have opposite spiral directions, causing the material to be pushed either up or down respectively. Upcut bits are best for cutting materials that can melt onto the bit, such as plastics and aluminum, since these chips can be ejected out of the material. Downcut bits can be used for woods that can splinter easily, because they push the chips down which creates a cleaner finish.
Compression bits are a combination of upcut and downcut bits, with spirals in both directions providing a clean finish and also ejecting chips from the cutting surface.
Straight bits do not have any spirals, instead it has flat faces which run down the length of the bit. They are used for cutting plastics, woods and composite/laminate materials which are susceptible to fraying.
Corncob bits have a unique diamond pattern which allows for abrasive materials to be cut, suitable for composite materials such as PCBs and carbon fiber.
V-bit – Has a pointed tip in the shape of a ‘V’ and works great for cutting away as an engraving, making lots of different details especially for signs. They can also be used for inlays and chamfering and come in many angles such as 30°, 60°, 90°, and 120°.
WEIX TOOL, a reputable end mill & router bit supplier

WEIX has rich experience in supplying industrial-quality router bits for furniture factories, woodworking tool distributors, and manufacturing and metalworking industries companies across the world. If you’re looking to purchase quality end mills at affordable prices, or have questions about where to begin, please feel free to contact us. We’d be happy to take your call and discuss specifics with you.

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