Three flutes can be better than four. 3 Flute general design for machining stainless.

Close-up image of a selection of four Delta cutters with XRed coating.


Certain applications benefit from a high performance end mill that has three flutes. Often normally only available in a general design and for non-ferrous materials from other manufacturers, our Delta range fits the bill when machining stainless.

A very capable tool, Delta is designed to work in a wide range of component materials. The additional feature of extended reach increases the versatility of the tool. It is ideal for aggressive slotting, pocketing and ramping due to increased chip clearance and reduced harmonics.

When considering which tool to use, understanding the pros and cons of the number of flutes should be taken into consideration. The higher number of flutes generally allows a higher feed rate per tooth, but a high flute count means a larger core and smaller flute depth.

For example a three flute tool has a smaller core and larger flute space than an eight flute tool, providing more room for the chips to be ejected. Operations such as slotting and horizontal milling on driven tooling benefit from this tool.


  • Higher feeds & speeds
  • Higher wear resistance
  • Vibration suppression
  • Increased material removal rates
  • Efficient chip removal
  • Low cutting forces
  • Excellent finish
  • Can be remanufactured many times
  • High rigidity


  • Slotting
  • Side Finishing
  • Profile Milling
  • Ramping
  • Trochoidal Milling
  • Pocket Milling
  • Side Roughing
  • Helical Milling


  • M
  • P
  • K
  • N
  • S
  • H


For more information about Delta, Mirage and Mirage Super download our brochure

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Can’t find what you need in our standard Delta range? Simply provide your tool specification here and we will provide you with a quotation*
*Minimum of three order quantity
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Once you submit your tool specification, our team will review and supply a quotation via email for the quantity specified.

From approval of your order, dispatch is usually 2 to 3 weeks, with a priority service available at extra charge.

All bespoke tools are non-refundable.

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