MA Ford has recently introduced a new 278 Series end mills with some pretty dynamic improvements in the design of the tool over the 178 series.
Although the 178 series is a great tool, there where a couple of things that the folks a MA Ford realized about the 178 series that needed improvements in some specific cutting tool applications.
Here's some of the areas they looked at for improvement:
Initial offering from 1/4” to 1” (Metric 12, 16, 20mm)
Mirror neck blend neck relief for improved step milling finishes
Available in 4 lengths: Stub; Standard; Long; Extra Long
Available in popular corner radii: .015”, .030”, .060” and .120” radius depending on the diameter and 0.5mm, 1.0mm, 1.5mm, 2.5mm, 3.0mm, 4.0mm depending on the diameter
Offered with Altima Blaze (AlCrN) (designated “B” coat)
The 278 series features advanced CNC grinding technology that allows for the tooth widths to be uniform on all 5 flutes. Note the narrower tooth width on the 178 series.
The 278 series end mill features a face grind on square ended tools and smaller corner radius tools. This results in a much enhanced corner strength. Note the sharp corner on the 178 series.
The 278 series features what M.A. Ford calls a “radial gash”. The radial gash adds protection to the corner radius that adds strength and lengthens tool life
The 278 series features a mirror neck blend OD relief that transitions from the OD relief into the neck relief. This means improved part finishes &reduced witness lines. Note the additional grind on the 278 series.
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