• MMS Youtube
  • MMS Facebook
  • MMS Linkedin
  • MMS Twitter
10/15/2018 | 1 MINUTE READ

Helical Cutter Delivers High Metal Removal Rates, Low Cutting Forces

Facebook Share Icon LinkedIn Share Icon Twitter Share Icon Share by EMail icon Print Icon

Kennametal’s Harvi Ultra 8X helical milling cutter was designed to meet high metal removal needs in aerospace machining as well as to provide machinists with a tool that can withstand higher cutting speeds but generate lower machining forces.

Kennametal’s Harvi Ultra 8X helical milling cutter was designed to meet high metal removal needs in aerospace machining as well as to provide machinists with a tool that can withstand higher cutting speeds but generate lower machining forces. According to the company, the Harvi Ultra 8X can predictably remove 20 cubic inches (328 cm3) of Ti-6Al-4V per min. while attaining 60 min. of tool life per cutting edge.

Several design features enable the cutter to accomplish this. A double-sided yet positive rake insert that delivers the lowest cost per edge possible and simultaneously reduces power consumption by up to 50 percent. The AlTiN+TiN PVD coating provides robust resistance to thermal fatigue, while Kennametal’s high-performance KCSM40 carbide grade provides longer tool life. The cutter body is constructed of a higher-quality steel for improved stiffness and rigidity under high cutting forces. A BTF46 (bolt taper flange) connection provides high deflection resistance compared to traditional shell-mill type holders. The variable helix design breaks up the harmonics that lead to chatter, further improving tool life, part quality, and throughput. Using 12- and 10-mm inserts also reduces vibration, as their smaller size means more inserts in the cutter body, more inserts engaged in the workpiece and more inserts to absorb the pounding of a heavy machining operation.

Precision through-tool coolant nozzles direct cutting fluid where it is needed most. An enhanced flute design promotes maximum chip evacuation. Oversize M4 Torx Plus screws provide greater insert stability. The option of a KM4X adapter brings greater toolholding stability. Specially-prepared insert edges optimized for the KCSM40 grade are said to extend tool life. Corner radii from 0.8 to 6.4 mm are said to expand the number of possible cuts the Harvi Ultra 8X can make.

Hand holding a crystal ball

We’d rather send you $15 than rely on our crystal ball…

It’s Capital Spending Survey season and the manufacturing industry is counting on you to participate! Odds are that you received our 5-minute Metalworking survey from Modern Machine Shop in your mail or email. Fill it out and we’ll email you $15 to exchange for your choice of gift card or charitable donation. Are you in the U.S. and not sure you received the survey? Contact us to access it.

Help us inform the industry and everybody benefits.

RELATED CONTENT

  • Drill And Bore With A Face Mill

    Cutting holes by interpolating a face milling cutter may be a better process choice for many rough and even finish boring operations. Software improvements and better cutter designs allow expanding use of the versatile face mill for hole making.

  • Where Dry Milling Makes Sense

    Liquid coolant offers advantages unrelated to temperature. Forced air is the fluid of choice in this shop...but even so, conventional coolant can't be eliminated entirely.

  • A Practical Guide To Presetters

    Tool measurement devices help shops save time, control runout and improve tool management.

Resources