HSS Router SFPM
Close
Login to Your Account
Results 1 to 5 of 5

Thread: HSS Router SFPM

  1. #1
    Join Date
    Sep 2010
    Location
    Anchorage, Alaska, USA
    Posts
    648
    Post Thanks / Like
    Likes (Given)
    236
    Likes (Received)
    125

    Default HSS Router SFPM

    Hi Guys...
    I was playing with some wood in the Haas and killed a pretty nice HSS end mill.
    Now, I am wondering the recommended SFPM for HSS cutters in various woods.
    I am guessing with my recent experience, it must be at or below 300 SFPM, but these days, nobody uses HSS... and I can't even find the wood guys that know...
    Thanks,
    Mark

  2. #2
    Join Date
    Aug 2012
    Location
    Pittsburg, KS
    Posts
    1,252
    Post Thanks / Like
    Likes (Given)
    130
    Likes (Received)
    558

    Default

    I don't know what the sfm is myself, but you may be having trouble more from the geometry of the cutter than how fast you are running it.

    Planers, shapers, molders all still use HSS knives, it is only if you are running huge volume or some nasty high wear material through them that it makes sense to go carbide or diamond.

    I have and still use HSS in my cnc router but it is on plastics as I have carbide on hand for wood.

  3. Likes snowshooze liked this post
  4. #3
    Join Date
    Jun 2001
    Location
    downhill from Twain\'s study outside Elmira, NY
    Posts
    11,059
    Post Thanks / Like
    Likes (Given)
    4132
    Likes (Received)
    3879

    Default

    The failure mode of HSS in wood, is heat accelerated chemical erosion. As opposed to abrasion.
    Many small HSS bits especially cutting in pockets, do not clear chips effectively, pack up, and die from the heat. Where they can actually cut a long time if the chips are expelled. E.G. 1/4" bits seem to die faster than 3/4" bits at the same depth and rpm, when the 1/4" is only 1/3 the sfm.

    Effectve airblast might help?

    Anecdotal - my pin router is 10,000 rpm high speed. bits do seem to last longer than in a hand held router, similar cuts, 18 - 22,000 rpms.

    HSS will not last in substrates with glue - plywood, MDF, other manmade boards or such with facings.

    smt

  5. Likes snowshooze liked this post
  6. #4
    Join Date
    Sep 2010
    Location
    Anchorage, Alaska, USA
    Posts
    648
    Post Thanks / Like
    Likes (Given)
    236
    Likes (Received)
    125

    Default

    Thanks!
    Yes, it is a heat problem.
    The chips don't absorb much.
    I don't want to run coolant on wood...
    Air blast... and routers make an awful mess.
    So, I guess I will run slow.

  7. #5
    Join Date
    Sep 2010
    Location
    Anchorage, Alaska, USA
    Posts
    648
    Post Thanks / Like
    Likes (Given)
    236
    Likes (Received)
    125

    Default

    I was just running in wood. Can't remember..
    Not MDF, plywood, any of that.
    Geometry... 1/2" Slot, 1/2" deep.
    Thanks!
    Mark


Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •