Rockwell 4800 Jointer
Close
Login to Your Account
Likes Likes:  0
Results 1 to 10 of 10
  1. #1
    Join Date
    Aug 2011
    Location
    Alberta, Canada
    Posts
    75
    Post Thanks / Like
    Likes (Given)
    1
    Likes (Received)
    1

    Default Rockwell 4800 Jointer


    I recently picked up a Rockwell 6" 4800 Jointer. I have lost significant time adjusting planer knives and was hoping I might be able to replace the cutter head to a more modern style which has self aligning knives?
    Any suggestions would be appreciated.

  2. #2
    Join Date
    Jul 2006
    Location
    rochester, ny
    Posts
    1,846
    Post Thanks / Like
    Likes (Given)
    367
    Likes (Received)
    510

    Default

    I'd put in a Byrd Shelix head. The carbide knives last for a long time, and it gets a great cut on highly figured wood.

  3. #3
    Join Date
    Nov 2006
    Location
    Camarillo Ca
    Posts
    432
    Post Thanks / Like
    Likes (Given)
    22
    Likes (Received)
    98

    Default

    I have an 8 inch Powermatic jointer. Setting the knives to project the same can be frustrating
    What happens is when you tighten the screws against the blade, they act like little cams moving the blade up or down.The only solution I have found is to sharpen them in the head. The same as on my planer.

  4. #4
    Join Date
    Mar 2009
    Country
    UNITED STATES
    State/Province
    California
    Posts
    4,681
    Post Thanks / Like
    Likes (Given)
    86
    Likes (Received)
    846

    Default

    On my jointer the adjustment screws had heads that were not completely flat. Thus a can action. I replaced the screws/nuts with some 316 inventory.
    I flattened the heads on the screws. I can get knives to almost .001 dead on. Still takes a lot of time.
    But not as much time when I sharpen the blades with a wet grinder with fixture.

  5. #5
    Join Date
    Aug 2011
    Location
    Alberta, Canada
    Posts
    75
    Post Thanks / Like
    Likes (Given)
    1
    Likes (Received)
    1

    Default

    Thank you for the replies.. I have dug into the Shelix head option but the initial cost was a little daunting.

    I am curious about how one would sharpen the blade while mounted in the cutter head?
    I’ve only changed the blades once and would like to simplify the process if possible.
    I have access to lathes and milllibg machines and could make basically whatever I’d need fixture wise.

  6. #6
    Join Date
    Nov 2006
    Location
    Camarillo Ca
    Posts
    432
    Post Thanks / Like
    Likes (Given)
    22
    Likes (Received)
    98

    Default

    You can set up a router with a cup grinding wheel. Lock your cutter head into position. Not great but it does make all the knives the same height. You may find something on utube to help you. On my 20 inch Oliver Jointer, I bolted my planer grinder on it, that worked well.

  7. #7
    Join Date
    May 2018
    Country
    UNITED STATES
    State/Province
    Pennsylvania
    Posts
    2
    Post Thanks / Like
    Likes (Given)
    0
    Likes (Received)
    0

    Default

    I have also the same problem with my Delta jointer. Did you resolve your problem?

  8. #8
    Join Date
    Oct 2010
    Location
    Maryland- USA
    Posts
    2,994
    Post Thanks / Like
    Likes (Given)
    1762
    Likes (Received)
    1989

    Default

    I am a big fan of the Tersa cutter head and knives.
    30 seconds to change out a blade and perfect every time.

  9. #9
    Join Date
    Dec 2012
    Location
    Se Ma USA
    Posts
    1,415
    Post Thanks / Like
    Likes (Given)
    108
    Likes (Received)
    800

    Default

    Tersa has single knife solutions. Had to get them wrong. Byrd or any of that type are a totally different thing. Nick a knife leaving a raised stripe? Replace or rotate just that knife. Tersa you can offset the knife a bit but be aware rebating on the jointer needs to be kept in mind. It is only a spendy option up front. Once you do it the first project you make will be a very nice walnut asskicker. Stand in front and pull hard on the chain. Your favorite boot shoots up and kicks you in the butt.

  10. #10
    Join Date
    Feb 2013
    Location
    Greenfield, MA
    Posts
    258
    Post Thanks / Like
    Likes (Given)
    44
    Likes (Received)
    46

    Default

    Quote Originally Posted by Scruffy887 View Post
    Byrd or any of that type are a totally different thing. Nick a knife leaving a raised stripe? Replace or rotate just that knife.
    Sounds good in theory, however unless the existing set of knives in the cutter head is all near-new when the nick happens, then rotating a single insert knife into position to provide a fresh cutting edge, when the rest are all dulled to some extent, will make for a situation where the new edge is cutting deeper than the rest and will leave a scallop in the surface, for some period of time. In that situation, the insert will also be taking a heavier cut than the rest and will dull more quickly than normal. And, then one also has the issue of keeping track of which insert was rotated, and which inserts have not been rotated, a problem the next time you go to rotate inserts.

    Changing insert knives on a cutter wider than 6~8" is not a task to be done quickly given the quantity involved, and if you are not fastidious about keeping the insert seats clean, and seating the inserts properly, then one can end up with problems. I would put it roughly on a par, time-wise, with replacing conventional knives.

    I am a fan of Tersa, but for anything other than softwoods the carbide knives are the only ones worth having, IMO. The carbide knives do have a steep up-front cost (which I feel more than reasonable considering how incredibly long the carbide knives last, even in wood known to decimate knives, like teak. Tersa offers quite good performance on figured woods due to the minimal knife projection from the cutter head. Would never opt for anything else, and I do have a Byrd shelix cutter for use on my shaper, so it is familiar to me. Byrd is not inexpensive and I gather the wait times for production have become quite long for certain cutter heads.


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
  •