Home
    Introduction
    News
    Dåseberga Gardens
    Dåseberga Model Rail Road
    Dåseberga Mech. Workshop
        Benches and Storage
        Hand Tools etc.
        My Machines
        Workshop Projects
        Links & Litterature

 

 

 

Project MJ03 - Quick Change Tool Post

 

Getting tired of keeping track of all shims between the turning tool and the tool post, I decided that it was time to do something about it. A fixed toolpost and a number of holders that can be set to center hight and not having to cahnge them will be ideal.

 

Following a search-around I found a simple enough type to make in my them limited workshop. It is based on the "Norman Patent" type design which is built from a rigid post on the cross slide and the tool holders are secured to the post using a clamp screw.

 

This solution was sketched up and I found a way that would work for me. I also had some readily suitable material. First out was the toolpost then the holders. The post was designed as below.

 

 

As can be seen The post have a foot wider than the post itself to provide a better stability. I also added a small "button" that is fitted under the foot and into the T-slot to prevent the post from rotating under load. The height was made a bit higher that the existing toolpost to be sure that any foreseeable type of holder can be accomodated.

 

 

Time for the tool holders. I made them as small yet simple as possible to make. The idea was to make a larger number of holders to fit different tools. The total number turns out to be quite big, see below.

 

  • Ordinary straight holders - ~10 pcs
  • Boring tool holders - 3 pcs
  • Knurling tool holders - 2 pcs 
  • DTI holder - 1 pcs
  • Ball truning holder - 1 pcs

 

This makes for close to 20 holders just to cover the basic need! A bit to do. The basic shape looks as below. The basic block and the measures for straight and boring tools.

 

I quickly made a few while waiting for the proper material to arrive. I use standard BMS here. The type below is for the thin (1.5 mm) blade parting tool holder.

 

Then I had a piece perfect for making a straight knurling tool holder.

 

 

Generally, the Norman Patent type tool holder is very good for batch jobs.

 

  1. Cut the appropriate number
  2. File/turn to measure
  3. Put the central hole in position
  4. Drill and thread the set screw hole
  5. Drill and thread the tool holder screw holes
  6. Slit the holder so it can be clamped to the toolpost
  7. Drill/Mill/Turn the tool slot.

 

No complicated jobs at all but gives good preactice. It all turned out well and now I have a good set of tool holders and the QCTP system works beautifully.

 

 

 

daaseberga.se © 2012 -   • Privacy Policy • Terms of Use

www.daaseberga.se