[Project 3] Dickson T1 Tool Holder

Probably a little adventurous for someone at my level, but I do so like a challenge.

From back to front;

• Stock
• Rough-cut Part
• OEM Part

Part milled to size:

Tool holding slot being milled with a 10mm 2-flute Carbide titanium nitride (TIN) coated HSS cutter:

Edited By Lee Jones 6 on 22/05/2020 07:53:50

Bump in the road.

Looks like the cutter was pulled into the work on the last pass. Typical!

Multiple failings on my part:

• A 10-11mm collet was used (should have used 9-10mm)
• The collet was not properly inserted/clicked properly into place (at least not intentionally!)
• The collet needed de-burring

Discussion HERE.

Edited By Lee Jones 6 on 22/05/2020 07:58:42

Marking out for the 'V' slots.

Discussion for cutting the slots HERE.

Tilting the head (first time I did this).

As you can see, I do not have an accurate way of measuring angles.

Plan for [Project 86] is a Sine Bar/Plate.

First cut:

One side done (look under the OEM Part):

Both sides done (looks okay to me):

Offering up to the tool holder. Can't see how it fits until we mill part of the 'T' slot out.

Edited By Lee Jones 6 on 22/05/2020 08:24:15

Tramming the head back in to 0° (vertical):

How does 0.1mm over 480mm sound?

So 1mm over 4800mm (4.8m)?

After making the first one successfully, will you be making them in a gang of 3,4,5?

Much quicker, then saw off to length/width.

Looks like a good start so far.

Yes, that is the plan. I can squeeze 4 in if I do it this way.

However, I'd really like to be able to cut the 45 degree 'v' slots on the X, then I could cut more at a time.

Still haven't figured out a way to do that yet.

As nobody else has answered from last night I get about 1/10th of that in X&Y eg 0.003mm in 140mm on a Chinese machine.

I'll go beat it a few more times with a rubber mallet.

It was dialed in until I bolted the head down.

You just need to see how much it moves when you tighten it down and then set it to compensate.

This is a drawing of a standard toolpost using a screw with a plain shank to check sizes from to make sure that the clamp mechanism works the same on all replacement pieces.

David

Sorry David, I'm not sure I understand.

NB: This is the smaller T0 size holder, right?

Lee,

Congratulations on having a go, that's the way to learn. I am not trying to belittle your efforts but manual marking out will not be accurate enough.

The 45 degree must be correct, all 4 faces of the Vs need to be in contact, the distance betwen them must be spot on.

I have made several for special applications but then my machines have all got DRO facilities. It is unlikely you will be able to file and fit with sufficient accuracy, but you can always try.

Good luck

Lee,

Special application as mentioned. Variable angle screw cutting insert holder.

Edited By KWIL on 22/05/2020 15:08:14

What was your method for cutting the 'v's?

Block accurately set up at 45 degrees and left fixed for both Vs. Checked with DRO system (ie slope is 1 in 1). One V cut with mill, then vertical and horizontal off sets for the next V (also read from DRO). Second V cut.

Apologies Ken, but what is 'block'?

Don't suppose you took a picture?

Block of metal you are making the holder from.

Maybe quill could elaborate on his holding methods.

Ah, I thought 'block' was the holding method (like 'v' block). Thanks for clarifying.

Yes, that's what I'm after. How did you mount it at 45 degrees?

Lee, did you see this by John Baron on the Cutting a 45 degree V thread page 1? There was also a suggestion somewhere to cut a narrow slot first then cut the vee. This is how some of the purchased ones I have had their vees cut (the slot that is, not the 45 degree cutter part).

Martin C

Hi Lee, Guys,

Whilst your picture shows one way of getting a 45 degree angle, its not a good way of holding work for milling. My recommendation would be to buy a proper inverted cutter and secure the work to the mill table properly. At a pinch you could use a 45 degree HSS or carbide countersink and take it easy with the cut.

Edited By John Baron on 20/05/2020 14:58:32