Quick change toolpost

The problem was the tool holder was not tightening properly and this was due the tool holder not sitting close enough to the tool post piston

To clarify the tool holder was machined NOT the tool post

Edited By petro1head on 15/10/2018 12:07:41

Now sorted so concider this closed

Thanks for everyones help

Petro,

So how did you machine the faulty toolholder? With an endmill, or do you have access to a surface grinder?

Have been following the thread with interest as my parting tool holder suffers from the same problem, so I'll be looking to do the same (obviously once I've checked measurements, etc.).

Regards Tom

Just used an end mill

Apoligies for being way too late now but I had the same issue with a 'pack' of 5 holders. Had to machine off some of the faces as above to make things fit.

I'd had them sitting around for a couple of years hence not sending them back, but cost a few carbide tips to make things ok, but really speaking I shouldn't have needed to do anything in the first place ?

Paul

Edited By HasBean on 15/10/2018 17:06:21

Meant to say end mill was HSS

Petro,

Many thanks.

Tom

Hi just had time to look at my toolholders and I have the same problem that the extra toolholders that I bought are not clamping properly as the inside of the slot for the clamp button is 0.75mm thicker and the handle isn't rotating as much as the original ones. No wonder that the part of tool comes loose sometimes. I clamped a pair together and lined up clamp faces to show the step.

David

Edited By David George 1 on 16/10/2018 17:49:47

Edited By David George 1 on 16/10/2018 17:51:03

Glad I came across this thread, I have an issue with the clamping of my tool holder the tightening of the holder seems to go too far and it will go past the tight point and then loosen off the holder.

I will now have a good look at it to see if I can see what's causing it, I thought it was poor quality but maybe I can fix it.

I'm afraid I still don't quite understand this.

Are we saying that cam lock devices have a 'sweet spot', and don't lock reliably in the early stage of rotation? If so, then that doesn't tally with my own experience.

Hi I have experimented on one of my toolholder by milling the location face as I didn't like reducing the undercut on the holder. I milled off 0.5mm per face with a carbide cutter and the difference is totally different and I feel more secure with the toolholding properties

David

David,

Was that 0.5mm off the horizontal face only (as seen in your photo), or did you mill the corresponding short vertical face as well (to the left of the cutter in your picture)?

Just asking for future reference as I'll need to do similar.

Regards Tom

Hi it was from both faces I blued it out after and all four faces made contact on the toolpost, the large area and the smaller area. I calculated that the distance out was 0.7mm and that calculates at 0.5mm at 45 degrees you need to measure the difference between an original and a new one on the post and use that to calculate the cut size.

David

David,

Great.

Many thanks.

Tom