Boxford VSL 5C Collet nose piece

[Roy BirchParticipant @roybirch29994]

Hello All

I made a 5C holder for my Clarkson yesterday and found it quite easy, everything was a good fit. I now want to make a 5C collet holder for my Boxford VSL, does anyone recommend what type of steel to use for this?

Also does anyone have the dimensions as in length of this piece?

Kind Regards

Roy

[Roy BirchParticipant @roybirch29994]

[Clive FosterParticipant @clivefoster55965]

I suspect our transatlantic friends would be reaching for an offset of 4140 for the job which seems to be their goto for something a bit better than simple mild steel.

Equivalent here would be 790M40 which is what you'd expect too get when buying under the obsolete EN19 designation.

Needs bit of care to get a nice finish.

Clive

Edited By Clive Foster on 23/05/2023 17:48:18

[Tony Pratt 1Participant @tonypratt1]

As per Clive above or mild steel.

Tony

[DC31kParticipant @dc31k]

Posted by Roy Birch on 23/05/2023 10:06:57:

I now want to make a 5C collet holder for my Boxford VSL..

Also does anyone have the dimensions as in length of this piece?

Discussion of this item here:

https://www.mig-welding.co.uk/forum/threads/boxford-vsl-spindle-adapter.109539/

Precis of the findings there: the lathe's spindle taper angle is the same as MT3 but the diameters are larger.

Same info., slightly differently formatted here:

http://www.wedgeneering.co.uk/Boxford%20Collet%20Adapter.html

—-

The length of the piece is influenced by the length of the 5C collet going into it. If it is too long (unless it has a counterbore), the draw tube will not screw on.

Edited By DC31k on 23/05/2023 20:01:36

[Roy BirchParticipant @roybirch29994]

Yes the taper in the LOO spindle is a parallel taper from MT3 enlarged, I did see Ian’s post regarding the making of this part at Wedge Engineering, I think his differs from the Boxford collet in that the original has a collar around the outboard end of the spindle to allow an ejection piece to be inserted, I assume that when you draw the collet in it can also draw the adapter in. I was looking for the diameter of the collar, the overall length including collar, and the gap between the end of the spindle nose and the collar, someone has already said that the collar is 11.1mm thick.

I have asked a good engineer friend who has said to make it out of mild steel, en1a or similar, the Boxford one is case hardened but I doubt I would have the need to go that far unless I am told different.

Many Thanks for the replies so far

Kind Regards

Roy

[DC31kParticipant @dc31k]

Posted by Roy Birch on 24/05/2023 08:14:25:

…the original has a collar around the outboard end of the spindle to allow an ejection piece to be inserted

There is a picture of the collared adaptor in the mig-welding link. Knowing the major diameter of the taper, you can scale the rest of the dimensions from the photo.

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