30 Int to Morse No. 2 adaptor

I understand clearly now. Thank you for the clarification Bob.

Ketan at ARC

There is not a lot of clearance between the top of the Morse taper and the start of the slot in the adaptor that the tang engages with. As you suggest a (very) shallow hex flange might be OK, I also consedered making a short length of 3/8" BSW internally threaded M6 and with a screwdriver slot that would allow the insert to be retrieved if it fully entered the Morse taper.

Adaptor from ARC already on order!

Bob

I decided to visit the warehouse to have a look at the said products.

Took some pictures which are presented below.

You were right about the tang type adapator. the hole is indeed around 6mm, so impossible to get 3/8" Whit drawbar through it:

On opening the box which was supposed to contain ISO/INT30 to MT2 adaptor (drawbar type), I discovered that we had BT30 type instead!.. Left message for Ian and team to check the stock in our warehouse next door on Monday.

BT30 will fit INT30/ISO30 taper, but INT30/ISO30 will not fit in BT30 taper mills. So in your case, the BT30 adaptor will be fine. However, after checking our stock, Ian or a member of our team will give you a call to see how you wish to proceed.

Then I put in a MT2 boring head arbour into the BT30- MT2 drawbar type adaptor, and used a 3/8" drawbar to see if it will go through without difficulty... and this was fine.:

Thank you for raising my curiosity.

Ketan at ARC

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Which is what prompted my early-morning suggestion

… but presumably you didn’t like that.

MichaelG.

Ketan Many thanks for taking the time to check the adaptors. The BT30 to Morse No.2 adaptor looks ideal.

Michael I did look at the links you posted and there are indeed four threaded holes in the drive face of the mill spindle. It seems to me to be a lot of work to make a custom adaptor that would still require the Int 30 taper to ensure centralisation of the tooling when 'off the shelf' solutions are available. I think the drive flange on the Int30 taper would partially obscure the four holes so they are not ideally positioned to hold the tooling in place.

Bob

Just for information BT30 arbors are normally available threaded M12 or !/2"UNC and are termed quick change as it is usual to retain them with a pull stud fitted. My Emco F1 spindle is SK30 but the BT 30 are the same taper and dimensions. INT30 taper is identical but has the short parallel extension which is threaded for the draw bar.

Emgee

The BT30 to Morse No.2 adaptor arrived today. Fits perfectly! No problem with passage of drawbar. Many thanks to all who took the time to respond to my question and especially Ketan and the staff at ARCEurotrade. Excellent service.

Bob

Great result, Bob

Ketan should sell a truck-load of those

… there must be plenty of people with the same general requirement as you.

MichaelG.