Which spindle fitting on my milling machine?

[Danny SandersonParticipant @dannysanderson39808]

I have purchased a wonderful vintage Henry Milnes milling machine. My question is regarding the spindle fitment, It is morse taper 3 but it is recessed into a rectangular collar which mean standard MT3 tools will not fit. Does anyone know what this fitment is called? I did get a suitable ER30 collet with the machine which fits the spindle but I want to buy other tools. I have searched endlessly without finding any reference to this type of fitment without luck. Any advice is much appreciated. Regards Danny

[Danny SandersonParticipant @dannysanderson39808]

[Chris Evans 6Participant @chrisevans6]

I do not know of the Henry Milnes machine and I spent my 50 working years in the tool making trade. If you have an arbour that does fit take a picture or make a sketch with a few sizes and post on the forum. Someone will be along who has knowledge. Reading your other post welcome along to the forum, your interest in old side valve Fords is that E93A / 100E of the lovely V8s ?

[David Standing 1Participant @davidstanding1]

I assume you have read here? **LINK**

[OldironParticipant @oldiron]

You have probably checked this but its possible explanation.

If an ER30 collett fits and has a nut to hold it in the spindle I suppose it is possible that there is an adaptor still in the spindle. Is the drawbar holding in an adaptor ?. If no drawbar in place has an adaptor stuck in the 3MT spindle nose.

regards

[Jon GibbsParticipant @jongibbs59756]

Looking at the spindle diagram on lathes.co.uk the recess is clearly there. It seems quite a reasonable idea for completely preventing any possible MT slippage(?).

It might be sacrilege to suggest this but if the MT3 is simply recessed you could turn the square recess off (or at least reduced in depth) the spindle nose with a TCT lathe tool clamped to the milling machine bed?

Jon

[Danny SandersonParticipant @dannysanderson39808]

Struggling to link pictures from my phone. Here is a similar chuck – **LINK** the link to the lathes site above just about shows the shape of the spindle fitment. I work specifically with E93a engines. Thanks to everyone for helping with this. Danny

[OldironParticipant @oldiron]

As I said in my previous post. Looks to me like you have a ER to 3MT adaptor still in the spindle. This needs to be removed so you can use 3MT drills etc in the spindle. You cannot use taper shank tooling with the adaptor still fitted.

regards

[JourneymanParticipant @journeyman]

Could it possibly be a B&S taper, its somewhere between MT3 and INT30 but has driving lugs on each side?

Details ***HERE***

Edit: Sorry bit eager there the first picture in the link is actually a Kwik-Switch taper, the B&S one is further down the list and doesn't seem to have the lugs. The Milnes mill was however sometimes supplied with B&S taper apparently

John

Edited : over enthusiastic posting!!

Edited By Journeyman on 15/12/2017 11:53:46

[Danny SandersonParticipant @dannysanderson39808]

Thanks so far, definitely not an adapter it is the actual spindle. Not a b&s taper but a similar principle with a much larger rectangle collar rather than lugs.

[Ian S CParticipant @iansc]

Photos please Danny.

Ian S C

[Danny SandersonParticipant @dannysanderson39808]

Diagram of spindle.

**LINK**

[Neil WyattModerator @neilwyatt]

The Lathes.co.uk site clearly shows what Danny is describing, the MT3 socket is at the bottom of a rectangular recess.

Presumably this was intended as an extra safeguard against rotation, but it mean that most modern MT3 tooling won't fit.

Sacrilege to turn down the end of the spindle, but which is better a static museum piece or a tool that continues to earn its living.

We talked about 'Rolls Royce' lathes a while ago – Henry Milne's lathes and mills may well come into that category although I haven't seen one first hand.

Neil

[Danny SandersonParticipant @dannysanderson39808]

I have found a compromise with a couple of tools I needed which inucluded welding a mt2 tool into a mt3 adapter sleeve, this gave clearence of the cooler. The fact that I have an Er32 collet Chuck which fits the spindle and collar perfectly suggests that this fitment is available and I was curious what f it had a name. There is an er40 chuck on eBay with rhe same fitment but this is in India and is the only example of any tool with this fitment that I can find.

[davebParticipant @daveb17630]

It sounds similar to my Denbigh milling machine, the MT4 spindle nose is just visible on the lower right of the picture. Most of the tooling I have has the rectangular collar.

[Danny SandersonParticipant @dannysanderson39808]

Yes, sounds similar though your collar looks much more shallow.

[David George 1Participant @davidgeorge1]

I worked a SIP jig borer 2years ago and it had the same square hole fitting on to a Morse type shaft for the drills and small boring heads. The larger tooling also located on to the outside taper but were all held in by the same draw bar and fitted to the square hole to drive as well. All the tooling was sold in an auction separately to the machine so there most be some around for sale. Look for SIP borer tooling.

David

[Danny SandersonParticipant @dannysanderson39808]

Thanks David, I have looked up SIP borers and again they are not quite the same. This is proving to be something of a mystery.

[David George 1Participant @davidgeorge1]

Can you give us a picture of spindle nose and exsisting tooling with something in the picture to scale the size e.g. 6 inch rule.

David

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