Mikron F75

Good morning guys.

I have recently purchased a Mikron F75 milling machine and I have started the process of stripping down and restoration, everything is going fine apart from removal of the spindle, I have loosened all bolts, screws and retaining rings but the thing will not come out or even move although it still has free movement to spin, any help on the process of removal would be greatly appreciated. Thanks Bill.

Bill - If this is the belt driven horizontal head. I tried for a long time to figure it out. In the end I converted it to something else. Not too helpful I know!!

Have you contacted David Samways at Anglo-Swiss Tools?

Thanks for the reply Rod,It is the horizontal head and every thing is fine I just want to get the spindle out to polish it. every thing about the machine is great, the build and finish is what you would expect from the Swiss. There must be someone out here that knows how to dismantle this thing.

Thanks John I have spoken to Anglo-Swiss but David said he has never had to remove the spindle and does not know how to do it nor can I find any literature on the subject.

I have added some pics in albums if any one would like to cast an eye over them and maybe have a suggestion.

I think the answer probably lies with that off-set square drive fitting in the cone pulley. Have you figured out it's purpose Bill?

loosen all the screws to disengage the pulleys from the spindle, the pulley will probably be on a long key so still cannot be turned independently

The main thing is the direction of removal, usually a spindle exits on the load side but that's with lathes

Then get a big hammer....

Edited By Ady1 on 25/10/2018 15:36:46

Given the oiling point in the small step of the pulley ... is there a backgear built in ?

MichaelG.

Yes it is an oil port and yes there is a 3-1 back gear in the large step.

The square bolt you refer to is released to engage the back gear that is located in the large step pulley and as far as i can see does not locate on the spindle

I have released every screw nut and bolt but there is no lateral movement at all, i have given it several gentle taps with a lead hammer but still no movement, I am reluctant to give it the big hammer treatment as often the result is irreversible.

.

Nice !!

MichaelG.

I suspect you have to undo the ring nuts with c-spanners in a co-ordinated manner as the spindle slowly edges left or right through whichever is the largest diameter hole...

But... if it ain't broke, why take it apart?

Bill,

It appears that the headstock is similar to that of the T90 lathe

... You may find more information about that.

MichaelG.

It's all about the finish, easier to polish the pulley off the head than on and once I know how to do it I can pass it on.

Yes all the heads on the T90 will fit the F75 and vice versa the only difference is the t90 heads tend to have 4 speed step pulley, but still cannot find any info on strip down.

Hardly a service manual, but ... The last few pictures on this page might help, a little:

**LINK**

http://www.lathes.co.uk/mikron/page4.html

MichaelG.

ooooh, scary bearings

They look like pultra 1590 ultra high precision bearings

1 Buy a manual

2 Consider not opening them up unless very very necessary

Edited By Ady1 on 26/10/2018 10:10:54