Miller vertical travel

Miller vertical travel

This topic has 5 replies, 4 voices, and was last updated 23 November 2011 at 02:34 by alan frost.

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22 November 2011 at 18:56 #5766
Brian Dickinson 2
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@briandickinson2
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22 November 2011 at 18:56 #78350
Brian Dickinson 2
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@briandickinson2
I have a Major Milled. Its one of the Nu tool, Warco etc makes.

The vertical adjustment of the head is achieved by loosening the locks and winding the handle. All fine if you are not in the middle of a cutting sequence.

Has anyone, devised or made a modification to stop the head from swinging during this action, either by putting a key way in the column or other idea?

Brian
22 November 2011 at 19:04 #78351
JasonB
Moderator
@jasonb
Try this post for starters, teh laser method seems favotite

http://www.model-engineer.co.uk/forums/postings.asp?th=46120
22 November 2011 at 19:19 #78352
Brian Dickinson 2
Participant
@briandickinson2
Thanks for that, I thing i like the vertical column idea unless i can dismantle it and fit a keyway in the column.

The lads at work would be able to put the key in for me and i am sure i can find someone to broach key way in the casting for a few beers.

Bri
22 November 2011 at 22:40 #78374
David Littlewood
Participant
@davidlittlewood51847
Brian,

In the 1950s a clever gent by the name of David Urwick invented a triangular gib key for precisely this purpose. It was described in ME several times from then to 1980 (15 August 1980, page 1013). There is a brief description in “The Machinist’s Second Bedside Reader” by Guy Lautard, page 68 (available from Camden). It would though require a certain amount of skill to convert your milling machine in this way, as you have to cut a triangular keyway in the bore of your milling head.

David
23 November 2011 at 02:34 #78385
alan frost
Participant
@alanfrost17805
Just checked my memory by re-reading Guy Lautard. Sure enough he gives 3 ways of making this triangular keyway , the second of which is the cheapest namely “chip it out with a cold chisel and finish by filing”. He does go on to say “few men today have the skill to do this “

I do have a 4th way of achieving this which I detail in a post entitled ” CNC help-non-urgent” on the Homeworkshop.org forum.

For the curious the other 2 ways Lautard lists are

1. With a shaper,planer or slotter

2 Broaching with a special broach

Neither as interesting as chiselling, or my method.

Rgds, Alan
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