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Harrison Miling Machine Feed Nut

Help Removing

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isimbard brunel03/12/2017 20:42:59
6 forum posts

Good Evening Gents,

Could somebody please help me?

I am currently trying to remove the cross slide feed nut from the automatic feed gearbox of my Harrison mill, The problem that I am having is that having removed all four screws from the cover plate it will not come off! The plate is now free to rotate about the nut but there is no way that I can remove it. I cannot see any other screws etc. that might be holding it

I have the manufacturers 'parts list' with an exploded diagram but it looks as if the cover plate should just pull off .

Has anyone done this on their machine - I could really do with some help here as I really don't want to damage anything.


Thanks IKB

Brian Wood04/12/2017 16:47:10
1538 forum posts
35 photos

Hello IKB,

Welcome to the Forum. Others will know this machine, I confess I don't, but I wonder if the nut is a push fit in the housing and the cover plate a closing feature

If so, can you use the cover plate as an extractor by tapping outwards on its back in all four quarters to remove the nut?

Regards Brian

Edited By Brian Wood on 04/12/2017 16:47:36

David George 104/12/2017 16:54:09
377 forum posts
129 photos

Hi IKB Can you give us a clue like model No ... and or a picture of said BEAST.


isimbard brunel04/12/2017 20:29:00
6 forum posts

Hi Brian,

I can only get at the front of the assembly but I have tried to gently lever the cover plate off. As there is a worm wheel that drives the nut for power feed I am reluctant to try any harder for fear of damaging this. I have tried to add a scan of the relevant bit of the parts list. As I said yesterday it LOOKS as though the plate should just 'lift off'


Harrison ,as far as I am aware only ever made three types of milling machine. Horizontal Vertical and the Universal which was totally different to the other two.

I have the Horizontal fitted with the optional vertical head. .

Numbers are 14, 15 (x2), 16 and 17.

Part number 18 is rhe worm shaft and as far as I can tell the worm wheel on the nut is curved and wil stop the nut coming out from the front (or rear. I seem to remember seeing photographs of the nut/worm-wheel assembly with the nut being held into the worm wheel by a flange on the nut and bolts holding the whole thing together. I will try making an expanding mandrel tomorrow to get a grip inside the locating sleeve17 so that I can remove that to try delving further into the offending article.

Thanks chaps


isimbard brunel04/12/2017 21:05:08
6 forum posts

Beaten by a box of this new fangled electricity!!!!!!

Oldiron04/12/2017 21:53:06
198 forum posts
17 photos

WOW IKB Having seen some of your massive projects around the country I cannot believe you got beat by this tiny job. Mind you that's what happens in old age. smiley


Michael Gilligan04/12/2017 22:39:42
11054 forum posts
475 photos
Posted by Oldiron on 04/12/2017 21:53:06:

WOW IKB Having seen some of your massive projects around the country ...


Ah, but ... is this another example like Miluloyo/Mitutoyo, as recently discussed ?


Edited By Michael Gilligan on 04/12/2017 22:40:59

Oldiron05/12/2017 08:31:52
198 forum posts
17 photos

Aaah I have been duped by an imposter. .

"reminder to ones self, check spelling next time"


not done it yet05/12/2017 11:51:18
1801 forum posts
11 photos

Enough of the pith taking. Member is new to the forum.

I would think, if there is also a power feed to that leadscrew/nut, there will likely be other bits that may need to be removed, like worm drive components, before the thing can be separated.

A pic of the offending area parts would be good as there are not so many of these machines around, I suspect. Pics of the actual machine are likely no more advantageous than those on lathesdotco.

Michael Gilligan07/12/2017 10:09:03
11054 forum posts
475 photos

As 'not done it yet' has not done it yet ...

I am bumping this thread in the hope that someone can advise isimbard.


isimbard brunel15/12/2017 17:35:08
6 forum posts


Michael Gilligan16/12/2017 09:25:31
11054 forum posts
475 photos
Posted by isimbard brunel on 15/12/2017 17:35:08:



Yes, apparently it was ... but at least I tried.


SillyOldDuffer16/12/2017 10:03:29
2793 forum posts
563 photos

'Bump' is a better way of issuing a reminder. Anyone unused to 'industrial language' might find WAWOFT offensive.

Possibly no-one on the forum can answer the question - it does happen. NDIY asked for pictures and didn't get any; any chance now?


David George 116/12/2017 19:31:00
377 forum posts
129 photos

Have you tried to tap the holes in the cover plate only with a bigger thread and jack off the cover with screws or slide hammers, their is more ways to skin a cat. Let us know how you get on please. I assumed you had succeeded when it went quiet.


Edited By David George 1 on 16/12/2017 19:31:56

not done it yet16/12/2017 19:40:58
1801 forum posts
11 photos

Perhaps the exasperated reply was directed at the pi55 takers, mainly? There is a difference between being unable to help (within the current available information) and the replies from certain parties to a new forum member?

Just thought for food.....

Edited By not done it yet on 16/12/2017 19:41:49

Michael Gilligan16/12/2017 23:04:56
11054 forum posts
475 photos
Posted by isimbard brunel on 04/12/2017 20:29:00:

[ ...]

I have tried to add a scan of the relevant bit of the parts list. < etc. >


The process for posting images on this forum is a little idiosyncratic.

May I suggest that you read this thread: **LINK**

How To Post Pictures and Create Albums

I'm pretty sure you will get better responses when people can see the diagram to which you refer.


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