Beaver Mill Mk1

[Brad93]

So I think since we are going down the rabbit hole of bearings, we better do them all.

So I'm gonna see what the firm in Norwich can do new old stock wise vs new RHP from my usual supplier, which is about 20% less than online.

 

[Brad93]

Someone really done a number on this mill.

I said to @Pete. earlier i think their only tools were a chisel and a hammer.

This shaft has a captive washer. Someone, in their attempt to get the shaft out, has used a screwdriver under the captive washer trying to pry it. Made a right poxy mess.

Luckily I own a slide hammer and just need to turn a simple adapter to thread onto the stud at the end of the shaft.

 

[pressbrake1]

The table...

View attachment 333278

Planer job

 

[Brad93]

Planer job

I think it's too deep mate. Might be worth giving it a tickle so it's a bit flatter though

 

[mm289]

Hi Brad, probably will not be a lot of new stuff to a man of your experience but here is a link to the strip down of mine. https://www.model-engineer.co.uk/forums/postings.asp?th=91397

Some particularly obstinate parts of the table leadscrew had me foxed for a while

Cheers,

Paul

 

[Brad93]

Hi Brad, probably will not be a lot of new stuff to a man of your experience but here is a link to the strip down of mine. https://www.model-engineer.co.uk/forums/postings.asp?th=91397

Some particularly obstinate parts of the table leadscrew had me foxed for a while

Cheers,

Paul

Thanks Paul I'd not seen that, I'll have a read through.

A lot of bits on mine look to have been handmade/fettled. Was yours the same?

 

[Brad93]

Hi Brad, probably will not be a lot of new stuff to a man of your experience but here is a link to the strip down of mine. https://www.model-engineer.co.uk/forums/postings.asp?th=91397

Some particularly obstinate parts of the table leadscrew had me foxed for a while

Cheers,

Paul

I think your one is a bit later than mine, is it a mk2?

 

[MetalMonkey]

I'm following this with interest as I might have to tackle this on my Mk1 - I'd be interested if you end up with a list of the bearing codes/and or find a supplier brad?
Pauls looks like a Mk2, different head and an offset box way on top of the knee. Not sure how much of the internals on the head are the same.

 

[mm289]

Yes I think Mk2 still in bits unfortunately but was the main reason for doing the scraping course.

Wouldn't say there was much that looked handmade, the most impressive thing was the mahoosive oiler thingy, it was like a huge octopus

 

[Brad93]

Main Pulley Bearings: 2x LJT1-⅜" RHP
Backgear Bearings: 2x 6205
Backgear Pulley: 2x LJT1-⅝" RHP
Quill: TBA

 

[Brad93]

Everything else on it is in bronze bushings

 

[Brad93]

Quite an involved job getting into these bits.

Pullers required, soft wedges, a hydraulic press, few sizes of circlip pliers.

I'd advise just doing one section as you go, say do the quill, or the top bearings, see how you get on.

There are some little grease holes with a bronze conical seat but mine were covered in paint.

 

[MetalMonkey]

Other than the table and the few abused bits that looks like it has the potential to be a really nice machine - never seen one with the frosting still intact.
It can't have had a lot of use.

 

[Brad93]

Other than the table and the few abused bits that looks like it has the potential to be a really nice machine - never seen one with the frosting still intact.
It can't have had a lot of use.

It's had a lot of use, in one section of the table.

 

[Brad93]

It will be a good mill. Once it's sorted

 

[Matchless]

Lol at the grease build up, BTDT. Nasty crack starting on the head housing.

and you don't want a nasty crack in your beaver do you!

 

[Brad93]

Slide hammer got the shaft and bearing assembly out with a few relatively sharp whacks. Shaft has a circlip on the back so no other was of getting it out. It all had to come out together.

If the shaft didn't have the circlip you could of pulled that out with the slide hammer and a collet then use a blind puller or a deep v puller to remove the bearing.

Strange old design but hey ho. I will fix the witness marks with the Archdale mill and a boring head with a 45 degree chamfer tool.

Also need to put the whole housing on the surface plate tomorrow and remove any high spots caused by previous owners prying the covers off.

 

[minimutly]

File...

 

[mtt.tr]

If it's just pry marks just run a flat file across it. Less chance of changing the geometry.


Out of interest why have you stripped it down? Was there noticable wear, was the noise the quill spline sloppy?

 

[Brad93]

If it's just pry marks just run a flat file across it. Less chance of changing the geometry.


Out of interest why have you stripped it down? Was there noticable wear, was the noise the quill spline sloppy?

No chance of getting a file in there. It's a pocket down in a bore.