You should just be able to pull the bed out from the knee. Once removed you can withdraw the bull screw along with the handle and the tee nut.

Good evening, Dt,

This forum has a particular method for posting photos. You have to create an album and then upload the photos into it, then call them down into your forum post.

There should be a link pinned to the top of the home page somewhere. It's quite simple once you get used to it, say by about the third photo. You can have as many albums ('alba'? ) as you like for different subjects.

Best regards,

Swarf, Mostly!

P.S.:  ALWAYS type a space before typing a right bracket – this avoids waking-up the smiley gremlis!

Edited By Swarf, Mostly! on 19/01/2023 19:03:52

Edited By Swarf, Mostly! on 19/01/2023 19:05:57

Edited By Swarf, Mostly! on 19/01/2023 19:06:51

I have a Tom senior and I've taken it apart several times but I'm afraid I don't understand the problem from the description and the photo is too zoomed in for me to see what we are looking at. If you could be a bit clearer with the problem and show more in the photo I should be able to help.

The manual for several variaitions is on the Denford website, and here is the link to the pdf. The nut for the Y axis is shown on p13. These mills are very easy to strip down.**LINK**

I have pictures in my album of modifications done to the Y axis nut for antibacklash. The igp 2994 shows the hole that the nut sits in, and the nut and the nut and its modifications ars from igp2998, to igp 3013.

Edited By old mart on 20/01/2023 20:35:30

Did you notice the R8 head, much more complicated than my R8 mod to the light vertical head, I only have two taper roller bearings.

 As for the scale, the original drawings have been scanned, so they could be any size.

Edited By old mart on 20/01/2023 20:48:17

I think you remove any gibs from the Y axis and lift it up. the nut will remain with the Y leadscrew in the knee. The picture, 19-49-08, with the red ring shows the nut in the hole after the screw and washer have been removed, clean the muck off and you should see the bronze.

I am nearing the end of a rather drawn out refurbishment of my Tom Senior M1 milling machine. I started taking it to bits 3 years ago!

Everything has gone more or less to plan, but I have a few minor issues to sort out.

The first one is that I have mislaid the 2 nuts which secure the knucklehead assembly to the 2 mounting studs. If someone can let me know the thread that woud be most helpful. My first guess was 3/8" UNF or UNC, but those are marginally too small.

Andrew

Thanks Roy

3/8" BSF and 3/8" Whitworth nuts are now on order. I'll post the answer when they arrive.

My second question concerns the gearbox. Before refurbishment, I could only select 2 of the 3 gears, and even those were difficult to engage. I stripped the gearbox down and cleaned it all up. Everything looked to be in excellent condition, with no play in the shafts. However, the gears are a very close fit. With the front cover off, I could engage all 3 gear positions, but it took a bit of 'jiggling' to select each gear. Now that the front cover is back on and I can't see inside, it is even more difficult to select each gear.

Has anyone else experienced this problem and, if so, any suggestions as to how to fix it? I saw a picture of another Tom Senior M1 mill where a longer gear selector lever had been fitted which suggests that it may a be an issue which others have encountered.

Andrew

Edited By JasonB on 09/04/2023 10:12:11

And the answer is: the 2 nuts which secure the knucklehead assembly to the 2 mounting studs are 3/8" BSF.

Thanks Roy!

Andrew