2L Brown & Sharpe Surface Grinder

[dhansen]

I was unable to find an elevating screw and nut for less than $4,000 so I made my own. I bought a 3/4-8 left hand acme tap for $50 and the materials for $100. Here is a picture of my latest project.

[mattthemuppet]

ooh, very nice. Did you cut the screw acme threads yourself or use acme all thread?

[reggie_obe]

Did you check with Roton?

https://www.roton.com/products/acme-lead-screws-nuts/engineering-data/

[mc_n_g]

Congratulations on making the nut. If you cut the acme rod also, congrats on that too.
I have a Number 2 myself but have not had to make anything for it....yet!

[dhansen]

ooh, very nice. Did you cut the screw acme threads yourself or use acme all thread?

I tapped the nut first, had to grind the square on the tap so that my tap extension would allow my to go all the way through the 4 1/2 in long nut. I cut the acme thread on the screw fitting it to the nut to provide a tight fit. It took time, patience and perseverence but it came out the way I wanted.

[dhansen]

Did you check with Roton?
https://www.roton.com/products/acme-...ineering-data/

The nut is 4 1/2 inches long so I didn't check with them. I wanted to thread the screw myself to get a nice tight fit on the nut

[dhansen]

Congratulations on making the nut. If you cut the acme rod also, congrats on that too.
I have a Number 2 myself but have not had to make anything for it....yet!

I had to grind the tap square to fit my tap extension so that I could tap all the way through the 4 1/4 long nut. I did cut the acme screw so that I could get a nice tight fit on the nut. There are not many parts for this old machine unless you have them custom made at substantial expense.

[mattthemuppet]

that is very impressive, good work!

[dhansen]

that is very impressive, good work!

Thank you

[Bob Engelhardt]

Very nice - Probably better than the $4000 ready made. But where is the $100 in material? (Not that it wasn't worth it.)

[Peter.]

Nice work well done. I had to do similar to my Eagle grinder. I turned a new screw with the same pitch but making the OD larger by the thread double-depth, then I turned the old thread out of the nut and cut a new one to fit the larger screw. That saved me having to buy bronze and machine it for a new nut.

[dhansen]

Very nice - Probably better than the $4000 ready made. But where is the $100 in material? (Not that it wasn't worth it.)

I purchased a 1 1/2 diameter 2' long steel shaft for $50 from Speedy Metals and a 1 1/2 diameter 8" long brass shaft for $50 on Ebay

[dhansen]

Nice work well done. I had to do similar to my Eagle grinder. I turned a new screw with the same pitch but making the OD larger by the thread double-depth, then I turned the old thread out of the nut and cut a new one to fit the larger screw. That saved me having to buy bronze and machine it for a new nut.

Great solution

[nc5a]

Nicely done dhansen. It's always very satisfying to make machine parts and have them come out as good or better than factory. What lathe do you have? Do you have any photos of building the parts that you would be willing to post? If so I'm sure some of us would be interested in seeing your setup. Nice photo and not a lot of fluff in the background, well done.

[dhansen]

Nicely done dhansen. It's always very satisfying to make machine parts and have them come out as good or better than factory. What lathe do you have? Do you have any photos of building the parts that you would be willing to post? If so I'm sure some of us would be interested in seeing your setup. Nice photo and not a lot of fluff in the background, well done.

I've got an older Clausing Cochester 12x36. Sorry I don't have any pictures of the setup. Thanks for the compliment. I will try to describe the setup if you'd like.