Nigel Tudor
Plastic
- Joined
- Aug 6, 2018
Last fall I was fortunate enough to buy a Deckel FP2 (serial number 8800). As has been recommended several times on this forum, I disassembled the table/saddle to make sure that no one ever pumped grease into the oil lubrication ports. Luckily it appears that my machine was never given grease in the oil ports.
The way surfaces on my machine appear to generally be in good condition. The major exception is the gibs that bolt to the back of the table. Measuring on the “unworn” part at the ends to the center, there is about .0008” (.002mm) of wear on the table back gibs. The mating surface to these gibs on the knee still has some scraping marks in the center and is worn .0001” (.0025mm) lower on the operator side and .0002” (.005mm) lower on the side away from the operator. I think the previous operator just gave it a couple of squirts of oil and didn’t fill up the sight glass. Luckily there is no galling.
I have a surface grinder (6 x 18) and plan on grinding and rescraping the back gibs. Here are my questions:
1.)I have read that the gibs are made of steel and not cast iron. Can you use a 5 degree negative (like cast iron)to scrape these gibs or should you use a positive cutting edge? Do you have an angle recommendation?
2.)At a minimum I am going to restore the back gibs.
3.)Is the wear on the saddle side low enough that I can leave it be or should I scrape it parallel to the front side (which appears to have minimum wear).
4.)What clearance would you recommend for this gib?
5.)The scraping is not particularly deep .0002"-.0003"(.005 -.007mm). It appears to be the half crescent or "Moore Style" scraping pattern. I don't know how to "Moore Pattern" scrape. I would checker board scrape the surfaces as I learned from Richard King. If I rescape these surfaces is just the scraping sufficient or should I also frost one side (probably the saddle side)?
Here are the gibs sitting on my surface plate:
Here is the back of the saddle:
It was hard to get a picture of the back of the gibs that go on the back of the z-axis column ways. There is only .0001" wear on the upper side of these gibs. On my machine the way surface sit .0029" (.073mm) higher than the ground surface that mates with the saddle.
The way surfaces on my machine appear to generally be in good condition. The major exception is the gibs that bolt to the back of the table. Measuring on the “unworn” part at the ends to the center, there is about .0008” (.002mm) of wear on the table back gibs. The mating surface to these gibs on the knee still has some scraping marks in the center and is worn .0001” (.0025mm) lower on the operator side and .0002” (.005mm) lower on the side away from the operator. I think the previous operator just gave it a couple of squirts of oil and didn’t fill up the sight glass. Luckily there is no galling.
I have a surface grinder (6 x 18) and plan on grinding and rescraping the back gibs. Here are my questions:
1.)I have read that the gibs are made of steel and not cast iron. Can you use a 5 degree negative (like cast iron)to scrape these gibs or should you use a positive cutting edge? Do you have an angle recommendation?
2.)At a minimum I am going to restore the back gibs.
3.)Is the wear on the saddle side low enough that I can leave it be or should I scrape it parallel to the front side (which appears to have minimum wear).
4.)What clearance would you recommend for this gib?
5.)The scraping is not particularly deep .0002"-.0003"(.005 -.007mm). It appears to be the half crescent or "Moore Style" scraping pattern. I don't know how to "Moore Pattern" scrape. I would checker board scrape the surfaces as I learned from Richard King. If I rescape these surfaces is just the scraping sufficient or should I also frost one side (probably the saddle side)?
Here are the gibs sitting on my surface plate:
Here is the back of the saddle:
It was hard to get a picture of the back of the gibs that go on the back of the z-axis column ways. There is only .0001" wear on the upper side of these gibs. On my machine the way surface sit .0029" (.073mm) higher than the ground surface that mates with the saddle.