Scraping of The Saddle On My 15" Sheldon

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4GSR

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I have setup and started scraping on my saddle. As you will see in the posted pictures, I have taken a Horrible Freight welding table and turned it into a universal scraping table. Worked out perfect, well almost, good enough for me. Scraping from one direction, it's stable, but from the other direction, it shakes. I just put my foot down the base and stabilize it while I scrape. Starting off, I "fuzz" down the ways or shears (depending on which side of the World you are on) to get a fairly clean surface to work from. This saddle has less than 0.003" wear on the shears that rub against the way. Amazing shape for a 57 year old lathe.
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Next, I took and scraped heavy the middle length of the areas on each shear. This provides a relief in the middle of the bearing surfaces on the saddle. This is something that some people do and others do not. It may also keep the slide from "rocking" giving you a false impression too. Then I took a impression to see what kind of pattern I get.
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Almost all four corners touching! Touching on the end which is away from the headstock end of the saddle. So, starting off, I will heavy scrape the bottom right hand way surface, which is the flat way and take another impression and see if I get better four point contact on the ways. Right now, I will not touch the vee ways. I'll report on my progress later this weekend. Ken

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I haven't had a chance to post my progress on the saddle. After six impressions and some heavy scraping, I've got it touching at all four corners on both ways. Next weekend after I get back from my trip to Houston, I'll pull out big blue and start power scraping and get my bearing points established to where I get about 20-25 ppi as Richard puts it on the bearing surfaces. Ken
 
Have the saddle scraped in as close as it's going to get, It's not Richard King perfect, good enough for the girls I run around with!
My next step is providing lubrication points to the saddle. Everything is in place, just have to drill and tap a few holes for the lube fittings. Been having to work on stuff that makes my living this month along with fighting with my RA and sickness. It's not easy!
Here's some pictures of the last impression taken of the saddle. Ken

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Sorry to hear you've been sick, makes it hard to pay the bills.
I don't know much about scraping yet, but it looks good to me! This is probably a dumb question but is there surface plate for the v ways?
 
Ken,

I need a quote to scrape the ways, the saddle, and the tail stock on my Taiwanese made 1236, so I don't have to think about replacing it......

Austin is not that far from Victoria, I can drive up in no time.

OK, I know the answer - wishful thinking, nice try...


Worth the try, though..


nez
 
............. This is probably a dumb question but is there surface plate for the v ways?
I use the vee way and flat on the lathe bed. The lathe bed is nearly new. May have a quarter thousandth wear if even that. Got very lucky on this lathe.
 
Ken,

I need a quote to scrape the ways, the saddle, and the tail stock on my Taiwanese made 1236, so I don't have to think about replacing it......

Austin is not that far from Victoria, I can drive up in no time.

OK, I know the answer - wishful thinking, nice try...


Worth the try, though..


nez

Yeah, 143 miles my driveway to ADC Clinic North.
We can work out something if your dead serious needing some work done. You may have to do it all, at least do some of it, at the same time learn the scraping technique. First question I have to ask, how straight or how much wear do you think your bed has on it?
 
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