- Joined
- Dec 26, 2012
- Messages
- 63
Hi all,
greetings to my "classmates" from the Georgia scraping class and our mentor R.King.
I have been trying to hone my scraping skills, as best I have had the time to (my friends camelback.. happens to be just the thing we practised, ie. one surface flat and to 40 ppi). I learned a lot in Georgia, something I would never have done without Richards teaching. I hope I will do him right with my efforts on my projects.. Another side of the class experience was that I had a he.. of a good time! Better vacation I could not have had.
One major project I have aquired is a Schaublin SV52 mill, details found at http://www.lathes.co.uk/schaublinmiller/page5.html (thanks to my friend Ola, who convinced me that I just had to have this mill, as can be seen by his grinning face after I had been talking with the salesguy at the local Danish machine dealer..)View attachment 54691
I did try the machine somewhat before committing, but as Ola proclaimed "it cannot be much used as there is hardly no paint chipped off.." hmm..the machine is a good 50 years old..
View attachment 54692pic of the mill in my garage, having been delivered by the typical Danish freight company driver working in slippers, truck with summer tires (down to my place went well, but in Oslo in the hillside in wintery conditions to where he went..?)
Well, to put it short, I have found both wear and breakage (as would be expected).
Listing as goes:
- The casting holding the brass nut for the in/out table feed was almost broken off, and parted entirely when I put it to the test. One part is still stuck to the underside of the bigger part that onto which the table rests/slides. I have not yet been able to solve the puzzle of how to get apart, but I hope I am in for a "AHA!" experience. Anyway, the 2 cast iron parts are candidates for either brazing or welding together.. We'll see. That is a fix that may be held off until later. Update! I am told it is also possible to "nest the parts together" using Metalock. Ie. no heating, welding or traditional stuff.. sounds too good to be true.. will investigate further as there is a local Metalock company in my city.
- a couple of broken nuts/screw remaindings in holes etc. Not the biggest problems
- Some more or less rusty parts. Also not much concern
- a lot of grime and dirt, as well as a good portion of greas/oil/swarf mixture.. again, no problem, just work..
- Then onto the topic that is more interesting, namely how much work is needed to restore it to its' former accuracy..
The old lady is Swiss, and on the heavy side at 1200Kg (2600lbs), so she's hard to wrestle around. I have plans to get her on her back having undressed her down to the bare neccessities.. that is, scraping the column ways etc. She may have a coat of fresh paint, but I am no artist, so if it can be avoided..
The table sideways measurements shows about +/-5/100 (2/1000") deviation from center. To my knowledge, the table itself is bowed, and "hangs" down on each side by this amount. This is confirmed by setting a level on the table which proves it is high in the middle. Pic show one of the table flatness tests (I did front, middle and back as well as crosswise all corners, all the same results). Right, Richard?
View attachment 54693
The underside of table, ie. table ways, are pretty flat, though the scrapemarks are almost gone. I also measured the box ways after I had removed the table, leaving the knee ways exposed. In/out travel seems OK, ie. almost no difference. The horisontal ways seems to have seen less wear, and these seem flat and parallel. The main errors are in the vertical box ways. The knee slopes towards the left and out. Going down there is about 20/100 mm (8/1000") movement to the left from top to bottom (45 cm) and about 25/100 mm (10/1000") out.View attachment 54697
The column has box ways, with the gib on the right (inside) of the left way as seen from the front. With this gib drawn in tight, there is still room for a 10/1000" feeler gage on the opposite side of the left way (same ways as the gib). This is probably because the left side of the righthand way also bears, so no matter if the gib is tight, there is still play. The top side of both keep-plates behind the ways also have play, indicating signs of wear of the mating members here, ie. the back of the ways?
The left side box way is higher than the right side, so it won't "sit" directly on the granite table. Therefore it seems easier for me to scrape the horisontal box ways while the knee is fixed to the column.
View attachment 54698
Is this OK practise? Out of lazyness, since the knee is already sitting there, I thought maybe I could scrape the horisontal ways first. OK? I guess this would void the term "building the house from the foundation and up"? Ie. normally you start at the bottom and work up: First remove the knee and scrape the column, then the mating member, then mount back the knee.
Also, from your experience, which of the box way surfaces are clearance, if any? Left vertical way bears both sides, but is the right way meant to have clearance on one side?
Many questions, and I know you're progressed to another scraping class, but I thought you might like to hear from me... Kind rgds, Jan Sverre
greetings to my "classmates" from the Georgia scraping class and our mentor R.King.
I have been trying to hone my scraping skills, as best I have had the time to (my friends camelback.. happens to be just the thing we practised, ie. one surface flat and to 40 ppi). I learned a lot in Georgia, something I would never have done without Richards teaching. I hope I will do him right with my efforts on my projects.. Another side of the class experience was that I had a he.. of a good time! Better vacation I could not have had.
One major project I have aquired is a Schaublin SV52 mill, details found at http://www.lathes.co.uk/schaublinmiller/page5.html (thanks to my friend Ola, who convinced me that I just had to have this mill, as can be seen by his grinning face after I had been talking with the salesguy at the local Danish machine dealer..)View attachment 54691
I did try the machine somewhat before committing, but as Ola proclaimed "it cannot be much used as there is hardly no paint chipped off.." hmm..the machine is a good 50 years old..
View attachment 54692pic of the mill in my garage, having been delivered by the typical Danish freight company driver working in slippers, truck with summer tires (down to my place went well, but in Oslo in the hillside in wintery conditions to where he went..?)
Well, to put it short, I have found both wear and breakage (as would be expected).
Listing as goes:
- The casting holding the brass nut for the in/out table feed was almost broken off, and parted entirely when I put it to the test. One part is still stuck to the underside of the bigger part that onto which the table rests/slides. I have not yet been able to solve the puzzle of how to get apart, but I hope I am in for a "AHA!" experience. Anyway, the 2 cast iron parts are candidates for either brazing or welding together.. We'll see. That is a fix that may be held off until later. Update! I am told it is also possible to "nest the parts together" using Metalock. Ie. no heating, welding or traditional stuff.. sounds too good to be true.. will investigate further as there is a local Metalock company in my city.
- a couple of broken nuts/screw remaindings in holes etc. Not the biggest problems
- Some more or less rusty parts. Also not much concern
- a lot of grime and dirt, as well as a good portion of greas/oil/swarf mixture.. again, no problem, just work..
- Then onto the topic that is more interesting, namely how much work is needed to restore it to its' former accuracy..
The old lady is Swiss, and on the heavy side at 1200Kg (2600lbs), so she's hard to wrestle around. I have plans to get her on her back having undressed her down to the bare neccessities.. that is, scraping the column ways etc. She may have a coat of fresh paint, but I am no artist, so if it can be avoided..
The table sideways measurements shows about +/-5/100 (2/1000") deviation from center. To my knowledge, the table itself is bowed, and "hangs" down on each side by this amount. This is confirmed by setting a level on the table which proves it is high in the middle. Pic show one of the table flatness tests (I did front, middle and back as well as crosswise all corners, all the same results). Right, Richard?
View attachment 54693
The underside of table, ie. table ways, are pretty flat, though the scrapemarks are almost gone. I also measured the box ways after I had removed the table, leaving the knee ways exposed. In/out travel seems OK, ie. almost no difference. The horisontal ways seems to have seen less wear, and these seem flat and parallel. The main errors are in the vertical box ways. The knee slopes towards the left and out. Going down there is about 20/100 mm (8/1000") movement to the left from top to bottom (45 cm) and about 25/100 mm (10/1000") out.View attachment 54697
The column has box ways, with the gib on the right (inside) of the left way as seen from the front. With this gib drawn in tight, there is still room for a 10/1000" feeler gage on the opposite side of the left way (same ways as the gib). This is probably because the left side of the righthand way also bears, so no matter if the gib is tight, there is still play. The top side of both keep-plates behind the ways also have play, indicating signs of wear of the mating members here, ie. the back of the ways?
The left side box way is higher than the right side, so it won't "sit" directly on the granite table. Therefore it seems easier for me to scrape the horisontal box ways while the knee is fixed to the column.
View attachment 54698
Is this OK practise? Out of lazyness, since the knee is already sitting there, I thought maybe I could scrape the horisontal ways first. OK? I guess this would void the term "building the house from the foundation and up"? Ie. normally you start at the bottom and work up: First remove the knee and scrape the column, then the mating member, then mount back the knee.
Also, from your experience, which of the box way surfaces are clearance, if any? Left vertical way bears both sides, but is the right way meant to have clearance on one side?
Many questions, and I know you're progressed to another scraping class, but I thought you might like to hear from me... Kind rgds, Jan Sverre
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