Search Results - Practical Machinist - Largest Manufacturing Technology Forum on the Web
Close
Login to Your Account

Search:

Type: Posts; User: Paolo_MD

Page 1 of 60 1 2 3 4

Search: Search took 0.03 seconds.

  1. Replies
    13
    Views
    655

    To me it looks like the base has been chopped off...

    To me it looks like the base has been chopped off and it is too short to keep the gauge stable.
    Vinegar and citric acid, if not checked carefully, will keep corroding into the metal. Evaporust and...
  2. Many prefer using brass pins/screws for this type...

    Many prefer using brass pins/screws for this type of repairs: strong enough and more likely to work themselves to the correct profile than causing odd wear on the mating teeth (true only if kept free...
  3. If I recall correctly, Busch Precision offered...

    If I recall correctly, Busch Precision offered indeed at least a 6 ft parallel-type aluminum straightedge with cast iron strips bonded on both sides. Apparently, they were quite accurate and stable....
  4. Replies
    24
    Views
    1,690

    One issue I can see with melting brass is that...

    One issue I can see with melting brass is that the zinc is boiling out if the mix, making literally deadly microscopic crystals of zinc oxide (metal fume fever).

    But, by wearing the proper...
  5. Replies
    74
    Views
    4,441

    I second "restraining" the cherry picker from the...

    I second "restraining" the cherry picker from the back (I had to do it once to remove a pallet from under a #2 Cincinnati tool and cutter grinder).
    In this case, probably the best solution is to...
  6. Replies
    23
    Views
    1,609

    I think that what Liny Sami meant is that it...

    I think that what Liny Sami meant is that it doesn't appear to be a standard British thread.

    Two comments. First, although Froneck is far from being a beginner, I would be careful on the outside...
  7. Replies
    4
    Views
    621

    Perhaps used in pattern making and similar...

    Perhaps used in pattern making and similar activities.

    Paolo
  8. Both the VN #2 we have at Tuckahoe and one owned...

    Both the VN #2 we have at Tuckahoe and one owned by one of our volunteers (both post 1912, as for address cast on the door) have a B&S 13 spindle, with adapters for VN C collets (Hardinge 5V). The...
  9. Replies
    14
    Views
    1,091

    I think it started its life as a lathe, but got...

    I think it started its life as a lathe, but got heavily modified. I doubt that back gears do anything useful if crank is coupled to the spindle (back gears would work only if power were applied to...
  10. Replies
    74
    Views
    4,441

    Interpreting an indirect measurement like the one...

    Interpreting an indirect measurement like the one you did is a bit tricky. The simplest explanation is that you have more wear at the ends of the ways (either turcite or harden ways, or both) than in...
  11. I would suggest that, before doing anything with...

    I would suggest that, before doing anything with the bottom of the table, you address the top, especially if you think about milling, grinding, or planing it, since that operation would remove more...
  12. Denis, I think that Emanuel Goldstein has a very...

    Denis,
    I think that Emanuel Goldstein has a very good point. Definitely, I would avoid using a taper pin for the nodding of the head: just by moving the ram back and forth, you would end up with the...
  13. Replies
    15
    Views
    1,241

    I think Illinoyance has a good point. The most...

    I think Illinoyance has a good point. The most common cause of oversize holes is the two flutes not being equivalent: either the point shifted one side or the actual angles being slightly off and one...
  14. If it has a tapered gib, it could be that the...

    If it has a tapered gib, it could be that the screws holding it are too loose and it wedged itself tightly.

    Paolo
  15. Replies
    27
    Views
    1,316

    Your diagnosis sounds reasonable and makes me...

    Your diagnosis sounds reasonable and makes me suspecting that the chamber has tight tolerances and might interfere with slightly more lube on the bullet.
    Regarding mounting, I was thinking about CA...
  16. Replies
    27
    Views
    1,316

    I'm not familiar with that pistol and do not know...

    I'm not familiar with that pistol and do not know what are the moving parts during the firing cycle.

    Anyhow, a low-tech way I would approach the problem is to glue a light-but rigid-pointer to the...
  17. Replies
    317
    Views
    19,663

    What I'm wondering is what is on the side of the...

    What I'm wondering is what is on the side of the through opposite of the set screw (that appears removed on some of your pictures). I have hard time interpreting the pictures (and I don't think we...
  18. Replies
    317
    Views
    19,663

    Doc, What was the purpose of the screw(?)...

    Doc,
    What was the purpose of the screw(?) circled in red? Especially if it didn't have any obvious purpose, couldn't it be the access point to unscrew the screw that holds the trough to the opposite...
  19. Replies
    74
    Views
    4,441

    Your video looks good. I don't know if this is...

    Your video looks good. I don't know if this is the case, but sometimes you grind more material off spinning the cutoff wheel slower. I agree that .0001" per pass (and, in normal scraping discussion,...
  20. Replies
    74
    Views
    4,441

    Your scraping looks good. It is important to...

    Your scraping looks good. It is important to survey the depth you are getting: the difference between the "peaks" and the "valleys" should be at least .0002-.0003 in.

    Regarding spotting and...
  21. Dave, I strongly concur in ignoring Bill...

    Dave,
    I strongly concur in ignoring Bill (Thermite). Lately he behaves even worse than usual and his favorite sport is derailing threads and get people mad.

    Regarding the lathe, I cannot say...
  22. Replies
    38
    Views
    2,479

    Another reason not to get this one is the spindle...

    Another reason not to get this one is the spindle bore being just 1" in diameter. Too small for 5C collets and very limiting for working on longish shafts, especially considering the fairly short...
  23. For water pipes, in Italy was used hemp fiber....

    For water pipes, in Italy was used hemp fiber. The most common pipe dope was green, not white. A plumber's trick was to mar the male threads with channel lock pliers before putting the dope and the...
  24. Replies
    9
    Views
    600

    Talking about modifying an antique, probably I'd...

    Talking about modifying an antique, probably I'd start with replacing the 6 TPI nut and screw with a 8 or 10 TPI one. Then, unless you have any physical interference, you can make a larger dial.
    In...
  25. Replies
    13
    Views
    1,253

    I would also make sure that the chuck is in good...

    I would also make sure that the chuck is in good shape and properly mounted. if the piece is larger toward the tailstock, it could also mean that the jaws of the chuck are bell-mouthed and the piece...
Results 1 to 25 of 1500
Page 1 of 60 1 2 3 4