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

Search:

Type: Posts; User: wesg

Page 1 of 60 1 2 3 4

Search: Search took 0.04 seconds.

  1. Thread: Lapping Machines

    by wesg
    Replies
    16
    Views
    1,241

    What are you finish machining them on? I'm...

    What are you finish machining them on?

    I'm thinking facing on a VTL. Vacuum hold down on 3 pods for height control. Multiple other pods in between that float vertically, and can be locked with a...
  2. Replies
    26
    Views
    1,656

    The first 2 or 3 threads take the vast majority...

    The first 2 or 3 threads take the vast majority of the load in any case. Like 70% or more. And if it's a mil spec breech extension, the threads have probably been cut before hardening, and could be...
  3. Replies
    8
    Views
    687

    I've heard stories of the t-slot in the compound...

    I've heard stories of the t-slot in the compound being pulled up resulting in the toolpost only making contact near the bolt. So there's less total contact area, and it's a smaller diameter, so the...
  4. I've ground the springs in all of mine, and never...

    I've ground the springs in all of mine, and never a malfunction related to ejection in over 20k rds.

    Cut it back to where the ejector is flush with the face of the bolt. Or better, start a bit...
  5. Replies
    4
    Views
    387

    4 wouldn't hold a 2x Leupold on my 10" .357...

    4 wouldn't hold a 2x Leupold on my 10" .357 Contender. But I was young and didn't know what loctite was for.
  6. Replies
    19
    Views
    887

    You might want to make sure you can get the...

    You might want to make sure you can get the adapter out if it decides it likes the drawbar better than the toolholder. One piece, or loctite the stud in the coupler, and mill a hex on the end so you...
  7. Disengage, let it coast to a stop. Reverse, and...

    Disengage, let it coast to a stop. Reverse, and re-engage when the dial lines up where you started.

    Retract the tool in between those 2, of course.
  8. Replies
    19
    Views
    1,919

    And taper. Last one I did was ... wow. Never seen...

    And taper. Last one I did was ... wow. Never seen that before.
  9. Replies
    19
    Views
    1,919

    And then you cut a loading/ejection port in it,...

    And then you cut a loading/ejection port in it, with some risk of warping. And a repeater is even worse.

    Barnard, at least, grinds the bolt bores on their's after heat treat. But that's maybe...
  10. Replies
    28
    Views
    1,585

    Blued steel rifle barrels are generally 4140....

    Blued steel rifle barrels are generally 4140. Already have a hole that would be much easier to ream smooth and to the size you want than drilling from solid.

    Not exactly cheap, unless you find a...
  11. Replies
    28
    Views
    1,585

    I thought maybe he's tapping maples for sap....

    I thought maybe he's tapping maples for sap. Checked his profile if he's in Vermont... 'dendrochronology'. He's taking core samples, so it has to be hollow.
  12. Replies
    7
    Views
    468

    2.560 Dia, a bit smaller than the standard...

    2.560 Dia, a bit smaller than the standard crossfeed dial. No lock, just friction.

    299262
  13. Replies
    7
    Views
    468

    .2 on the 12S as well.

    .2 on the 12S as well.
  14. Hence, the 'General' forum on PM ;-)

    Hence, the 'General' forum on PM ;-)
  15. I think a tap starts with a little heavier cut on...

    I think a tap starts with a little heavier cut on one side because of the helix and taper on the nose. And that might push it off center right from the start.

    If it has to be on location, you...
  16. Replies
    18
    Views
    1,765

    Mill. And an endmill, not a drill.

    Mill. And an endmill, not a drill.
  17. Do they have any eye relief? Most all I've looked...

    Do they have any eye relief? Most all I've looked at don't have enough to keep your glasses on. The only one I've seen, and should have bought on the spot, is an Olympus.
  18. Replies
    14
    Views
    1,091

    IMO, the best type of non insect internal tools....

    IMO, the best type of non insect internal tools.

    FWIW, they get sharpened by grinding the top face and rotating them back up to center.

    DON'T butcher them by grinding the circumference, like...
  19. Replies
    43
    Views
    2,979

    Looks like an EDM to me.

    Looks like an EDM to me.
  20. Yeah. I know. This came up a couple years back,...

    Yeah. I know. This came up a couple years back, that thread charts are based on an obsolete, Sellers, thread with a full sharp profile. The formula for a UN thread takes the root into account and...
  21. Some fiddling in CAD shows a bar diameter scallop...

    Some fiddling in CAD shows a bar diameter scallop just works for whatever hole size. It intersects the 'edges', and is tangent at the center. I don't know what principle of geometry is responsible...
  22. A scallop cut on both sides, using a cutter...

    A scallop cut on both sides, using a cutter that's bar diameter, will meet the intersection of the thru hole pretty nicely. A little fiddling with dia and depth should give you something useful. Of...
  23. Replies
    10
    Views
    994

    Probably simpler to buy I and E Inserts than to...

    Probably simpler to buy I and E Inserts than to find a LH bar. Especially considering you probably only need 1 of each.

    Make sure you get sharp inserts.

    3/4" shank carmex bar will fit a bxa...
  24. Replies
    23
    Views
    2,437

    I've got a serial/parallel card in my PC. Works...

    I've got a serial/parallel card in my PC. Works just fine, but you need a cable thats wired correctly. A 'null modem' adapter might work, but only at a low baud rate, IME.

    Biggest drawback is you...
  25. Replies
    13
    Views
    929

    I'd sure be looking for how coolant is getting in...

    I'd sure be looking for how coolant is getting in there. Water based, heavier than oil, its gonna float the HF out the breather.

    Clueless about your machine, but the comment about a heat exchanger...
Results 1 to 25 of 1500
Page 1 of 60 1 2 3 4