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Type: Posts; User: Holescreek

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  1. Replies
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    854

    Check the jaw parallelism. Quick and dirty method...

    Check the jaw parallelism. Quick and dirty method is to close the jaws and hold it up to the light looking for a gap. The two setscrews on the top are for adjusting parallelism and drag. The front...
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    8,007

    After I bought my current house 22 years ago I...

    After I bought my current house 22 years ago I realized that it was situated centrally between 3 fire stations. The first few weeks kind of sucked but gradually I quit hearing sirens. It's amazing...
  3. I used to order replacement parts by part number...

    I used to order replacement parts by part number from the supplier who sold us the instruments to begin with. Parts are cheap most of the time, figuring out where to buy them is the hard part. ...
  4. The seal groove in the piston bore has a "Safety...

    The seal groove in the piston bore has a "Safety Critical" designation. If you were to cut through the groove and look at it from the side you'd see the two parallel sides I mentioned, and the...
  5. The seal groove is tapered shallow at the front...

    The seal groove is tapered shallow at the front so when the pressure is released the rubber seal relaxes backwards pulling the piston back. The piston doesn't need to move a great distance in...
  6. The groove the piston seal sits in has straight...

    The groove the piston seal sits in has straight sides but the bottom of the groove has a 5 to 7 degree taper in it. The reason for the taper at the bottom of the groove is to cause the seal to act...
  7. Oil. Don't use grease anywhere.

    Oil. Don't use grease anywhere.
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    835

    I've got two very large old Bridgeport steppers...

    I've got two very large old Bridgeport steppers that were taken off an old CNC Bridgeport but there are no tags on them. The only ID I can find is on the face, "1926749". I bought them in this forum...
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    Google "Mountz" and give them a call. I used...

    Google "Mountz" and give them a call. I used them for a special project and they were able to provide an off the shelf soution. They even sent their local rep to go over my options.
  10. Good job figuring it out! It gets more difficult...

    Good job figuring it out! It gets more difficult when your new barrel is too large to fit through your indexer!
    I made a carbide cutter on my Deckel SO grinder for the proper angles. PSL's require...
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    A lot depends on the size of the company, the...

    A lot depends on the size of the company, the kind of products, and repetition.
    The company I work for has 3 plants at one address. Each plant has it's own QC lab with 8 or 9 large Mitutoyo Crysta...
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    3,027

    I use rubber mulch in my trap too. Nothing I've...

    I use rubber mulch in my trap too. Nothing I've shot (.308 and below) has ever gone more than 28" deep into the mulch.
  13. Many Chinese caliper manufacturers used to copy...

    Many Chinese caliper manufacturers used to copy the older styles of Mitutoyo calipers rather than the new ones. It's only been in the last few years that they were bold enough to steal current...
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    2,307

    Moving the hand isn't the point, a $4 hand puller...

    Moving the hand isn't the point, a $4 hand puller from Ebay is the smartest method. The problem with loosing the mainspring tension preset is that the repeatability is at best, suspect. I've worked...
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    2,307

    Typically the hand is set into final position...

    Typically the hand is set into final position after the main spring tension is set. More than likely the indicator has been dropped at some point and the mainspring pre-tension has been lost. I...
  16. The metal dust from grinding will always drop...

    The metal dust from grinding will always drop downward as it looses speed after it leaves the grinding wheel. Having the vacuum connection at the top of the chute will allow the heavy grit and metal...
  17. The rods are only attached to the end of the...

    The rods are only attached to the end of the table. They hang free near the chuck and have held steady since installed. My grinder didn't have a target plate on the end of the table when I got it...
  18. An old thread on the dust collector I made for my...

    An old thread on the dust collector I made for my KO Lee: https://www.practicalmachinist.com/vb/general-archive/grinder-dust-collector-project-prototype-81863/?highlight=dust+collector

    Links to...
  19. Having lived in the Dayton area for most of my...

    Having lived in the Dayton area for most of my life I'd always assumed that Patterson Tool & Supply was a side business of John H. Patterson who owned National Cash Register. Based on how things...
  20. Patterson Tool history: Patterson Tool & Supply...

    Patterson Tool history: Patterson Tool & Supply Co. - History | VintageMachinery.org
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    Codes are in the back of the software guide that...

    Codes are in the back of the software guide that came with the machine. "E0006: An error has occurred during measurement" i.e." an error of some type occurred during measurement" solution: "...
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    I've done several 54r barrels and have never...

    I've done several 54r barrels and have never experienced chatter. First time I've heard of it being an issue.
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    Since I had a couple questions about my spare...

    Since I had a couple questions about my spare guard I'll just post info here. This is not a sale thread, merely for details on adapting a guard to an S618. Apparently there are (or where) different...
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    310182 310183 310184 310185 Has to be...

    310182
    310183
    310184
    310185

    Has to be rotated 180 to come all the way off.
    310186
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    I have an S618 and I also have an extra one of...

    I have an S618 and I also have an extra one of those Vac-u-guard wheel enclosures I bought (used) for it but never attempted to mount it.
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