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  1. OK I assumed that "they" know what they are doing...

    OK I assumed that "they" know what they are doing but my insert is flat and when I set up the boring/threading tool bar flat, (horizontal) my insert tip has a definite downward rake of 5-8%. I am...
  2. I have only had great experience with LMS. I...

    I have only had great experience with LMS. I bought an 8" backplate 4 years ago. It was cast iron so machined like butter. This backplate was for a SHARS 3 jaw and after I mounted in on my 4o year...
  3. Internal threading tool arrived but not flat?

    This isn't a SB specific question but don't know where else to post. Just bought internal threading bar with insert. Bar has flats on top and bottom for registering it in my 250 series QCTH.
    Why is...
  4. 4 JAW for 1/78-8 Spindle sold for $250!!

    Crazy price for this older Skinner 4 jaw for the albeit uncommon, 1 7/8 x 8 TPI, just sold on ebay for $235 plus $15 ship and didn't even have a key!

    I made mine for less than $130. Bought cast...
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    THanks all. I Understand wear issue,theoretically...

    THanks all. I Understand wear issue,theoretically but I wonder if it will be that significant. The worm drive on the clutch has just 4 segments interfacing with the lead screw so longitudinal effort...
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    Using clutch vs half nut on 10H

    My last lathe was an Atlas, so I used the half-nut to engage longitudinal feed. Seldom use power feed so I have been using half nut lever instead of clutch on my recently acquired 10H, as it is more...
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    Thanks for the insights. I am a hobbyist so speed...

    Thanks for the insights. I am a hobbyist so speed of loading is not an issue. I only use collets for stock <1" for better concentricity and grip but I use 3 jaw for larger. THanks for the heads up...
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    ER40 vs 5C on 10L with 1 7/8" Spindle

    I have a 1939 10H,with the small spindle, 1 7/8"x8. I am pleased with my ER40/32 Collets with an MT3 holder. Why should I have 5C collet envy? Not being facetious, but I don't understand why many...
  9. These were pressed on, so for any replacement you...

    These were pressed on, so for any replacement you will have to drill through the wheel. Many replacements off of any machinery wheel will work. Or spend some money and get the complete tailstock...
  10. Thread: VFD Help

    by Vandegraaff
    Replies
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    2,525

    At less than 1/4 speed you will run out of torque...

    At less than 1/4 speed you will run out of torque and motor won't run. Older motors, 3/4HP and above often had fan blades on the armature for cooling so going slow reduces that. You have 3 belt...
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    Unbelievable find as it was still powering the...

    Unbelievable find as it was still powering the 1929 10R, 36" Bed lathe. Dirty but very very light wear. Only 30 mils backlash on cross slide, ways have a few nicks. This was bought by US Navy, and...
  12. I am replying to this thread with some...

    I am replying to this thread with some measurements that are very different than these, which may be of interest to those doing a search for spindle bearing temperatures.
    I have a vintage, lightly...
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    Oldest Motor Challenge 1939

    My 10R with original Westinghouse 1939, 220/440v 1/2 HP, 3 phase motor. Unusual, pre-ZERK, grease fittings which I replaced.
    Some bearing noise but they don't get hot. Using 1Ph/3Ph VFD. Anybody...
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    But my machine ha an 8" threaded rod with ...

    But my machine ha an 8" threaded rod with knurled end to adjust the flat belt tension. Upon reflection, and the directions in HTRaL, it seems to me you first adjust the belt tension via the threaded...
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    Can't believe I stumped this knowledgeable group....

    Can't believe I stumped this knowledgeable group. Posibly as mine is a 1939 vintage, they no longer had this bolt in later models but my "HTRAL" book was the '43 edition and they mention it
  16. I have the single tumblr and my gearbox looks new...

    I have the single tumblr and my gearbox looks new once I cleaned it up. No visible wear. Problem with this design, and I'm guessing its why SB changed over to dual tumblers, is the top lever, for...
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    10R Underneath belt drive adjustments

    Finishing up restoration of 1939 36" bed 10R South Bend with underneath motor drive in cast iron pedestal. There is a 1/2 inch threaded hole in back of casting.
    In, "How to Run a Lathe", it says:...
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