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  1. G

    6-32 440C Screws, All Thread, etc.

    I suspect if you got steel grub screws or SHCS from Mcmaster they will be quality made in USA, Holokrome or equal. These are way stronger than stainless steel.
  2. G

    6-32 440C Screws, All Thread, etc.

    My go to is Holo-Krome or some other made in USA high strength alloy steel set screw or socket head cap screw, they are significantly stronger than the SS ones. If that breaks, go to a larger size.
  3. G

    How to clean and brighten lathe ways?

    Excellent summary in my humble opinion. Having the bed planned then scraping it is another option if grinding is not available locally. It worked out to be less expensive for me. The entire process has been rewarding if very time consuming. Another option is to clean it up some, oil it well...
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    Mixing processes (machining, welding, wood) in a 1200 sqft shop?

    I think having hand tools, hardware and stock in reasonably well sealed drawers is another good idea. Keeps the wood dust and metal /abrasive grit from the hand grinders off the precision tools and and fixtures. Open bins and collett racks on the shelves will get icky in my experience.
  5. G

    pneumatic auto jacks

    I remember as a teenager, setting a scissor jack on a cinder block and using my brand new air impact wrench to raise the car. The cinder block exploded like a pipe bomb. That sure left an impression.
  6. G

    Should lathe bed be accurately fitted to a heavy cast cabinet?

    I think if there are 2 massive cast iron parts that are bolted tight together, it would be a good idea to blue and scrape them. Probably does not need to be a precision scraping job, just make sure there is contact near each bolt hole. Another possibility might be some kind of setting compound...
  7. G

    bridge straight edge out of steel

    I found this paper on low temperature creep of steel, abstract only. Kind of technical, I do not really understand the implications of it. Here is a short excerpt "Small plastic and creep strains in eight austenitic steels and a low-alloy steel were measured in the temperature range from 4 to...
  8. G

    bridge straight edge out of steel

    Denis, I am not a metallurgist but here is a theory of mine. You can have a beam that has a very high compressive stress on one side, neutral in the center and high tensile stress on the other side, the part ends up dead flat after scraping. There is no easy way to know what kind of stresses are...
  9. G

    Possible types of steel for this bushing plus alternative recommendations

    DOM, I bought a chunk years ago to repair a PTO post hole digger, the local steel supply shop sold it by the inch, the guy in back sent me up to the office to get a price before he would cut it off. I am glad he did because I bought just the length I needed instead of "just give me a foot or so...
  10. G

    Possible types of steel for this bushing plus alternative recommendations

    I think it depends a lot on what kind of equipment your friend has. I have a old manual lathe that can drill a 7/8 diameter hole 2 or 3 inches deep in steel but it would be annoying and take awhile, guessing 1/2 hr each. I might end up using a couple of different cutting tools to get there. I am...
  11. G

    Possible types of steel for this bushing plus alternative recommendations

    I would be tempted to buy the bushings you indicated that are a little long, this way you have stock that already has a thru hole and outside diameter, your friend just needs to part it off. I have modified pins and bushings from tractor supply a couple of times. They also sell steel shafting...
  12. G

    Why is HSS tool set above center

    Thanks for that info on hone, I learn something new every day
  13. G

    Why is HSS tool set above center

    I did not realize going above center was recommended for carbide for strait OD turning. Are you suggesting modifying or regrinding carbide inserts, I have tried this a few times with some sucess. Not sure what you mean by hone, is this wearing and dulling of the tool cutting edge? I agree...
  14. G

    Why is HSS tool set above center

    Yes let's assume the cross slide is horizontal. I guess 50 or 100 years ago there was a state of the art factory with a row of brand new SB lathes turning out barrels or shafts all day long. The lathes had been properly installed and leveled. The SB factory Rep said you will get best production...
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    Why is HSS tool set above center

    I am no expert on carbide but I think its edge is generally more blunt, "the angle of keenness" (from the SB page in my first post), between the front relief and top rake. This is recommended as 60 degrees for HSS cutting steel. Some examples I have seen of carbide are more like 75 to 80...
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    Why is HSS tool set above center

    Peter, I am not sure if you are asking a question or just making a comment about SB. Assuming the former, here is fig 15 and 16 from the Herco book that shows how changing the height affects the front clearance and back rake angles. I think this chart is true regardless of what kind of lathe or...
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    Why is HSS tool set above center

    I am not sure 5 degrees above center is the best description by itself but the page from the book in my first post has a sketch that I think shows what the 5 degrees means. A line from the tip of the tool thru the center of rotation will be 5 degrees above the horizontal. This amounts to...
  18. G

    Cross Slide TPI

    Sometimes the thread on the lathe may be in a diameter that is uncommon today. You can use the next size larger size and buy or make the new nut.
  19. G

    Wanted: SB Heavy 10 apron rack pinion gear/shaft

    My gears look about the same as yours, I am going to adjust the fit of my used gears by installing bushings for the shaft and shim under the rack. There is a number on the end of mine, I did not realize t was a size so thanks for that.
  20. G

    Cast Iron Plate

    Rubber from inner tubes may be about the right stiffness but in my limited experience can vary a lot in thickness. Might be worse than nothing.
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