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  1. Replies
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    2,879

    Looks like a great tool...pricey, though. What...

    Looks like a great tool...pricey, though.
    What do you suppose, "machine soldered" in the "ringer" description means?
  2. Now I see the photo. Looks like you might be...

    Now I see the photo. Looks like you might be able to make a new one out of a single 12.9 grade bolt, if you can find one of the right diameter and pitch combination. A bolt would have the advantage...
  3. I echo that it is likely to be 1mm pitch. 55 deg...

    I echo that it is likely to be 1mm pitch. 55 deg is about as likely on a bike from that era as 60 deg.

    A photo would really help. Most European bikes had no threads on the crankshaft. The shaft...
  4. Replies
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    2,287

    If you have a lathe on which you can propose to...

    If you have a lathe on which you can propose to make a tap, why not single-point the internal threads you need?
  5. I would vee all breaks from both sides down to a...

    I would vee all breaks from both sides down to a 1/8" to 1/16" land, clamp to a heavy plate or heavy angles, heat the whole thing up slowly (2 hours to temp) with multiple propane burners or a bed of...
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    I have never seen them in-the-flesh, but I...

    I have never seen them in-the-flesh, but I assumed for coil spring, drilled lengthwise and then the helix milled with an endmill.

    You do not ask, but I do not like the idea. Metals are not...
  7. I agree with BillD that it seems crazy to machine...

    I agree with BillD that it seems crazy to machine from solid...wear parts should be replaceable on the durable hub.

    But if you have to make it as shown, I am with Thermite that I would make a...
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    Your business model is nearly what supported me...

    Your business model is nearly what supported me for 40 years. BUT I am a "dungeon" or maybe more accurately a "junkyard" type. And "bring me only the part you need worked on, clean", may work for...
  9. I have never taken a jig borer apart, so I am...

    I have never taken a jig borer apart, so I am ready to be corrected, but the spindle bearings on a drill-press are made to carry a heavy thrust load....a jig-bore spindle needs great lateral...
  10. The extreme machinability desired for...

    The extreme machinability desired for screw-machining comes not only from the composition, but also the condition--heat-treat or cold-work. And a lot of it is low ductility, so that chips break. ...
  11. Most stainless springs are work-hardened...

    Most stainless springs are work-hardened 300-series. They never get as hard/strong as heat-treated carbon spring steel. For a small spring as you describe, probably you want to make it out of...
  12. Evolution of lubrication systems is interesting. ...

    Evolution of lubrication systems is interesting.

    I use a 1931 Farmall tractor, with 4 cylinders but only 2 main bearings, both ball. A gear-type oil pump supplies oil to the governor, and to a...
  13. Replies
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    Not mine, DG61. The one near here got bought by a...

    Not mine, DG61. The one near here got bought by a neighbor, who cut it up and will be using the boom sections for culverts.
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    Inspect the boom on that think carefully before...

    Inspect the boom on that think carefully before using it.

    I almost bought one for insurance salvage after it rolled off trailer and over. The booms on them are over-reinforced on bottom for the...
  15. Replies
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    McMaster calls it a "sex bolt"

    McMaster calls it a "sex bolt"
  16. Replies
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    6,365

    I know a shop that scrapped a $5000 piece because...

    I know a shop that scrapped a $5000 piece because they were too cheap to make a boring bar.

    Good job!

    What make is your lathe?
  17. If the problem is the circumferential crack I see...

    If the problem is the circumferential crack I see in the elbow, I'd fix it in ten minutes with 5-minute epoxy and torn bedsheets. Rip 2" wide strips of sheet, soak in liquid epoxy, and bandage the...
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    I, too have done quite a bit of cast iron welding...

    I, too have done quite a bit of cast iron welding over the years.

    Exhaust manifolds and grate bars IME are the worst to weld. Manifolds tend to be thin and large, and both often act barely...
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    Thanks for all the thoughts. The stone my...

    Thanks for all the thoughts.

    The stone my son got is a long ellipse, with a nearly square cross-section. Looks like Al2O3. The oval-section scythe stones I have used, like the ones Joe...
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    I like the chicken-crate idea....Also possibly...

    I like the chicken-crate idea....Also possibly for making wooden flutes. I would guess the hole-spacing is adjustable...Do the bevel pinions have setscrews?
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    Wet or Dry Sharpening

    My son bought himself an Austrian-style scythe. Brought it here for help setting it up. I have a fair bit of experience with American-style scythes, and find them more rugged than the Austrian, but...
  22. You might make a couple of special fixtures that...

    You might make a couple of special fixtures that you can use with many different parts.

    One would be like a vise with very shallow jaws. The fixed jaw has a sharp edge the cuts into the work, top...
  23. I have soldered and brazed quite a few fuel...

    I have soldered and brazed quite a few fuel tanks. The old ones were terne plate...a lead-tin coating, easy to solder where not rusty. Aluminized steel would be hard or impossible to solder or...
  24. Find a scrapyard with an alloy gun

    Find a scrapyard with an alloy gun
  25. Well, Tom, I have a last (maybe) e-mail in to the...

    Well, Tom, I have a last (maybe) e-mail in to the mfr asking about exactly why the new armature will not work in the old fields, but I think they already realize I am not a good sales prospect.
    ...
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