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  1. Replies
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    973

    A friend wanted a rectangular bar that was an...

    A friend wanted a rectangular bar that was an improved fit in the table slots of his Craftsman table saw, the kind of job you would decline if it was a walk in stranger. I started with a 3/8" X 5/8"...
  2. There is a motor type that will do that nicely,...

    There is a motor type that will do that nicely, called a "hydraulic motor".

    Bill
  3. I have several patents on this subject....

    I have several patents on this subject. Unfortunately, the search system has changed since I last looked and the only ones I could turn up didn't apply here. I think part of the problem is that my...
  4. A company that rented billboard space had a...

    A company that rented billboard space had a problem with their boom trucks. There was no provision for retracting the telescoping boom except to point it straight up and release the mechanical brake....
  5. That is one reason these motors cost so much. I...

    That is one reason these motors cost so much. I used to repair GE tachometer generators with a similar armature. There were three coils per slot, but they were wound one coil in a slot, move to the...
  6. Trying to read an armature with a typical digital...

    Trying to read an armature with a typical digital meter usually means reading the resistance of the leads more than the armature. I have a Wheatstone bridge made by Leeds & Northrup that reads...
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    Besides all that, I have never heard a machinist...

    Besides all that, I have never heard a machinist say a good word about a punch press. Anyone who has been in this business for long has heard countless stories about fingers cut off, etc. Now if you...
  8. Replies
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    973

    I don't run machines like that but I work on them...

    I don't run machines like that but I work on them and watch others run them a lot. Anything but a completely killed piece, meaning multiple heat and chill cycles, is going to warp. They usually rough...
  9. As the auctioneer says, "Don't come in late." I...

    As the auctioneer says, "Don't come in late." I just got around to opening this thread and various of you seem to have done a good job so I will only make one comment. I made a lot of field coils,...
  10. Replies
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    1,327

    Is this the Delta grinder with the spindle...

    Is this the Delta grinder with the spindle mounted on a round pedestal? Make sure you keep it straight. I once let one get crooked and ground up against a shoulder, knocked a chunk out of the wheel....
  11. Replies
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    1,343

    It turns out to be even simpler. If I use the MT...

    It turns out to be even simpler. If I use the MT adapter for a stop, the parts are about 3/8" behind the jaws. The jaws have a concave radius but it is large enough that an indicator reads a low spot...
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    1,343

    I have run this job before and know how to do it....

    I have run this job before and know how to do it. It is an ongoing periodical order from people who use this part in a system they build. The only issue is that centering is a bother. The tabs held...
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    TriHonu and G-coder have just the sort of...

    TriHonu and G-coder have just the sort of solutions I was looking for. In fact, the rubberband holding four strips could be extended to finding the center on a mill by putting the indicator on the...
  14. Replies
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    1,343

    Centering square stock in a 4 jaw chuck

    I am making some manifolds in 2" square 6061 T6. They have each end tapped 3/4 NPT with a partition between them with a small hole to limit gas flow. One end has four 1/4 NC mounting holes. They do...
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    First, to correct myself, it says the part is...

    First, to correct myself, it says the part is made in one machining, not a single chucking. I don't think the grooves are for rings. They are more likely labyrinth grooves, which means that the...
  16. Replies
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    Ask Rehtek what it is. If you explain your...

    Ask Rehtek what it is. If you explain your situation, they should be willing to help. They say it is made with one chucking, so it is probably made on a CNC lathe with live tooling to cut the...
  17. Replies
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    2,416

    Motion, is there anyone with an active mind who...

    Motion, is there anyone with an active mind who does not have a chemistry explosion story? It's a rite of passage. One of mine is about the nitrogen tri-iodide I mixed up in my room at home. My...
  18. Replies
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    2,416

    Make balloons with valves at their tops and a...

    Make balloons with valves at their tops and a lighter, with a refractory material surrounding it and route the parade into an open space, then light it. Hydrogen burns with an almost colorless blue...
  19. Replies
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    I have posted this before. A young fellow came to...

    I have posted this before. A young fellow came to look at a mill I was selling. He was very bright, but not as conversant with a machine shop as you might expect. When I asked if he was a machinist,...
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    I'm a little puzzled in that the picture appears...

    I'm a little puzzled in that the picture appears to be of a Struthers Dunn contactor. Since there are two of them, do you not need two coils?

    Re adding a resistor, there is no reason you can't....
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    Of course, the 564 is over 50 year old...

    Of course, the 564 is over 50 year old technology. The point was that one of Tek's most successful products mixed tubes and transistors.

    Is that a DC contactor for inductive DC loads, with blow...
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    I looked at the solid state replacement and...

    I looked at the solid state replacement and concluded that it shouldn't be too hard, but I have enough spare thyratrons that it wasn't worth investing the effort.



    You mean like the Tektronix...
  23. Replies
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    I fundamentally agree with you. As I have said...

    I fundamentally agree with you. As I have said many times, I keep and sometimes bear arms and have every intention of continuing to do so. Where I diverge with many folks is that a flintlock rifle...
  24. In any case, if people keep the original system...

    In any case, if people keep the original system and don't throw away all the features that Monarch went to a lot of trouble to include, they will have the field loss relay to shut it down...
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    Change the whole system for one little coil?...

    Change the whole system for one little coil? Ridiculous. The two 10EEs I maintain are in constant use commercially and are stock except for the unreliable and expensive timers in the Modular. I...
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