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  1. GailInNM

    Simple center finder for small holes

    OK. We have a part and need to locate it in the mill by "picking up" (locating the center) of a hole. If the hole is 1/8 inch (3mm) or larger it is no problem using a DTI, but when the hole is too small for this it starts to become e problem. In the past I have used a wiggler and centered it...
  2. GailInNM

    Bridgeport simmple knee dial mods for the visualayimpaired

    Current plan is for 3 wide viewing angle white LEDs mounted close to the index mark. This is so a least one of the numbers on the dial will be illuminated at any time. I will mold the LEDs in a filled epoxy that contours to match the area near the dial and then mount it with double stick carpet...
  3. GailInNM

    Leaded steel

    1144 is also available as TGP (Turned Ground Polished) for use in Swiss style CNC lathes. It costs more of course but can save considerable time when making some parts as the OD is accurate enough for bearing fits with out any additional work. Gail in NM
  4. GailInNM

    Tooling storage on the toolroom lathe

    One additional photo I forgot to post. I engraved label strips with both fractional and decimal sizes to go on all the standard size collet hholes. Gail in NM
  5. GailInNM

    Tooling storage on the toolroom lathe

    I bought an ACRA toolroom lathe almost 20 years ago. The ACRA is a very accurate copy of a Hardinge HLV. If the Hardrige had a 10-32 hole tapped in the ACRA has one there also. It is made by Cyclematic in Taiwan. This means that all Hardinge accessories are bolt on so additional tooling is...
  6. GailInNM

    Bridgeport simmple knee dial mods for the visualayimpaired

    DJP, I don't think that an audible signal would improve things a lot for me. I can't think of a way that it could be bidirectional with any real degree of precision. Also, with my touch screw I know quickly which direction is the shortest way to zero and an audible might slow the operation...
  7. GailInNM

    Bridgeport knee crank retensiion

    A knob was made up out of 1-1/8 diameter steel 12 inch thick. The knob wants to be made of a heavy material so it will rotate about 3 turns when flicked with a finger after being loosened. The recess around the screw positions the knob so there is about 1/32 inch of play in the crank position...
  8. GailInNM

    Bridgeport knee crank retensiion

    This mod won't improve the precision of a Bridgeport milling machine, but it does eliminate two sources of irritation of operation. Over the last 35 years that I have had my BP I have probably knocked the crank off its axle al least 500 times necessitating picking it up from the floor. The...
  9. GailInNM

    Bridgeport simmple knee dial mods for the visualayimpaired

    First off to set the stage, I started having vision problems about 20 years ago , Today I have been legally blind for about a year and a half. This means that to see any detail I need lots of light, and magnification. I have lots of overhead light and various magnification items. But on the...
  10. GailInNM

    Leak around spark plug

    Also check the threaded hole in the head for any possible burr caused by the tapping operation. It's a good idea to countersink the thread SLIGHTLY to remmove any possibility of a burr being formed when tightening the plug. Gail in NM
  11. GailInNM

    Leak around spark plug

    If using a copper washer it should be at least 1.5mm and preferably close to 2mm thick. The washer supplies with NGK CM-6 plugs measures about1.9mm thick when new. If the plug has been tightened up a few times on the washer then the washer should be removed and annealed by heating to read heat...
  12. GailInNM

    1/4 40 tip lock but

    In the USA they are in quite common usage as nuts for Switchcraft products such as charging jacks and mounting nuts for mounting nuts for small toggle switches from many manufactures. Here is an eBay listing for replacement plated brass nuts...
  13. GailInNM

    Baffled, bewildered and confused.

    Gary, Welcome to HMEM. The best forum for your questions would be: General Engine Discussion. You will get the best results if you make the title as specific such as "Oldboatguys beam engine question" as this gets members attention who are familiar with what may be looking for. Don't worry...
  14. GailInNM

    Spark Plug constructlon revisited

    A third method of making the washers is really just a rehash of the punching of boh the ID and OD. The punches are the same but the die has a guide for the punches built in. This allows the punch/die set to be used in an arbor press or the the punches to be driven with a small hammer. The...
  15. GailInNM

    Spark Plug constructlon revisited

    Another method of producing the OD is by punching with a setup similar to that done when punching the ID. The punch is made from 1/4 stock and has a pilot turned on it that is a close sliding fit in the ID of the washer. It would be possible to drill the rod and insert the pilot, securing...
  16. GailInNM

    Spark Plug constructlon revisited

    Thanks for the comments. All are welcome. If you have a different way of doing things please post them. I apologize for the time lapse in this thread. Life has a way of getting in the way of playing with toys., There are a couple of ways of cutting the OD of the washers. The first way...
  17. GailInNM

    Spark Plug constructlon revisited

    A couple of holes are punched. And then a bunch. Notice n the photo that I got some of the holes too close to each other. This will make cutting the parts apart with snips or a saw difficult while leaving enough material for the OD. This will only affect one of the methods that I will...
  18. GailInNM

    Spark Plug constructlon revisited

    Since the washers are being made of soft copper the punch and die can be made of any mild steel and does not need hardening of any kind. Unhardened it would be good for at least 500 holes and then a touch of the die on a belt sander would make it good for another 500. I made the punch by...
  19. GailInNM

    Spark Plug constructlon revisited

    Moving on to the third method of putting in the 0.190 holes. The holes are punched with a very simple punch and die set. I have a foot press, AKA Kick press. that I normally use. As these are not common in most home shops I set the punch and die up on my small manual mill which has a 6x24 inch...
  20. GailInNM

    Spark Plug constructlon revisited

    Just to show how out of date I am with the technology of on line shopping I looked on Amazon with a search for copper sheet and found many listing for 23 and 24 gauge copper sheet. 23 gauge is 0.025 inch thick and 23 gauge is 0.021 inch. Either would work OK but I would prefer the 23 gauge...
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