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  1. Replies
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    4,254

    It is a lifter slide from an older ESAB oxyfuel...

    It is a lifter slide from an older ESAB oxyfuel cutting machine. Mounted a 90 volt DC motor or 110V AC universal motor to the top to run the torch up and down. Have rebuilt a number of them over the...
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    3,509

    Clamp it tight between 3 boards and drill with a...

    Clamp it tight between 3 boards and drill with a sharp drill.
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    1,784

    Ask to talk to the manufacturers representitive....

    Ask to talk to the manufacturers representitive. He would have access to the latest info and could give you the best advice.
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    2,095

    Load side switching of a VFD will destroy the...

    Load side switching of a VFD will destroy the output IGBTs. Line side switching is not a problem. One mode of operation is to close a contactor and when the VFD charges the motor starts and runs....
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    7,109

    Brazing or cast iron welding. Both would need to...

    Brazing or cast iron welding. Both would need to be properly ground, preheat well to stabilize temperature. Brazing would require a good borax flux. Would be strong and durable. Weld with CAT IRON,...
  6. Field coils like that are really easy to rewind....

    Field coils like that are really easy to rewind. Unwind ist and count the turns on each half, and whether it is on winding or 2 in prrallel. Find a motor rebuild shop and get a length of the same...
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    3,956

    Modern cnc plasma cutters use a fairly standard...

    Modern cnc plasma cutters use a fairly standard PC motherboard for the control computer. Reasonable case shielding, and a good electrical ground keep the high Freq out of the control. A good noise...
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    1,602

    Helium also helps if you are welding in an...

    Helium also helps if you are welding in an overhead position.

    For a much hotter weld you add a small percentage of Hydrogen.
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    1,125

    High freq is generally used on the larger...

    High freq is generally used on the larger systems, it is more expensive. Smaller systems have a system where the gas causes teh electrode to mode away from the nozzle causing a spark. In either case...
  10. And the lawyers will collect millions...

    And the lawyers will collect millions...
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    3,070

    For all the load on the chasing dial gear the...

    For all the load on the chasing dial gear the exact profile of the teath really does no matter. make the gear out of brass or bronze with a reasonable pitch diameter and the correct teeth and it will...
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    5,783

    Actually, that breachblock doen\sn't look all...

    Actually, that breachblock doen\sn't look all that bad. Wonder what the bolt looks like. If the bolt failed to lock properly and came out under pressure...
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    But the forces involved are much greatere with...

    But the forces involved are much greatere with the .410. FOr a discussion the explains some of the issue take a look at http://orions-hammer.com/blowback/. He suggests the a blowback semi auto would...
  14. Thread: radios in a shop

    by kf2qd
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    5,963

    I have worked in shops with and without radios....

    I have worked in shops with and without radios. One shop had one individual who played his hrd rock at full volumn all day. Station that had a small playlist and repeated about 3 times in an 8 hour...
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    2,051

    Have you priced linear ways? Might be cheaper to...

    Have you priced linear ways? Might be cheaper to get a newer Bridgeport. I worked in a shop with a number of Mori's. They used linear ways.
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    1,521

    Build a small hydraulic iron worker. 3/32...

    Build a small hydraulic iron worker. 3/32 thickness and what diameter?
  17. Thread: dro question.

    by kf2qd
    Replies
    25
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    2,149

    It depends omn the glass scale exactly how they...

    It depends omn the glass scale exactly how they work. The cheaper ones work as an encoder, ther are only 2 outputs and the output patter looks like 00, 01,11,10,00... for one direction and 00,...
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    2,893

    It's an empty oxygeh\n tank. It has never been...

    It's an empty oxygeh\n tank. It has never been filled with any contents that will burn. It is just like an air tank. The onlt problem is if you have to rich a prehest flame some fuel may accumulate...
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    For welding steel the concentrator would not be a...

    For welding steel the concentrator would not be a good source. The small amount of nitrogen could affect the weld adversely. For brazing and soldering, no problem.
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    Older Lathes with handy features for threading

    In the past couple of months I have worked on 3 different lathes with automatic feed and threading stops. A Monarch 14" short bed lathe from the 30's, a Hendey 14", also from the 30's and a...
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    Doesn't sound like your application is putting...

    Doesn't sound like your application is putting and load or strain on the fasteners or the delrin. Drill and tap like normal. no need to torque. give at least 6 turns of thread engagement and it...
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    2,785

    A brake drum and Brake shoes. Many years ago I...

    A brake drum and Brake shoes. Many years ago I heard of the Tripp Axle Clutch for gokarts. about half the weight.Original development used a Chevy II brake drum and was used on a 1000cc drag bike...
  23. Use a fence on the opposite side of the board...

    Use a fence on the opposite side of the board from the router bit. I have built a kitchen using that approach. Allowed me to get very straight edges and very good glue joints. My fewnce was a 5 foot...
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    120V is 2 coils wired in parallel, and 220V is 2...

    120V is 2 coils wired in parallel, and 220V is 2 coils wired in series. If 2 wires are connected together then it is most likely wired for 220. It can be hooked to 120 and it will stat slow with very...
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    3,649

    A VFD uses high frequency chopping to form the...

    A VFD uses high frequency chopping to form the sine wave that is fed to the motor. Because of chopper forms a square wave there are some high frequency components and because a motor is an inductor...
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