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Recent content by Bill D

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    milling machine bearings

    ATF is one of the worst possible lubes for non filtered machines. It has lots of additives to keep gunk suspended so it can be pumped to a filter. With no filter and no pump it just keeps clouds of gunk floating to all moving surfaces. A proper oil for your machine would be non detergent so...
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    New (to me) Boxford AUD lathe questions

    There is no drive tang inside the quill. I have one live center on a too short arbor. It should stick out longer in the back. I tape a nut onto the right hand end and it will eject when the quill is cranked all the way in. Bill D
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    New (to me) Boxford AUD lathe questions

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    OT- Tour of Ed Pink's race engine shop--soon to be torn down to make a bus stop

    https://www.bart.gov/news/articles/2022/news20220708-2
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    Machinability of Pewter

    I would assume electrons are much easier to steer at sharp angles in short distances. So smaller machines to better fit inside a room rather then a full warehouse size experimental chamber. Further I would assume the lighter mass electrons would be generated at lower input power needs. Bigger...
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    New (to me) Boxford AUD lathe questions

    The best book for a SB of that vintage is " how to run a lathe". I believe the army manual I linked is a just a government reprint of that booklet. It is based on the 9" SB lathe
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    milling machine bearings

    I think you are confusing Gear oil, SAE and ISO numbers. #80 gear oil is about #20 SAE, #120 ISO Bill D
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    Machinability of Pewter

    I think pewter is probably like brass. Lots of slightly different alloys, slightly different machining abilities, slightly different uses. Hot rolled, cold rolled, stress relieved etc., I bet you will need to be fairly specific when ordering. Bill D
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    OT- Tour of Ed Pink's race engine shop--soon to be torn down to make a bus stop

    Reason the original BART did not go to the SF airport was SF taxi drivers lobbied hard to keep their jobs. Bill D
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    OT- Tour of Ed Pink's race engine shop--soon to be torn down to make a bus stop

    It is not 6' gauge it is 5 foot gauge for a slightly better ride then standard 4' 8.5" with less side to side rocking. This is Russian/Indian gauge. I think even "modern' Russia knows more about trains and tracks then the Roman Empire did at it's height while laying roads for carts with 4'...
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    Drinking from the VFD info firehose

    NO = normally open NC = Normally closed
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    New (to me) Boxford AUD lathe questions

    Not sure of your description of the motor wiring issue. At first it sounds like the switch outputs are just reversed. BUT "power drive table"? Do you mean the spindle rotation is reversed but the apron motions,infeed/outfeed and traverse are not. AFAIK there is a lever on the apron to...
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    OT- Tour of Ed Pink's race engine shop--soon to be torn down to make a bus stop

    My mother in law got notice they wanted to widen her road. Literally across the road from the Onterio airport in the barrio. They offered numerous properties in the county they had foreclosed on. All were in bad areas. but probbaly equal low value. She held out and they bought her a brand new...
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    ot; DRILLING 1.25"diameter hole with hole saw through quartzite. I need to drill several 1.25 Diameter holes through. a quarztite shower surround.

    Further info, the quartzite is floor to ceiling on an outside wall. I really do not want to penetrate the outside stucco and hope to seal it leak free. It looks hard and glassy much harder looking then slate. Diamond bits huh. Maybe time to hire it out. Bill D
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    ot; DRILLING 1.25"diameter hole with hole saw through quartzite. I need to drill several 1.25 Diameter holes through. a quarztite shower surround.

    Site does not allow me to add more to my original message soo.. I will use flood water coolant. Chipping is not a concern. This is to mount grab bars. Stud finder does not work. I would guess quartzite is one inch thick or so. It is not quartz which is all I can find info about. That info...
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