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  1. Replies
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    1,009

    i have repaired fire escapes that were 100 years...

    i have repaired fire escapes that were 100 years old and in bad shape. we were told any handrail needed to hold over 200 lbs continuously in any direction
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    obviously if a group of people on fire...
  2. . many rust preventatives are a spray of mineral...

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    many rust preventatives are a spray of mineral spirits and asphalt tar which gives in general a non sticky wax like coating. usually dont want any or not much oil in a rust preventive cause it...
  3. . cross vial is needed to adjust the sideways...

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    cross vial is needed to adjust the sideways movement of level vial. when on a cylinder and you roll level if vial not parallel to Vee base the vial bubble will change a very large amount. if level...
  4. screw on a piece of precision ground flat stock...

    screw on a piece of precision ground flat stock to the Vee bottom level. not going to take long for a couple M5 or smaller screws
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    2,638

    obviously until any technology is cost...

    obviously until any technology is cost competitive it wont become common
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    when spray metal torches came out they said it would become common to spray metal to shape. $30/lb just for spray powder...
  6. only micron size ultra fine grit would normally...

    only micron size ultra fine grit would normally get circulated. but rust dust contamination should be rinsed and blown off
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    doesnt usually hurt to rinse with clean solvent especially for bearings
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    . Roller bearings can take more load or ball...

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    Roller bearings can take more load or ball bearings are not heavy duty
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    719

    . i had a lathe i had hand tapped a 1.5" 12tpi...

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    i had a lathe i had hand tapped a 1.5" 12tpi thread on and had lathe headstock locked. the force required damaged the pin in gear holding headstock from turning. using a 18" wrench on the tap was...
  9. Replies
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    1,380

    get some infrared flood lights like they use to...

    get some infrared flood lights like they use to keep french fries warm.
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    seen in bathroom over toilet 4 bulbs, 2 heater and 2 lights. usually start sweating and have to turn one of the infrared...
  10. Replies
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    1,552

    malleable iron is heat treated cast iron. Chinese...

    malleable iron is heat treated cast iron. Chinese had it easily 2000 years ago.
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    belt buckles, , pipe fittings, C clamps and many many other items were made from malleable iron long before ductile...
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    1,380

    . some local building codes do not allow a...

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    some local building codes do not allow a heater or ignition source in a garage with a auto holding gasoline as the fumes near floor level might be a problem.
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    try getting a wood stove permit...
  12. Replies
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    1,552

    malleable cast iron been around for about 2000...

    malleable cast iron been around for about 2000 years
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    Malleable iron - Wikipedia
  13. Replies
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    639

    boring bars have a stickout length to diameter...

    boring bars have a stickout length to diameter ratio
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    obviously when you get much above 5 you start have deflection issues
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    1" dia thats 5" stickout
    0.1" dia thats 0.5" stickout
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    when you...
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    sounds like dyes which can fade in sunlight not...

    sounds like dyes which can fade in sunlight not wanted. mineral pigments like carbon dont fade in sunlight usually
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    its like interior paint and exterior paint. interior paint pigments usually...
  15. some coolant types tend to attack certain rubber...

    some coolant types tend to attack certain rubber and plastics over long term exposure.
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    usually coolant just has a easily removable sheet metal cover on it if evaporation is a problem
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    . thats why bare unfrosted light bulbs were...

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    thats why bare unfrosted light bulbs were frosted then lamp shades put on to diffuse light or spread it out. some led lights with no diffusers or shades are harsh on the eyes
  17. . ask Starrett if you have questions. the chrome...

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    ask Starrett if you have questions. the chrome plating cause of pollution control laws many USA companies that used to do themselves now send it to different companies for electroplating
  18. Replies
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    . in general the most important factor is the...

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    in general the most important factor is the length of the drill bit sticking out of tool holder. 2nd most important factor is depth of hole, this effects coolant getting to drill tip
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    obviously...
  19. if trying to impress a girlfriend or wife you...

    if trying to impress a girlfriend or wife you would do better with money spent on a new car like a tesla rather than a water wheel and a line shaft
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    just saying if married and the wife finds out...
  20. . spiral bevel gearing was developed partially...

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    spiral bevel gearing was developed partially for water wheels where you wanted to change direction and increase rpm smoothly. the cost of line shaft and gearing and water wheel will probably a...
  21. . i believe running a generator (even if water...

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    i believe running a generator (even if water powered) then using the electricity through the wires to run motors is more efficient. if generator is making DC charging batteries and a inverter...
  22. most experienced field machinist or millwrights...

    most experienced field machinist or millwrights who do optical alignment will tell you when a optical level is setup on a 4-6" thick floor if no steel beam directly underneath floor if people walk on...
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    anodized layer you can get in different...

    anodized layer you can get in different thicknesses. when its very thick its very very very hard.
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    just saying experience with a thin layer you might under estimate difficulties with a thick...
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    inclusions can be not melted items like carbide...

    inclusions can be not melted items like carbide inserts but usually are slag or metal oxides. molten metal has a layer of slag on top even when they skim most of it off some can get into the pour
    ....
  25. . height blocks (sometimes called chucking...

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    height blocks (sometimes called chucking blocks) are use to support sides (vertical mill) when part in a mill vise so part is clamped on both ends of part.
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    if part only clamped on right side...
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