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  1. Replies
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    . 1) usually end mills made for aluminum are...

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    1) usually end mills made for aluminum are sharper edge rake/clearance and work better than general purpose mills. its bad when end mill dull and aluminum sticks to cutting edge so bad you getting...
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    ask a expert but I believe usually you have in...

    ask a expert but I believe usually you have in over 1 hour per inch thickness cause it takes time to warm up thicker parts (some call it soaking time) so 3" thick thats 3 hours minimum to get 3" part...
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    . milling aluminum dry you can get material...

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    milling aluminum dry you can get material sticking to cutting edge. false cutting edge buildup can cut extra, tends to be unstable as it breaks off and reforms and surface finish is much rougher....
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    headband magnifier most use instead and put where...

    headband magnifier most use instead and put where it wont get lost.
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    also bifocal and trifocal safety glasses are good too, with trifocal safety glasses there is no looking for magnifier as your...
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    had a balloon filled with oxygen and acetylene...

    had a balloon filled with oxygen and acetylene soccer ball size in bench vise and popped with lite torch figuring it fireball, no it exploded, blast wave almost knock me down and left ear, noise so...
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    many use crescent or adjustable wrench on vise...

    many use crescent or adjustable wrench on vise jaw and whack wrench with dead blow or a lead hammer. obviously pin to lock or prevent spindle rotation aint heavy duty. having in back gear some use...
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    . most reamers have some runout wobble and ream...

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    most reamers have some runout wobble and ream oversize on hole entry (0.02 to 0.25" depth) bellmouth depends on part material softness and straightness of pilot hole. soft aluminum or cast iron...
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    . . depends on part shape, material, size,...

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    depends on part shape, material, size, temperature, clamping or chucking pressure, machine not oscillating, tool wear, etc
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    you obviously can bore a hole with a taper from temperature...
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    1,916

    . you want a Chinese government stamped receipt...

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    you want a Chinese government stamped receipt showing chinese metal type you better look at the Chinese metal type and make sure its what you want on the metal cross reference chart. I wouldnt...
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    China Shipyard where they used 10x to 10000x more...

    China Shipyard where they used 10x to 10000x more metal than a typical small USA shop
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    they would show shipyard to over proud Americans to burst their bubble and make them more humble. they make a...
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    in my experience in China you get what you asked...

    in my experience in China you get what you asked for...... If you got a China government stamped receipt with metal analysis nobody going to risk a Chinese jail selling you anything else.
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    99.999%...
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    you aint going to see USA names in Chinese metal...

    you aint going to see USA names in Chinese metal store normally
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    get a dehumidifier that can give you 50% or less...

    get a dehumidifier that can give you 50% or less humidity if you dont want stuff getting rusty, helps with preventing mold too
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    . I have seen many drills break on tool change...

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    I have seen many drills break on tool change and even putting tool holder in pocket by hand have broken drills and drills were made in many counties even USA. yes annoying especially if drill over...
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    . theory is for same dia and length of drill...

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    theory is for same dia and length of drill stickout, a center drill with the smaller dia tip is less likely to wander as much.
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    same reason small dia pilot holes are often drilled. any manual...
  16. supposedly 1.5 million Americans have gotten the...

    supposedly 1.5 million Americans have gotten the corona virus so thats what

    roughly 1.4 million survived (1.3 million not currently sick) and can donate blood plasma and plasma treatment is...
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    . . i use optical tool presetter and many a...

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    i use optical tool presetter and many a spot drill sticking out maybe more than it should has more runnout than it should
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    severe runout and especially if spot drill is dull often it starts...
  18. . . mask is not so much to prevent yourself...

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    mask is not so much to prevent yourself getting virus, mask is 99.9% to limit people who have virus (often have no symptoms) from as easily spreading to others, especially one person surrounded...
  19. malaria medicine been around since before WW2 ??...

    malaria medicine been around since before WW2 ?? and been used what on many many 100,000's of people ?? and is popular in France and other countries which why even with many millions of doses made...
  20. I often set large parts and fixtures (over 40")...

    I often set large parts and fixtures (over 40") to within .0001" and even if tolerance is .0002" I find torque wrench is useful. that and a indicator touching part / fixture while tightening to...
  21. tighten both 1/4 tight, check / adjust, tighten...

    tighten both 1/4 tight, check / adjust, tighten 1/2 both tight, check, tighten full tight, check
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    at 1/4 tight also check with .001" feeler gage make sure its not on dirt or burr
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    316 SS if it has relatively large hard spots of...

    316 SS if it has relatively large hard spots of slag in it will use up tooling 10x to 100x faster than normal. big difference if you got "cheap" SS with hard spots
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    in general a harder metal you...
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    Repeat O Meter used for checking before and after...

    Repeat O Meter used for checking before and after lapping, some use 100mm precision level .02mm/m but obviously need plate level or vial bubble will be off scale
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    . spray on grease for chains and gears has...

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    spray on grease for chains and gears has always reduced noise in seconds for me for like 5 decades, obviously keep gear cover closed if nothing else than some grease and oil sprays off moving...
  25. Excel and the free Calc from Libre Office are so...

    Excel and the free Calc from Libre Office are so similar I go back and forth between them usually with no problems
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    my opinion Calc is a better name cause many Excel spreadsheets use math formulas...
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