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Type: Posts; User: dian

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  1. Replies
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    this is easy and simple. make a massive steel...

    this is easy and simple. make a massive steel bushing for the shaft with a medium interferrence fit, reamed is o.k. you will get ratcheting action. get some fine (sub micron) ws2 (or bn or...
  2. Thread: OT Lead Pipe

    by dian
    Replies
    102
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    5,495

    its called collective phychosis. mainly promoted...

    its called collective phychosis. mainly promoted by people making money on it. theres quite a few of these spooking around, global warming and electric cars beeing examples. suported by the need of...
  3. before you do all the work, try some dry film...

    before you do all the work, try some dry film lubricant first. they often call themselves "ceramic", "nano" and similar nowadays.
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    5,101

    "pretty uncommon": so i say it again. i can walk...

    "pretty uncommon": so i say it again. i can walk up to the mill/drill anytime, take a drill out of the index and drill a hole in softer steel thats undersize. the shank will barely go in. a slight...
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    a gage? why this steel? because you had it...

    a gage? why this steel? because you had it around? with 0.6% carbon you might try a marquench, but 8740 might even be hard to get to 50 hrc if is happens to be on the low side of the specs.

    both...
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    glasses wont help much, stand completely clear of...

    glasses wont help much, stand completely clear of the process. i found shrapnel stuck in cardboard boxes over 20 feel away. especially so with full hss blades.

    btw, 1) make a shallow firs cut...
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    none of my slitting saws of this size have a key....

    none of my slitting saws of this size have a key. so yes, what you are doing wrong is not tightening the nut enough.
  8. Replies
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    yes, what else? btw, the charts i know list...

    yes, what else?

    btw, the charts i know list minus/plus tolerances of the expected hole size. no idea how they come up with it though, as the hole is so rough that real size is difficult to...
  9. Replies
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    van der waals is 170 pm (if the source i quoted...

    van der waals is 170 pm (if the source i quoted above is correct). whats the difference? 1:2.5 ratio.

    as i understand it covalent is the distance of the protons in a grid. v.d.w. is looking at a...
  10. drills are so complicated that its a surprize...

    drills are so complicated that its a surprize they work at all. books and dissertations have been writtenon the subject (e.g. prof. hugel).

    as to the rush grinders, they look like you really need...
  11. it is conical with the axis offset.

    it is conical with the axis offset.
  12. Replies
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    no idea what drills you guys are getting. my...

    no idea what drills you guys are getting. my holes are more often too small than too big. and the finish? what do i care?

    thunderjet, out of curiosity, your "45° spotter" is 90°, right?
  13. dont forget GDW.

    dont forget GDW.
  14. such a cutting speed table is pretty much useles....

    such a cutting speed table is pretty much useles. cutting speed mainly depend on hardness. cast irons have a hardness between 100 and 500 hbn. you adjust the speed proportionally (roughly). no idea...
  15. Replies
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    2,455

    can you point me to some info on that?...

    can you point me to some info on that? electrolytic or electroless?

    (i dont think it would work on a diamond blade, though.)
  16. "The idea is that the machine would be for the...

    "The idea is that the machine would be for the people who aren't skilled enough to do it by hand so they don't have to keep asking the people that CAN do it for help."

    biggest problem with drill...
  17. Replies
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    5,101

    a drill that is too sharp is bad, especially when...

    a drill that is too sharp is bad, especially when hand feeding.
  18. im surprized epsom salt has not been mentioned. ...

    im surprized epsom salt has not been mentioned.

    btw, hooking up battery to welder (ac) didnt help. it killed it, if i remember correctly.
  19. batteries are getting expensive and charging...

    batteries are getting expensive and charging devices even more so. whats the point of paying several times the price of a battery? and even then they will recover a batterey in certain instances...
  20. Replies
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    the wheels look like cast magnesium bbs. have...

    the wheels look like cast magnesium bbs. have them on a car.
  21. Replies
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    i would use conctete aggregate.

    i would use conctete aggregate.
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    i find a tapping head not so usefull, btw. i use...

    i find a tapping head not so usefull, btw. i use a set of "tapping inserts", one for every size and the mill does the reversing. i can really rely on the torque setting without having to mess with...
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    yes, thre are several different (types of?) radii...

    yes, thre are several different (types of?) radii reported for ellements, i dont understand the difference. but usually they are not that far off. surprisingly most ellements are 120-250 pm. e.g. i...
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    out of curiosity: what is the component for? some...

    out of curiosity: what is the component for? some electrical application? does grain size matter?
  25. Replies
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    i belive that threads do center. they center on...

    i belive that threads do center. they center on the pitch diameter cylinder. the problem arises when the surface is not flat. on first thought a pointed gage should produce little distortion. second...
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