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  1. Replies
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    . normally wouldnt plunge deep with no pilot...

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    normally wouldnt plunge deep with no pilot hole. bridgeport tends to shake and or vibrates easily. as hole gets deeper the hole will steady end mill shaking so its often bellmouthed 1st 0.1" depth...
  2. many fixtures made for specific part. . if you...

    many fixtures made for specific part.
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    if you needed to hold a 90 degree pipe elbow obviously you need a fixture to hold that specific shape. without fixture often its often impossible to machine...
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    swiss machining, stick out, turn it, then stick...

    swiss machining, stick out, turn it, then stick out some more and turn some more
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    swiss lathes do this automatically some how, on a manual lathe you manually do it
  4. Thread: thread chart

    by DMF_TomB
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    347

    . usually 4 levers and L B 2 R are where they...

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    usually 4 levers and L B 2 R are where they need to be set.
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    had a threading job where i could start nut but the more i screwed it on threads the tighter threads got. eventually figured out the...
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    . could be as simple as part and or fixture...

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    could be as simple as part and or fixture vibrate more in one direction than another. slides often slip stick slip stick. way oil or ability to move smoothly can vary depending on slide design....
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    . beware or be careful of . 1) people trying...

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    beware or be careful of
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    1) people trying to sell stuff. typically saying you need something to maintain job, keep up with the competition, be one of the best, etc
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    2) people giving risky...
  7. no little machine going to be rigid or able to...

    no little machine going to be rigid or able to support high hp
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    when you tilt machines unless its got a gearing when you loosen bolts it can swivel or drop fast cause its heavy. thus fine tuning...
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    in other countries like China I have seen large...

    in other countries like China I have seen large stores where there were many many hundreds of new and used machines like lathes mills grinders , injection molding and punch press machines for sale....
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    . often there is 2 tolerances the .002" per foot...

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    often there is 2 tolerances the .002" per foot is a wavy tolerance and if any parallel passes the lap or height difference between the passes. then there might be an overall flatness tolerance...
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    . many cnc have double row of 60 tool changer or...

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    many cnc have double row of 60 tool changer or holds 120 tools. what exactly you wondering about ? or just wondering that particular brand or model ?
    possible issues with any tool changer
    1)...
  11. . double indicator works 10x faster as you adj...

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    double indicator works 10x faster as you adj tram you aim for same number on both indicators. final check you just use one indicator if really concerned about <.001", never had any problems...
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    . doesnt matter what country you in. if you went...

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    doesnt matter what country you in. if you went to a welding job interview and did a welding test with no helmet 99% of time you aint going to get the job
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    you got any guy from country side used...
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    . it takes rough 1 hp to remove 1 cubic inch of...

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    it takes rough 1 hp to remove 1 cubic inch of 1018 steel per minute. typically brightport vibrates excessively at that rate with common end mills. take 1" dia end mill at .2 depth of cut and try...
  14. . chucking blocks are loose pieces of metal made...

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    chucking blocks are loose pieces of metal made up to hold odd shape parts better.
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    obviously you can use hot melt glue to hold stuff but be aware when temp changes it often breaks free...
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    . servo tuning needs to be done when servo keeps...

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    servo tuning needs to be done when servo keeps oscillating back and forth often for many seconds before hopefully stopping. many cnc have a servo diagnostic screen to see this. +/-1 might be...
  16. . double indicator is much faster. . and if...

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    double indicator is much faster.
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    and if you zero both to back side of table on a vertical mill raise up and check plate sticking up 1" out of mill vise you can check and or set vise jaw...
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    . big mix of people and equipment welding in...

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    big mix of people and equipment welding in China. from very crude to very advanced. depends on who is in charge of job site what is acceptable.
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    obviously walk up customer off the street...
  18. not possible other than press in a bushing. ....

    not possible other than press in a bushing.
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    any knurling or metal deforming not normally acceptable. most would open up hole for bigger dowel pin like a 6mm. or use a roll pin which typically is...
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    plenty of some of the best welders in the world...

    plenty of some of the best welders in the world are in China.
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    obviously some "welders" are not full time professional welders but temp workers often just off the farm.
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    common in China that...
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    bridgeport vibrates if using more than 1hp...

    bridgeport vibrates if using more than 1hp normally.
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    might want flycutter and if tool holder takes insert that fits the 3/8 by 3/8 bit same as used on a lathe, avoid roughing with flycutter on...
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    obviously never used machine that has trouble...

    obviously never used machine that has trouble with sync on slide travel to spindle turning
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    extra tap depth and tap pull out can cause problems. big tap over 3/4" usually resistance to turning...
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    hahahaha . tapping slow going to cause big...

    hahahaha
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    tapping slow going to cause big problems. hahahaha
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    must have been mistaken hand tapping slow for over 4 decades and no problems. got to be cnc people who never do any field machining...
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    . 1) hand tapping is slower usually 20 to 60 rpm...

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    1) hand tapping is slower usually 20 to 60 rpm obviously it works ok
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    2) some machines when at tap depth slide usually Z stops but spindle might keep turning. this extra turning the tap wants...
  24. portable brush plating equipment and you...

    portable brush plating equipment and you literally can apply nickel plate as well as other metals. sometimes called selective plating. its a hand held clothe covered wand soaked in chemicals with...
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    1) most machines have a load meter and that will...

    1) most machines have a load meter and that will tell you roughly how much available motor hp you are using.
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    2) tool length stickout, tool holder length, effects vibration as well as part and...
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