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  1. J

    11 Kw 380 volt motor tripping 80 amps automatic fuse, what to search for?

    yesterday the screw compressor had to be serviced and it was found the bearing of the cooling vent was shot. the service tech just said there no longer were parts available and left. the identical spare compressor was pressed into service but tripped the 30 amp automatic 3 phase fuse block as...
  2. J

    are a Dahlander 2 speed motor and a vfd compatible?

    i wonder if i could, without problems, connect a vfd to my lathe that has a Dahlander 2speed motor. the lathe has a lever on the apron to select the high and low electrical speeds and to get from the high speed to the off position the lever passes the low speed.
  3. J

    chrome plating / anodising of aluminium? aircraft rims possible?

    a customer has some aluminium? rims of an airplane he wants to have a nice shiny surface. they are not going on an aircraft ever again, it is just for the looks. can they be chrome plated/ anodised ?
  4. J

    can i expect 420 stainless to be workhardening in turning?

    as the title says, and if so, how easily will it workharden?
  5. J

    does a wedge bar chuck have advantages on a manual lathe?

    while clearing out stuff in the shop i found a wedge bar 3 jaw chuck with two piece jaws in seemingly good order it would be the right size for my lathe and i have a backplate i could use. usually i have a big four jaw mounted, i have a scroll type 3 jaw chuck that is o.k. but i like the idea of...
  6. J

    do i read this drawing correct?

    i got this drawing to make a tool as i see it, it is a disk with a circular groove cut into the face of it my problem is the fact that the disk seems to have three different thicknesses the middle part is parallel to the bottom the outer ring seems to vary in thickness i guess i must be...
  7. J

    need a special four jaw chuck? make your own

    YouTube every tool in the video, apart from the carbide endmill and the tap, he made himself...
  8. J

    what does this spec mean?

    Material-OHTS heat treat to RC 45-50 The heat treat is clear to me but what is the material? It is the spec for a tool in the aircraft maintenance industry.
  9. J

    how repeatable should a L0 spndle nose be?

    whilst repeatedly taking off and putting on the backplate for the burnerd collet chuck i am fitting to it, from the spindle i found out that it does not measure exactly the same after having taken it off and having put it on again. the front is wobbling about two thou after it was taken off and...
  10. J

    need help in gettting a precision angle on the lathe

    my burnerd collet chuck has a short taper cam lock built in my lathe has a L0 spindle nose i want to adapt a backplate to fit the short taper the angle of the short taper seems to be 7-7'-30'' how much do i offset the compound over a distance of say 20 mm to get the right angle? my calculator...
  11. J

    how much runout can i expect with burnerd multi size collets?

    i bought a burnerd multi size collet chuck with collets as is has no L0 taper i will adept a backplate to fit the lathe to avoid chasing my tail it would be nice to know what i can expect
  12. J

    how to attach a diamond to a rod to make a wheel dresser?

    I have got some industrial diamonds and would like to attach the biggest one to a rod to make a wheel dresser. But how are they attached?
  13. J

    OT is PM using cloudfare software that keeps giving 502 bad gateway messages

    Since a day or two i cannot open certain threads as a screen will pop up stating: "You were visiting a Cloudflare customer’s website, and something went wrong. Don’t worry, it’s not your fault. If the problem isn’t resolved in the next few minutes, it’s most likely an issue with the web server...
  14. J

    what is this cloudfare thing?

    it started a couple of days ago, i would click a thread and the screen is taken over by cloudfare stating that the site cannot be reached some threads work just fine others always give the same problem anyone else got the same problem?
  15. J

    bridgeport type kondia mill making noise

    my kondia started making a rattling/squeaking noise some time ago it came within a couple of hours timespan it only happened while milling not while drilling i took the head apart and replaced the three lower quill bearings the drive belt from the variable speed head looked okay, but what do i...
  16. J

    what size of spindle nose do i have?

    my lathe has an tapered nose to attach the chuck onto. The od diameter of the threads on the backplate is 4.5 inch. What size goes with that? L0 seems to be the size, as L00 is too small
  17. J

    # 30 toolholders with only one drive pocket

    I bought a couple of toolholders for my mill but they only have one pocket in which the driving block of the spindle will lodge. Can i just take one block out of the spindle and use them? Obviously it is possible in some machines but in a bridgeport clone? They are probably surface hardened up...
  18. J

    feed wheel and andle on a brdgeport

    My Kondia is a near 100% bridgeport clone as far as i can tell. It came without the fine feed wheel. I want to make the wheel myself but cannot figure out how it is held onto the tube. It looks like the circular motion of the handwheel is transmitted to the machine by means of two protrusions at...
  19. J

    tig machine keeps tripping braker, workaround?

    In the old shop we had 16 amp fuses and the tig worked fine. After the move to the nem shop the tig keeps tripping the breaker although it is rated 20 amp. However it is a 20 amp fast and the fuses were slow. It is a 200 amp machine and we dont need that kind of power, half of it would do fine...
  20. J

    milling cast iron, avoid wharpage/stress, vertical or horizontal mill?

    I have got a 4 foot long 3 inches wide half an inch thick piece of cast iron. It is actually T-shaped and the flange is about 8 inches high and also about half an inch thick. I cut it out if the bed of an old lathe before it went to the scrappers. I want to convert it into a camel back type...
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