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  1. So that’s about 200 SFM....slowing down the speed...

    So that’s about 200 SFM....slowing down the speed has become my go-to trick for chatter in both turning and milling. I’m turning 4340 right now at 125SFM to keep the chatter monster away. Also,...
  2. Haha! Indeed! I laugh at myself how often I’m...

    Haha! Indeed! I laugh at myself how often I’m like, “okay...I think it’s 1/2” so I’ll grab that and I’ll bring the 9/16” just in case.” And it turns out to be 5/8” haha!
  3. I’ve never had it but a couple close friends have...

    I’ve never had it but a couple close friends have an it seems like the general consensus is “painful joints and lack of energy.” It also seems like it’s not as straight-forward to diagnose and/or...
  4. We had an old timer that used to wrap parts in...

    We had an old timer that used to wrap parts in newspaper in an attempt to do the same thing. I know he did it but I don’t know if it actually worked.
  5. Thread: Saw upgrade

    by Nerdlinger
    Replies
    16
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    1,044

    Disclaimer - I deal exclusively in steel, not...

    Disclaimer - I deal exclusively in steel, not aluminum. I was taught that the speed is just a chart depending on the blade and material you are cutting. Then you increase feed pressure until you...
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    2,197

    I have a TCN2600 Tak...single spindle with gantry...

    I have a TCN2600 Tak...single spindle with gantry loader and flip over device. No live tooling. It’s been making parts every day for years. We’ve been very happy with it. Load up the blanks and...
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    Hmmm, if it’s a sphere of constant radius does it...

    Hmmm, if it’s a sphere of constant radius does it really matter if the nib is in the center upon flipping? Blue it up and creep in on it in Z?
  8. Replies
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    925

    Final update - the cobalt knurls were lasting...

    Final update - the cobalt knurls were lasting around 80-100 pcs before fracturing. After replacing them with a HSS wheel we made over 1,100 parts with no problem (no change to the program.) The job...
  9. Input torque [in.lb.] = (friction coefficient) X...

    Input torque [in.lb.] = (friction coefficient) X (fastener diameter [in.]) X (clamping force [lbs.])

    So yeah the “friction coefficient” has the same effect on the calculation as the “correction...
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    925

    Yup! I guess if deflection or overloading the...

    Yup! I guess if deflection or overloading the axis was a problem I would go straight to cut knurling but if the HSS wheel solve the cracking problem I will probably just call this done for now. The...
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    925

    Well sure as shit the change to HSS wheel has...

    Well sure as shit the change to HSS wheel has made all the difference in the world. The cobalt wheels were breaking between 80 and 100 pcs and we are up over 500 pcs (and still going) with the HSS...
  12. Assuming you have experience with CNC milling it...

    Assuming you have experience with CNC milling it might help to know that a lot of people call G112 “mill mode” where X, C, and Z in your lathe code behaves like X, Y, and Z, respectively, would...
  13. Replies
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    925

    Plug - the accutrak guy emailed me saying he saw...

    Plug - the accutrak guy emailed me saying he saw the order come through for the HSS wheels and is sending them to me for no charge. Despite the initial challenges with the wheels blowing up they...
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    925

    Even on a straight knurl? That's what I wanted...

    Even on a straight knurl? That's what I wanted to do since our diamond pattern cut knurls never give us trouble but the accutrak guy talked me out of it. Maybe I should have trusted my gut...
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    925

    Well I'm really excited to hear that you have, in...

    Well I'm really excited to hear that you have, in fact, run into problems with cobalt...hopefully that's about all there is to it! Thank you! The Accutrak guide says to dwell for 5-25 revs, so...
  16. Replies
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    925

    Straight Form Knurls Breaking

    Hi Everyone,

    Machine - Tsugami B325 Swiss with oil
    Material - Annealed 41L40 (see pic)
    Tool - Accutrak 64XDP cobalt straight form knurl wheel

    I am setting up an old job on a new machine and...
  17. Yeah the Ren probe cycles on my Brothers don’t...

    Yeah the Ren probe cycles on my Brothers don’t respond to feed hold or even cranking the feed/rapid knobs down. I hate it.
  18. I wonder if you took a tube with one end closed,...

    I wonder if you took a tube with one end closed, drill a hole in closed end just big enough for your hex head cap screw to go through, put the open end of the tube over the dowel and start turning...
  19. .004” isn’t too hard to find either, but again...

    .004” isn’t too hard to find either, but again huge trade off with insert life. Is cutting a shallow and narrow groove below the shoulder an option?

    318840
  20. I think you would receive VERY valuable feedback...

    I think you would receive VERY valuable feedback here if you could post some representative sketches of parts you’re talking about. There’s a couple Tsugami guys here, Teachme is a Citizen wiz, etc....
  21. I think they’re roughly comparable in cost. We...

    I think they’re roughly comparable in cost. We got a 38mm sliding headstock with independent sub spindle, XYZ on both spindles, 12’ FMB magazine bar feed, and high pressure coolant system for like...
  22. Yeah, what's the value in your tool radius...

    Yeah, what's the value in your tool radius register? I know you said it's working now, but still, just curious. In most cases the G41 move has to be at least as great as the radius of your...
  23. Replies
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    What can a groove tool do that a parting tool...

    What can a groove tool do that a parting tool can’t? (Unless the groove shape cannot actually be generated with the cutoff.)

    For instance, If you have a .095 x .008” CR cutoff and need a .250”...
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    Iscar (and others) make a “multifunction” tool...

    Iscar (and others) make a “multifunction” tool that kind of looks like those insert drills that use the two little square inserts but this one only has one insert that passes past center a bit so it...
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    You could try sending that collet out to...

    You could try sending that collet out to carbinite to get coated. A #1 coating adds .003” per side so your collet would a little on the small side but that could actually help since the corners...
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