What's new
What's new
By:
Advanced search…

Search results

  1. L

    Leaving dies glass hard?

    Hey team. My die making, lapping and polishing is really starting to pick up and I’m really starting to make some nice parts. Lapping bores with 3 micron paste is annoying though… haha. So I did have a question to refine my process… the dies we use are 4140 or O1 - I normally harden them, then...
  2. L

    Scale thickness of EDM sinker?

    Sorry guys I have been away but great answers and I’ll give Makino a call and talk about the possibilities:)
  3. L

    Scale thickness of EDM sinker?

    Hey team. Things are Progressing well here and my die making skills are getting better every day. I’m wondering however we are trying to hit a repeatable tolerance on an EDM sunken part which is essentially a blind hole. We have to sand and lap the bore but are trying to not have to stand there...
  4. L

    Entry Level CNC Lathe with Bar feeder.

    Now that's a great Idea I should have thought of! Looking into it.
  5. L

    Entry Level CNC Lathe with Bar feeder.

    Number of tools I need is only 3, drill, turn a radius and part. Capability of 4 to 6 would be all I need. I'd love 1 live tool on there though. Pretty basic parts. I kinda do need a bar feed because the parts are only 1/2 inch long and I'd be doing as many as the machine could allow. Cheaper is...
  6. L

    Air Quenching 4140

    Mate generally sideways but I know it's not ideal, i'm going to try one with a shoulder and try to drop it straight in.
  7. L

    Air Quenching 4140

    Hey man yeah, problem is where the diameter reduces at the square shoulder from 9.5 to 5.5mm when I quench it, the pin bends at the shoulder. Just trying to remove the step after tempering where I have to turn it down to final D. Adds time and makes truing it up a pain. Thanks -I'll chase up...
  8. L

    Entry Level CNC Lathe with Bar feeder.

    Hey guys, hoping to get some Sub 30k suggestions on a CNC lathe with bar feed. Something has come up that would be awesome, only small parts, mostly copper and brass, don't need huge HP, smaller footprint preffered. Any thoughts where I should start? Max diameter would be 0.4". Thanks guys.
  9. L

    Air Quenching 4140

    Hey guys quick question. I have to hold some tight tolerance on some punch pins, I can pretty much only get 01, 4140 and 1045 in a pinch. I do get some warping with both oil and water quench but do leave enough to hard turn to final D without toooooo much trouble, however wondering if there was...
  10. L

    Help with new lathe ways not straight... ughgh!

    Hey guys, just wanted to say thank you for all your input. The good news (Theres a few bits.) It was the saddle that was bowed. From factory we could slip some decent feeler gauges in there on the back edge. We had to basically take a lot of stuff off it, but noted when the cross slide was moved...
  11. L

    Help with new lathe ways not straight... ughgh!

    I see your point. I really don't have enough indicators to go on, I can only measure of the saddle, and off the chuck/workpiece/test bar. I get what you are saying now and probably responded when I was full of frustration and I apologise for coming off gruff. Certainly not my normal personality...
  12. L

    Help with new lathe ways not straight... ughgh!

    The lathe is brand new. The surface I indicated off was ground with the Vway. It's literally the same part of the way, just the vertical section. The saddle tapers in on the way, it's clearly twisted or hasn't been machined straight. Technician is coming out tomorrow.
  13. L

    Help with new lathe ways not straight... ughgh!

    Link to video of it... Lathe video
  14. L

    Help with new lathe ways not straight... ughgh!

    So i've spent all day inspecting and messing with this. Finally running a mic down the V bed on the side closest to me. It's 0 all the way till about 2 inches from the gap, then shoots out 0.05mm. Within 2 inches. I've never seen anything like it... I recorded a video and sent it to the vendor...
  15. L

    Help with new lathe ways not straight... ughgh!

    So further to this, I spoke with the dealer that is talking to the importer. I measured the gap block and it measures in at 19.06 where the bed only measures in at 19.00. With the alignment pins in it runs out with visable light under a straight edge. I think this lathe is just bodgey as F***...
  16. L

    Help with new lathe ways not straight... ughgh!

    Here is the casting and the pins. Man they are in there, I might drill the casting or try to get these pins out... I think the bolt force should be enough to hold it. Thoughts?
  17. L

    Help with new lathe ways not straight... ughgh!

    So I've removed that section and found 2 alignment pins, they are threaded in and you can see them offset 45* to each other (holes in the top) that go into the casting below... I believe they are out of square to the rest of the way. So do I lap out the holes to move it into position or just...
  18. L

    Help with new lathe ways not straight... ughgh!

    Hey Guys, Recently bought a Taiwanese AL-960B- Was told it's a great lathe for the money. Purchased new. I noticed it's cutting a taper but only right near the spindle, in the last 30mm or so, and it tapers about 0.1mm over that distance. Along the bed up until then it holds dead on. On closer...
  19. L

    Need advice to make a die

    Ok… Progress is slow but good. I found a distributor of round bar and have it coming in O-1.. 125 bucks a meter… ouch. So we have now managed to Find an EDM guy willing to help give this a go, just waiting on the O-1 to arrive. I’ll be making some D-Bit cutters incase the EDM has problems. I’ll...
  20. L

    OT:- Its New Year, whos for losing some weight?

    Yeah unfortunately TRT (or any exogenous source is testosterone) will shut you down, but there’s is lots you can do to promote leydig cell stimulation and pump those T numbers up. TRT is a long term solution I’ll look at in 5 years. However from past experience it’s still way more than normal...

ABOUT PRACTICAL MACHINIST

With more than 10.6 million unique visitors over the last year, Practical Machinist is the most visited site for metalworking professionals. Practical Machinist is the easiest way to learn new techniques, get answers quickly and discuss common challenges with your peers. Register for the world’s largest manufacturing technology forum for free today to stay in the know.

Learn more about us.

STAY CONNECTED

Facebook Instagram YouTube LinkedIn Pinterest Twitter Tiktok

Register Become a forum member. Register today.

Sign Up Sign up for our e-newsletter.

© 2023 Copyright Practicalmachinist.com. All Rights reserved.

Top