What's new

Search results

  1. H

    Finding center without DRO

    Good morning fellas. We have a part that we are machining and our DRO on the X axis is broke so we are using dials in the meantime. My question is, we have a half moon type part (picture a half pipe) that needs to be bored on the boring mill but finding the center of the X is proving...
  2. H

    torque specs 1-3/4 thread

    Good morning. I'm trying to determine a torque spec for some bolts we made in house. They are 4340 HTSR material and are 1.75-8 and they are 16" long with 4.5" threads on each end. They are retaining bolts holding 3" thick plates together. but I am not sure a torque I should use. Before I...
  3. H

    Large Buttress thread

    Hi guys, we came across a part we have to make for a customer and it has a massive buttress thread on it. The part was pretty destroyed and threads folding over, however I was able to gauge the profile at the bottom of the thread cause it wasn't damaged. (We used a 3D scanner) I basically got...
  4. H

    HSS support calculators

    Good morning, I'm trying to find some information on strength for HSS tubing. I'm using it end for end, its 5"x5"x3/8" wall and its 36" long with a 1" thick welded plate on the end. I'm trying to calculate how much weight that can suspend before failure but I can't seem to find a calculator for...
  5. H

    spindle warmup Meldas 60

    Good morning, I'm trying to write a daily warmup program for our small mill for the spindle, however I can't get the time to dwell properly. This is a Mitsubishi M60 control and while I thought G4P120 would dwell for 2 mins, it doesn't. This is the code I'm using. S1000M3 G4P120 S2000 G4P120...
  6. H

    Machining Nitralloy 135

    Good afternoon everyone. As the title says, I have a job here to make a part from 2" round Nitralloy 135. I've never machined this material and I was wondering what it compares to for turning? I actually need to drill a 3/4 hole through it and then, turn the diameter, and then bore a c/bore on...
  7. H

    Thread RPM

    Good morning guys. I have a question. Might be a dumb one, but when threading on a lathe, what is harder on the threading tool, higher rpm or lower? I ask this because the feed stays the same obviously, and I was wondering if a slightly higher RPM would be less pressure on the tool or more for...
  8. H

    4140 HTSR TGP

    Hi guys. Quick question about this material relieving. We purchase 4.5" diameter Turned, Ground, and Polished because the application requires it to stay straight within a couple thou. They are about 5 ft long. We have to cut some of the top and some of the sides to create like a square boss to...
  9. H

    Potential New machine

    Good morning guys, while i am still in the process of researching this machine that we have proposed to us, I'd like to see if anyone here has this machine or any other machine of the same manufacturer. I have not heard of this brand until recently, and I'd like to get some real world feedback...
  10. H

    Deburring internal threads

    Good morning. I'm wondering if any of you can give some advise to deburr internal threads that have been drilled through. In the case I'm talking about, we have to drill and tap through the sides of nuts, and then they need to screw on the pins, but the burr from the drill and tap is hard to...
  11. H

    Tapping 2.5" NPT

    Good morning. Anyone ever cut with a 2.5" NPT tap? I'm not talking about chasing a hole, but rather actual cutting. Here's the thing, we have to make a 2.5" NPT thread in a part (Cast Iron) but it's too high for our VMC to threadmill, and we just have a manual boring mill otherwise, but it...
  12. H

    Formula to change rpm on threading cycle

    Good afternoon. I was wondering if any of you know the formula to be able to change rpms on a thread cycle on a lathe while maintaining start point. I have a thread that has started chattering really bad halfway and i want to change the rpm, but if I do, my threads won't line up. Is there a...
  13. H

    Machining rubber

    Good afternoon. What do you guys use for tools for rubber? I have some parts I need to face off about 3/8" and I tried using a polished aluminum geometry dnmg to do it and it still doesn't cut good. Then I need to make 2 holes 7/16" diameter about 3/4" deep. I tried an aluminum endmill, however...
  14. H

    CPU interrupt

    Hi guys. Lathe did this to me this morning and did it last week one time. I had just shut it down and restarted, but after it doing it again today, I'm kind of concerned. Does anyone know what may cause this to happen? Both times it for it to me when I went into edit mode. It's a fanuc 21i-T...
  15. H

    Face groove help

    Good morning guys. I'm having trouble with the conversational programming on our CNC lathe for face grooving. It's a 21i-T control. As you can see in the screen shots, I'm trying to make a face groove .254" width x .266 deep. The problem I'm having, is the groove when watching the graphics...
  16. H

    Low gear turning

    Good morning. Going someone might know something about this issue. I'm on a BV560 MG CNC lathe and I'm running a large diameter part. I had to put the machine in low gear to run it. This isn't a problem, there's a mechanical lever that switches the gears and then M41 is entered in the program to...
  17. H

    Large Ballnose EndMill

    Good morning. I'm looking for a 2.5" diameter ballnose endmill but can't seem to find any online. Largest I could find was 2". Any of you know where I could get my hands on one? Or better yet, do they even make that size? 2 FL HSS will suffice, (don't think I'd want to even see the price of a...
  18. H

    Mitsubishi M64S Rigid tapping

    Good morning, I have a VMC with a Mitsubishi M60S controller and for the most part, I've figured the machine out. The issue I'm looking at is rigid tapping. I have a Mastercam post that was used on this machine before we owned it and the code outputs with an R1 value. I looked around online and...
  19. H

    4140 differences

    I've heard many different designations of 4140, I'm wondering the differences. Even when I search on the net, it seems to bring up different types than what I'm actually looking for. Are some of these not actual standards and just "slang" per se? 4140 pre hard 4140 HT 4140 QT 4140 HTSR 4140...
  20. H

    Accidental post

    Please delete.
Back
Top