r/Machinists

According to this op sheet, which insert would you use

Stuck a piece of threaded rod in the chuck and then used some washers to level it out over the chuck jaws. Without a doubt it was sketchy but worked better than planned.

Cadmium is highly toxic, and from what I've read has been largely phased out as a plating for a good long while. Date on the print is November 2019. Doctor friend of mine saw the pic and immediately said "HARD no."

I’ve outlined my machining process in the video. You can review and learn from the steps. When machining thin-walled shell components, internal stress relief is absolutely critical. After roughing, I heat-treated the stock and let it rest overnight to fully release machining stress and prevent distortion.

I used a Dean 5-axis and DMG 3-axis machine. I had to machine very carefully to avoid part deformation from excessive cutting forces.

After I finally nailed this challenging job, the operations manager complained that it was a trivial part with just a -0.02mm tolerance, and asked why it took me three days. I stayed silent. This part is now in small-batch production. I’m trying to figure out what to say at delivery to make this arrogant person pause. I also want to ask everyone: do you think this lead time is reasonable?

Major changes:
- 5x power increase to 1.2hp brushless sewing motor
- 2 axis DRO
- complete stand alone control until with spindle rpm meter
- tappered roller bearings 17.5mm to replace 16mm china crap bearing
- engine and gearing compartments sealed with rubber liner
- Main housing bolts replaced from crap china to proper machined shoulder bolts
- everything rebuild and re greased

A friend of a friend is getting married and asked if we could engrave a rifle for him. I made a custom parallel up to hold it by the angled magwell and on the bottom, then machined some plastic to hold it on top because it had fine serrations I didnt want to clamp onto. Turned out pretty cool.

Chip evacuation seems solid. Toollife is good. Please advise on feedrate

This vacuum form mold Took a total of 55hrs. This op is only finishing.

Disclaimer: Not a toolmaker.

I ran out of X travel on my lathe and have to cut the face on this weldment. Modified a DDJNR-164 into an offset facing tool. Gained me an extra ~1.5 inches of X. Time to see how this shit show works out.

Thankful for my respirator! Keep your coffee cup covered...

Whether it’s and OD or ID chamfer I will always get a burr on the face. Do I need to change where I place my G41/G42? When sending programs to my machine I have to change the placement of the g41 if it’s on a Z number on a facing cycle because the tool will keep feeding down on the X instead of only on the Z when completing a pass. I am using an Okuma Genos 250L. Any advice would be appreciated.

A few photos of a batch we’ve just finished manufacturing for holding oilfield pipe during thread turning.

Each chuck has a pneumatic cylinder built into the body. The lathe uses a front-and-rear chuck arrangement, with the pipe passing through the large central bore and being gripped at two locations.

These are still on the shop floor in the photos, before installation. The person in the second shot gives a better sense of their size.

Anyone here running a similar setup for pipe threading? Are you using pneumatic, hydraulic, or manual chucks?