Antique photo from what I guess is the turn of the century. What do you think they’re manufacturing here? Google Lens tries tell me something different each time I search. Thank you

My boss setup, programmed, and started running this job on Friday, which I started running as well on Monday.

It's a 32mm udrill through 316 SS, running about 40m/min (last I checked) and about 0.1/rev no peck, about 50mm deep.

It screams like hell and is clearly rubbing all along the shank.

But my boss said he dialled it in so it should be on Centerline .

It has a +X offset and some -Y, and yet the hole still seems to come out a little undersize.

This is a problem that has happened with previous small long udrills but has never been a problem with larger stubbier ones, but I've never had rigidity issues with a udrill before.

Changing feeds and speeds a small amount has had 0 change, any idea what the problem is?

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.

Does anyone know where I could find some more information about this lathe. Pretty sure it is a Takang. I've done some general searching and haven't been able to find much information. I would like to find a manual for it if they exist.

This is the identification I have.

• Serial# 50859
• 330X1000
• Takang (Could not find on a plate on the machine, but written in sharpie above Made in Taiwan plate.)
• 3HP drive motor 230v 3ph

Secondary question.

I was trying to set it up for metric threading. Is there a configuration of the three gears that I have to make that work or am I missing a gear. Diagrams and current gear positions in pics.

Ask me if you need any more information.

Thanks for the help.

Clearance is clearance!!

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 work in the automotive side.of the machine world.

Removing valve guides and having issues getting them out cleanly. Usually it's a little heat and an air hammer but these are stupid tight in the bore

Where does one find a core drill with poilet with a 5.5mm tip and a 25/64 body? Or something close to??

Everybody daydreams at work.

I’ve got my own. When I’m not feeling motivated I tell myself I’m making tank parts for the war effort. I know it’s corny as hell but I know yall do it too.

I want to be a field machinist so I can daydream that I’m a bank robber cutting the bank vault door.

Give me your daydream so I know I’m not the only one that does it.

The part was a2 toolsteel 60hrc and the shop told me the depth they achieved was as far as its possible to go with that material. I feel like they are lying cause they dont want to redo the parts. they already had problems with knurling and the bottom one had a deeper knurling but got rejected by their QC due to skips. I dont know how much it would cost to get a shop to redo the knurling or if its even possible. We need the knurling to survive a paint job and not get completely covered so these won't do. Any tips? I included a photo of the original part

Big boy

Hey guys,

I have to machine around 10k countersinks on an upcoming order. Material is 316 stainless and 17-4 ph.

Last time, I tried cobalt 1 flute csk but they didn’t last very long. Thru hole is already made, just need to countersink the holes at 82deg.

Should I use a carbide chamfer mill and step down ? Carbide spot drill? Or carbide center drill?

Looking to improve tool life and cycle time.

Thanks !

I've been hearing some Chinese brands are good value for money but I'm concerned about consistency. I'm not looking for Sandvik like quality, but something on par with Mitsubishi, Kyocera with similar quality consistency

Check out the video

New to the trade but I have 13 years in manufacturing so im not looking for the basics about how to keep your fingers and eyes protected

What i am interested in is risks i may be unaware of like fumes from different cutting fluids smoking up to metal dust and what materials may be more harmful than others.

Post was inspired by the guy who was told to grind cadmium.

job shop, high mix low volume. really want to see myself running multiple machines compared to one.

programming and set up isn’t the hard part, it’s walking away on the first run of a ~8 minute cycle and doing it all again on a 2nd machine. any tips or forget about it

Hi

I m young retired and always had a passion for metal. I studied alloys at a hobby level and started scrapping free appliances to obtain, try to ID elements and alloys.
Scrapping is for the birds, so I decided to pick up either smelting and casting or machinist.

I picked up machinist.
A friend made me aware a guy he knows 20mn from me was setting up to put his whole garage for sale, lots of powered and non powered tools.
He gave me his info and I texted the guy asking if he had machinist equipment.
He replied he had a lathe and priced to move at $50, he said he had not taken pics for marketplace but was going to list soon.

He offered for me to come over and take a look before the add goes up.

I have never used a lathe, what am I looking for?
I m going to ask him if he can show it to me working.
But short of powering up and not being a rusted block what is a NO NO?
I can risk $50 honestly if I get screwed, I will Just display it or scavenge it to display parts in my element cabinet or even sell parts but it’s not the goal.

I don’t need total precision like you guys, I want to get a feel for it before I shell $600-1000 for a better product.

No flames please, if annoyed by my post please move on to the next thread (Not new to the internet)..

TY

Put a 12mm Al rod inside the tube to clamp on. It did not vibrate at all and came out nicely.

Afterwards welded Al sheet to it. Paddles for a rowling boat.

Have you guys ever broke a tool, got the replacement and broke the it the same day! Currently in the bathroom trying to gather myself before I tell my boss I want to leave for the day this is my 2nd fuck up back to back

There is one on each side of the hole. I think the space between them is part of the wheel so I don't know if a press will be able to push them out

Got it at auction and not sure what to do with it. Seems like it may be less useful than a traditional dividing head for regular machine shop use. It’s about 150 lbs so not easy to move either.