Todays Project - What did you do today?

[Roadracer_Al]

Yeah, I've never been real impressed with brazed carbide. I do keep a box of brazed bits on hand in case I need to do something special in hard material, such as a form tool.

They usually seem to not have enough or sometimes any front or side rake from the factory and need to be modified to work. Of course, you need the correct (expensive) wheel on your grinder (or better yet a dedicated grinder), and said expensive wheel doesn't like steel, so you have to have a second wheel to dress the supporting tool shank back before you can do anything to the carbide... sigh.

Now... inserted carbide, that's a whole other kettle of fish. That technology usually has correct tip radii, front & side rake, and well-functioning chip breakers formed right into the insert. Good living.

[Sunset Machine]

I bit the bullet yesterday on a boring bar. A whopping $28. The bit is sharp, acts just like HSS at the mill's maximum speed of 300 RPM. An extra bit is dull, it must put the shine on?  Both CCMT I think. Mini. I even ordered another one to cut back into a shorty. Threaders at $132 is too much though, when old trusty works just fine.

[Roadracer_Al]

You ought not need to do anything to inserts to make them cut. One of the attractions.

[pepi]

(02-23-2016, 06:56 PM)Vinny Wrote: Here ya go Mayhem!



I have a hole to drill and tap for the RT project so we'll see how well it works.

Vinny,
Making good use of the light, are you able to see the work area better?

[Vinny]

Yep. The chuck was in the way there and casted shadows. It's very rarely on the mill, I had some drilling to do so it was in. I took another pic but haven't processed it yet for upload, I'll let ya know when I do. It's finished up now, the DC jacks showed up. Now it looks like I can get rid of the desk lamp I have c-clamped to the mill's table!

[pepi]

Nice it is a clean mod and install the way you did it .

[Sunset Machine]

(03-01-2016, 09:32 PM)Roadracer_Al Wrote: You ought not need to do anything to inserts to make them cut.  One of the attractions.

It's a far cry from my old habits - I've been blacksmithing the old HSS bars. They just got too nubby. And I just took a look at my threader and decided it was time for that to go too, so a new one is forthcoming. It'll be a bar with a round hole for a square bit. Nice SS bar from a washing machine, sooo pretty.

[Old Minger]

Evening Gents!

This is a worm shaft from a Yuasa 550 - 050 rotary table. As you can see its not as straight as it should be!   

Do you think it will straighten out with some serious heat and muscle, or should I just try and source a replacement part? According to the manual it is hardened and ground. Also I cant disassemble it any further because of the bend in the shaft.

Thoughts please.

Thanks in advance.

John

[attachment=12890]


[attachment=12891]

[Mayhem]

I had a similar issue with the knee crank on my mill. I drilled a hole in a length of solid bar the same dimensions and bent it back into alignment.

[awemawson]

It is probably case hardened so the core is still soft. Try bending it back, after all, you are no worse off if it breaks than you are now.