Tapping 10-24 in blind hole SS 304

[Cr23484]

Congratulations C

Here is even more fun one 2-56 tap, 304 SS, 0.200'' deep, #49 (0.073'') drill, blind hole. 4 holes required. Made it through 8 holes (2 parts) without breaking the tap. Power tapped in the Haas. Just did these about an hour ago.

Sorry, I can't show the part.

View attachment 288527

View attachment 288524


View attachment 288530


View attachment 288526

Tapping speed 10 rpm

And a bonus, 3/64 (0.047'') end mill in 304 stainless in an ER 32 collet. We were out of the ER 11 Holders. The coolant stream dwarfs the endmill
View attachment 288528

Wow, that is amazing! Machine taps look very cool!
Thank you for the congrats Jim!
C

 

[Liljoebrshooter]

Beautiful work!
Are those single point cutters?
What are they used for?
Thank you

They are telescoping stands for wind flags I use for benchrest shooting

 

[Cr23484]

They are telescoping stands for wView attachment 288548View attachment 288549ind flags I use for benchrest shooting

Very cool!
Thanks
C

 

[stupoty]

I am using olive oil , is there a non-toxic tapping lube or paste?
Thanks
C

I have used vegetable oil as a cutting lube , be careful about mess it can set like a rock

Stu

 

[stupoty]

I am using olive oil , is there a non-toxic tapping lube or paste?
Thanks
C

This is what I use by the way, apparently it is approved for use on water pipes.

Thread Cutting Oil | RIDGID Tools

For use with Steel and Stainless Steel, Low odour, Anti-Mist, Free from Chlorine, Silicon and PCB's, Performs to -18˚C, Water washable, Available in spray cans.

www.ridgid.eu

Stu

 

[rwm]

Tangentially, I have been using "machine" taps in my Lassy hand tapper and on the lathe with good results. They seem to clear the chips better. Is there a reason these are called machine taps and is there I reason I cannot use them with good alignment by the lathe etc?
Robert

 

[Cr23484]

This is what I use by the way, apparently it is approved for use on water pipes.

Thread Cutting Oil | RIDGID Tools

For use with Steel and Stainless Steel, Low odour, Anti-Mist, Free from Chlorine, Silicon and PCB's, Performs to -18˚C, Water washable, Available in spray cans.

www.ridgid.eu

Stu

Thanks Stu

 

[mmcmdl]

Tangentially, I have been using "machine" taps in my Lassy hand tapper and on the lathe with good results. They seem to clear the chips better. Is there a reason these are called machine taps and is there I reason I cannot use them with good alignment by the lathe etc?

There are machine taps . Expensive . HSS . All kinds of different grinds for various materials and applications . Gun , plug , bottoming , spiral , exo , coated , non-coated , the list is endless . You can use these most anywhere in the correct application .

There are " maintenance taps " . Cheap . Sold in hardware stores , the Repot , Lowes etc . Used mostly for reforming a damaged thread . High carbon , NOT HSS . They do cut a thread but not very good . They dull very easily . You will not tap or re-tap a thread in a hardened part . It will sieze and break . Specifically sold to " home makers " not wanting to shell out $30 for a 1/4-20 tap .

 

[JimDawson]

Tangentially, I have been using "machine" taps in my Lassy hand tapper and on the lathe with good results. They seem to clear the chips better. Is there a reason these are called machine taps and is there I reason I cannot use them with good alignment by the lathe etc?
Robert

No reason at all. But you do have to use the right tap for the job. As Dave says above, there are many different styles of good taps, none of them sold at the big box store.

Specifically sold to " home makers " not wanting to shell out $30 for a 1/4-20 tap .

You're buying at the wrong place, I only pay about $15 for a 1/4-20, but that 2-56 tap was $26

 

[mmcmdl]

My account is from MSC or Grainger , neither are cheap !