Thread: Bottoming/Plug Taps

Originally Posted by Anorak Bob

Hi Matt,

It is a little Sherline chuck. It's threaded 3/4" x 16. I turned up a 2 Morse arbor to suit to which I can fit a 3M sleeve enabling its use in the Hercus headstock. It has proved to be extremely handy over the years. Even used it in the Vertex rotary table for milling stuff in my height deficient Hercus mill.

Sherline 1041 - 3 Jaw Self Centering Chuck [3/4 - 16] ...NEW | eBay

Bruce liked mine enough to buy one of his own. Bit of luck he might let us know where he bought it.

Their 4 jaws look neat too.

BT

Just happened to notice the mention of the Sherline Chuck.
Yes, I got the idea of the chuck from Bob.
Its a little beauty!
Used it only yesterday, however have found it a very useful piece of equipment.
I use mine primarily in a Hercus Indexing fixture, the fixture has an internal 3 Morse Taper.
So when I ordered my chuck I purchased it with a rear internal thread of 14mm by1mm to accept a
3 Morse taper male piece which was threaded to 14mm -1mm ( this was a piece I already had )
To ensure it does not come off when machining with milling cutters etc I put a drop of loctite on the threads & also made up a draw bar to hold it in the fixture.
Purchased it direct from the USA mine is a part 1031 2.5" OD threaded 14mm 1mm
Contact is....Bruce's Projects 584.jpg [email protected]

regards
Bruce

Originally Posted by Anorak Bob

Hi Matt,

It is a little Sherline chuck. It's threaded 3/4" x 16. I turned up a 2 Morse arbor to suit to which I can fit a 3M sleeve enabling its use in the Hercus headstock. It has proved to be extremely handy over the years. Even used it in the Vertex rotary table for milling stuff in my height deficient Hercus mill.

Sherline 1041 - 3 Jaw Self Centering Chuck [3/4 - 16] ...NEW | eBay

Bruce liked mine enough to buy one of his own. Bit of luck he might let us know where he bought it.
I
Their 4 jaws look neat too.

BT

Thanks for that BT,
I have an old 2" Pratt Bernard 4 jaw chuck I bought by
Accident on Ebay that I have just found a use for thanks to
you fellas.
I bought it in its last few seconds thinking it was a 200mm
chuck as the seller had one listed as well, turned out I was in
such a hurry I hit the wrong one.lol
This little 4 jaw looks like it has never been used, so my thoughts
are a setup like yours but I might make it a live chuck.
Again thanks for that.
Matt

Originally Posted by Stustoys

Thanks, it could be 8BA.

Fired up the comparator and came up with 48.5 degrees.

Just so we dont think its only the Chinese that stuff up, here is a blade from my Moore and Wright thread gauge.

Maybe its me! lol

Stuart

I'm thinking BA as well. This chart is from an old Blackwoods catalogue - it may be of interest. I think Sutton tools do (or did) a large thread chart too.

Michael

Scan.jpg

Stu,

If you think that an 8BA die would help you out, I'll send you one with the Eclipse "upgrade".

I have to ask. What are you trying to fix?

BT

ps. That thread gauge looks like a poor attempt at saw sharpening.

Hi Michael,
Thats the sort of thing I was thinking about.
Something that lists most of the common threads by Dia the pitch/tpi.
maybe there are to many to make it much use?

Hi Bob,
I'll try cutting an 8BA tomorrow and see how it goes.
I'm making a special tip for a dial gauge.
Would you believe I have two rolls of tracing paper(though I'm not sure thats really its name) in the shed. Couldnt find it and had to use baking paper on the comparator! lol

Stuart

p.s. Yes, it wasnt their best work.

Originally Posted by Stustoys

Fired up the comparator and came up with 48.5 degrees.

Just so we dont think its only the Chinese that stuff up, here is a blade from my Moore and Wright thread gauge.

Maybe its me! lol

Stuart

Have you got a tap and die to match that thread profile?

Dean

Had need of a 10 x 1.25 mm tap today and as usual I have everything except that pitch.

Fairly common small engine crankshaft nut size/pitch, but I seem to be without.

Priced HSS jobs at Gasweld and nearly had a heart attack.

So doing the job another way, BUT bought these cheapies off Ebay - slow boat from China I expect.

eBay Australia: Buy new & used fashion, electronics & home d

Let you know how they turn out

Cheers

Rob