Help required identifying taper

[RobWard]

Could someone please help me identifying a taper:

Small diameter: 0.430"
Large diameter: 0.465"
Length: 0.55"



I have googled and searched this site but all to no avail.
The taper is on an air-powered tapper and I'm trying to get a replacement chuck. (Possibly Ingersol-Rand, but it's so old there are no markings on it. The old chuck was Swedish : Maskin AB, but I cannot find any information about it on the internet either.

Any help would be appreciated.

Rob

"I love deadlines. I love the whooshing noise they make as they go past." Douglas Adams

 

[metman]

Taper per side is 1.822 degrees or the included angle is 3.645 degrees. This is not much help unless you are making the taper yourself because tapers are usually expressed in taper per inch or taper per foot.

In this case it is .063636... inches/inch=(.063636...mm/mm). Unfortunately this does not compare closely with any standard taper listed in Machinery's Handbook. It might be a special taper in which case you might have to make it or have it made special. Another possibility is that your measurement is inaccurate.

 

[RobWard]

Thank you for trying.

The measurements are probably not too accurate, but close enough that the taper seems like no standard one, at least that I can find.

Oh well, guess it's time to crank up the lathe!

Thanks again, metman.

Rob

"I love deadlines. I love the whooshing noise they make as they go past." Douglas Adams

 

[pvdvyve]

Hi,
I also took a look and didn't find anything to come near the dimensions you gave.

Think you will have to make it yourself.

Mention that the Swedish word "MASKIN" means machine in English.

Greetings from Belgium, Europe.

 

[bobc]

i could be wrong, but this looks like a old common metric spec. taper 1:10. this is an old taper and may not be in use today. it was found on shanks for lathe centers and self holding drills and reamers.

respectfully,
bob c.

 

[vzeos]

For what it's worth...the #33 Jacobs taper has a single angle of 1.818 deg.

http://www3.telus.net/public/aschoepp/tapers.html

 

[RobWard]

Thanks guys.
The parts are still on my desk waiting for me to sort this out. (Hangs head in shame and mutters something about being really busy...)

Actually, I've decided to keep the old taped and adapt the old holder to take a new chuck.
It'll look odd, but be easier to machine. When I get around to it...

rob

"I love deadlines. I love the whooshing noise they make as they go past." Douglas Adams

 

[Heckler]

Here are some tapers as listed in the Machinerys handbook

Morse Taper
Brown & Sharp Taper
Jarno Taper
American National Standard Machine Taper


Do a google search on these tapers for more information or look in the machinerys handbook