• Thanks for visiting The Penturners Forum today.

    There are many features and resources that currently you are unable to see or access, either because you're not yet registered, or if you're already registered, because you're not logged in.

    To gain full access to the forum, please log in or register now. Registration is completely free, it only takes a few seconds, and you can join our well established community of like-minded pen makers.

Worlds Oldest Pen

Penpal

Grand Master
Joined
May 26, 2013
Posts
25,342
Location
Canberra AUSTRALIA
First Name
Peter
Hooray for Johnny interesting pens your specialty,this one very interesting history.I am off again today making progress with my Rock Lathe so it is of special interest to me.

Thank you for your diversity in pens.

Peter.
 

johnny5

Registered
Joined
Oct 8, 2013
Posts
1,621
Location
Swansea
Amaxing! What is it like to turn Thomas?

Cutting & Drilling was fairly easy, used drum sander to get square edge , small hobby Jet bandsaw & 3/8 cobalt drill bit, Turning :thinks:
I decided to use abranet only as i did not want to get any blowouts using tools.
My decision worked out alright , took a little time but was worth it.
Nearly made the scirocco but blank was only 16mm and cobalt 3/8 worked fine for me. Did not have suitable cobalt drill bit and was close to diameter of blank.
 

Penpal

Grand Master
Joined
May 26, 2013
Posts
25,342
Location
Canberra AUSTRALIA
First Name
Peter
Thanks for the explanation the cutting and drilling I used for the Wooly Mammoth tooth I suspect a much harder stone. Cheap as chips to buy the stone from Michigan . Using an Artu bit sure works for initial drilling.I just read your explanation on the IAP. Once again really well done Johnny.

Peter.
 

johnny5

Registered
Joined
Oct 8, 2013
Posts
1,621
Location
Swansea
If you google turning petoskey stone it will give you a link to a woodturning forum which says

" Drill at very low speed using coolant and diamond tip drills. "
I made these two pens drilling at high speed , no coolant and using cobalt drill bit.
To finish the pen i used abranet only , no tools, just sanded it to size of pen.
I must have been lucky twice ?????
The quality of stone i had was a high calcium piece, this probably helped in the ease of drilling and sanding.
 

Penpal

Grand Master
Joined
May 26, 2013
Posts
25,342
Location
Canberra AUSTRALIA
First Name
Peter
As I was making progress with my rock I consulted with a local dealer expert who advised me to work dry. I drilled on the lathe using variable speed and the two jaw chuck from Timberbits,the molar had bands of silica that provided a challenge when drilling. With my proposed device in progress I intend to house it near the front door of my long workshop so I can open the door to use it with a strong fan to blow the fine dust away. It weighs heavily so i will ask my friendly Samoan giant to relocate for me,not enough moving room to use my engine lifter where it is in my metal lathe room. It is exciting to go where few have gone.Thanks for the reference.

Peter.
 

johnny5

Registered
Joined
Oct 8, 2013
Posts
1,621
Location
Swansea
I love trying different materials, it is a challenge.
I wish i had taken your advice regarding dust, i have 300 million year old dust up my nostrils that i have been blowing out all afternoon.
Hope there was no nasty bugs/ bacteria laying dormant in there .
My hair is stiff as i have been working in the dust for 3 hours .
But i am proud of what i have achieved,
Still have one more blank to use, unfortunately it split whilst cutting,
Just hope the epoxy resin will hold during drilling tomorrow ???
 
Warning! This thread has not had any replies for over a year. You are welcome to post a reply here, but it might be better to start a new thread (and maybe include a link to this one if you need to).
Top