View Full Version : large threaded cone .. puzzle?

08-17-2011, 03:24 PM
in my internet wanderings I came across a cone splitter video..
its basically a large threaded cone, a giant wood screw, used to
split wood.

here's an image:

don't really want to make one, but got me thinking.. how would one
go about making something like this?

I suppose one could cut a large thread with a taper attachment in

I don't have a taper attachment.


08-17-2011, 03:54 PM
You got it.
My guess would be a taper attachment.
Just like single-point cutting NPT threads.

08-17-2011, 04:02 PM
It can be done without a taper attachment. All you need is a threading die the right size.

Start at the wide end and when it gets to full depth index the cutter in and start again further down the cone.


08-17-2011, 04:27 PM
no need to make one ..

they are available cheap ..as a polishing mop arbor


all the best.markj

08-17-2011, 04:42 PM
Evan: niiiiiice!

Mark, good catch! but these things are usually bigger. 6" OD or so,
12" long? judging from the pics/vids.

but if i ever come across a stick i just gotta split... ;)

08-17-2011, 04:43 PM
Evan.. wait a minute.. you just pull a fast one? Wouldn't that cut
annular rings? and not a thread?

08-17-2011, 04:56 PM

Taper attachments are good for about 10 degrees max.

08-17-2011, 05:04 PM

I love the change in TPI near the tip. That just tickles my '... How the hell??'

08-17-2011, 05:55 PM
I used to make those tapered buffing arbors with threads as shown by aboard epsilon by using my manual tracing attachment while threading.

08-17-2011, 08:35 PM
Wouldn't that cut annular rings? and not a thread?
You still use the feed, same as you would for single pointing, but set the compound for the angle. Obviously you have to be careful to stop when the thread is at full depth.
Thread die inserts can be a time saver, leave a great finish, and as Evan shows, can be a real help in some tricky situations.

08-17-2011, 08:48 PM
Evan.. wait a minute.. you just pull a fast one? Wouldn't that cut
annular rings? and not a thread?

No, it's used exactly the same as single point threading except it insures that the threads bottoms overlap at full depth. You could use just two points to do it but then you would have to index down the cone one thread pitch at a time. Regardless, you only let it cut one full thread pitch and then reset to cut again deeper, same as regular threading.

08-17-2011, 09:20 PM
The cone was done with thread-milling on a mill ,doing that with the lathe will give you problems with the end climbing over the threading tool and braking of

done some before

08-17-2011, 09:56 PM
If i remember right that cone was called a "Stickler" or something like that.

Lots of ads for them back in the wood burning craze of the 70's-80's in mags like Mother Earth News etc.

You were supposed to jack up your'e vehicles one side and bolt it onto the wheel studs, put it in gear and Split Away.

Wonder how many got a broken arm or?? when the stop slipped and the block spun around wildly. (Maybe wiping out the rear fender?):D

These were in competion i gues with the "Stutz" "Monster Mall' That after 5 minutes only "Popeye" could keep swinging it.:D

Old Time
08-18-2011, 01:43 AM
In a former life I worked for a power equipment distributor, we sold the Stickler. All the dealers sold them like hot cakes. One dealer never sold any. after much asking it turned out he demonstrated it at a county fair, it was raining and he had on a long raincoat, unbuttoned. Also he didn't put the emergency stop button on the rear fender over the cone. In front of a huge crowd he got the rain coat caught in the cone, luckily one of the guys watching had sense enough to turn the key off on the pickup. Those things have a tendency to cull the herd, big time.

Old Time

08-18-2011, 03:17 PM
looks brilliant ...
not good for accident prone people

appears to be safe with auto transmission

would be a real pain with manual transmission ....i see now what you mean by the size of it .


all the best.markj

08-18-2011, 03:46 PM
Years ago you could buy these to mount on the back axle of your car or truck to split wood. I have not seen one for sale in 35 years. You jack up the back wheel and replace the tire with this gizmo thing. Start the engine put it is low gear and let it turn. Push a log up against it and it will split the log in just a few seconds. Make sure the axle is low enough to the ground that your log can not spin. I wonder how many people have gotten tangled in one of these and lost an arm or leg.

This is the log splitter I want. http://www.youtube.com/watch?v=hhmKBDIAXd0&feature=related

08-18-2011, 03:58 PM
If you disconnect the feed interlock that prevents you from engaging the carriage and cross feeds at the same time and install the correct gear ratio you are in business. You might get lucky and find the existing gear ratio is suitable.


08-18-2011, 05:04 PM
gary350: that one is truely awsome

as far as the stickler.. I can only imagen someone impailing there leg on it, and it only getting worse from there...

08-18-2011, 07:48 PM
Neat prossesor!!

About 30 years ago i was up to an old gas engine/steam show, and two local old lads were there, both close to 80.

They had built a prossesor just like that and were demonstrating it at the show. Built on a large wagon frame, it was i think ran with a small diesel, the elevator dumped the split wood into a 49-50 old chevy dump truck.

Very cobbled up of numerous parts sources, and un painted it was their Pride and joy!!

Jaakko Fagerlund
08-19-2011, 12:23 PM
One more option to make that tapered thread would be on a lathe that has power feed on the compound :)

08-19-2011, 01:16 PM
I actually got to wondering if someone didn't just hand whittle one of
these and use it to make castings.

Black Forest
08-19-2011, 05:38 PM
Those screw type wood splitters are still real popular here in Germany. They usually run off the PTO shaft of a tractor. I tried one last year. I didn't like it much. Ok for small wood but too slow.

Black Forest
08-19-2011, 05:42 PM
here is a video

Black Forest
08-19-2011, 05:46 PM
these guys are working too hard

08-19-2011, 08:08 PM
Just an accident waiting to happen!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

The horizontal hydraulic splitters i feel safe around,, those things are just too easy to get caught in.:eek:

08-19-2011, 09:14 PM
these guys are working too hard

Scary.. noticed several times where it could fall onto his foot (Minor ouch) and once or twice he puts his hands into the 'cracks' in the wood.. Only for said cracks to close up a few seconds later with what looks like great force.

Not to mention the smoke indicates a fire hazard...

08-19-2011, 09:42 PM
noticed in the one video, they both seem to get their glove quite close to the screw!!!!:eek:

08-19-2011, 09:48 PM
Ya - If that thing got hold of any part of you, you WOULD be screwed!:eek: I think I'm not using that kind - just too dangerous. Too slow anyway.

08-19-2011, 10:41 PM
On Ebay with free shipping! The real one & only Stickler! 140581221814 :D

08-20-2011, 12:31 AM
It can be done without a taper attachment. All you need is a threading die the right size.

Start at the wide end and when it gets to full depth index the cutter in and start again further down the cone.



I'm in the US. Where would I find threading dies? I typed in "threading dies and threading dies for lathes as well as threading die inserts" and come up mostly with how to thread on a lathe or helicoil inserts.

Thanks in advance.

Thomas Staubo
08-20-2011, 09:11 PM

"Die chaser" seems to find most items on ebay.
But "geometric die" or "coventry die" will also bring up some.


08-20-2011, 10:28 PM
In a news sideshow a few years ago the local channel showed a new firewood processor. It has anything shown here beat hands down. You would have a cylinder push a 20' log into the machine, 10 saws would come down and cut the log into pieces, then said cylinder would push all the chunks through the splitter. Do a whole log in about 10-15 seconds.