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Treadle Lathe – Puppet / Tailstock

September 11, 2012 by Bob Easton 3 Comments

In yesteryear they called it a “puppet.” Today, we call it a tailstock. Same purpose, different names.

Earlier I mentioned that I’m aiming for a more modern interpretation. It is in jest that I forgo the old world costumes, and in practicality that I seek a smooth running contrivance.

a short digression … There was a time that I imagined having the “village blacksmith” fashion some parts for this lathe. A strange thing happened on the way to see the smith. I discovered he left long ago. The quaint little village I live in is intentionally quaint. I came here over 30 years ago as a convenient place to live while I pursued employment in the corporate, private, free-enterprise world. I didn’t move here because it is a quaint little village. Yet, about that time a town council was elected with the purpose of keeping the place little and quaint. There is no development here. No new people arrive (or are welcome) to help share a constantly increasing tax burden. Long story short, the smithie was one of the first to recognize the peril of perpetually increasing taxes and he left. Word has it he’s in Cody Wyoming where there’s plenty of smithing to be done and people who actually appreciate industrious private enterprise.

photo of puppet and parts

So, “here ya go, Shannon.” Shannon asked in a comment to a previous post about my intentions for the spinning parts. Let’s do the tailstock/puppet first. Many replicas of old time lathes want to use a large screw with a sharpened point as the tail center. I wanted a bit less drag and smoke! Live centers all seem to be attached to tapered fixtures. How would I support one of those? Some time ago, “TrialAndError” briefly mentioned using a “morse taper socket” in the lathe he built. It wasn’t until a week or so ago that I searched for such a thing on eBay and discovered they really exist.

photo of drilling the puppet

The morse taper socket I bought is simply a 1″ diameter chunk of stainless steel machined with a #2 morse taper hole, and then hardened. It is 4 inches long and includes a closed slot machined crosswise near one end. I assume this slot is used in applications where the socket moves within a quill.  Beware when buying this piece.

photo of completed puppet

You can find them in the $30-$50 range on eBay, or for $9.70 at Amazon. Shop around.

Drilling the 1″ hole through my puppet was a task best done on a saw bench. It is low enough to allow the right ergonomics of a very long auger in a hand brace. The short swing of the hand brace made for slow boring, but also made it easy to check constantly for accuracy.

The result is a very tight fit, requiring a block of wood and rubber faced mallet to drive the socket into the puppet. If, I find it moves under turning pressure, I’ll add a pin through that slot.

UPDATE: After using this for a couple of years, there was no movement of the socket. A pin through that slot isn’t needed at all. However, I did modify the socket by drilling a 1/4″ hole through the closed end. I can insert a bolt in that hole to knock the tapered center out. It’s a good practice to knock that center out and not leave it in the socket when not in use. (DAHIKT)

Filed Under: Shopmade, treadle lathe

Treadle Lathe – Parts

September 11, 2012 by Bob Easton 4 Comments

These are the parts not commonly found at your nearby home centers. We’ll see more of them in subsequent posts.

photo of 5 parts

Some of these are available from several sources. I include links in the “Source” column for where I found the ones I’m using. Shop around. For example, that MT socket is listed by several sellers on eBay for $30-50, and I found it at Amazon for less than $10

Description Part number Source (mouse over for links)
1/2″ sealed bearing KIT7478 – R8-2RS vxb.com
5/8″ sealed bearing KIT7886 – 1623-2RS vxb.com
51102 thust bearing – 15x28x9mm KIT7853 – 51102 vxb.com
#2 Morse Taper Socket SSH-4 2 Morse Taper – 1″ Hard Solid Socket Victor Machinery Exchange, via Amazon
Drive spur – 5/8″ spindle Shopsmith Drive Spur eBay – bandsaw-tire-warehouse
Live center – #2MT Shopsmith Live Center eBay – bandsaw-tire-warehouse
Headstock Adapter – 5/8″ to 1″ 8tpi PSI L5818 Headstock Spindle Adapter Amazon
Live center – #2MT PSI LCENTLT2 No. 2MT Heavy Duty Live Center Amazon
Drive belt – 2 strips of 2″ by 72″ leather 4773-00 Latigo strips Tandy Leather Factory

 

Filed Under: Shopmade, treadle lathe

Treadle Lathe – Bearing Blocks

September 9, 2012 by Bob Easton 3 Comments

Other people who have added modern bearings to their wooden treadle lathes report the bearings eventually moving around and becoming wobbly.

photo of bearing blocks and some tools

The solution is housing the bearing in something harder than the typical softwood we use for the lathe frames. Let’s see now… oak, ash, … ah, there’s some walnut left from a gun stock project. There’s enough walnut for the bearing blocks and for a few other small parts. Perfect.

There are a total of 4 bearings, two 1/2″ for the flywheel and two 5/8″ for the headstock. One of the 5/8″ bearings is a thrust bearing that will absorb the headstock’s lateral movement. They have outside diameters of 1 and 1/8″ and 1 and 3/8″. Forstner bits in a hand brace do the job. I drilled several holes through a block that’s a bit more than twice as thick as the bearings. Then, I sliced the block into the correct thickness. It’s a simple resawing task, but the work pieces were too small to handle well for manual resawing. So, I relented to using the band saw. After that, saw to size with a Japanese pull saw. Yes, I’m leaving them square. It’s easier than making them round.

By the way, I can’t say enough good things about my Czeck Edge marking knife. It’s really hard to mark dark woods for sawing. Pencil lines disappear. Pen lines are too fat. The marking knife makes perfect lines that are both precise and very visible.

P.S. I’ll be remaking the block for the thrust bearing. I’ve decided to double up on that one by placing the thrust bearing and a regular bearing sandwiched together. It’s a simple matter of more boring boring.

Filed Under: Shopmade, treadle lathe

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