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What's Paul up to?

I've been doing more work on the bandsaw. Now that I have a 5HP motor, I needed a pulley.
Fortunately I had this bar of 6061 hanging around that I picked upon speculation some time ago:
1746377958259.png

Then a 4-jaw face-off:
1746378000642.png

And before losing my starting faces, which are square enough for my purposes, I dropped in a set of tapped holes to drop some square-ended set screws to engage the keyway in the motor shaft.
1746378104159.png

I added some indexing faces so I could drop the pulley on a set of narrow parallels in a vice. These are exactly opposite and perpendicular to the tapped holes in case I decide I want to remachine the holes or set it up in a shaper for a real keyway.
1746378268833.png

For now this will do to get a belt length measurement off to Jack Forsberg to make me up a flat belt. I'll post some pics of the final setup when I get the saw going!
1746378411143.png
 
David said:
That must have been a heck of an interrupted cut!
Click to expand...
That was the least pleasant hour of the project. Whup whup whup whup...clench clench clench clench
Removing the 1/2" I left on to hold it was similarly annoying, though with more experience it was less terrible.
I forgot to mention that the pulley is getting some belting spray-adhesived on as a tire, so I'll be adding the slight crown with a strip of tape under the belt.
 
I think you could crown the wheel with a 1º cut on about a 1/3 of both sides then smooth it in with sand paper. I've done that with a wheel which turned a belt.
 
Janger said:
I think you could crown the wheel with a 1º cut on about a 1/3 of both sides then smooth it in with sand paper. I've done that with a wheel which turned a belt.
Click to expand...
Yes, I certainly could. But as it's getting a tire it seems easier to dress the tire. Or just throw a thin line of tape down the middle before gluing on the tire.
And if it doesn't work? Put it back on the lathe and crown it!
 
PaulL said:
Travis at Wroughten Art dropped off a laser cut package for me a little bit ago:
View attachment 62478
My welds putting it together are embarassing, but adequately structural. The design is nice - all the tabs have little cut-aways, so your welds are automatically recessed. You know, except for those I *really* screwed the pooch on. Hope to get some legs on it tomorrow or Tuesday.

Paul
Click to expand...
Just look at those laser cut parts! WOW. The hell with a plasma cnc I know what I want now. How many watts do you need to cut 12mm steel? is that 12mm? and it's not just some hot rolled mild steel. What is material? is it treated?
 
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Janger said:
Just look at those laser cut parts! WOW. The hell with a plasma cnc I know what I want now. How many watts do you need to cut 12mm steel? is that 12mm? and it's not just some hot rolled mild steel. What is material? is it treated?
Click to expand...
This one is only 1/4" - for my use that's adequate. It's Hot Rolled Pickled and Oiled (HRPO) steel.
He does offer them in up to 1/2".
Serious power for the laser, I'm sure.
Paul
 
PaulL said:
For now this will do to get a belt length measurement off to Jack Forsberg to make me up a flat belt.
Click to expand...
Just a tip...lots of pieces of old round baler flat belts laying around farms now that can be used for short "new flat drive" belts. Susq or one of his neighbors could have a suitable piece laying around. The alligator jaw joining clips can be had at any farm supply.

used a piece to build a new belt for my Hendey Lathe, any length or width you desire, easily cuts to width in a wood bandsaw
 
historicalarms said:
Just a tip...lots of pieces of old round baler flat belts laying around farms now that can be used for short "new flat drive" belts. Susq or one of his neighbors could have a suitable piece laying around. The alligator jaw joining clips can be had at any farm supply.

used a piece to build a new belt for my Hendey Lathe, any length or width you desire, easily cuts to width in a wood bandsaw
Click to expand...
I'm far enough from farm country to make this harder than it might look!
I don't mind sending some business Jack's way. I enjoy his woodworking machinery videos, and he's been plenty generous in time and advice getting a decent drive on my bandsaw. And I'm not particularly financially constrained at this level, so I'll spread it around a bit.
 
PaulL said:
I'm far enough from farm country to make this harder than it might look!
I don't mind sending some business Jack's way. I enjoy his woodworking machinery videos, and he's been plenty generous in time and advice getting a decent drive on my bandsaw. And I'm not particularly financially constrained at this level, so I'll spread it around a bit.
Click to expand...
You might talk to the Saanich Historical Society to see where they get their flat belts.
 
David said:
You might talk to the Saanich Historical Society to see where they get their flat belts.
Click to expand...
I've been meaning to visit there for some time (oh...going on 25 years now), and they are open since May 1! Well, time to drop by on my next trip back to town.
 
Nothing much in the shop as I've been in the UK for a conference.
But by coincidence, my hotel is just off of Southwark Street.
And it made me look up my bandsaw...
37c0789e-5aa7-41d4-ad2c-0006dbf834f0~1.jpg
The F.W. Reynolds company has their address at 73 Southwark Street. My hotel is literally 3 doors down from the Hotel Mercure that now occupies the old foundry.
1000004887.jpg

Not much trace of its industrial history however.
 
I got to spend some time at the Musée des Arts et Métiers in Paris yesterday. This place is *full* of fascinating historical artifacts. From Pascal's mechanical calculators, Blériot's plane that he used for the first crossing of the english channel, a Cray-2 supercomputer, and so much more.
And near the end there is a gallery on the "mechanic's tools". Oh my.
Vaucanson's sliding carriage lathe is there:
1748156433642.png

It is brutally hard to photograph it through the glass case. I'll make a few observations though:
The thing is beefy - it doesn't look it in most photographs as they are devoid of scale. The cylinders it turns must be nearly 4' in length and 12" in diameter - this thing is bigger than my 12x36 lathe in overall dimensions. The frame members are easily 8cm square in section.
The carriage runs on prismatic ways. The lead screw is crank-operated from either end of the bed.
The "cross slide" advances the tool directly, on a thumb-screw.
The work is held between centers, and the positions of the centers are adjusted to bring the work square to the carriage:
1748156679496.png

The slots clamp the "centers" carriage.' There is a screw below to adjust the height of the center in its sled. The centers are moved in and out with lock nuts. The work is direct-driven, like on a pole lathe, with a rope around the work; there's a moveable support slot to keep it tracking.

This machine was made to make precision rollers to crush velvet; I don't know if the rollers were engraved after turning to produce further patterns than just the crush, and there are no examples of rollers on display.
 
Not far from Vaucanson's lathe is this monster engraving whee by Jesse Ramsden, 1766:
1748163577493.png

About a meter in diameter it's set up to make radial marks on a blank centered in the jig. The steel ring on the outside has fine graduations all around, and two microscopes to view the markings with - it looks like a vernier setup. There's a detent and coarse adustment to rotate the whole platten, and a fine adjustment knob and worm gear to fine-tune while using the microscopes.
I'm sure it was of great use in marking circular scales on all sorts of instruments.
 
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