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Something different! - A lathe powered scroll saw

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Project by MactheKnife posted 110 days ago 1907 views 10 times favorited 18 comments Add to Favorites Watch

Here is my latest project, its a Scroll Saw and its powered by my Lathe.

The design is inspired (ok copied!) from this one by Corydoras, after a lot of hunting around, but I never found another powered by a lathe.
http://lumberjocks.com/projects/74970

I wanted to take the drive for this from my lathe for several reasons, but mainly because its quiet!

Its mostly made from offcuts, the base is 60mm Beech Ply from my workbench build, the frame and arms are Ash and I used about an 1/8th of a sheet of 10mm Beech ply for the table and its support. The alignment bearings are mounted with Iroko and the lathe adaptor is an oak offcut. It has bearings in the rocker arms, drive link and lathe attachment, 14 in total (sounds excessive, but most are doubled up). The blade hangers are some old brackets I had which were modified with a hacksaw and a hammer to fit.

Blade changes are simple and require a few turns of a wing nut to complete. it will take standard length junior hacksaw blades or the larger scroll saw blades (fitted in the pictures). It runs on the lowest speed on my lathe and cuts brilliantly and is as quiet as I intended, probably because of the excessive amount of bearings! The lathe mount is the same as the one on the wall in the photos, which is my lathe mounted sander.

Total cost on this one was about £20, half on bearings and half on the 10mm beech ply. I haven’t done any sketchup drawings of it, but if anyone wants some I can do.

Here it is in motion:
http://www.youtube.com/watch?v=qi7_c4WKnwU&feature=youtu.be





18 comments so far

View Bsmoot's profile

Bsmoot

64 posts in 1441 days


#1 posted 110 days ago

That is so cool keep up the good work

-- Bryant north carolina

View bch's profile

bch

216 posts in 1189 days


#2 posted 109 days ago

I love it! I love “re-purposing” your lathe to make other tools. Great job.

-- --bch

View jim65's profile

jim65

315 posts in 433 days


#3 posted 109 days ago

That is an excellent project, very nice!

-- Jim, Marostica Italy

View Dutchy's profile

Dutchy

331 posts in 668 days


#4 posted 109 days ago

Great idea. Thank you for sharing. Nice build

-- My englisch is bad but how is your dutch?

View clieb91's profile

clieb91

3192 posts in 2434 days


#5 posted 109 days ago

A really neat idea. Great way to utilize the tools you already have and keep some costs down.
Looks like it works well, how is the cut on it?

CtL

-- Chris L. "Don't Dream it, Be it."- PortablePastimes.com (Purveyors of Portable Fun and Fidgets)

View kaerlighedsbamsen's profile

kaerlighedsbamsen

340 posts in 213 days


#6 posted 109 days ago

Wow thats clewer. Love home made machines!

-- "Do or Do not. There is no try." - Yoda

View HuckD's profile

HuckD

203 posts in 214 days


#7 posted 109 days ago

That’s thinking outside the box. Good job.

-- Time is what keeps everything from happening all at once.

View Underdog's profile

Underdog

424 posts in 535 days


#8 posted 109 days ago

Ingenious! I’m very impressed!

View MactheKnife's profile

MactheKnife

49 posts in 368 days


#9 posted 109 days ago

Thanks for all the comments.

clieb91 it does cut quite well, I have only used an old 15tpi blade in it and I was able to cut out jigsaw shapes easily. I used a temporary cutting table as a rest to cut the final top you see in the pictures. I’m still messing about with cutting speeds, its on its lowest setting now, but I have had it running much faster, just need to see how comfortable I am with it at higher speeds. I’m not used to scroll sawing so its a learning curve.

View stefang's profile

stefang

11812 posts in 1834 days


#10 posted 108 days ago

Looks like a great idea and nicely done too. It looks like you have a Record lathe like mine. The only negative for me would be the need to stand up while using it, but ok if you don’t mind standing.

-- Mike, an American living in Norway.

View Rick M.'s profile (online now)

Rick M.

3375 posts in 880 days


#11 posted 108 days ago

Very cool. The old Goodell Pratt lathes had a similar scroll saw attachment but it was quite small. They also had a tablesaw attachment that looks scary as hell.

-- |Statistics show that 100% of people bitten by a snake were close to it.|

View MactheKnife's profile

MactheKnife

49 posts in 368 days


#12 posted 108 days ago

Stefang, yes its a Record CL3 the cutting height is about elbow level for me when standing, which is my preference whilst I still can!

Rick, I saw an old Craftsman version of the Goodell Pratt attachments, that sowed the seed of the idea, although I agree the tablesaw attachments look downright dangerous.

View Rick M.'s profile (online now)

Rick M.

3375 posts in 880 days


#13 posted 107 days ago

I can’t quite make out the entire mechanism, so is the lathe spinning a cam that oscillates the cutting arms?

-- |Statistics show that 100% of people bitten by a snake were close to it.|

View MactheKnife's profile

MactheKnife

49 posts in 368 days


#14 posted 107 days ago

Rick, yes thats right, its essentially an offset crankshaft. The lathe chuck holds an oak disk about 2 inches thick. it has a hole drilled in it for an M8 bolt, that hole is offset from the centre about 1/2 inch. That sets the stroke lenght. I tried several off sets to get the stroke right. The M8 bolt is connected to the short arm that drives the cutting arms. the upstroke pulls the top arm down via the link at the rear, the down stroke pulls the top are down via the saw blade.

If you want to use longer saw blades you can use the wider offset at 3/4 inch which gives a longer stoke and slower cut.
I’ll try and take some pictures of it dismantled.

View customturnedwork's profile

customturnedwork

2 posts in 38 days


#15 posted 38 days ago

What size are the bearings? Are they bronze bearings or Ball bearings?
Could you send me the specifi cations and drawings/pictures of the Sketchup model?
Sketchup will not run on my computer so I can’t use the Sketchup file.

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