Contractor Talk - Professional Construction and Remodeling Forum banner

I made a linear rail "lathe"

5.2K views 43 replies 15 participants last post by  rrk  
#1 ·
Wanted to get someone with a lathe to do this work but the 2 guys I knew were 6 weeks out. I had some linear rails and pillow block bearings that I bought a while ago for a router duplicator and then I converted it into a slot maker for Euro cabinets and now I turned it into a lathe.

Made a video of me making a spindle. It's less than 8 minutes and it shows me going through the process of making a spindle for stair railings. Wish the camera was slightly more to the left. That's where the vice grips are that I use as a handle to spin the blank.

0-3:42 is putting the blank in and roughing it out
3:42-6:00 is readjusting the router setup and doing the final milling pass
6:00-end is sanding and removing the spindle.

 
#5 ·
Very nice, that's a slick setup. What kind of production do you think you'll do? Get it down to 5 minutes?
What are you using for the spur?
I doubt I'll get the time down any more. I did a few of them at about 7 minutes from inserting the blank to inserting the next blank but they needed more sanding. The extra minute is worth it.

I'm using a Kreg screw on one end to secure the blank and on the other end it's just a board with a square hole in it.

Image


Image
 
#8 ·
$400 and it's just barely big enough to do the job. The spindle blank I'm using is 33.25" and the max on the lathe is 33.375" and that's using a flat plate and a center. I'd still have to buy turning chisels and a much longer rest for the chisel. By the time I was done with it likely be $600.
 
#4 ·
If I'm getting a lathe I'd want something that's nice. Variable speed, couple HP, 16" turning and 42" length. But it's the first time in 20 years someone requested some kind of a turning, so I doubt I'm in the market for a real lathe.
 
#7 ·
You mean, and 35
Image
 
#12 ·
Took me under 2 hours to make my "lathe"
 
#18 ·
That's one of the nice things. Most of the time the top tenon is within 5 thou. I make sure it's a bit bigger and I can take my sander and roll the spindle on a surface while sanding it and bring it down to .75" +0/-.005
 
#20 ·
There are similar spindles. But the body lengths are wrong and the top is only 5/8" where these are 3/4"

Yes, tapered from 1 1/4" to 3/4" at the top. The will have a 3/4" round tenon on the bottom that is 1/2" long. I need to get all 70 made before that setup happens.
 
#25 ·
Having a hose attached to the router would just slow me down. Plus some of the stuff coming off isn't chips, it's chards of wood that would just clog it.
 
#30 ·
Lot of ingenuity there Leo!
It's either that or an attack of brain master-bat'n...

Maybe next time...
Use 5/8, or 3/4 roundover bit, & do taper side to side, instead of top to bottom?
The cuts would blend in nicely tjat way.
What do you mean side to side?
 
#31 ·
Pretty badass Leo.

Do tell where ya got the rails & bearings. I think that would work well for flattening a slab.
I've had them for a loooong time. This is the 3rd machine I've made from them. I made a router duplicator 1st, then that laid stagnant for quite some time after I did the 30 or so rosettes I needed to make (4 different kinds). Then a slotter for Euro cabinets and now this "lathe"

I think the place was called Specialty Motion Inc. But I've searched for them and don't think they're around anymore. Lots of places to get linear bearings and rails.
 
#32 ·
Finished up another 35 spindles and then put the tenon on the large end. Did it in a 2 step process because I don't trust doing it in one pass.

I did a setup on the tablesaw with some stops the put the spindle right where it needed to be both near the fence and at the edge of the tablesaw to keep the spindle square and level (because of the taper)

1st pass was just a thin kerf saw cut and the 2nd pass was with a dado blade. I did the saw cut to make a clean kerf and then the dado was kept away from the shoulder so it wouldn't chip out.


Image
 
#33 ·
A cool shot of the spindle in the middle of the cut

Image


Image
 
#38 ·
I think it'd be harder to do on a lathe. You'd have to think. This way the machine automatically spits out the right size.
 
#39 ·