Instructables

Router Jig for flutes on Wood Lathe

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Picture of Router Jig for flutes on Wood Lathe
column turning.JPG
Flutes are cool little grooves that run parallel to a turned object's long axis. Lots of people do em by hand, or have specialized machines/jigs to help them do them.

I made a quick jig to run flutes along some cool little muddlers I had turned. 
 
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Step 1: Build the sliding base

Picture of Build the sliding base
The lathe at techshop has a handy gap that runs along its bed for the tool rest to slide along. I used this gap to put a guide on and keep my jig from tipping over. 

One piece of wood, cut exactly the width of the gap (2.5") and 6 inches wide forms the guide. Another piece, slightly larger (3"), goes underneath the bed and keeps the jig from tipping over or sliding out.

The gap was 1.5" deep, so I made another piece 2.5" wide, and slid it in between the two. However, it needed some sanding down to keep the slide flush with the top of the lathe bed. 

Two pieces of threaded rod slid through all three pieces are for tightening your jig down. (with a nut on the backside or glued to the 3 pieces)

This whole slab slides up underneath the lathe bed and fastens to your jig

Step 2: Adjustable base

Picture of Adjustable base
The dimensions for your base are up to you, just figure how much adjustment you want for your jig.

If all your pieces are a similar size, you wont need nearly this much adjustment, or this large of a base. The rotating section is completely unnecessary, but it does add a little more flexibility for doing interesting pieces.

Mine is 6" wide, and 12" long. I cut it out with the CNC Shopbot at TechShop to make sure the grooves and the arc for rotating were cut perfect. You can probably do it fairly easily with a router though. 

Bolt it all together with some wingnuts, and you can fasten the whole piece to your slide. 
tstan1136 (author) 10 months ago
It is, the shopbot just didnt cut all the way through and i had to chisel out a small fragment hanging on. The picture shows before I went through and cleaned out that slot.

Either way, it's still waaayyy more adjustability than I ended up needing anyways, as I always use the router the exact same height as the lathe turning axis.
astral_mage10 months ago
umm if u look at the slot of thre picture on the left one of the slots isnt like the other
audreyobscura10 months ago
Such a great idea - I dont think ive ever used a lathe as part of a jig before! Smart!