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Help choosing tool to turn V-groove

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Forum topic by 84Lumber posted 01-22-2017 02:42 PM 484 views 0 times favorited 6 replies Add to Favorites Watch
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84Lumber

7 posts in 1004 days


01-22-2017 02:42 PM

I’m absolutely new to wood turning and need to turn a v-groove in a plywood disc to fit a standard v-belt to drive a few pulleys. Looking for some suggestions as for the type of tool to use. Thanks


6 replies so far

View WhyMe's profile

WhyMe

909 posts in 1394 days


#1 posted 01-22-2017 03:48 PM

I’d probably use a carbide tip diamond shaped cutter.

View jfoobar's profile

jfoobar

44 posts in 1164 days


#2 posted 01-22-2017 06:27 PM

The D-Way “tear drop” tool is also something to consider:

http://d-waytools.com/beading-tools/diamond-tool-aka-tear-drop-tool-shaft-size-390/

It will also probably create cleaner grooves than a carbide tool due to the cutting angle, especially in wood as inherently chippy as plywood.

View Rick_M's profile

Rick_M

10599 posts in 2213 days


#3 posted 01-22-2017 09:39 PM

V-belt grooves are actually trapezoids. Skew, parting tool, diamond carbide, small spindle gouge, all will do it. Parting tool is probably easiest for a beginner. Be careful with diamond carbides, if you catch those back points it can be nasty, enough to ruin your workpiece.

-- http://thewoodknack.blogspot.com/

View MrUnix's profile

MrUnix

5973 posts in 2032 days


#4 posted 01-22-2017 09:58 PM

Rick is right, you can use just about anything. If you want easier repeatability, find a nice old large screwdriver and grind the profile needed. Basically just a flat, sharpened tip and sides at 40 degrees. Put a mark on it at the depth you want to use. 5/16” would be the absolute minimum.

Cheers,
Brad

PS: If you don’t already have a lot of old unused screwdrivers laying around, you can pick them up for pennies at almost any garage sale. They are great for making odd-ball profiles that aren’t really suitable to more standard grinds, or even for more standard ones to supplement you existing tools.

-- Brad in FL - In Dog I trust... everything else is questionable

View jomamma1's profile

jomamma1

4 posts in 306 days


#5 posted 02-08-2017 06:04 PM

It is probably too late (I just joined yesterday), but I have made pulleys from plywood on my table saw. I used to pieces of plywood, made circles of the desired diameter, then cut a bevel on the tablesaw. You can set the blade to the desired angle, then just glue the two pieces together. You may want to mount on lathe afterwords to clean up a little. Just sayin’.
Joe in Modesto

-- Joe in Modesto

View Leo Van Der Loo's profile

Leo Van Der Loo

45 posts in 591 days


#6 posted 02-08-2017 06:59 PM

Plywood pulleys work just fine, but there is a problem with that if the pulleys are smaller, unless you reinforce the plywood so that it can’t split, screws and metal plate/washer to keep it together is needed.

And yes use whatever tool that can make the slanted groove, not critical.

This is what happened with this step pulley someone made.

-- Have fun and take care

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