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Forum topic by Karda posted 06-19-2017 02:46 AM 945 views 0 times favorited 30 replies Add to Favorites Watch
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Karda

716 posts in 337 days


06-19-2017 02:46 AM

I want to make a carbide turning tool for the bottom of bowls, I was told i need a round cutter. I have been looking and it seems they are all different, I was also looking for information on how to use carbide tools and other that some utbes with them being used i have not been able to learn about them, do you have any source suggestions;
’ I can’t find square stock for the cutter bar can i use round, Thanks Mike


30 replies so far

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papadan

3584 posts in 3152 days


#1 posted 06-19-2017 02:53 AM

Check auto supply stores for Key stock, a 3/8” stick should do nicely for your tool. You can buy replacement cutters and mounting screws from Rockler or Woodcraft so you get the right size and type.

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Rick_M

10291 posts in 2164 days


#2 posted 06-19-2017 03:09 AM

I give AZcarbide.com my highest recommendation, although it is under new ownership but under the previous owner the service and prices were terrific. Use square bar. You could use round bar for round cutters, but definitely use square for any other shape.

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

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Karda

716 posts in 337 days


#3 posted 06-19-2017 04:44 AM

thanks, I have seen sizes from 12 to 16 MM what is right, I want a tool big enough for the job. also I have seen and inch size reference to the cutter what does that mean

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papadan

3584 posts in 3152 days


#4 posted 06-19-2017 05:12 AM



thanks, I have seen sizes from 12 to 16 MM what is right, I want a tool big enough for the job. also I have seen and inch size reference to the cutter what does that mean

- Karda


What is right is up to you, and what an SAE size reference means is that they are an SAE size instead of metric.

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Karda

716 posts in 337 days


#5 posted 06-19-2017 05:42 AM

ok thanks

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LeeMills

438 posts in 1085 days


#6 posted 06-19-2017 12:18 PM

If you can’t find it locally there are tons of folks on ebay and Amazon with square or round stock. This would be $17.50 for 5 including shipping.
http://www.ebay.com/itm/A36-Hot-Rolled-Steel-1-2-SQUARE-BAR-12-long-5-PIECES-for-blacksmith-farrier-/262950448859?hash=item3d39116edb:g:JW8AAOSw9N1VnuAs

I would go with square stock the exception being if the round cutter is “cupped” you would want round because it must be presented at an angle. John Lucas has a couple of videos on you tube using the cupped round cutter (john60lucas). I would stay with the flat cutter to start with.

Another + for AZ carbide. They have the round cutters in both the flat and cupped style and can tell you what size screw you will need.

-- We cannot solve our problems with the same thinking we used when we created them. Albert Einstein

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papadan

3584 posts in 3152 days


#7 posted 06-19-2017 06:01 PM

1/2” is really to big for a normal tool shaft, 3/8 would work better with less work to make the tools. A standard size cutter is .60” or 16 mm. If the shaft was 1/2” the cutter would barley be bigger. Key stock from an auto supply works great and you can get round stock at Home depot or Lowes fairly cheap in 36” lengths.

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Karda

716 posts in 337 days


#8 posted 06-19-2017 08:59 PM

ok, I check the auto store, but I may be able to get 3/8 any where the half and larger is more limited. I’‘ll go with 3/8s and 16mm cutter thanks Mike

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Karda

716 posts in 337 days


#9 posted 06-23-2017 10:21 PM

ok, found the square stock and shaped the tip, screwed on the cutter and can’t get it tight. I remembered I read some where that you have to drill out the entrance of the threads to allow clearance for the screw. what size drill do you use I drilled the hole to be taped at #29 thanks Mike

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papadan

3584 posts in 3152 days


#10 posted 06-23-2017 10:35 PM

What kind of screw are you using?

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Karda

716 posts in 337 days


#11 posted 06-24-2017 12:15 AM

the screw that came with the cutter, 8-32 flat head with allen recess

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Nubsnstubs

1184 posts in 1514 days


#12 posted 06-24-2017 12:30 AM

Use a countersink. Drill down no more than 1/8” deep….... Jerry (in Tucson)

-- Jerry (in Tucson) www.woodturnerstools.com

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papadan

3584 posts in 3152 days


#13 posted 06-24-2017 12:33 AM

If you don’t have a counter sink, use about a 3/16” bit and drill just a couple threads deep. That should take care of the problem

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Karda

716 posts in 337 days


#14 posted 06-24-2017 12:46 AM

ok, I finish sanded the bowl, it looks realy nice

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papadan

3584 posts in 3152 days


#15 posted 06-24-2017 12:48 AM



ok, I finish sanded the bowl, it looks realy nice

- Karda


But what about the tool? Get it fixed?

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