Tapered ball nose bit - Router Forums
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post #1 of 17 (permalink) Old 05-21-2019, 04:09 PM Thread Starter
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Default Tapered ball nose bit

One bit I don't have and need to get is a tapered ball nose. I plan to do some 3D carving soon and have some 1/8" and 1/4" ball nose bits but have been looking at 1/16" tapered ball nose bits.

Should I get 2, 3, or 4 flutes? I know stepover is the key on these and I'm certain I'll start out with conservative settings. As of right now I don't even have a project in mind so whatever I get will be like most bits in this area and I'll just make it work.

I don't want to spend $50 or more on this bit until I get comfortable with what I'll want. I know you get what you pay for but I've seen bits in the $20 range up to $35 and that's where I'd like to start. Probably 90% of what I cut will be Walnut, Maple, Cherry, etc.

Suggestions, please.

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post #2 of 17 (permalink) Old 05-21-2019, 04:44 PM
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JERRAY CNC Carving 4.82 Deg Tapered Angle Ball Tip Radius=0.5mm X 1/4" Shank Tungsten Solid Carbide HRC55 with TiAIN Coated Router Bits https://www.amazon.com/dp/B015C61XX4..._ldh5CbQ0TN6WM

Here ya go David.
I use it on wood and bronze, it does great on both!! $16
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post #3 of 17 (permalink) Old 05-21-2019, 06:25 PM Thread Starter
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Thanks, Joe! I was actually looking at that one in the 1mm radius. Do I need to get the 0.5mm radius instead? Or should I get both...?

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post #4 of 17 (permalink) Old 05-21-2019, 07:27 PM
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I like the .5 but I'll probably get the 1mm also.
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post #5 of 17 (permalink) Old 05-21-2019, 09:48 PM
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I also have those in the 1/8" shank bits. Here is a link to the set but you can buy them individually. https://www.amazon.com/Package-Assor...eb_16336927011
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post #6 of 17 (permalink) Old 05-22-2019, 12:44 AM
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The Jerray 0.5 mm is an excellant bit. I use it a lot. My normal bits are 0.5mm TBN, 1/16" TBN, and 1/8" TBN for larger pieces. I almost always use a 8% stepover in Aspire when using TBN. With the Jerray, the surface comes out like glass.

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post #7 of 17 (permalink) Old 05-22-2019, 08:43 AM
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I have used this same one but in 2MM. I'm going to buy the 1MM
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post #8 of 17 (permalink) Old 05-22-2019, 09:11 AM
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Quote:
Originally Posted by gkas View Post
I almost always use a 8% stepover in Aspire when using TBN. With the Jerray, the surface comes out like glass.
So what bit do you use to cut the mirror circles with? Pcd Diamond?
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post #9 of 17 (permalink) Old 05-22-2019, 09:14 AM
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David, while the usual recommendation is 2 flute bits for most wood cutting, for the smaller tapered ball nose Ron Reed at PreciseBits recommends 3 flutes because the bits are quite a bit stronger, allowing a bit more aggressive feed rates. He has presented at our CNC User Group a couple of times, and is extremely knowledgeable. PreciseBits has some excellent tapered ball nose bits, and their shop is only two miles from where we usually meet. I also have and have used some of the import ones, and they are fine, but in my opinion, the PreciseBits ones cut a bit cleaner

For a project I am working on, I will shortly doing be some side by side testing, same design, same wood, different bits, so I hope to have a little more evidence as to whether my opinion can be substantiated.
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post #10 of 17 (permalink) Old 05-22-2019, 09:46 AM Thread Starter
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I'm certainly looking forward to that, Richard. I ordered the 0.5mm and 1.0mm Jerray bits to get started and will just go from there.

I did see a Yonico 4 flute bit at 1/16" and it looks pretty good at $24.95. Also saw an Amana in the same specs as the Yonico but it was $46.50 and I didn't want to spend that much right out of the gate.

Looks like I need to get a file ready, the bits will be here tomorrow!

David

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