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Posted

Afternoon All,

I am looking for a 1-1/2-inch radius roundover bit.  I can work with either a 1/2-inch shaft or a 1/4-inch shaft.  BUT, I need a 1/4-inch bearing.  Anyone know where I might be able to obtain one of these.  Looking for make a wooden gear.  The 1-1/2-inch radius closely matches a involute profile, but the standard 1/2-inch bearing is too wide for the gear slot width.

Any insight would b appreciated,

 

Greg

Posted

Most router bits that have bearings have interchangeable bearings.  So, you need a 1/2" shaft 1-12" radius roundover bit and a 1/4" bearing, bought separately.

But then, you'll get a 1/4" step where the roundover ends, since the bearing is smaller than the bit was designed for.

What are you trying to do?  There may be a better way to do it.

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Posted
On 11/24/2024 at 1:19 PM, wtnhighlander said:

That is a really large radius. Doubt you'll find one with a 1/4" shank, but they seem to be readily available in 1/2" shank.

    

 

Don't care about teh shank diameter.  1/4 or 1/2 is fine.  I need a 1/4 bearing diameter.

On 11/24/2024 at 1:28 PM, Beechwood Chip said:

Most router bits that have bearings have interchangeable bearings.  So, you need a 1/2" shaft 1-12" radius roundover bit and a 1/4" bearing, bought separately.

But then, you'll get a 1/4" step where the roundover ends, since the bearing is smaller than the bit was designed for.

What are you trying to do?  There may be a better way to do it.

Trying to make a wood gear.  As described above, the 1-1/2 inch radius will mimic an involute shape, but the standard 1/2 inch diameter bearing is too big.

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Posted
On 11/24/2024 at 8:13 PM, bug_hunter said:

Trying to make a wood gear.  As described above, the 1-1/2 inch radius will mimic an involute shape, but the standard 1/2 inch diameter bearing is too big.

Matthais Wandel has a lot of information on making wooden gears on woodgears.ca.  Here's a video that might help.  I think he uses a band saw.

Posted

1 1/2" radius

https://www.woodcraft.com/products/whiteside-2016-roundover-router-bit-1-2-sh-1-1-2-r-x-3-3-4-d-x-1-7-8-cl?variant=43403475091594&gad_source=1&gbraid=0AAAAADiA6Y38pXa9HGqFmnhi6Y7UxrtfO&gclid=EAIaIQobChMIhOun5Zz4iQMVuCzUAR2PKSphEAQYByABEgLQX_D_BwE&gclsrc=aw.ds

Probably made with 1/2" shank only. If it was made with a 1/4" shank I would not buy it. All kinds of vibrations. And to run a bit like that you need at least 2 hp...

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