bug_hunter Posted November 24, 2024 Report Posted November 24, 2024 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 Quote
wtnhighlander Posted November 24, 2024 Report Posted November 24, 2024 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. 1 Quote
Beechwood Chip Posted November 24, 2024 Report Posted November 24, 2024 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. 1 Quote
bug_hunter Posted November 25, 2024 Author Report Posted November 25, 2024 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. 1 Quote
Beechwood Chip Posted November 25, 2024 Report Posted November 25, 2024 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. Quote
Beechwood Chip Posted November 25, 2024 Report Posted November 25, 2024 On 11/24/2024 at 8:52 PM, Beechwood Chip said: 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. Here's a video using a router. And here's one that specifically mentions involute gears. Quote
curlyoak Posted November 25, 2024 Report Posted November 25, 2024 https://whitesidemachine.com/?param1=ads1&gad_source=1&gbraid=0AAAAA-gQyzQkFzUrJ_FEcPoZ11hkxMvok&gclid=EAIaIQobChMIwo-L17H3iQMVjSfUAR1jAA8vEAAYASAAEgKfIvD_BwE A link to Whiteside. Call customer service. Very friendly and helpful. 1 Quote
curlyoak Posted November 25, 2024 Report Posted November 25, 2024 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... 1 Quote
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