[wgraft5]

I need to buy a 3/4 roundover bit for a router.

I did a search but could not find the thread that someone started asking same question. One of the woodworking/flatpack providers gave a detailed answer.

I know I need a 3/4 roundover bit with the bearing on the bottom.  But don't know the official name for it.

I will be renting a router so it can be a very cheap one. It only has to last a hour or so of use. Then I probably won't need it again.

So a Amazon, Home Depot, lowes etc. A link to or at least a part number with the correct name would be helpful.

Thanks,

Wayne in Oregon

[WGH]

I always recommend Grizzly Tools, affordable with excellent quality. Been buying from them for 30 years.

A 3/4" roundover (radius) is 2" in diameter, a big bit. I recommend a 1/2" shank. Make sure the router can handle it. $18.95
https://www.grizzly.com/products/grizzly-3-4-r-roundover-bit-1-2-shank/c1189

The hole in the rent-a-router's base may be smaller than 2" so you will have to make a new base plate from 1/4" plywood and a 2-1/4" hole saw, you will need the arbor too.
https://www.grizzly.com/products/steelex-plus-2-1-4-bi-metal-hole-saw-5-8-arbor/d2773
https://www.grizzly.com/products/steelex-plus-5-8-x-18-unf-hole-saw-arbor/d2798

But don't order router bit just yet, look at the router first, see if it comes with a 1/2" collet and measure the base plate hole. Woodworking is about measuring, not guessing.
"Measure twice, cut once"

[wgraft5]

Thanks for the fast reply WGH.

That looks like what I needed.

All I know is the router is it is a Makita.

I will call the rental place to find out what size the shank is. And how big the hole in the base plate is.

Thanks.

Wayne in Oregon

[S Clark]

Grizzly makes very good bits for the price.  So does Whiteside.  But you're only going to use it for one project???  Buy a 1/2" shaft chinese bit from Amazon or where ever.  They are very functional if not super durable- and half the price.  I don't recommend a 1/4" shaft on a cheap bit... especially if you're new to this. 
If you must buy a 1/4" shank, but sure to make multiple passes and go sssllllooowww.   I've had more than one 1/4"  shaft break. 

https://www.amazon.com/Rannb-Roundover-Cutting-Bearing-Rounding/dp/B08RYDYV1S/ref=sr_1_9?crid=26RXWN8T2UNOX&keywords=3%2F4+roundover+router+bit+1%2F2+shank&qid=1665795306&qu=eyJxc2MiOiIyLjQ0IiwicXNhIjoiMi4yNCIsInFzcCI6IjEuOTYifQ%3D%3D&s=hi&sprefix=3%2F4+roundover+bit+%2Ctools%2C198&sr=1-9#customerReviews


If you think there is even a chance that you might do multiple projects, step up to carbide... these really are pretty decent for the $$
https://www.amazon.com/Yonico-13168-Edging-Router-4-Inch/dp/B00KZM15Y8/ref=sr_1_4?crid=26RXWN8T2UNOX&keywords=3%2F4%2Broundover%2Brouter%2Bbit%2B1%2F2%2Bshank&qid=1665795435&qu=eyJxc2MiOiIyLjQ0IiwicXNhIjoiMi4yNCIsInFzcCI6IjEuOTYifQ%3D%3D&s=hi&sprefix=3%2F4%2Broundover%2Bbit%2B%2Ctools%2C198&sr=1-4&th=1

[emailtim]

I always recommend Grizzly Tools, affordable with excellent quality. Been buying from them for 30 years.

A 3/4" roundover (radius) is 2" in diameter, a big bit. I recommend a 1/2" shank. Make sure the router can handle it. $18.95
https://www.grizzly.com/products/grizzly-3-4-r-roundover-bit-1-2-shank/c1189

Thanks for the tip on Grizzly.  Never thought about Grizzly for cutters, only tools.  How well do their router bits hold up ? 

I have mostly used carbide tip router bits (Whiteside, CMT, vintage Craftsman, Freud, Diablo, Bosch, etc.).  I tried some cheap Harbor Freight spiral bits on a whim, but they didn't cut cleanly.

[aterphasma]

I used to sell cutting tools -- unless it's loudly advertised as USA-made, Grizzly's parts are import. Good import, but still import. It'll hold up fine.

I personally would recommend that Yonico bit that S Clark linked, mostly because they use a slightly harder grade of carbide -- C3, which is a decent grade for the purpose. Grizzly's spec sheet says they used K20 grade (approximately C2 grade), which is slightly less hard, a bit tougher. The Grizzly bit will stand (slightly) more impact without fracturing, but will also dull (slightly) faster. (Edit: Yonico will probably last a bit longer. Enough to matter? It's all pretty similar. Neither will appreciate a hard crack on concrete floor.)