Shearing bits vs spiral bits for edge jointing

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Forum topic by Sirgreggins posted 02-03-2015 04:25 PM 913 views 0 times favorited 3 replies Add to Favorites Watch
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299 posts in 2438 days

02-03-2015 04:25 PM

Hey guys, A friend of mine is looking to get into woodworking and I was going through the basics of router bits the other day with him and he asked why one would use a shearing bit vs a spiral bit when edge jointing on the router table. I told him I didn’t think there would be much difference in the cut on the edge and that the helical blade slices the wood leaving a cleaner cut. Is there any reason to use one over the other in that situation?


3 replies so far

View TheFridge's profile


10744 posts in 1688 days

#1 posted 02-03-2015 05:10 PM

don’t think it matters that much. I haven’t use the spiral but I’ve never seen that tearout was a problem with them when they come out the grain. Unless one of them can produce a completely finished edge, it’s not gonna matter to me.

-- Shooting down the walls of heartache. Bang bang. I am. The warrior.

View pintodeluxe's profile


5798 posts in 3016 days

#2 posted 02-03-2015 05:57 PM

The spiral bits have more angle to the cutters. They work great. A 1/4” spiral bit is so versatile for plunge cuts, mortises, and trimming. If you don’t need a large diameter bit, they are pretty inexpensive too.
I have some shearing bits, and they work fine. They cut more like straight bits (ie: pretty good cuts with occasional small chipout).

-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

View Gene Howe's profile

Gene Howe

11067 posts in 3631 days

#3 posted 02-03-2015 06:03 PM

Here is a solid carbide end mill. 1/2” with a cutting length of 2”.
Pretty pricey, though. But, I’ll bet it would do the trick.

-- Gene 'The true soldier fights not because he hates what is in front of him, but because he loves what is behind him.' G. K. Chesterton

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