I’ve built many drawyers using a PC dovetail jig and baltic birch and have had excellent results.
For my current project, I have a couple of new sheets of baltic birch and my router bits are burning up almost immediately. This has never happened before, but I’ve now gone through 2 bits with only 4 or 5 drawyer sides!
Could this be due to some characteristic of the particular plywood I am using this time, or is my router somehow out of whack? The bits, and my approach, are the same that have worked well in the past.
Thanks for the input. Fish
Replies
Sounds like time to sharpen those bits.
Thanks Elroy. I should have been more specific: one bit had been working fine on solid stock (oak), the second one that burned up was brand-spankin'-new.
my guess its the glues. Gumming up and causing more friction then normal causing dullness.
While you would think new is fine sometimes it isn't as sharp as it should be. Are both bits the same brand?Scott
Scott's Sharpening Service
Glendale, Az.
I've noticed that my HSS dovetail bits only last about five joints before they are ineffective. My carbide bits are obviously better but I have also noticed that tearout is much more common of late, even with a brand new carbide bit. It seems that the Baltic birch is much more brittle than previously observed. Could this have an effect on the cutting ability?
How many 8" joints with 1/2" Baltic birch parts should I get before I need sharpening? Does anyone have a recomendation and pricing for send-out sharpening of bits either HSS or carbide?Windy Wood
From the Helderberg Mountains
I don't even mess with sharpening HSS bits. You can touch up the flat face with a fine hone to extend their life a little. I get $6.00 to sharpen a router bit with a shear angle. If you have cabinet shops near you you can ask them who they send their tools to and if you hear the same name often that should give you a good indication where to try sending a couple to. I can't really say how many joints you should get as their are many variables. Most of the time the better (and more expensive) bits will last longer.Scott
Scott's Sharpening Service
Glendale, Az.
Is your speed set right. To slow for that size bit.
Over the years, I've seen a wide variety in quality of 'BALTIC' birch. An article I read recently (may have been in an old magazine) talked about the differences between Russian & Finnish birch plywoods. Can't remember which was the good one. The worse stuff I was sold as 'Baltic birch' appeared to be ramin, that cheap tropical hardwood that those cheap dowels that are never round or correct diameter are made from. It was awful stuff.
The hard part is trying to establish the pedigree of the sheets at your local supplier.
Paul
This forum post is now archived. Commenting has been disabled