Laminated single bevel question

[GoBow]

Have a goofy question for those of you that have triple laminated, single bevel broadheads.  Does the laminate on the "off" side of the broadhead cause the edge to have a "hump" where the main edge and the laminate meet?

My only experience with single beveled BH are Grizzly's.  But they are only two laminates and made so that the edge is continuous without the hump.

Thanks!

[Soilarch]

Somebody posted something earlier about how he had to go ahead and do a modified double bevel on the portion that is triple laminated. He termed it a "3/4" bevel.

[Sharpster]

Originally posted by GoBow:
Have a goofy question for those of you that have triple laminated, single bevel broadheads.  Does the laminate on the "off" side of the broadhead cause the edge to have a "hump" where the main edge and the laminate meet? Thanks!

GoBow,

On triple laminated, single bevel heads there can be a "hump" sometimes but, there really shouldn't be.

The presents of the hump means that the laminate layer on the "off" or unbeveled side extends out too close to the cutting edge.

Take a close look at an out of the pack (unsharpened) Zwicky No Mercy or single bevel Eclipse. You'll see that the lamination on the unbeveled side does not extend all the way to the cutting edge. They hold it back just shy of flush so that when sharpened, only the top two layers get ground.

When I modify a triple laminated tip broadhead to a single bevel, I like to remove even more of the "bottom" lamination in order to get more clearance so that even after repeated sharpenings there is no worry of developing the hump you're talking about.

Sometimes, rather than the "hump" you'll notice a "dip" in the blade where the main blade meets the laminated tip. Both defects are caused by the same thing and either can be repaired by removing more steel from the unbeveled side. Be sure to remove it flat and flush with the main blade rather than beveling it back.

Ron

[Overspined]

Yes, IMO, the no mercy are a complete nightmare to sharpen, whereas the grizzlys are easily done. I use that wet stone sharpener/grinder from harbor freight. Spent some time on both and would never buy the single bevel no mercy again. they also had too much "crap" hanging all over from the paint to the weld material. You pretty much have to double bevel the front, the 3 layer section of head, and then you can keep the back 2/3 single. I recommend sticking to the double bevel no mercy, I have no experience w/ eclipse

[ISP 5353]

Sharpster, I beg to differ.  I have had a couple of packages of the "No Mercy" heads and the bevel went right into the laminate area.  I don't believe that it should have, but they do.  They are impossible to get very sharp because the cutting area is very thick.

[Old York]

Would someone please post some clear close-up pics - I'm clueless as to what's being talked about. Thanks

[Sharpster]

Yea, I'll post a couple of pics but it probably will be a day or so. My little guy is home with a fever and all the heads are up at the shop.

Sorry about the wait but, duty calls.

Ron

[Sharpster]

Wow, Sorry for takin so long to get this posted. Here's a blank STOS modified to LH single bevel:


The unground blank broadhead:

 

Side view of the blank showing the triple thick tip section:

 

[Sharpster]

Now to modify this or any triple laminated head to a single bevel, we need to completely remove a strip of the laminate from right along the edge of what will be the unbeveled side, flush with the main blade:

 

Removing the strip along the edge of the unbeveled side prevents the "hump" from forming when the head is beveled and sharpened because now there are only two thicknesses of steel along the cutting edge. The underside of the blade is now continuously flat from tip to heel along the cutting edge, just like on a Grizzly.

After preping the unbeveled side, the primary bevel can be ground and sharpened to a straight, uniform blade with no hump or dip.

   

Just add a tanto and this is about as close to a true single as a triple laminated tip broadhead can be.

Ron