Hapstone R2 Uneven Bevels

[nevertakeadayoff]

I disagree unless you're buying gas station knives. Most edges that I have seen on knives that I buy are pretty even. I just assume that a dry belt was used on them and reprofile the edges to make sure the edges are on some good steel.

Every Benchmade knife I'eve ever purchased has a different angle on each side. Kershaw, too, when I used to buy them. I expect that on every knife. What knives do you buy where you don't see this???

 

[000Robert]

Every Benchmade knife I'eve ever purchased has a different angle on each side. Kershaw, too, when I used to buy them. I expect that on every knife. What knives do you buy where you don't see this???

I've never owned a Benchmade knife. I can't speak for every brand of knife but the Gerber Gator 650 that I bought 15 years ago was pretty close on the angles. My Kershaw Launch 1 had pretty close angles. They were off a little bit but not enough to really complain about. Lately I have only been buying CPK (Carothers Performance Knives) knives. The edges that I have checked on my CPK knives were perfect.

 

[jackballed]

Hi, new to BF. I purchased a Hapstone R2 not long ago and am having similar issues as the OP. I read through this thread and followed the instructions on Gritomatic’s website but there’s a few things I could not figure out. How does one calibrate the rotary unit? Per the Gritomatic FAQ, it states calibration is needed if there’s more than 1mm difference between the crossbar sides. I have about a 3mm difference. I also have about a 1 degree difference when I flip the crossbar. Thanks in advance.

 

[777 Edge]

Hi, new to BF. I purchased a Hapstone R2 not long ago and am having similar issues as the OP. I read through this thread and followed the instructions on Gritomatic’s website but there’s a few things I could not figure out. How does one calibrate the rotary unit? Per the Gritomatic FAQ, it states calibration is needed if there’s more than 1mm difference between the crossbar sides. I have about a 3mm difference. I also have about a 1 degree difference when I flip the crossbar. Thanks in advance.

Hi jackballed , and welcome to Blade Forums!

Congratulations on your Hapstone R2, it's a phenomenal sharpening system.

To adjust the angle of your crossbar, slightly loosen the 2 smaller Allen head screws on either side of the center bolt. (And possibly also the central bolt if needed) You'll find that it then has enough "play" to be able to slightly rotate it up or down to adjust and perfectly calibrate the crossbar. Remove your knife clamps from the crossbar, then use your digital angle cube to check both sides of the crossbar. Adjust methodically until they are even. Then carefully tighten the screws again.

 

[3D Anvil]

The vast majority of knives I've purchased had uneven grinds. It may not be noticeable out of the box, but It becomes quite noticeable when you lay the edge back, as I always do.

 

[jackballed]

Hi jackballed , and welcome to Blade Forums!

Congratulations on your Hapstone R2, it's a phenomenal sharpening system.

To adjust the angle of your crossbar, slightly loosen the 2 smaller Allen head screws on either side of the center bolt. (And possibly also the central bolt if needed) You'll find that it then has enough "play" to be able to slightly rotate it up or down to adjust and perfectly calibrate the crossbar. Remove your knife clamps from the crossbar, then use your digital angle cube to check both sides of the crossbar and adjust slightly until they are even. Then carefully tighten the screws again.

Thank you for the detailed response, 777 Edge ! I will do my best to level this puppy out.

Also, what does the bolt on the underside of the crossbar do? That one I did mess with a little, but I did not see what it affects.

Thanks again for the help.

 

[777 Edge]

Thank you for the detailed response, 777 Edge ! I will do my best to level this puppy out.

Also, what does the bolt on the underside of the crossbar do? That one I did mess with a little, but I did not see what it affects.

Thanks again for the help.

My pleasure.

The bolt on the underside of the crossbar is for the bearing behind the crossbar.

It is this bearing that gives the R2 rotating mechanism its smooth action. If you messed with that one, make sure it is tightened again or your bearing will be loose.

 

[jackballed]

My pleasure.

The bolt on the underside of the crossbar is for the bearing behind the crossbar.

It is this bearing that gives the R2 rotating mechanism its smooth action. If you messed with that one, make sure it is tightened again or your bearing will be loose.

Ah, yes. That makes sense. I took the bolt, spring, and bearing/washers off the rotary unit (is that the correct naming?) and pulled the crossbar out. I was able to see what the underside bolt/screw was doing. The square nut became loose and was causing the crossbar to have slight play even though the rotary unit was tight. I tightened the square nut, put everything back together, adjusted the crossbar per our previous replies, and got both sides of the crossbar to 0 degrees. So far everything seems a lot more “balanced” when sharpening. Thanks again, 777 Edge