Mike Holbrook
08-01-2016, 9:40 AM
I posted a thread recently in an attempt to get more specific information on specifically how to modify chip breakers. The thread went off on a discussion of whether or not to camber the edge of the CB or not and neglected to discuss any other aspects of modifying CBs.
I bought a number of LV double irons and two new LV Custom planes in the last year or so. I am specifically interested in how to improve those edges. I have read a few different posts, and Derek's site regarding how to modify these CBs. These double blades are not made like Stanley double blades. The CBs on the LV blades do not have the hump near the edge of the blade. The angle of the LV CBs is less than the 30 degrees I hone my blade bevels at. Other posts I have read suggest a steeper angle. Instead of the hump in the edge of the LV blades, there is an approximately 1/4" raised area on the bottom of the CBs.
My question becomes whether to do a micro bevel, change the entire bevel to X different angle, or maybe a steeper hollow grind. I am wondering if anyone has tried hollow grinding a CB edge? Maybe hollow grind the entire bevel then grind a steep micro bevel in the edge of the hollow?
Certainly a hollow grind makes the surface the chip hits concave vs the convex surface Stanley planes have. I have read some information that seems to prefer that the chip ejects straight up instead of curling. I am wondering if the chip makes contact with a concave vs convex surface if the chip might eject straighter? Those who hate the idea of a hollow ground CB, please post what kind/angle bevel you would suggest. It might be harder to do but the CB edge could be modified to be convex, more like a Stanley CB.
I bought a number of LV double irons and two new LV Custom planes in the last year or so. I am specifically interested in how to improve those edges. I have read a few different posts, and Derek's site regarding how to modify these CBs. These double blades are not made like Stanley double blades. The CBs on the LV blades do not have the hump near the edge of the blade. The angle of the LV CBs is less than the 30 degrees I hone my blade bevels at. Other posts I have read suggest a steeper angle. Instead of the hump in the edge of the LV blades, there is an approximately 1/4" raised area on the bottom of the CBs.
My question becomes whether to do a micro bevel, change the entire bevel to X different angle, or maybe a steeper hollow grind. I am wondering if anyone has tried hollow grinding a CB edge? Maybe hollow grind the entire bevel then grind a steep micro bevel in the edge of the hollow?
Certainly a hollow grind makes the surface the chip hits concave vs the convex surface Stanley planes have. I have read some information that seems to prefer that the chip ejects straight up instead of curling. I am wondering if the chip makes contact with a concave vs convex surface if the chip might eject straighter? Those who hate the idea of a hollow ground CB, please post what kind/angle bevel you would suggest. It might be harder to do but the CB edge could be modified to be convex, more like a Stanley CB.