As you can see, the rear roller is flat. We have had several inquiries regarding a roller that is crowned to facilitate relieving the corners of wide plane irons. Although this sounds like a good idea, the math makes no practical sense. For example, if one wants to relieve the corners of a plane iron by .002″-.003″, the crown in the honing guide roller would be around .001″. This is just not a practical idea (in our opinion) when the same results can be achieved with finger pressure applied to each corner during honing. If a more severe crown is required, a barrel shaped roller might make sense, and if you have that need, you can easily remove the stock roller and insert a shop made roller (wood will work) for your needs.

Lastly, it is not clear in this clip but the clamping bridle pivots and will accommodate aggressively tapered tools–the most common of which are Japanese chisels.

Thanks for watching.

-John