WTB: Crown Negative Rake Shear Scraper

[Tony Perelli]

I've been interested in trying one of these, if anyone has one that is sitting around and needs a new home let me know. Thanks!

https://www.woodturnerscatalog.com/...Scraper?term=crown+scraper&term=crown scraper

 

[John Hicks]

I just use a regular ground scraper and turn it at an angle. I can see where that round shank would be nice.

 

[Doug Freeman]

Cheap and easy to make your own with a grinder, drill, and tap. Mild steel bar, 5/8 or 3/4, from the box store. I ground the insert mount parallel to the shaft. Tried it at an angle like that one, and the shaft needed to be too “square” to the work.

 

[brian horais]

Tony, I would recommend making your own NRS from a standard scraper. Buy a thick one (1/2 inch) to minimize chatter. I used my metal grinder to do the initial grinding and then finished the grinding on my lathe tool grinding setup. The bottom angle is the same as I use for my roughing gouge -that way I always have the angle set up to do touch-up grinds on the NRS. The upper angle (shown in the image) is steeper to ensure the included angle between surfaces is less that 90 degrees. You will notice that I made the NRS two-sided. This lets me use it inside and outside my bowls/turnings in whatever holding direction I need. Hope this helps.

Brian

 

[Tony Perelli]

Cheap and easy to make your own with a grinder, drill, and tap. Mild steel bar, 5/8 or 3/4, from the box store. I ground the insert mount parallel to the shaft. Tried it at an angle like that one, and the shaft needed to be too “square” to the work.

Thanks Doug!

 

[Tony Perelli]

Tony, I would recommend making your own NRS from a standard scraper. Buy a thick one (1/2 inch) to minimize chatter. I used my metal grinder to do the initial grinding and then finished the grinding on my lathe tool grinding setup. The bottom angle is the same as I use for my roughing gouge -that way I always have the angle set up to do touch-up grinds on the NRS. The upper angle (shown in the image) is steeper to ensure the included angle between surfaces is less that 90 degrees. You will notice that I made the NRS two-sided. This lets me use it inside and outside my bowls/turnings in whatever holding direction I need. Hope this helps.

Brian

Thanks Brian! Also - I enjoyed your Therming article in the AAW journal.