Robert Sorby 1" Negative Rake Woodturning Bowl Scraper Wood Lathe Chisel

Description

Robert Sorby Negative Rake Bowl Scraper
Think of it as
"A Woodturners Cabinet Scraper"
I'm selling this 1" wide M2 HSS negative rake bowl scraper chisel.
The scraper has been cleaned and has some scuffs, stains and light pitting on the tool steel. this does not affect the operation of the tool. The cutting edge works best when the burr is used in the up position.
The Burr cuts the cleanest, so
for best results
keep a good burr on the chisel when turning . I use a burnishing rod (
Arkansas hard ceramic stone
) to raise a burr several times before going back to the grinder.
You are bidding on and will get the chisel pictured.
Negative rake scrapers will cut the wood much cleaner than standard flat top scrapers, but will dull much faster. They are not a replacement for good tool technique. They are
not
a bulk wood removal tool. They’re a finesse tool used to clean up/touch up the interior Of flat bottom boxes by removing small micro lines, torn grain or making the final finishing or shaping cuts..
The scraper will cleanly cut very small amounts of wood leaving the surface ready for 150 to 220 grit sanding. They also work very well on plastics and acrylics cutting cleanly with a lot less chip-out.
Lastly, these negative rake scrapers don’t tend to get catches, very user friendly chisels. I personally have half a dozen of these types of chisels in different profiles in my own tool collection. Negative rake scraping is a technique dad and I learned from Stuart Batty. I’m told that it’s a very old technique that was used in the production of Ivory billiard balls in England.
A note on sharpening:
I recommend you sharpen the small micro bevel. Small bevels sharpen faster and that is the point of this suggestion. The micro bevel also allows the bottom of the scraper to have a wider foot print for stability on the tool rest. The location of the cutting edge in the body of the tool steel doesn’t affect its performance. I use a hardened burnisher to reestablish the burr on the tool after the burr is dulled / gone. Hone and raise a new hard steel burr to save the tool steel. Do this several time before returning to the grinder for resharpening.
Use a good quality Aluminum Oxide wheel, H, I, J hardness on the grinder and keep it dressed and clean. A dirty wheel won't raise a good burr. the softer wheels like the Norton ceramic jell wheels are what I sharpened this scraper on.
Please see the pictures for more information and condition as they are part of the description
A Note on Shipping Times:
I use the USPS for all my shipping. I’ve been checking the tracking on the items I’ve shipped and the USPS is taking twice as long for items to be delivered. The longest delay was 17 days for a 3-day priority mail package. Most are 6 to 8 days to complete the delivery. This is largely due to the carriers not scanning the packages when they pick them up. No scan, No tracking = slow delivery times. My carrier tells me that the USPS is overwhelmed with package deliveries and they are working with reduced staffing.
Please be patient with the USPS.