09-14-2018, 02:58 PM
(This post was last modified: 09-14-2018, 05:40 PM by KnifeGrinders.)
In the beginning of the SET development, Mike experimented with perpendicular load on the edge.
Here are excerpts from the page 4 to 6 of the post Edge Retention/Rolling Test Stand http://www.bessex.com/forum/showthread.p...240&page=4
FLAT IMPACTOR (flat end of a steel rod)
2140 grams = about 4.7 lbs load on a hardened 5/16" steel rod did not effect the burr-free edge of a mid-range Henkel chef's knife - the same BESS reading of 160 BESS and unchanged optical microscopy.
![[Image: Test_Stand_Weight.JPG]](http://knifegrinders.com.au/photos/Test_Stand_Weight.JPG)
RADIUS IMPACTOR (round of a steel rod)
"If you recall, in our earlier test with the 5/16" rod end this amount of weight didn't affect the edge. With only the radius of the 1" diameter rod contacting the edge now, it did and substantially so..." - seen both on the sharpness tester (from 150 BESS to 700) and under x140 magnification.
![[Image: test_stand_load.jpg]](http://knifegrinders.com.au/photos/test_stand_load.jpg)
FURTHER TESTS with the rod
1000 grams load rolled the edge of 150 BESS by 325 points (measured 475 BESS). "Once again we can see the rolled edge at 140X."
Steve, the Mike's flat impactor tells us that a load of 2+ kg (4.7 lbs) on your brass plate is absolutely safe for a burr-free edge.
The question remains whether we can detect wire edge on the plate, or have to use some sort of radius impactor.
The above flat impact is similar to your plate, and the radius impact can be done on a pipe or rod placed horizontally. Copper, brass and lead or soldering tin are readily available in plates, pipes and rods and should be safe for the de-burred edge. I will have time for testing tomorrow, and you please keep us posted on your findings.
I will also test the PEX plastic pipe, used in deburring stubborn burrs on mainstream s/s knives. For those new to this technique, you scrub the edge perpendicular to the length of the PEX pipe - first in one direction, and hone the opposite side of the edge, then in the other direction and hone the other side of the edge.
Last year I tried the PEX plastic pipe as an aid in deburring high-end knives with no success, but it still may be useful for detecting the wire edge.
Here are excerpts from the page 4 to 6 of the post Edge Retention/Rolling Test Stand http://www.bessex.com/forum/showthread.p...240&page=4
FLAT IMPACTOR (flat end of a steel rod)
2140 grams = about 4.7 lbs load on a hardened 5/16" steel rod did not effect the burr-free edge of a mid-range Henkel chef's knife - the same BESS reading of 160 BESS and unchanged optical microscopy.
RADIUS IMPACTOR (round of a steel rod)
"If you recall, in our earlier test with the 5/16" rod end this amount of weight didn't affect the edge. With only the radius of the 1" diameter rod contacting the edge now, it did and substantially so..." - seen both on the sharpness tester (from 150 BESS to 700) and under x140 magnification.
FURTHER TESTS with the rod
1000 grams load rolled the edge of 150 BESS by 325 points (measured 475 BESS). "Once again we can see the rolled edge at 140X."
Steve, the Mike's flat impactor tells us that a load of 2+ kg (4.7 lbs) on your brass plate is absolutely safe for a burr-free edge.
The question remains whether we can detect wire edge on the plate, or have to use some sort of radius impactor.
The above flat impact is similar to your plate, and the radius impact can be done on a pipe or rod placed horizontally. Copper, brass and lead or soldering tin are readily available in plates, pipes and rods and should be safe for the de-burred edge. I will have time for testing tomorrow, and you please keep us posted on your findings.
I will also test the PEX plastic pipe, used in deburring stubborn burrs on mainstream s/s knives. For those new to this technique, you scrub the edge perpendicular to the length of the PEX pipe - first in one direction, and hone the opposite side of the edge, then in the other direction and hone the other side of the edge.
Last year I tried the PEX plastic pipe as an aid in deburring high-end knives with no success, but it still may be useful for detecting the wire edge.
http://knifeGrinders.com.au