SUMMARY

Knives: Victorinox SWIBO HRC 58
Edge angle 12 dps
SET Steel roller 150 grams
Sharpness tester BESS PT50A

Sharpening
Edge set on #400 CBN wheel on Tormek, then deburred as specified below.

Deburring Mode	Average sharpness over 100 rolling cycles	% change vs Tormek
Slotted FELT Tormek 90 RPM	360
Slotted FELT Grinder 1425 RPM	380	5.5%
Slotted PAPER WHEEL Tormek 90 RPM	370
Slotted PAPER WHEEL Grinder 1425 RPM	372	0.5%
Slotted PAPER WHEEL Grinder 2850 RPM	381	3%

DATA

Data numbers in the charts is the number of the impact roller cycles with the resultant sharpness.
E.g. “ x1 = 150, x2 = 300 “ means after 1 impact cycle the edge sharpness is 150 BESS, after 2 cycles 300 BESS, and so on.

Key indicators:

§ Overall average sharpness over 100 impact cycles;

§ Average sharpness in the Phase I (elastic deformation) - calculated as an average of sharpness scores in the first 5 impact cycles;

§ Sharpness by the end of the Phase II (elasto-plastic transition) – calculated as an average of 3 sharpness scores: after 40, 45 and 50 impact cycles.

SLOTTED FELT WHEEL

Deburring Mode →	Grinder 1425 RPM	Tormek 90 RPM
Initial sharpness (BESS)	125	98
SHARPNESS (BESS)	x1=226 x2=304 x3=308 x4=282 x5=318 x10=330 x15=355 x20=383 x25=423 x30=406 x35=411 x40=418 x45=442 x50=428 x60=393 x70=451 x80=425 x90=440 x100=467	x1=222 x2=275 x3=258 x4=284 x5=277 x10=298 x15=345 x20=370 x25=392 x30=377 x35=356 x40=382 x45=397 x50=416 x60=397 x70=453 x80=429 x90=446 x100=460

KEY INDICATOR → Deburring Mode ↓	Average sharpness over 100 cycles	Average sharpness in the Phase I (elastic deformation)	Sharpness by the end of the Phase II (elasto-plastic transition)
Grinder 1425 RPM	380	288	429
Tormek 90 RPM	360	263	398

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SLOTTED PAPER WHEEL

Deburring Mode →	Grinder 2850 RPM	Grinder 1425 RPM	Tormek 90 RPM
Initial sharpness (BESS)	123	125	101
SHARPNESS (BESS)	x1=261 x2=264 x3=279 x4=323 x5=299 x10=365 x15=342 x20=374 x25=377 x30=384 x35=383 x40=413 x45=418 x50=464 x60=449 x70=467 x80=464 x90=438 x100=477	x1=247 x2=270 x3=302 x4=342 x5=317 x10=332 x15=358 x20=348 x25=375 x30=370 x35=417 x40=378 x45=437 x50=421 x60=429 x70=454 x80=400 x90=485 x100=390	x1=207 x2=247 x3=263 x4=288 x5=299 x10=322 x15=334 x20=365 x25=391 x30=386 x35=365 x40=407 x45=416 x50=436 x60=458 x70=458 x80=471 x90=464 x100=449

KEY INDICATOR → Deburring Mode ↓	Average sharpness over 100 cycles	Average sharpness in the Phase I (elastic deformation)	Sharpness by the end of the Phase II (elasto-plastic transition)
Grinder 2850 RPM	381	285	432
Grinder 1425 RPM	372	296	412
Tormek 90 RPM	370	261	420