Hardness Conversion CJT Koolcarb Catalog Solid Carbide Non-Coolant Fed Drills

BRINELL	ROCKWELL
3000 kgm Load Hardness	150 kgm C Scale	100 kgm B Scale	60 kgm A Scale
-	80		92.0
-	79		91.5
-	78		91.0
-	77		90.5
-	76		90.0
-	75		89.5
-	74		89.0
-	73		88.5
-	72		88.0
-	71		87.0
-	70		86.5
-	69		86.0
-	68		85.5
-	67		85.0
-	66		84.5
739	65		84.0
722	64		83.5
706	63		83.0
688	62		82.5
670	61		81.5
654	60		81.0
634	59		80.5
615	58		80.0
595	57		79.5
577	56		79.0
560	55		78.5
543	54		78.0
525	53		78.0
512	52		77.5
496	51		77.0
481	50		76.5
469	49		76.0
455	48		75.5
443	47		75.0
432	46		74.5
421	45		74.0
409	44		73.5
400	43		73.0
390	42		72.5
381	41		72.0
371	40		71.5
362	39		71.0
353	38		70.5
344	37		70.0
336	36	109*	69.5
327	35	109*	69.0
319	34	108*	68.5
311	33	108*	68.0
301	32	107*	67.5
394	31	106*	67.0
286	30	106*	66.5
279	29	105*	65.5
271	28	104*	65.0
264	27	103*	64.5
258	26	103*	64.0
253	25	102*	63.3
247	24	101*	62.8
243	23	100*	62.4
237	22	100*	62.0
231	21	99*	61.5
226	20	98*	61.0
BRINELL	ROCKWELL
3000 kgm Load Hardness	150 kgm C Scale	100 kgm B Scale	60 kgm A Scale
240	22**	100	61.5
234	21**	99	60.9
228	20**	98	60.2
222	19**	97	59.5
217	18**	96	58.9
210		95	58.0
205		94	57.5
200		93	57.0
195		92	56.5
190		91	56.0
185		90	55.5
180		89	55.0
176		88	54.0
172		87	53.5
169		86	53.0
165		85	52.5
162		84	52.0
159		83	51.0
156		82	50.5
153		81	50.0
150		80	49.5
147		79	49.0
144		78	48.5
141		77	48.0
139		76	47.0
137		75	46.5
135		74	46.0
132		73	45.5
130		72	45.0
127		71	44.5
125		70	44.0
123		69	43.5
121		68	43.0
119		67	42.5
117		66	42.0
116		65	-
114		64	41.5
112		63	41.0
110		62	40.5
108		61	40.0
107		60	39.5
106		59	39.0
104		58	38.5
103		57	38.0
101		56	-
100		55	37.5
-		54	37.0
-		53	36.5
-		52	36.0
-		51	35.5
-		50	35.0
-		53	36.5
-		52	36.0
-		51	35.5
		50	35.0