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Countersinks / 79

HSS Chatterless 6 Flute Countersink

M.A.FordMax®

Standard 6 Flute countersinks are designed for economical, general purpose countersinking, chamfering or deburring. Because of the multiple flute design, chip loads are generally smaller. Even at maximum speeds, chatter-free machining is possible.

6 Flutes
HSS
Available with 60°, 82°, 90°, 100° and 120° included angles
Included Angle Code (8th character of tool number): 1=60°, 2=82°, 3=90°, 4=100°, 6=120°
Straight shank with tang drive on sizes 1-1/4" and above
Steam homogeneous surface treatment (blackening) is used to prolong tool life and prevent galling
Uncoated, coating available upon request

Materials

Series Attributes

Downloads

Speed and Feed Data

Series 79 Catalog Pages

Line Drawing

Product Range

	Tool No.	EDP	Diameter (D/D1)	Shank Diameter (D2)	Overall Length (L1)	Non-Cutting Tip Dia Max (D3)	Included Angle (A)	Material	Coating	Shank Type

.1250	79012501	79021	1/8	1/8	1-1/2	.030	60°	HSS	Uncoated	Straight
.1250	79012502	79026	1/8	1/8	1-1/2	.030	82°	HSS	Uncoated	Straight
.1250	79012503	79031	1/8	1/8	1-1/2	.030	90°	HSS	Uncoated	Straight
.1250	79012504	79036	1/8	1/8	1-1/2	.030	100°	HSS	Uncoated	Straight
.1250	79012506	79041	1/8	1/8	1-1/2	.030	120°	HSS	Uncoated	Straight
.1875	79018701	79046	3/16	3/16	1-1/2	.040	60°	HSS	Uncoated	Straight
.1875	79018702	79051	3/16	3/16	1-1/2	.040	82°	HSS	Uncoated	Straight
.1875	79018703	79056	3/16	3/16	1-1/2	.040	90°	HSS	Uncoated	Straight
.1875	79018704	79061	3/16	3/16	1-1/2	.040	100°	HSS	Uncoated	Straight
.1875	79018706	79066	3/16	3/16	1-1/2	.040	120°	HSS	Uncoated	Straight
.2500	79025001	79071	1/4	1/4	2	.060	60°	HSS	Uncoated	Straight
.2500	79025002	79076	1/4	1/4	2	.060	82°	HSS	Uncoated	Straight
.2500	79025003	79081	1/4	1/4	2	.060	90°	HSS	Uncoated	Straight
.2500	79025004	79086	1/4	1/4	2	.060	100°	HSS	Uncoated	Straight
.2500	79025006	79091	1/4	1/4	2	.060	120°	HSS	Uncoated	Straight
.2500	79025002T	76866	1/4	1/4	2	.060	82°	HSS	Uncoated	Tang
.3125	79031201	79096	5/16	1/4	2	.080	60°	HSS	Uncoated	Straight
.3125	79031202	79101	5/16	1/4	2	.080	82°	HSS	Uncoated	Straight
.3125	79031203	79106	5/16	1/4	2	.080	90°	HSS	Uncoated	Straight
.3125	79031204	79111	5/16	1/4	2	.080	100°	HSS	Uncoated	Straight
.3125	79031206	79116	5/16	1/4	2	.080	120°	HSS	Uncoated	Straight
.3750	79037501	79121	3/8	1/4	2	.090	60°	HSS	Uncoated	Straight
.3750	79037502	79126	3/8	1/4	2	.090	82°	HSS	Uncoated	Straight
.3750	79037503	79131	3/8	1/4	2	.090	90°	HSS	Uncoated	Straight
.3750	79037504	79136	3/8	1/4	2	.090	100°	HSS	Uncoated	Straight
.3750	79037506	79141	3/8	1/4	2	.090	120°	HSS	Uncoated	Straight
.5000	79050001	79146	1/2	3/8	2	.150	60°	HSS	Uncoated	Straight
.5000	79050002	79151	1/2	3/8	2	.150	82°	HSS	Uncoated	Straight
.5000	79050003	79156	1/2	3/8	2	.150	90°	HSS	Uncoated	Straight
.5000	79050004	79161	1/2	3/8	2	.150	100°	HSS	Uncoated	Straight
.5000	79050006	79166	1/2	3/8	2	.150	120°	HSS	Uncoated	Straight
.6250	79062501	79171	5/8	3/8	2-1/4	.180	60°	HSS	Uncoated	Straight
.6250	79062502	79176	5/8	3/8	2-1/4	.180	82°	HSS	Uncoated	Straight
.6250	79062503	79181	5/8	3/8	2-1/4	.180	90°	HSS	Uncoated	Straight
.6250	79062504	79186	5/8	3/8	2-1/4	.180	100°	HSS	Uncoated	Straight
.6250	79062506	79191	5/8	3/8	2-1/4	.180	120°	HSS	Uncoated	Straight
.6250	79062503T	76867	5/8	3/8	2-1/4	.180	90°	HSS	Uncoated	Tang
.7500	79075001	79196	3/4	1/2	2-3/4	.210	60°	HSS	Uncoated	Straight
.7500	79075002	79201	3/4	1/2	2-3/4	.210	82°	HSS	Uncoated	Straight
.7500	79075003	79206	3/4	1/2	2-3/4	.210	90°	HSS	Uncoated	Straight
.7500	79075004	79211	3/4	1/2	2-3/4	.210	100°	HSS	Uncoated	Straight
.7500	79075006	79216	3/4	1/2	2-3/4	.210	120°	HSS	Uncoated	Straight
.7500	79075002T	76868	3/4	1/2	2-3/4	.210	82°	HSS	Uncoated	Tang
.7500	79075003T	76869	3/4	1/2	2-3/4	.210	90°	HSS	Uncoated	Tang
.7500	79075006T	76870	3/4	1/2	2-3/4	.210	120°	HSS	Uncoated	Tang
.8750	79087501	79221	7/8	1/2	2-3/4	.230	60°	HSS	Uncoated	Straight
.8750	79087502	79226	7/8	1/2	2-3/4	.230	82°	HSS	Uncoated	Straight
.8750	79087503	79231	7/8	1/2	2-3/4	.230	90°	HSS	Uncoated	Straight
.8750	79087504	79236	7/8	1/2	2-3/4	.230	100°	HSS	Uncoated	Straight
.8750	79087506	79241	7/8	1/2	2-3/4	.230	120°	HSS	Uncoated	Straight
1.0000	79100001	79246	1	1/2	2-3/4	.250	60°	HSS	Uncoated	Straight
1.0000	79100002	79251	1	1/2	2-3/4	.250	82°	HSS	Uncoated	Straight
1.0000	79100003	79256	1	1/2	2-3/4	.250	90°	HSS	Uncoated	Straight
1.0000	79100004	79261	1	1/2	2-3/4	.250	100°	HSS	Uncoated	Straight
1.0000	79100006	79266	1	1/2	2-3/4	.250	120°	HSS	Uncoated	Straight
1.0000	79100002T	76871	1	1/2	2-3/4	.250	82°	HSS	Uncoated	Tang
1.0000	79100003T	76872	1	1/2	2-3/4	.250	90°	HSS	Uncoated	Tang
1.2500	79125001	79271	1-1/4	1/2	3	.370	60°	HSS	Uncoated	Tang
1.2500	79125002	79276	1-1/4	1/2	3	.370	82°	HSS	Uncoated	Tang
1.2500	79125003	79281	1-1/4	1/2	3	.370	90°	HSS	Uncoated	Tang
1.2500	79125004	79286	1-1/4	1/2	3	.370	100°	HSS	Uncoated	Tang
1.2500	79125006	79291	1-1/4	1/2	3	.370	120°	HSS	Uncoated	Tang
1.5000	79150001	79296	1-1/2	3/4	3-1/2	.430	60°	HSS	Uncoated	Tang
1.5000	79150002	79301	1-1/2	3/4	3-1/2	.430	82°	HSS	Uncoated	Tang
1.5000	79150003	79306	1-1/2	3/4	3-1/2	.430	90°	HSS	Uncoated	Tang
1.5000	79150004	79311	1-1/2	3/4	3-1/2	.430	100°	HSS	Uncoated	Tang
1.5000	79150006	79316	1-1/2	3/4	3-1/2	.430	120°	HSS	Uncoated	Tang
2.0000	79200001	79321	2	3/4	3-3/4	.620	60°	HSS	Uncoated	Tang
2.0000	79200002	79326	2	3/4	3-3/4	.620	82°	HSS	Uncoated	Tang
2.0000	79200003	79331	2	3/4	3-3/4	.620	90°	HSS	Uncoated	Tang
2.0000	79200004	79336	2	3/4	3-3/4	.620	100°	HSS	Uncoated	Tang
2.0000	79200006	79341	2	3/4	3-3/4	.620	120°	HSS	Uncoated	Tang
2.5000	79250001	79346	2-1/2	3/4	5	.750	60°	HSS	Uncoated	Tang
2.5000	79250002	79351	2-1/2	3/4	5	.750	82°	HSS	Uncoated	Tang
2.5000	79250003	79356	2-1/2	3/4	5	.750	90°	HSS	Uncoated	Tang
3.0000	79300001	79361	3	3/4	5-1/4	1.000	60°	HSS	Uncoated	Tang
3.0000	79300002	79366	3	3/4	5-1/4	1.000	82°	HSS	Uncoated	Tang
3.0000	79300003	79371	3	3/4	5-1/4	1.000	90°	HSS	Uncoated	Tang