Highlights

has added new MULTI-MASTER heads with a 100° point angle to its range of 2 flute interchangeable solid carbide milling heads, for chamfering, countersinking and spot drilling. The new heads are available in 4 diameter sizes: .375” (9.525 mm), .500” (12.7 mm), .625” (15.875 mm) and .750” (19.05 mm). The new milling heads are designed mainly for countersink holes for head cap screws according to ISO 5856, DIN EN 4072, IS 15437; and for rivets according to MIL-STD-40007. The new heads can also be applied for machining countersink holes for general-use 100° flat countersunk head machine screws, in accordance with ANSI B18.6.3-1972. Most aircraft countersunk screws require a 100° angle countersink. Please see figure below


Cutting data
Initial cutting data are the same as the data specified for existing MM HCD heads of similar diameters.
We believe that the new heads will contribute greatly to expanding applications for MULTI-MASTER products, particularly in the aerospace industry.
MM HCD Metric
Interchangeable 2 Flute Solid Carbide Heads for Chamfering, Countersinking and Spot Drilling

• Do not apply lubricant to the threaded connection.
(1) May be used for F-type (fine) countersink according to DIN 74. (2) Countersink according to American National and British standard flat screws.
(3) DCX diameter tolerance (4) Number of flutes (5) May be used for 100° countersink according to ISO 5856, DIN EN 4072, ANSI B18.6.3-1972

MM HCD Inch
Interchangeable 2 Flute Solid Carbide Heads for Chamfering, Countersinking and Spot Drilling