Sutton 4.3mm 90° Three Flute Countersink C107 DIN 335 - HSS Cobalt - 40mm OAL

The Sutton C107 is a 90° three flute DIN 335 countersink in HSS cobalt (5% Co). It is made to DIN 335 for countersinking and counterboring screw holes, deburring, chamfering tapped holes and machine applications. This range has 20 sizes, 4.3, 5.3, 6.3, 7.3, 8, 8.4, 9.4, 10, 10.4, 11.5, 12.4, 13.4, 15, 16.5, 19, 20.5, 23, 25, 30 and 31 mm (countersink diameter d1), for screw heads from M2 to M10.

The 5% cobalt grade high speed steel body has a constant flute rake along the entire cutting face, axial and radial adjusted relief, higher dimensional precision and an improved, sharper cutting edge. These are designed for chatter-free countersinking and deburring, longer tool life and excellent chip flow. This is the Type N geometry. The bright finish suits general purpose use.

Where this product is used

• Countersinking and counterboring screw holes for countersunk screws to DIN 963, 964, 965, 966, 7513 and 7516, and ISO 2009, 2010, 7046-1, 7046-2 and 7047.
• Deburring and chamfering tapped holes.
• Machine applications, on a drilling machine or milling machine.

Sizes and item numbers

Every size in the range, with its Sutton item number.

Using the tool

• Match the countersink to the screw head so the head sits flush with the surface.
• Use a low to moderate speed, and go lower on harder materials and larger diameters.
• Use cutting fluid when working steel or stainless steel.
• Hold the work firmly and keep the tool steady to reduce chatter.

Key specifications

Related products

Compare other Sutton countersinks: C108 TiAlN coated, C1070004 4 piece set, C101 deburring countersink cross hole, C103 single flute countersink and C201 HSS three flute countersinks 8.3 to 25 mm. Browse all countersink bit sets and deburring tools.