Guhring’s MTMH3-Z Drifter series

Guhring’s MTMH3-Z Drifter series of helical drilling thread-mill products are capable of thread milling in material up to 66 HRc. The Drifter series combines core drilling and threading in a single operation.

The MTMH3-Z Drifter is suitable for wet or dry cutting, and features two oil grooves on the shaft to provide optimum cooling, as well as a left-cutting geometry that stabilises performance during climb milling. With a shank diameter from 3mm to 12mm and a neck relief from 5mm to 40mm, the thread milling series is suitable for creating threads from M2 to M16 on a material range that includes all steels and stainless steels, cast and graphite iron, aluminium, and titanium alloys. To simplify the process for end users, Guhring has also developed its CNC Guhro thread-mill software that is free to download for customers.

For manufacturers more inclined to use traditional threading methods, Guhring has the Pionex series of taps. This tapping line incorporates a polygon shape that generates 30% less torque. The Pionex thread-formers are based on a newly developed powder metallurgical cutting-tool material that demonstrates a higher wear resistance than previously attained.

Pionex taps include 45° helix geometry with a reduced rake angle, back tapering and improved relief. The latest Pionex is available with metric threads in course or fine pitch, as well as UNC, UNF and BSP, in all diameter and pitch variants with a complete line of special thread designations available upon request.

Matching the performance of the Guhring drilling and threading lines is the newly developed SpyroTec series of twisted HSS and HSCO countersink tools. As a “world first”, the SpyroTec countersinking series incorporates novel spiral-fluted geometry with convex cutting edges. The benefit of this geometry design is that the 90° countersinks can cut virtually all material types with improved concentricity, precision and performance, reports Guhring. In addition, the axial and radial forces that occur during countersinking operations are reduced by more than 60% due to the newly developed geometry of SpyroTec cutting edges. The convex radii of the cutting edges combine with the variable helical pitch to provide stable, low-vibration, low-noise and high-performance countersinking.

Another point of note is that the specially designed TiAIN coating ensures higher wear resistance and a high-temperature hardness that guarantees longer tool life for nearly all materials and applications. The standard SpyroTec programme is available in 14 dimensions that range from 6.3mm to 31mm diameter, with a 90° countersink that conforms to DIN 335 form C. SpyroTec is available with a number of shank lengths and, for the purposes of convenience, box sets with a range of diameters are also be offered.

For further details contact Guhring Cutting Tools South Africa on TEL: 087 015 0200 or 041 372 2047 or visit