Automotive Transmission

It seems counter-intuitive, but for carbide tools at high speeds, coolant is often detrimental. The rapid heating (in the cut) and cooling (out of the cut) causes “Thermal Shock,” leading to micro-cracks on the cutting edge. K-Series Dry Hobs eliminate this cycle. The Alcrona Pro coating insulates the tool, forcing the heat into the chips, resulting in longer, more predictable tool life.

Speed. Shaping is a reciprocating process (up-and-down), which has idle return strokes. Power Skiving is a continuous rotary process. For a typical stepped planet gear, our W-Series Skiving Cutter can be 3 to 5 times faster than a shaper cutter, which is critical for meeting the high-volume demands of the automotive industry.

Generally, No. Grinding produces a chaotic surface texture which is quieter, while hobbing produces a structured feed mark. However, G-Series Hard Hobbing can achieve DIN 6-7 quality, which is perfectly adequate for reverse gears, truck transmissions, or auxiliary gears where the absolute lowest NVH levels are not the primary requirement, offering massive cost savings.

We recommend W-Series for materials up to HRC

Consistency comes from the substrate. We don't mix batches. Our K-Series uses premium sub-micron carbide from a single German source (Konrad Friedrichs). Combined with our automated edge preparation and coating process, we ensure that “Hob #1” performs exactly the same as “Hob #100,” allowing you to maintain stable CpK values on your production line.

Yes. Most EV gears are ground or honed after heat treatment. Our K-Series hobs are designed with Protuberance to undercut the root. This ensures the finishing tool (grinding wheel or honing stone) only touches the active flank, preventing stress risers in the root fillet, which is vital for the fatigue life of high-torque EV gears.

We standardise on Oerlikon Balzers Alcrona Pro (AlCrN) for our K-Series. It has a high oxidation temperature and excellent hot hardness. For extreme applications, we also offer Altensa , which allows for even higher cutting speeds, further reducing cycle time.

Yes. Automotive gears require perfect deburring to prevent damage during heat treatment. We supply Chamfer Hobs that can be mounted on the same arbor as the cutting hob (in compatible machines) to deburr the gear integrated into the hobbing cycle.