Why Choose A Hob?

The reasons for choosing honing (honing) over grinding (grinding) are as follows:

Reduce noise characteristics

The microstructure of the tooth surface generated by hobbing is more conducive to reducing the noise of gear transmission.

Avoid the risk of heat damage

The hobbing process eliminates the risk of "burn" (burn) caused by grinding, simplifying quality control and process stability.

Handle complex geometry

Holed gears are suitable for gears with interference profiles (such as a shoulder higher than the root circle), while ground gears may be limited on such workpieces.

Surface performance advantage

The gear can produce compressive residual stress (compressive residual stress) up to 1200 N/mm², which significantly improves the wear resistance of the tooth surface.

Avoid surface defects that cause tooth grinding

Although grinding as an independent process can ensure the geometric accuracy, its surface structure is not optimal for noise reduction; while hobbing can generate a more ideal surface structure.

To sum up, gear grinding has unique advantages in noise reduction, wear resistance, processing complex workpiece and avoiding thermal damage, and is the preferred process under specific working conditions.