Percision Hirth Gears
Process & Materials
All of our Hirth Gears are made of a special Chromium-Molybdenum
(41xx Series) steel.
Milling of Teeth
The gears are rough machined, thermally annealed, semi-finished
machined with a roughing of the Hirth Teeth and finally thermally
Grinding of the Teeth
The diameters and faces are rough ground with the teeth being
induction hardened to a RC58 +2 surface hardness using Danobat
Grinding of the Surface
The gears are precision ground again on their faces, both inside
and outside diameters using ELB and Voumard grinders.
Final Grinding & Inspection
The Hirth teeth are semi-finished ground, unclamped and then reclamped
for a final ground holding extreme accuracies on new Magerle CNC
Matching Hirth type face gears are ground parallel to .002mm (.00008")
or better using ELB grinders and inspected on Rank Taylor Hobson
and Sip Mul 300 measurement machines.
Standard indexing of accuracies of +3 arc seconds. Special accuracies
of +1 arc seconds are available upon request.
RESISTANT TO WEAR
Case hardened teeth using chromium-molybdenum steel, make our
gears resistant to wear.
Numerous teeth provide rigid locking allowing for great machining
forces to be applied to the gears.
All of our gears are self-centered providing very low axial and