Cylindrical gear

straight-toothedsteelground

All of our Hirth Gears are made of a special Chromium-Molybdenum (41xx Series) steel. The gears are rough machined, thermally annealed, semi-finished machined with a roughing of the Hirth Teeth and finally thermally stressed relieved. Rough Grinding of the Surfaces and Hardening of the Teeth The diameters and faces are rough ground using Danobat CNC grinders and the teeth induction hardened to HRc54 ±2 surface hardness. Finish Grinding of the Surfaces The gears are precision ground again on their faces, both inside and outside diameters using Mägerle and Voumard grinders. Final Grinding & Inspection The Hirth teeth are semi-finished ground, unclamped and then re-clamped for a final grind holding extreme accuracies on new Mägerle CNC grinders. Matching Hirth type face gears are ground parallel to 0.0005 mm using Mägerle grinders and inspected on Zeiss coordinate measurement machines. Positive Locking Numerous teeth provide rigid locking allowing for great machining forces to be applied to the gears Self-Centering All of our gears are self-centered providing very low axial and radial run-out.