Tyrolit
Tyrolit Gear Honing Stones | Superfinishing & Honing for Gear Transmission
Tyrolit Gear Honing Stones are precision abrasive tools designed for the superfinishing and honing of hardened gear tooth flanks after grinding or hard turning, to improve surface finish, reduce noise, and enhance power transmission efficiency. In gear honing, a gear-shaped abrasive tool or honing stone is meshed with the workpiece gear under controlled pressure and oscillation, polishing the tooth flanks to mirror-like finishes and correcting minor errors in lead and profile. Tyrolit gear honing stones are manufactured from ultra-fine aluminium oxide, silicon carbide, and CBN grains in vitrified and resin bonds, formulated to produce consistent, isotropic surface finishes with Ra values below 0.1 µm on high-strength gear steels. The porous, self-sharpening bond structure ensures that the stones cut freely, dissipate heat, and maintain their form across high-volume production. This process is critical in the automotive industry for final finishing of transmission gears, differential ring and pinion sets, and electric vehicle reduction gears, where reduced friction and noise are key performance metrics. Tyrolit’s honing stones are custom-engineered to the tooth form, module, and pressure angle, and are compatible with leading gear honing machine platforms (Gleason, Präwema, Fässler). The outcome is a gear set with reduced transmission error, longer service life, and quieter operation.
Send an Enquiry
We'll get back to you on WhatsApp.
Trusted by Industry Leaders
Ultra-Fine Surface Finish for Noise Reduction
Tyrolit stones impart a plateau-honed surface on tooth flanks that significantly decreases gear whine and rattle, critical for comfort in electric and luxury vehicles.
Custom-Module and Pressure Angle Engineering
Stones are precisely shaped to match the specific involute profile and lead of the workpiece gear, ensuring full flank contact and uniform material removal without distortion.
Self-Sharpening Porous Bond
Advanced vitrified bonds erode microscopically, continuously refreshing the cutting surface and preventing the glazing that can cause workpiece heating and surface smearing.
Compatible with Leading OEM Honing Machines
Tyrolit gear honing tools are manufactured with clamping systems and drive parameters tuned for Gleason, Präwema, and Fässler honing machines, enabling a plug-and-play implementation.
CBN Options for Extended Life in High-Volume Production
CBN honing stones offer exceptional tool life for dedicated gear honing lines, reducing tool change frequency and enabling lights-out manufacturing capabilities.
Process Integration Support
Tyrolit provides the honing stone, dressing technology, and process optimization to achieve target Rz and Rpk surface parameters, ensuring production meets specified quality metrics with minimal scrap.
Why Tyrolit Gear Honing Is the Final Step in World-Class Gear Production
Grinding sets the macro geometry of a gear; honing perfects the micro geometry and surface integrity. Tyrolit’s expertise in both grinding and honing abrasives ensures a seamlessly integrated process. The honing stones can be specified to generate a specific “negative lead” correction to optimize contact pattern under load, reducing stress concentrations. For EV applications, where high RPM and low noise are paramount, Tyrolit honing stones achieve the extremely low surface roughness required to minimize fluid churning losses and prevent scuffing under boundary lubrication conditions. The ability to source both the grinding wheel and honing stone from Tyrolit simplifies quality control and vendor management for transmission manufacturers.
Selecting Honing Parameters and Stone Specifications
Key parameters include stone abrasive type, grit size, and bond hardness, which Tyrolit tailors to the gear steel grade and hardness (typically >58 HRC). The honing cross-hatch angle, oscillation frequency, and pressure are determined in collaboration with Tyrolit application engineers to produce the desired surface bearing area curve. The stones are supplied in matched sets, balanced for even wear, and Tyrolit provides detailed run-in and dressing procedures to maximize tool life and process stability.