Hard finishing, the accuracy-restoring operation that follows heat treatment, is for external gears a crowded field: generating grinding, profile grinding, and gear honing all compete, and the engineer mostly selects among mature options on cost and quality. For internal gears, the choices are far fewer, and they pull in opposite directions. SkiveFinishing, which Liebherr-Verzahntechnik introduced publicly at EMO Hannover in September 2025, is aimed at that shortfall. To understand why it matters, look first at what makes the internal gear the awkward case.
An excerpt from Gear Technology Solutions by Dr. Hermann J. Stadtfeld covering when and how individual bevel gear members can be replaced during gearbox service without changing the mating gear.
.
20NiMo9-7 alloy achieves up to 48 percent higher fatigue strength than conventional carburizing steels in the as-carburized condition, eliminating the need for shot peening and grinding in automotive gear applications.
.
This paper presents a new analytical method using plate and disk mechanical models to calculate the gear body stiffness of face gear wheels, showing that stiffness decreases toward the outer radius—a behavior that conventional cylindrical gear approaches fail to capture.
.
This article demonstrates why bevel gears are designed with a zero sum of profile shifts—showing that independent shifts merely replicate what a modified pressure angle already achieves—and explains the practical benefits of using conical generating gears for tooth profile crowning.
.
The objective of this paper is to improve the methodology for determining the tooth flank temperature. Two methods are proposed for assessing scuffing risk when applying AGMA 925 for high-speed gears. Both methods provide similar results.
The way to increase production, especially with the largest gears, is to decrease nonproductive time with improved strategies.
Gear inspection has long been a highly specialized, costly investment and an overall challenging part of the gear manufacturing process. Through advances in technology and automation, this typically tedious, time-consuming process is becoming significantly
more efficient as multisensor coordinate measuring machines (CMMs) gain more traction as one of the preferred methods of gear inspection.
Advantages of induction hardening over carburizing, as prepared for the AGMA Metallurgy Committee.
The right hob can make a measurable difference in gear production. Watch the video to see how Star SU combines advanced hob technology with application expertise to help manufacturers get more from every gear cutting operation.
The Intra SFTX twin-spindle single-flank testing system is engineered for advanced gear quality testing and NVH analysis of demanding e-drive gear applications. Combining Transmission Error (TE) and Torsional Acceleration (TA) measurements, it delivers fast, precise diagnostics and detailed order analysis, quickly identifies critical gear issues, enhances traceability, and helps prevent costly defects from reaching end-of-line (EOL) testing.
The 80PS Power Skiving and Hobbing Machine is specifically engineered for power skiving, hobbing, and profile milling of small internal and external gears. Configured specifically for the demands of humanoid robotic gear production, it delivers outstanding performance and process stability for gears used in strain wave, planetary, and cycloidal gearboxes, as well as other high-precision applications of comparable size — even when machining fine-pitch gears and thin-walled components.
Profile modifications on gears often mean additional dressing tools, extra costs, and longer lead times. With DIP (dresser-independent profile modifications), Liebherr has developed a generating grinding method that, for the first time, allows for profile modification during dressing using a profile dressing roll, thereby combining flexibility with short dressing times.
Discover how next-generation bevel gear metrology combines flank form, waviness, surface quality, and root geometry analysis in a single automated inspection cycle. Advanced software and standard probes deliver faster measurements, deeper diagnostics, improved process control, and enhanced gear performance.
Forest City Gear manufactures extremely high-precision gears made for the most advanced robotics, right in Roscoe, IL. This family-owned team of gearheads specialize in high-precision gears engineered to handle the most demanding robotic applications—on Earth, and way beyond.
Ovako has published its Sustainability Report for Financial Year 2025, its second report inspired by the European Sustainability Reporting Standards (ESRS) framework. The report is independently assured by KPMG and presents audited ESG performance data, at a time when many industrial companies are scaling back sustainability commitments in response to cost pressures.
HWR Workholding USA has announced that IMTS 2026 will feature the North American debut of two new products within its INOFlex family of flexible, high-performance 4-jaw chucks. The company will also be showcasing a comprehensive sampling of its full range of workholding solutions for turning and milling applications. Additionally, attendees who visit the company’s Booth #431579 in the West Building will receive a commemorative German-style beer boot pint glass.
In the Surface Roughness, Texture and Tribology webinar series, Dr. Don Cohen will present excerpts from the short course of the same name.
Sep 22, 2026 - Sep 23, 2026
Oct 12, 2026 - Oct 14, 2026
Contact | Privacy Policy
©2026 Power Transmission Engineering
Current Issue
Current Issue
Archives
Subscribe
Buyer's Guide
Cutting Tools Gear Blanks & Raw Material Gear Drives Gear Machines Gear Manufacturing Services Gears Grinding Wheels & Abrasive Tools Heat Treating Inspection Equipment Lubricants Machine Tools Resources Services Software Used Machinery Workholding & ToolholdingThe Gear Industry Buyers Guide is your complete directory of suppliers in the gear industry, including great companies like these.
VIEW ALL