Gear Hobbing: Principles, Parameters & Precision
Gear hobbing principles, cutting parameters, and precision control, covering hob-workpiece synchronous rotation and DIN 6-8 accuracy to ISO
5 min read
Technical Library
PinyiGear technical library — in-depth articles on gear design, gear hobbing, gear grinding, heat treatment (carburizing, nitriding)
82 articles
Gear Material Choice and Distortion Management in Heat Treatment
Compare 20CrMnTi, 42CrMo, 20CrMo and 20CrNi2Mo gear steels with carburizing and Q&T data, plus heat treatment deformation control notes.
6 min read
Gear Material Selection: Case Hardening Steel Compared with Through-Hardening Steel
Compare case hardening vs through-hardening gear steels, including 20CrMnTi and 40Cr, load capacity, wear resistance, and material selection …
4 min read
Gear Material Selection: Decision Framework from 20CrMnTi to 42CrMo
Compare 20CrMnTi carburizing steel, 42CrMo quenched and tempered steel, and 40Cr by surface hardness, core toughness, and heat-treatment …
9 min read
Gear Materials and Heat Treatment: Material Selection and Carburizing Practice
Covers gear material grades like 20CrMnTi and 42CrMo, hardness ranges, and the carburizing process route from forging to final machining.
7 min read
Gear Module Selection: Classification & Pressure Angle
Module m = d/z, the most fundamental gear parameter. Covers gear classification and selection for spur, helical, bevel, worm and planetary …
7 min read
Gear Precision Inspection: ISO 1328 vs AGMA 2015 Guide
Compare ISO 1328:2013 and AGMA 2015 gear accuracy standards, tolerance grades, and inspection items to choose the right precision grade for …
12 min read
Helical Gears vs Spur Gears: Design, Efficiency and Selection Guide
Compare helical and spur gears: tooth trace direction, contact ratio of 2.0-3.0 vs 1.2-1.8, plus design, machining at DIN 6-8 and M0.5-M12.
8 min read
Helical vs Spur Gears: Noise, Load and Selection Guide
Compare helical and spur gears for noise, load capacity and smoothness. Covers helix angles of 15°–30°, contact ratios, vibration and …
4 min read
ISO 1328 Gear Accuracy Grades: Selection, Inspection and Cost Trade-offs
Covers ISO 1328 gear accuracy grades 0-12, common grades 5-8, single-index parameters, and how grade choice affects noise, service life, and …
4 min read
ISO 1328:2013 Gear Accuracy: Classification, Measurement and Shop-Floor Control
ISO 1328-1:2013 gear accuracy grades 0-12, covering pitch, profile and helix deviations plus practical inspection and SPC methods for batch …
5 min read
Managing Carburizing and Quenching Distortion in Gears: An Engineering Field Guide
Learn how carbon content 0.17%~0.23%, case depth 0.6~1.2mm, and quenching at 820~860°C control gear bore shrinkage within 0.02~0.08mm.
5 min read
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