Gear Heat Treatment Selection Guide: Induction Hardening, Nitriding and Carburizing Compared
Compare carburizing, nitriding and induction hardening for gears, with HRC 58-62, HV 550-900 and HRC 50-55 data plus DIN 6-8 finished gear …
6 min read
Technical Library
PinyiGear technical library — in-depth articles on gear design, gear hobbing, gear grinding, heat treatment (carburizing, nitriding)
82 articles
Gear Hobbing, Shaving and Grinding: DIN Grade Gaps and Cost Comparison
Hobbing holds DIN 7-9, shaving DIN 6-7 before heat treatment, grinding DIN 4-6. Compare DIN grades, Ra values and relative costs to pick the …
5 min read
Gear Oil Selection Guide: ISO VG Grades, λ Film Ratio, and EP Additive Requirements
ISO 12925-1 groups industrial gear oils into CKB, CKC, CKD and CKE by load and duty. Film thickness ratio λ and ISO VG grades guide …
5 min read
Gearbox Order Momentum Returns as Wind Build-Out Picks Up
China added about 80 GW of wind in 2025, reaching roughly 600 GW cumulative, with 16-20 MW turbines raising gearbox and gear grinding …
5 min read
How the Profile Shift Coefficient Governs Gear Strength, Contact Ratio and Sliding
How the profile shift coefficient x balances tooth root strength, contact ratio, and specific sliding, with x = 0.3-0.5 and 15%-25% strength …
8 min read
Interpreting a Gear Inspection Report: Fp, fpt, fα and fβ under ISO 1328-1
ISO 1328-1 gear accuracy grades 0-12 explained, plus how to read Fp, fpt, fα and fβ on an inspection report and what each parameter …
4 min read
Involute Gear Design: Undercut Limits and Contact Ratio Targets
For 20° involute spur gears, under 17 teeth causes undercut; keep contact ratio above 1.2, ideally 1.3-1.6, and use positive profile shift …
5 min read
ISO 1328-2:2020 Gear Accuracy Standards Update
ISO 1328-1:2013 and ISO 1328-2:2020 replace the 1995/1997 editions for gear export acceptance. DIN 4-5, AGMA 15 and GB/T 10095 grades …
5 min read
Matching Case Hardening Depth to Gear Module and Core Hardness
CHD is sized at 0.15-0.25 x normal module: 0.6-0.9 mm for modules up to 2.5 and 1.2-1.8 mm for modules of 5-10, with 20CrMnTi at 58-62 HRC …
5 min read
Selecting Gear Module for a 15 kW, 1450 rpm Drive: ISO 6336 Strength Check with Material Data
How to size a gear module for 15 kW at 1450 rpm using ISO 6336: pinion torque, contact and bending stress, and material data for 20CrMnTi …
7 min read
Carburized and Quenched Transmission Gears: Distortion Management and Process Control
Covers carburizing and quenching of transmission gears, including carbon potential, effective case depth, hardness gradient, and distortion …
4 min read
Carburizing and Quenching of Gears: Controlling Case Depth Uniformity and Distortion
Carburizing and quenching of 20CrMnTi gears at 920-950°C yields HRC 58-62 cases and HRC 30-42 cores, with distortion held to 0.05-0.15 mm.
7 min read
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