DIN 3967 Backlash Groups and How Gear Grinding Fits In
DIN 3967 marks tooth thickness tolerance as number 21-30 plus letter a-h; the h zone gives the smallest backlash.
6 min read
Technical Library
PinyiGear technical library — in-depth articles on gear design, gear hobbing, gear grinding, heat treatment (carburizing, nitriding)
82 articles
Exporting Precision Gears: Trade Terms, Standards, Materials and Inspection
Export gear orders need DIN/ISO/AGMA grade alignment, AISI steel grades, and reports listing Fp, fpt, Fα, Fβ, Fr; PinyiGear grinds to DIN …
5 min read
From Drawing to Qualified Gears: How PinyiGear Runs Custom Gear Projects for High-End Equipment OEMs
From drawing review to shipment: material advice (20CrMnTi, 42CrMo4), process routes and inspection for fine-module, odd-tooth custom gears. …
8 min read
Gear Manufacturing for Wind Turbines: Engineering for Two Decades of Operation
Wind turbine gearbox market hit USD 9.24B in 2026, up 11.7% YoY. Gears face 20 years of alternating load: DIN 5-6 accuracy, 58-62 HRC, …
5 min read
Gear Tooth Machining Route Selection: Comparing Hobbing, Shaping, Shaving and Grinding
Compare hobbing, shaping, shaving and grinding by accuracy grade, allowance and process sequence, from GB 6~7 hobbing to DIN 4-5 form …
9 min read
PinyiGear Engineering Guide — Reference for Gear Strength Calculations
ISO 6336 contact and root bending formulas with GB/T 3480, DIN 3990 and AGMA 2001: 20CrMnTi at HRC 58~62 gives σHlim 1500 MPa and σFlim 500 …
8 min read
Robot Joint Reducer Gearing: Backlash Control, Repeatable Lots, and Carburized Case Depth
Robot joint reducers demand low-backlash, consistent gears. PinyiGear holds DIN/ISO 4-5 in volume, grade 3 ground. 20CrMnTi carburized to …
5 min read
Robot Reducer Supply Chain 2026: Where Gear Suppliers Can Compete
China's robot reducer market hits RMB 4.7bn in 2026 as planetary share climbs to 22.92% and margins fall; where gear suppliers can hold …
5 min read
Comparing Gear Steels: 20CrMnTi, 40Cr, 42CrMo and 17CrNiMo6
Pick the heat treatment route first, then the steel grade. Covers 40Cr and 42CrMo quench-and-tempered gears, carburized 20CrMnTi, and …
5 min read
Form Grinding vs Generating Grinding: How Gear Grinding Achieves ISO Grade 5
Gear grinding after heat treatment reaches ISO 1328-1 Grade 5 with fα ≤ 5 μm and Ra 0.2–0.8 μm. Compare form and generating grinding by …
5 min read
Four Fixes for Gear Wear and Lubrication Practice
Most gear failures are lubrication faults, not design faults. Use ISO VG 150~320 in enclosed boxes, VG 68~150 at high speed, VG 320~680 for …
2 min read
Gear Failure Analysis: Pitting, Scuffing, Wear and Tooth Breakage — Stress Data and Corrective Measures
Gear damage falls into four modes: pitting, scuffing, abrasive wear and tooth breakage. See stress data, GB/T 3480 strength checks and …
6 min read
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- Room 102, No.24 Houhu Road (Humen Section), Humen Town, Dongguan, Guangdong, China
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