Guangming Group Today Shares: Reducer Gear [Core Basic Parameter List]

Reducer Gear [List of Core Basic Parameters]Parameters are divided into three major categories: mandatory basic geometric parameters, precision & heat treatment parameters, and assembly & installation parameters. Universally applicable for mapping measurement, ordering and spare part replacement, with unified marking standards for spur gears, helical gears and bevel gears.I. Basic Geometric Parameters (Most critical; processing and pairing cannot proceed if any item is missing)1. General Parameters (Spur Gear & Helical Gear)Normal module \(m_n\)

Helical gears adopt normal module as standard. For spur gears, normal module equals transverse module. This parameter determines tooth thickness and load capacity, ranking as the primary parameter.Number of teeth Z

Teeth quantity of driving gear and driven gear, directly defining reduction ratio.

Reduction ratio i = Number of teeth of driven gear ÷ Number of teeth of driving gearNormal pressure angle \(\alpha_n\)

20° for general industrial standards; 25° for a small number of precision gears. Almost all reducers adopt 20°.Face width b

Effective meshing width of gear, affecting load capacity.2. Exclusive Parameters for Helical Gears (Prone to assembly errors!)Helix angle \(\beta\)

Hand of helix: Left-hand / Right-hand

⚠️ A pair of mating helical gears must consist of one left-hand and one right-hand gear. Wrong helix hand leads to complete meshing failure. This is a key point during mapping measurement and procurement!3. Installation Dimensions (Essential for Assembly)Bore diameter d (shaft hole)

Keyway specification: key width × key depth; flat key / spline; angular position of keyway

Hub outer diameter, overall thickness, chamfer, locating shoulder dimensionII. Process & Performance Parameters (For quality differentiation and working condition matching)Accuracy grade (ISO Standard)

General hard-tooth-surface reducer: Grade 7 ~ 8; Precision ground-tooth reducer: Grade 5 ~ 6; Rough hobbing processing: Grade 9Material Grade

45 steel, 40Cr, 42CrMo, 20CrMnTi (mainstream heavy-duty carburized gear material)Heat Treatment Method & Hardness

Soft tooth surface: Quenched and tempered, HB220~260

Hard tooth surface: Carburizing & quenching HRC58~62 / High-frequency quenching HRC48~54 / NitridingMachining process: Gear hobbing, gear shaping, gear grinding, gear shavingIII. Auxiliary Meshing & Working Condition Parameters (For model selection and design)Center distance a: Assembly center distance between large and small gears

Profile shift coefficient x

❗Common oversight in maintenance: Profile shifted gears cannot be directly replaced by standard gears. Forcible assembly results in abnormal backlash and high risk of tooth breakage.Rated torque, maximum allowable rotational speed, maximum impact loadPowder metallurgy, MIM (Metal Injection Molding), powder metallurgy gearsGuangming Group specializes in the R&D and manufacturing of metal forming technology and wear-resistant materials. Our core products cover powder metallurgy parts manufactured via metal compression molding and metal injection molding.The company boasts a high-caliber talent team. The founding team originates from Guangzhou Research Institute of Non-Ferrous Metals, a former ministry-affiliated scientific research institute. Equipped with extensive industrial experience and strong R&D capabilities, the team delivers sustained innovation momentum for corporate development.

The enterprise has obtained 5 invention patents and over 30 utility model patents. We have passed IATF16949 Quality Management System, ISO9001-2015 Quality Management System, ISO14001 Environmental Management System and Intellectual Property Management System certifications, together with international trademark registration.

We are recognized as an Innovative Enterprise of Guangdong Province, Guangzhou Science & Technology Little Giant Enterprise, director unit of Guangdong Powder Metallurgy Industry Technology Innovation Alliance and initiator of Guangzhou Advanced Powder Metallurgy Cluster Promotion Center.