Today, Guangming Group will introduce the commonly‑used gear types of reducer gearboxes.

Common Gear Types, Characteristics and Application Scenarios of Reducers

1. Helical Cylindrical Gear — [Most‑widely‑used for Enclosed Reducers]

Applications: R, K, S, F four‑series hardened‑tooth gear reducers, conveyors, mixers, fans and water pumps

Shaft layout: Parallel‑shaft input and output

Advantages: Gradual tooth engagement, smooth transmission, low noise, high load‑bearing capacity, suitable for high‑speed and heavy‑duty conditions

Disadvantages: Generates axial force, and bearings need to withstand axial thrust

Reduction ratio: Single‑stage i=1‑6; multi‑stage ratio up to i=6‑400

2. Spur Cylindrical Gear

Applications: Low‑speed general‑purpose reducers, small‑size gearboxes, open‑gear transmissions

Shaft layout: Parallel‑shaft

Advantages: Simple machining, low cost, no axial force

Disadvantages: Heavy impact, high noise, not suitable for high‑speed operation

Peripheral speed: ≤5m/s generally

3. Bevel Gear (Straight‑Bevel Gear / Spiral Bevel Gear)

Applications: Right‑angle output reducers, K‑series reducers, steering transmissions

Shaft layout: Two shafts intersect at 90° (vertical transmission)

Straight‑bevel gear: For low‑speed operation with high noise; Spiral bevel gear: Smooth transmission and higher load capacity

4. Planetary Gear (Planetary Gear Train)

Components: Sun gear + Planet gear + Internal ring gear + Planet carrier

Applications: Servo planetary reducers, robots, winches, small‑sized high‑precision reducers

Shaft layout: Coaxial input and output

Advantages: Compact size, high torque, coaxial design, high precision and low backlash

Reduction ratio: Single‑stage i=3‑10; two‑stage i=10‑100

5. Worm‑and‑Worm‑gear Pair

Applications: Worm‑gear reducers (WP, WPA series)

Shaft layout: 90° crossed shafts

Advantages: Large single‑stage reduction ratio i=10‑80; self‑locking capability (worm drives worm gear, reverse‑drive locked); quiet operation

Disadvantages: Low transmission efficiency, high heat generation, vulnerable worm‑gear wear, unsuitable for long‑term continuous high‑power operation

6. Herringbone Gear (Double‑helical Gear)

Applications: High‑power heavy‑duty reducers, heavy‑load equipment for mining, metallurgy and cement industries

Equivalent to a pair of oppositely‑oriented helical gears; axial forces counteract each other

Advantages: Capable of ultra‑high‑power, heavy‑load and high‑speed transmission

Disadvantages: High machining difficulty and production cost

7. Internal Gear (Internal Ring Gear)

Rarely used independently; mainly applied in planetary reducers as a fixed ring gear.

Powder Metallurgy, Metal Injection Molding, Powder Metallurgy Gears

Guangming Group specializes in the R&D and manufacturing of metal forming technologies and wear‑resistant materials. Our main products cover powder‑metallurgy parts produced by metal compaction forming and metal injection molding.

The company boasts a high‑caliber talent team. Its founding team comes from Guangzhou Research Institute of Non‑Ferrous Metals, a ministry‑affiliated scientific research institute in China. With rich industrial experience and strong R&D capabilities, the team delivers sustained innovation momentum for enterprise development.

Up to now, our group has obtained 5 invention patents and more than 30 utility‑model patents. We have passed the certification of IATF16949 Quality Management System, ISO9001‑2015 Quality Management System, ISO14001 Environmental Management System and Intellectual Property Management System, and obtained international trademark certification.

We are recognized as an Innovative Enterprise of Guangdong Province, a Little‑Giant Sci‑Tech Enterprise of Guangzhou, a director‑unit of Guangdong Powder‑Metallurgy Industry‑Technology Innovation Alliance, and a founding member of Guangzhou Advanced Powder‑Metallurgy Cluster Promotion Center.