Product Details

A special steel enterprise specializing in the production, research and development and sales of high alloy steel forgings

Gear Ring / Slewing Ring Forging

Key words:

Classification:

Gear Shaft & Ring Forging

Hotline:

Product Name: Ring Gear / Annular Gear

Product Description: A circular gear component with teeth on outer/inner diameter, used to mesh with other gears for torque transmission, speed adjustment and direction change. Core part for planetary gearboxes, automotive differentials and heavy machinery.

1. Classification

By Tooth Direction: Spur ring gear, Helical ring gear, Herringbone ring gear
By Meshing Type: External ring gear, Internal ring gear (core of planetary drive)
By Tooth Profile: Involute (universal), Circular/hypoid (for automotive differential), Face gear (for indexing)

2. Key Technical Parameters

Parameter	Specification
Module (m)	0.5 – 30+ (larger for heavy load)
Number of Teeth (z)	Internal ring gear: ≥ 50; External ring gear: Customizable
Pressure Angle (α)	Standard: 20°; Heavy load: 25°
Helix Angle (β)	8° – 20° (for helical ring gear)
Accuracy Grade (GB/T 10095)	Precision: 5–7 Grade; General use: 8–9 Grade
Surface Hardness	HRC 58 – 62 (after heat treatment)

3. Materials

Carbon/Alloy Steel: 45#, 40Cr, 42CrMo, 20CrMnTi (carburizing and quenching, high strength & wear-resistant)
Cast Steel/Ductile Iron: ZG45, QT500-7 (low cost, good vibration absorption)
Special Materials: Stainless steel (anti-corrosion), Powder metallurgy (lightweight), Engineering plastics (light load & quiet)

4. Manufacturing Processes

Forging → Turning → Hobbing/Shaping (external/internal teeth) → Heat Treatment (quenching, tempering, carburizing) → Finishing (gear grinding, honing)

5. Core Features

Compact structure: Hollow design, space-saving
High load capacity: Large contact area in internal meshing
Wide transmission ratio: Single-stage ratio i=3–100+
Smooth operation: Low noise and vibration
Long service life: High-quality materials & precision machining

6. Main Applications

Automotive (differential, transmission, starter), Industrial (planetary gearboxes, slewing bearings, machine tools), Heavy machinery (excavators, mining equipment, rolling mills), Aerospace (radar, satellite antennas)

7. Maintenance Tips