Product Overview

The machined large ring gear for a mixer is a critical power transmission component engineered for heavy-duty industrial mixing applications. As a large diameter ring gear designed specifically for mixer drives, this external ring gear transmits torque and rotational motion from the pinion to the mixer drum, enabling efficient and reliable mixing operations across cement, mining, chemical, and metallurgical industries.

Large ring gears offer significant advantages over gearless transmission systems, including lower initial cost, simpler installation procedures, and reduced operating and maintenance expenses. Our custom large ring gears are precision-machined to exacting specifications, ensuring optimal gear meshing, minimal backlash, and extended service life even under the most demanding operating conditions.

Key Specifications

Parameter	Specification
Outer Diameter (OD)	Up to 13,000 mm (one-piece); up to 16,000 mm (assembled)
Module Range	10–60 (hobbing); up to M200
Tooth Profile	Spur gear, helical gear, herringbone
Material	Carbon steel (C45E, 1045), alloy steel (42CrMo4, 34CrNiMo6, 35CrMo, 42CrMo)
Heat Treatment	Quenching & Tempering, Induction Hardening, Carburizing & Quenching, Normalizing
Precision Grade	Grinding: ISO Grade 5–7; Hobbing: ISO Grade 8–9
Weight	10–35 tons (customizable)
Standard	DIN, JIS, AGMA, ISO/GB
Tolerance	Up to ±0.01mm

Manufacturing Process

Our large ring gear machining process follows a rigorous, multi-stage workflow to ensure dimensional accuracy, metallurgical integrity, and surface quality:

Raw Material Inspection – 100% ultrasonic testing (UT) per ASTM A388 or SEP 1921 to verify material integrity
Blank Production – Casting or forging to create the gear blank
Normalizing/Tempering Heat Treatment – Optimizes grain structure and relieves internal stresses
Rough Machining – Initial turning and boring on large-scale CNC vertical lathes and boring mills
Rough Tooth Opening – Preliminary gear tooth cutting
Quenching & Tempering – Enhances hardness, wear resistance, and impact strength
Semi-Finishing – Intermediate machining operations
Precision Gear Cutting – Hobbing, milling, or gear shaping using state-of-the-art CNC machines
Induction Hardening – Surface hardening of tooth flanks to achieve uniform hardness without soft zones
Finish Machining – Precision grinding of inner diameter, flat surfaces, and tooth profiles
Final Inspection – Dimensional inspection, hardness testing, magnetic particle testing (MT), and ultrasonic testing (UT)
Anti-Rust Treatment & Packing – Corrosion protection and sea-worthy wooden case packaging

Why Choose Our Machined Large Ring Gears?

Exceptional Load-Bearing Capacity

Our large ring gears are manufactured from high-grade alloy and carbon steels, specifically selected for their strength, toughness, and wear resistance. The combination of premium materials and precision heat treatment ensures superior load-carrying capability under high-torque mixer operations.

Precision Gear Cutting Technology

We employ state-of-the-art gear hobbing and CNC machining equipment capable of handling large diameters with exceptional accuracy. Our finishing capabilities include gear grinding achieving ISO Grade 5–7 precision, ensuring smooth gear meshing, reduced noise, and extended gear life.

Advanced Heat Treatment

Our proprietary heat treatment processes-including quenching and tempering, induction hardening, and carburizing-optimize the gear ring structure to enhance surface hardness, wear resistance, and impact resistance. Induction hardening delivers uniform hardness across the entire ring without seams or soft zones.

Custom Engineering Support

We provide full-service engineering from concept to delivery. Our team works closely with clients to optimize gear geometry, material selection, and manufacturing strategy for specific mixer applications. Whether you need spur gears, helical gears, or herringbone gears, we deliver custom solutions tailored to your requirements.

Large-Scale Manufacturing Capability

With an expansive manufacturing facility exceeding 10,000 square meters, we possess the capacity to produce large diameter ring gears up to 13,000 mm OD in one piece and 16,000 mm in assembled configuration. Our equipment includes large CNC vertical lathes, floor-type boring mills, gantry-type milling machines, and advanced gear hobbing machines.

Rigorous Quality Control

Every machined ring gear undergoes 100% inspection including UT, MT, dimensional checks, and hardness testing. Our ISO 9001:2015 certified quality system ensures consistent quality and full traceability.

Competitive Lead Times

With streamlined production processes and extensive manufacturing capacity, we offer competitive delivery schedules without compromising quality. Our minimum order quantity is 1 piece, accommodating both prototype and volume production requirements.

Global Export Experience

We have successfully exported our large ring gears for mixers to more than 20 countries worldwide. Our packaging meets international sea-worthy standards, ensuring safe delivery to any global destination.

Products Description

Material Grade	Equivalent Standards	Application
C45 / CK45	BS C45, ASTM 1045, DIN C45	General purpose carbon steel gear rings
42CrMo4	BS 708M40, ASTM 4140, DIN 42CrMo4	High-strength alloy steel for heavy loads
34CrNiMo6	DIN 34CrNiMo6	High-toughness alloy steel for extreme conditions
35CrMo	ASTM 4135	Medium-alloy steel for quenched and tempered gears
20CrMnTi	–	Carburizing steel for case-hardened gears
16MnCr5	DIN 16MnCr5	Case-hardening steel

Contact Us

Looking for a custom machined large ring gear for your mixer? We are ready to discuss your specific requirements. Please provide your drawings, specifications, and application details for a tailored solution.