Internal Gear Grinding
2.Material:45#steel,20CrMnTi,40CrNiMo,SAE4340,42CrMo,AISI4140,18CrNiMo7,17CrNiMo6,20CrNiMo,AISI8620,20CrNi2Mo,SAE4320
3.Processing Techniques:Cutting,hobbing,milling,grinding
4.Heat Treatment:Carburising,quenching and tempering,induction hardening
5.Tooth Grinding:Yes
6.Precision Grade:ISO 7-8 Grade
7.Load Capacity:High
8.Applications:Planetary gear reducers,winches,machine tool feed mechanisms,transmission systems for lifting equipment
- Product Description
Internal Gear Grinding Solutions - Precision Manufacturing for Complex Transmission Systems
When you need precision Internal Gear Grinding administrations for your most requesting applications, Henan Yizhi Apparatus conveys enterprise-level arrangements with 15 a long time of fabricating ability. Our completely mechanized equip pounding machines accomplish ISO 7-8 review accuracy with surface hardness extending from 58-62 HRC, supporting module ranges from 0.5 to 50. With conveyance times of 35-60 days and transport harm rates underneath 0.1%, we guarantee your basic components meet the most elevated quality measures for planetary equip reducers, wind turbine gearboxes, and aviation applications.

What is Internal Gear Grinding?
The item speaks to the apex of exactness difficult wrapping up for gears with teeth on the internal circumference. This specialized prepare addresses the interesting challenges of pounding concave tooth profiles where space is restricted and get to is restricted.
Unlike outside equip pounding, this procedure requires modern machine kinematics and specialized tooling. The handle kills warm treatment mutilations whereas accomplishing geometric resiliences that frequently surpass Noise quality lesson 5 standards.
Your transmission frameworks advantage from diminished commotion, progressed stack conveyance, and amplified benefit life. This makes product essential for applications where calm operation and unwavering quality are paramount.
Key Applications and Industries
Electric Vehicle Powertrains
In EV planetary decrease boxes, ground inner ring gears minimize transmission mistake and diminish clamor levels essentially. Without motor clamor concealing, indeed minor adapt blemishes gotten to be capable of being heard to passengers.
Wind Turbine Gearboxes
Multi-megawatt turbines subject planetary organize ring gears to gigantic torque and variable wind loads. Exactness crushing anticipates edge stacking and micropitting in these hard-to-service environments.
Aerospace and Robotics
High-precision consonant drives and compact planetary actuators require zero-backlash execution. Internal Gear Grinding guarantees the situating exactness basic for flight control surfaces and mechanical robots.
Technical Specifications
| Parameter | Specification |
|---|---|
| Number of Teeth | Customized |
| Module Range | 0.5–50 |
| Helix Angle | 5°–45° |
| Surface Hardness | 45-50 HRC, 58–62 HRC |
| Precision Grade | ISO 7-8 Grade |
| Load Capacity | High |
Material Options
We work with a comprehensive extend of materials to meet your particular requirements:
| Steel Grade | Application Focus |
|---|---|
| 45# Steel | General purpose applications |
| 20CrMnTi, 18CrNiMo7 | Carburizing applications |
| 40CrNiMo, SAE4340 | High strength requirements |
| 42CrMo, AISI4140 | Quench and temper applications |
| 17CrNiMo6, 20CrNiMo | Case hardening applications |
| AISI8620, 20CrNi2Mo, SAE4320 | Premium alloy applications |
Our Manufacturing Advantages
Precision Equipment
Our office houses all inclusive driving CNC equip machining centers and completely robotized crushing machines. This gear handles the total handle chain from cutting and hobbing to last crushing operations.
Flexible Production
We acknowledge moo least arrange amounts, counting single-item generation. This adaptability underpins your prototyping needs and specialized applications without requiring expansive bunch commitments.
Quality Assurance
Every component experiences thorough review utilizing arrange measuring machines (CMMs) and metallurgical testing. We confirm profile deviation, helix deviation, and surface wrap up against universal standards.
Heat Treatment Expertise
Our shrewdly warm treatment generation lines bolster carburizing, extinguishing and treating, and acceptance solidifying. This guarantees ideal fabric properties for your particular application requirements.
Quality Control Standards
Our quality control prepare guarantees your components meet the most exacting requirements:
- Geometric Precision: CMM review of profile deviation, helix deviation, and add up to runout per ISO 1328 standards
- Grinding Burn Discovery: Nital Carve testing and Barkhausen Commotion Investigation to identify warm damage
- Surface Wrap up: Ra and Rz estimation to meet tribological requirements
- Twist Control: Confirmation that pounding operations keep up uniform stack distribution

Process Workflow
Your arrange takes after our standardized six-step process:
- Requirement Communication - We talk about your determinations and application requirements
- Design Drawings - Specialized drawings are arranged and approved
- Production Preparing - Fabricating utilizing our accuracy equipment
- Quality Review - Comprehensive testing and verification
- Packaging - Custom defensive bundling with wooden pallets
- Transportation - Multi-channel coordinations with real-time tracking
Frequently Asked Questions
Q: Why is Internal Gear Grinding more expensive than external grinding?
A: The process requires specialized machine kinematics, smaller grinding wheels that fit inside the gear, and more complex dressing cycles due to interference curves.
Q: Can you correct significant heat treat distortion?
A: Yes, with proper stock allowance of 0.15-0.30mm per flank left before heat treatment. This allows us to clean up distortions without compromising case hardening depth.
Q: What about grinding burn risk?
A: We use high-pressure targeted coolant nozzles and CBN wheels to conduct heat away from the workpiece, minimizing thermal damage risk.
Q: Which grinding method do you use?
A: We primarily use profile form grinding for internal gears, as it offers better control over root fillets and profile modifications compared to generating grinding.
Q: How does this affect gearbox noise levels?
A: The product is the most effective method for noise reduction, often lowering gearbox noise by 3-5 decibels by correcting pitch errors and profile waviness.
Contact Us
Ready to discuss your Internal Gear Grinding requirements? Contact our technical team at sales@yizmachinery.com for expert consultation and competitive pricing.











