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Help CenterSplit Ring Gear 18MnCr5 Carburized Depth 0.8-1.2mm 320HB Core Hardness
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Henan San Kuang Machinery Technology Co., Ltd. (established in 2014) offers premium Split Ring Gears in 18MnCr5 alloy steel with precisely controlled carburized depth of 0.8-1.2 mm and a consistent core hardness of 320 HB. Our factory covers 10,000-30,000 square meters and employs 51-100 skilled workers, ensuring rigorous quality control. With an annual export value of US$2.5–5 million and shipments from major Chinese ports (Shanghai, Qingdao, Tianjin, Lianyungang), we deliver reliable power transmission components to global markets including North America, Europe, Southeast Asia, and the Middle East.
Our split ring gears are engineered for high torque applications where wear resistance and toughness are critical. The combination of 18MnCr5 material, case hardening, and a 320 HB core provides excellent fatigue life and dimensional stability. Below we detail the key technical features and benefits.
Key Features & Technical Specifications
- Material: 18MnCr5 (DIN 1.7131) – a low-carbon alloy steel with good hardenability and core toughness after carburizing.
- Carburizing Depth: 0.8–1.2 mm (customizable to ±0.1 mm tolerance) – ensures a wear-resistant surface while maintaining ductile core.
- Core Hardness: 320 HB (approx. 34 HRC) – provides sufficient strength to support the hardened case without brittleness.
- Surface Hardness: Typically 58–62 HRC after quenching and tempering – delivers high abrasion resistance for long service life.
- Precision Machining: Teeth profile can be cut to AGMA/ISO accuracy grades (e.g., Grade 6–8).
- Customization: Bore diameter, outer diameter, module, number of teeth, and keyway can be tailored to your design. Split design allows easy installation and maintenance.
- Heat Treatment Process: Carburizing → Quenching (oil or polymer) → Tempering → Shot peening (optional) for improved residual stress distribution.
Typical Mechanical Properties (18MnCr5 after carburizing & hardening)
| Property | Value | Remark |
|---|---|---|
| Tensile Strength | 800–1050 MPa | After heat treatment |
| Yield Strength | ≥650 MPa | Core property |
| Surface Hardness | 58–62 HRC | Case hardness |
| Core Hardness | 320 HB (≈34 HRC) | As specified |
| Case Depth (effective) | 0.8–1.2 mm | HV1 hardness gradient test |
| Impact Toughness (Charpy V-notch) | ≥30 J (core) | At room temperature |
Customer Benefits:
- Longer service life: The carburized case resists pitting and wear in abrasive environments, reducing downtime.
- Reliable torque transmission: The tough core (320 HB) prevents tooth breakage under shock loads.
- Easy assembly: Split ring design allows installation without removing shafts or other components – ideal for confined spaces.
- Cost-effective: 18MnCr5 offers an excellent balance between performance and material cost.
- Customizable: We can adjust case depth, hardness profile, and final machining to match your application requirements.
Trust & Quality Assurance
Henan San Kuang Machinery Technology Co., Ltd. is a certified manufacturer with multiple quality management systems including ISO9001, TS16969, HACCP, SA8000, and others. Our factory has been serving global customers since 2014, exporting to over 15 countries and regions. We strictly follow ISO10441 and ISO19011:2000 guidelines for process control. Each split ring gear undergoes dimensional inspection, hardness testing (surface & core), and case depth verification. We offer 100% non-destructive testing (UT/MT) upon request. With a dedicated engineering team, we support your project from prototype to mass production. Contact us today for a quote or technical discussion.
Frequently Asked Questions
-
What is the typical lead time for a custom split ring gear?
Standard lead time is 30–45 days after drawing approval. For urgent orders, expedited services are available. -
Can you supply gears with different case depths? (e.g., 0.5–0.8 mm or 1.2–1.5 mm)
Yes, we can adjust carburizing parameters to achieve any case depth within 0.5–2.0 mm, subject to material and geometry. -
How do you ensure the 0.8–1.2 mm case depth and 320 HB core?
We use calibrated carburizing furnaces with carbon potential control. Case depth is verified by microhardness traverse testing (HV1), and core hardness is measured on cut sections. -
What surface treatment options do you offer besides carburizing?
We offer nitriding, induction hardening (for localized areas), shot peening, and phosphating or black oxide coating for corrosion resistance. -
Do you provide split ring gears with a pre-assembled split feature?
Yes, we can machine the split (cut) and provide matching dowel pin holes for precise alignment upon reassembly. -
What packaging do you use for export?
Each gear is individually wrapped in rust-proof paper, then placed in wooden crates with internal bracing to prevent movement during shipping. -
Can you supply the material certificate?
Yes, we provide a mill test certificate for 18MnCr5 material and a heat treatment report upon request. -
Is the 320 HB core hardness measured across the entire section?
The 320 HB refers to the average core hardness at the tooth root area. We can supply hardness distribution data if needed.
Ready to order? Send us your drawings or specifications, and we will provide a competitive price with fast delivery. Our team has over a decade of experience in gear manufacturing – trust us to deliver split ring gears that meet the most demanding requirements.
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