The concrete mixer drum support ring from Ningbo Ruican is a structural component that carries the full weight of a rotating concrete mixer drum on transit mixer trucks. Mounted around the drum’s circumference, this ring rides on the mixer frame’s support rollers, transferring drum weight and dynamic loads from mixing rotation, vehicle acceleration, and road shock into the chassis. Given the abrasive concrete environment, continuous rotation, and high radial loads, the support ring demands exceptional wear resistance, dimensional roundness, and fatigue strength.
Ningbo Ruican manufactures mixer drum support rings using investment cast segments in ZG35CrMo alloy steel, followed by precision CNC MACHINING and rolling to achieve the roundness and roller contact surface finish required for smooth, low-vibration drum rotation. Hardened and tempered to 240–290 HB, the ring’s working surface delivers extended service life even under continuous-duty commercial batching and transit operations.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Name | Concrete Mixer Drum Support Ring |
| Material | ZG35CrMo Alloy Steel Casting |
| Manufacturing Process | Investment Casting (Lost Wax) + CNC Rolling & Machining |
| Diameter Range | 1,500 – 2,400 mm |
| Cross-Section | 40 × 60 mm to 70 × 100 mm (customizable) |
| Tensile Strength | ≥ 685 MPa (hardened & tempered) |
| Yield Strength | ≥ 490 MPa |
| Hardness | 240–290 HB (working surface) |
| Roundness Tolerance | ≤ 2 mm full indicator |
| Roller Contact Surface | CNC turned, Ra 3.2 μm |
| Heat Treatment | Quench + Temper |
| Surface Treatment | Shot blast + anti-rust coating |
Key Features
- High Load-Bearing Capacity: ZG35CrMo alloy steel handles drum weights up to 20+ tons of concrete per load
- Precision Roundness: CNC rolled and machined to ≤2 mm roundness for vibration-free rotation
- Wear-Resistant Surface: Hardened working surface (240–290 HB) extends roller contact life
- Custom Diameter Range: Manufactured to fit 3 m³ to 16 m³ transit mixer drums
Quality Assurance
- Chemical composition and mechanical property testing per heat
- Hardness verification on finished rings
- Roundness and runout inspection on dedicated fixtures
- UT examination for internal soundness on request
- IATF 16949 certified quality system
Applications
Transit mixer trucks (3–16 m³), stationary mixers, self-loading mobile mixers, and aggregate processing drums.
Why Choose Ningbo Ruican?
- Heavy-section casting expertise with strict solidification control
- Integrated casting + rolling + machining capability
- DFM (Design for Manufacturing) review at quotation stage
- Reliable export logistics to 30+ countries
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