Rolling Mill Scrap Shear Wear Bushing

The Rolling Mill Scrap Shear Wear Bushing is a heavy-duty, precision-engineered metallurgical component. As a critical Crop Shear Guide Part, it is designed to guide, align, and withstand extreme mechanical stress and frictional wear during high-speed shearing and cropping of metal scraps, bars, and plates in continuous rolling mill lines.

 

 

1: Bushing Specifications: 

 

Overall Length: 250 mm (precision-controlled to ensure exact fitment within the shear assembly).

 

Outer Diameters (OD): Stepped outer profile featuring a primary maximum diameter of Ø81.2 mm and a transition diameter of Ø75.5 mm.

 

Inner Diameters / Bores (ID): Dual-stepped inner bore configurations measuring Ø65.5 mm and Ø40 mm to accommodate internal shafts or guide components.

 

Surface Roughness: Maintained at precision levels of Ra 3.2 µm, ensuring smooth guidance and minimal frictional resistance.

 

Hardness Performance: Heat-treated to a strict requirement of 40–45 HRC, delivering exceptional impact and wear resistance.

 

2: Material

 

Material Grade: 1.2094 / Stainless Alloy Steel (Equivalent to 2Cr13).

 

Characteristics: The material undergoes advanced refining processes (Electric Furnace + AOD/VOD + LF). With a controlled Chromium (Cr) content of roughly 12.17% – 12.44% and balanced carbon composition, this martensitic stainless/alloy steel provides an optimal combination of high tensile strength, superior hardenability, and reliable corrosion/wear resistance in harsh mill environments.

 

3: Drawing Technical Details & Production Process

 

 

1: Drawing technical Details:

The component features complex technical geometry, including specialized angular chamfers, precision internal/external angles, and multiple smooth radii features (R1 and R100) designed to prevent stress concentrations.

 

2: Production process:

 

Raw Material Sourcing & Melting: High-purity steel melted via EF+AOD/VOD+LF.

 

Forging & Rough Machining: Forming the tubular blank and initial turning.

 

Precision CNC Machining: Executing strict dimensional tolerances, stepped bores, and complex profile radii.

 

Heat Treatment: Professional quenching and tempering to lock in the target hardness range (40–45 HRC).

 

Quality Inspection: Rigorous multi-point testing covering dimensions, surface roughness (Ra 3.2), and hardness verification prior to factory shipment.

 

4: Applications & Advantages

 

1: Main Industrial Applications:

Widely installed in metallurgical plants, steel works, and hot rolling mills-specifically positioned within scrap shear and crop shear systems (such as pre-G21/G23 guide groups) to handle heavy shearing tasks.

 

2: Advantages:

 

Superior Wear Resistance: High surface hardness prevents premature groove formation and abrasive wear under continuous friction.

 

High Structural Integrity: Excellent resistance to thermal and mechanical fatigue during high-impact metal cutting.

 

Exact Dimensional Interchangeability: Fully complies with OEM drawings, ensuring seamless drop-in replacement, reducing equipment downtime, and extending maintenance intervals.

 

We specialize in custom manufacturing high-performance metallurgical spare parts and precision wear components tailored to your exact drawings and specifications. Welcome to consult. Thank you.

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