Quick Specifications

What Is an HT300 Cast Iron Bearing Housing?

An HT300 cast iron bearing housing is a precision-engineered mechanical component designed to support and accurately position rolling or plain bearings. It provides a rigid mounting structure that absorbs radial and axial loads while maintaining shaft alignment during operation.

Manufactured from HT300 grey cast iron, the housing offers excellent vibration damping, high compressive strength, and outstanding machining performance. These characteristics make HT300 bearing housings suitable for heavy-duty industrial equipment operating under continuous load and harsh working conditions.

Custom bearing housings can be manufactured according to customer drawings, bearing dimensions, shaft configurations, and installation requirements.

Why Choose HT300 Grey Cast Iron?

HT300 is one of the most commonly used materials for industrial bearing housings because it provides an excellent balance between strength, machinability, vibration absorption, and production cost.

Key Advantages

• Excellent vibration damping to reduce machine noise

• High compressive strength for heavy loads

• Stable dimensional accuracy

• Excellent CNC machining performance

• Good wear resistance

• Superior thermal conductivity

• Long service life

• Economical for large-scale production

Compared with ordinary cast iron grades, HT300 provides improved strength and rigidity while maintaining excellent casting performance. It is widely used in machine tools, gearboxes, pumps, compressors, conveyors, and heavy industrial machinery. HT300 is commonly specified for components such as bearing housings, gearbox housings and hydraulic equipment where higher strength than HT250 is required.

Manufacturing Process

Every bearing housing is produced through a controlled manufacturing process to ensure dimensional accuracy and reliable mechanical performance.

Raw Material Inspection

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Pattern Design

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Sand Mold Preparation

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HT300 Molten Iron Pouring

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Cooling

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Shakeout

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Shot Blasting

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Rough Machining

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Stress Relief (Optional)

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Precision CNC Machining

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Drilling & Tapping

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Inspection

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Surface Treatment

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Packing

Our experienced engineering team controls every production stage to guarantee consistent quality and repeatable manufacturing.

Technical Specifications

MetalKeen manufactures OEM bearing housings according to customer drawings.

Typical specifications include:

• Material: HT300 Grey Cast Iron

• Weight: 1 kg – 5000 kg

• Maximum Dimension: Customized

• Machining Accuracy: According to Drawing

• Surface Roughness: Customized

• Hole Tolerance: H7/H8 or Customer Requirement

• Flatness: Customized

• Concentricity: Customized

• Surface Protection: Optional

OEM and ODM manufacturing services are available.

Surface Finish Options

To improve corrosion resistance and product appearance, multiple surface treatment options are available.

Available finishes include:

• Shot Blasting

• Anti-rust Oil

• Industrial Painting

• Powder Coating

• Zinc Coating

• Black Oxide

• Primer Coating

• Customer-specified Finish

The appropriate surface finish depends on the operating environment and customer requirements.

Applications

HT300 cast iron bearing housings are widely used across many industries requiring reliable shaft support and long-term operational stability.

Typical applications include:

• Mining Equipment

• Gearboxes

• Agricultural Machinery

• Construction Machinery

• Pumps

• Compressors

• Conveyors

• Steel Mills

• Paper Machinery

• Cement Plants

• Wind Power Equipment

• Industrial Automation Systems

Why Choose Cast Iron Bearing Housings?

Cast Iron vs Cast Steel Bearing Housing

HT300 cast iron is generally the preferred material when vibration absorption, machining efficiency, and cost-effectiveness are more important than maximum impact resistance.

Quality Inspection

Every bearing housing undergoes strict quality inspection before shipment.

Inspection includes:

• Chemical Composition Analysis

• Dimensional Inspection

• Coordinate Measuring Machine (CMM)

• Hardness Test

• Ultrasonic Testing (Optional)

• Surface Defect Inspection

• Material Certification

• Machining Accuracy Verification

• Appearance Inspection

• Packaging Inspection

Inspection reports can be supplied upon request.

Frequently Asked Questions

What is an HT300 bearing housing?

An HT300 bearing housing is a cast iron component used to support and locate bearings while maintaining shaft alignment and absorbing operating loads.

Why is HT300 used for bearing housings?

HT300 provides excellent vibration damping, high compressive strength, good machinability, and stable dimensional performance, making it ideal for industrial machinery.

Can you manufacture according to drawings?

Yes. MetalKeen provides complete OEM and custom manufacturing services based on customer drawings, CAD files, or samples.

What machining services are available?

We offer CNC milling, turning, boring, drilling, tapping, grinding, and precision machining.

What quality inspections are provided?

Chemical analysis, dimensional inspection, hardness testing, CMM measurement, and material certification are available.

Which industries commonly use bearing housings?

Mining, power transmission, pumps, compressors, construction equipment, agricultural machinery, paper mills, and heavy industrial equipment.

Request a Quote

Looking for a reliable OEM manufacturer of HT300 cast iron bearing housings?

MetalKeen provides complete casting and precision machining solutions for customized bearing housings. Our engineering team supports material selection, casting optimization, CNC machining, quality inspection, and worldwide delivery.

Send us your drawings, specifications, or project requirements today, and we will provide a fast quotation with professional engineering support.