INDUSTRY COMPONENT

Bearing Surface

Precision-machined surface in extrusion dies that supports and guides moving parts under high pressure and temperature.

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Component Specifications

Definition
The bearing surface in extrusion dies is a critical precision-machined interface that provides structural support, alignment, and guidance for moving components during plastic, metal, or composite extrusion processes. It withstands extreme pressures (typically 10-100 MPa), high temperatures (up to 400°C for plastics, higher for metals), and continuous friction while maintaining dimensional stability and surface integrity throughout production cycles.
Working Principle
Operates on tribological principles to minimize friction and wear between moving die components while maintaining precise alignment under load. The surface geometry and finish create controlled clearance zones that manage material flow, prevent leakage, and ensure consistent product dimensions through hydrodynamic or boundary lubrication mechanisms.
Materials
Tool steels (H13, D2, M2), carbide composites (WC-Co), ceramic coatings (TiN, TiAlN, DLC), or specialized alloys (Inconel, Stellite) with hardness 45-65 HRC, surface roughness Ra 0.1-0.8 μm, and thermal stability up to 600°C.
Technical Parameters
  • Hardness 45-65 HRC
  • Surface Finish Ra 0.1-0.8 μm
  • Pressure Rating 10-100 MPa
  • Wear Resistance ≤0.01 mm/1000 cycles
  • Temperature Range -50 to 600°C
  • Flatness Tolerance 0.001-0.01 mm/mm
  • Corrosion Resistance ASTM B117 >500 hours
Standards
ISO 286-2, DIN 7154, ASTM E177, JIS B 0401

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Bearing Surface.

extrusion die bearing surface die components tool steel surfaces precision machining industrial bearings die maintenance surface engineering Bearing Surface Bearing Surface in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Extrusion Die

A precision tool that shapes molten aluminum into specific cross-sectional profiles during extrusion.

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Trunnion Ring

A heavy-duty structural ring that supports and enables the rotation of a Basic Oxygen Furnace vessel.

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Hinge Mechanism

A mechanical assembly that enables the rotational movement of an insulated chamber door while maintaining structural integrity and thermal insulation.

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Engineering Analysis

Risks & Mitigation
  • Surface galling under high pressure
  • Thermal deformation exceeding tolerance
  • Abrasive wear from contaminated materials
  • Corrosion in chemical environments
  • Fatigue cracking from cyclic loading
FMEA Triads
Trigger: Insufficient surface hardness or improper material selection
Failure: Accelerated wear leading to dimensional inaccuracy in extruded products
Mitigation: Specify materials with minimum 50 HRC hardness, apply wear-resistant coatings (TiN, DLC), implement regular hardness testing
Trigger: Thermal expansion mismatch between bearing surface and supporting structure
Failure: Binding or seizure during operation, causing production stoppages
Mitigation: Design with matched thermal expansion coefficients, incorporate thermal barriers, implement temperature monitoring systems
Trigger: Contaminant ingress from feedstock or environment
Failure: Abrasive wear and surface scoring, reducing component lifespan
Mitigation: Install filtration systems, maintain cleanroom conditions where possible, implement regular cleaning protocols

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Geometric tolerances per ISO 2768-mK, surface finish per ISO 1302, dimensional stability within ±0.005 mm under operating conditions
Test Method
Coordinate measuring machines (CMM) for geometry, surface profilometers for roughness, Rockwell hardness testers, thermal cycling tests per ASTM E831

Buyer Feedback

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"The technical documentation for this Bearing Surface is very thorough, especially regarding technical reliability."

"Reliable performance in harsh Machinery and Equipment Manufacturing environments. No issues with the Bearing Surface so far."

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Frequently Asked Questions

What causes premature wear on extrusion die bearing surfaces?

Premature wear typically results from abrasive contaminants in feedstock, inadequate lubrication, misalignment exceeding 0.02 mm, thermal cycling beyond material limits, or surface hardness below 45 HRC for the application.

How often should bearing surfaces be inspected in production?

Inspect every 500-1000 operating hours or during scheduled die maintenance. Critical applications require dimensional checks every 200 hours using precision gauges and surface profilometers.

Can damaged bearing surfaces be repaired?

Minor damage (<0.05 mm depth) can be repaired through precision grinding and re-coating. Severe damage requires complete surface re-machining or component replacement to maintain extrusion tolerances.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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Bearing Journals Bed / Bolster Plate