INDUSTRY COMPONENT

Mounting Flange

Mounting flange for precision alignment and secure attachment of bearings in CNC machined aluminum housings.

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Component Specifications

Definition
A mounting flange is a critical interface component in aluminum CNC machined bearing housings, designed to provide precise radial and axial positioning of bearings while ensuring secure mechanical attachment to adjacent structures. It features machined surfaces with tight tolerances for bearing seat alignment, bolt hole patterns for fastening, and often includes sealing surfaces or lubrication channels. This component distributes mechanical loads, maintains bearing preload, and prevents misalignment in rotating machinery applications.
Working Principle
The mounting flange operates by creating a rigid, precisely machined interface between the bearing outer race and the housing structure. It uses mechanical fastening (typically bolts) to apply clamping force, ensuring the bearing remains fixed in its designated position. The flange's geometry controls bearing alignment through reference surfaces, while its stiffness prevents deformation under operational loads. In aluminum housings, it compensates for thermal expansion differences between materials and provides corrosion-resistant mounting points.
Materials
Typically manufactured from 6061-T6 or 7075-T6 aluminum alloy for CNC machined versions, offering high strength-to-weight ratio, excellent machinability, and good corrosion resistance. Alternative materials include cast aluminum alloys (A356) for high-volume production or stainless steel (304/316) for corrosive environments.
Technical Parameters
  • Weight 0.1-2.0 kg (depending on size)
  • Hardness 75-85 HRB for aluminum alloys
  • Bolt Size M6-M12
  • Outer Diameter 50-200 mm (varies by bearing size)
  • Surface Finish Ra 1.6-3.2 μm for bearing seats
  • Bolt Hole Quantity 4-8 holes (typically)
  • Flatness Tolerance 0.02-0.05 mm
  • Bolt Circle Diameter Standardized to bearing housing dimensions
Standards
ISO 1132-1, DIN 5412, ISO 286-2, DIN 718-2

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Mounting Flange.

mounting flange bearing housing flange aluminum flange CNC machined flange bearing mounting precision flange industrial flange mechanical component Mounting Flange in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Aluminum CNC Machined Bearing Housing

Precision aluminum housing for mounting and protecting bearings

View Product Details

Aluminum Die Casting Connector Housing

Aluminum die-cast housing for electrical/electronic connectors

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Polycarbonate Injection Molded Lens Housing

Optical-grade plastic housing for LED lighting and sensor protection.

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Engineering Analysis

Risks & Mitigation
  • Improper bolt torque causing uneven clamping
  • Thermal expansion mismatch with steel bearings
  • Galvanic corrosion when coupled with dissimilar metals
  • Machining errors leading to misalignment
  • Fatigue failure under cyclic loads
FMEA Triads
Trigger: Insufficient bolt torque during assembly
Failure: Bearing loosening and vibration
Mitigation: Use calibrated torque wrenches and follow specified torque values; implement torque verification procedures
Trigger: Thermal expansion differential between aluminum flange and steel bearing
Failure: Bearing preload loss or excessive preload
Mitigation: Design with appropriate clearance/tolerance for thermal expansion; use temperature-stable lubricants
Trigger: Surface corrosion on aluminum flange
Failure: Reduced clamping force and misalignment
Mitigation: Apply protective coatings (anodizing, powder coating); use corrosion-resistant alloys in harsh environments

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Geometric tolerances per ISO 1101:2017; dimensional tolerances per ISO 286-1:2010; typically IT7-IT8 for critical dimensions
Test Method
Dimensional verification using CMM; surface finish measurement with profilometer; flatness testing with optical flats or laser interferometry; hardness testing per ASTM E18

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What is the primary function of a mounting flange in bearing housings?

The primary function is to provide precise alignment and secure mechanical attachment for bearings within the housing, ensuring proper load distribution and preventing misalignment during operation.

Why is aluminum commonly used for CNC machined mounting flanges?

Aluminum offers excellent machinability, good strength-to-weight ratio, corrosion resistance, and thermal conductivity, making it ideal for precision components in bearing housings where weight reduction and heat dissipation are important.

How do mounting flanges prevent bearing misalignment?

Through precisely machined reference surfaces with tight flatness and perpendicularity tolerances, which ensure the bearing outer race seats correctly and maintains alignment under operational loads and thermal cycling.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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