Flange Face: Diameter Range 50-500 mm

Component Specifications

Definition

The Flange Face is a critical component of a coupling hub, specifically the flat, perpendicular surface that interfaces with a corresponding flange on another shaft or coupling half. It is precisely machined to achieve required flatness and surface finish, ensuring uniform contact pressure distribution when bolted. This component facilitates the transfer of torque while maintaining shaft alignment, minimizing vibration, and preventing premature wear in mechanical power transmission systems.

Working Principle

The Flange Face operates on the principle of creating a rigid, friction-based connection between two rotating elements. When bolted together under specified torque, the mating flange faces create a uniform clamping force that transmits rotational energy through shear stress across the interface. The precision surface ensures maximum contact area, distributing loads evenly to prevent stress concentration and maintain concentricity between connected shafts.

Materials

Typically manufactured from medium-carbon steel (e.g., AISI 1045, 4140) or alloy steel, often heat-treated to achieve hardness of 28-32 HRC. Corrosion-resistant applications may use stainless steel (304/316) or coated carbon steel. Material selection depends on torque requirements, environmental conditions, and compatibility with connected components.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Diameter Range	50-500 mm
Pilot Diameter	Optional for precise alignment
Surface Finish	Ra 3.2 μm or better
Bolt Hole Quantity	4-12 holes (evenly spaced)
Flatness Tolerance	0.05 mm maximum
Bolt Circle Diameter	Standardized per flange size
Maximum Torque Capacity	Varies by size and material

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 9001, DIN 7526, AGMA 9002

Parent Products

This component is used in the following industrial products

Coupling Hub

The central connecting element of a shaft coupling that mounts directly onto the shaft ends to transmit torque between rotating components.

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Flange Housing

A structural component that provides mounting and sealing interface for sight glass assemblies in industrial equipment.

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Engineering Analysis

Risks & Mitigation

Improper bolt torque causing uneven loading
Surface damage from corrosion or impact
Misalignment during assembly
Fatigue failure from cyclic loading

FMEA Triads

Trigger: Insufficient bolt torque during assembly
Failure: Slippage between flange faces, resulting in lost torque transmission and potential catastrophic disconnection
Mitigation: Implement torque verification procedures using calibrated tools; use thread locking compounds where appropriate

Trigger: Corrosion or contamination on mating surfaces
Failure: Reduced friction coefficient leading to slippage, or uneven contact causing vibration and accelerated wear
Mitigation: Apply protective coatings; implement cleaning protocols before assembly; use sealing compounds in corrosive environments

Trigger: Exceeding design torque capacity
Failure: Plastic deformation of flange face, loss of flatness, and potential bolt failure
Mitigation: Install torque limiters or shear pins; conduct regular load monitoring; ensure proper component sizing for application

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Flatness: ±0.05 mm; Parallelism: 0.1 mm per 100 mm diameter; Surface roughness: Ra ≤ 3.2 μm

Test Method

Surface plate inspection with feeler gauges; Coordinate measuring machine (CMM) verification; Surface roughness tester; Dye penetrant testing for cracks

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

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CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Flange Face

Manufacturer profiles associated with Flange Face.

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Frequently Asked Questions

What is the purpose of the pilot diameter on some flange faces?

The pilot diameter provides initial concentric alignment before bolting, ensuring proper mating and reducing assembly time. It helps prevent misalignment that could cause vibration or premature wear.

How does surface finish affect flange face performance?

A smoother surface finish (lower Ra value) improves contact uniformity, reduces fretting corrosion, and enhances torque transmission efficiency. However, excessively smooth surfaces may require higher bolt torque to achieve sufficient friction.

Can damaged flange faces be repaired?

Minor damage can sometimes be repaired by precision machining or lapping, but significant damage usually requires component replacement. Repair must maintain original flatness and dimensional specifications.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

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.

Flange Face