Mounting Face: Surface Roughness (Ra) 0.8-3.2 μm

Component Specifications

Definition

A mounting face is a critical precision-machined planar surface on a main flange body, designed to provide a stable, flat, and accurately positioned interface for attaching other components, assemblies, or sub-systems. It ensures proper alignment, load distribution, and dimensional stability within a machine assembly, often featuring bolt holes, locating pins, or dowels for secure fastening. Its geometric accuracy (flatness, parallelism, perpendicularity) is essential for maintaining the overall precision and performance of the mechanical system.

Working Principle

The mounting face operates on the principle of providing a geometrically precise and rigid reference plane. When components are bolted or fastened to this surface, it ensures they are correctly aligned relative to the machine's axis or other critical features. This minimizes misalignment, reduces vibration, and distributes mechanical loads evenly, thereby maintaining the integrity and accuracy of the assembly. Its flatness and surface finish prevent distortion and ensure consistent contact pressure across the interface.

Materials

Typically made from high-strength materials such as cast iron (e.g., Grade 250), ductile iron, carbon steel (e.g., AISI 1045), alloy steel (e.g., AISI 4140), or stainless steel (e.g., 304, 316). Selection depends on required strength, wear resistance, corrosion resistance, and thermal stability. Surface hardness may be enhanced through treatments like induction hardening or nitriding to 45-60 HRC.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Hardness	180-300 HB (or as hardened)
Bolt Hole Pattern	As per flange design (e.g., 4x M12 on 150 mm PCD)
Flatness Tolerance	0.01-0.05 mm per 300 mm
Surface Roughness (Ra)	0.8-3.2 μm
Parallelism To Reference	0.02 mm max
Perpendicularity To Axis	0.03 mm max

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 2768-mK, DIN 7168, ISO 1302, DIN 3141

Parent Products

This component is used in the following industrial products

Main Flange Body

The primary structural flange component of a chemical reactor sealing gland assembly.

View Product Details

Engineering Analysis

Risks & Mitigation

Surface wear or scoring leading to misalignment
Corrosion compromising flatness
Improper bolt torque causing distortion
Thermal expansion affecting dimensional stability
Contamination (e.g., chips, debris) on the interface

FMEA Triads

Trigger: Inadequate surface finish or contamination during assembly.
Failure: Poor component alignment, leading to increased vibration, premature wear, or machine inaccuracy.
Mitigation: Implement strict cleaning protocols, specify Ra ≤ 1.6 μm, and use alignment pins or dowels.

Trigger: Insufficient flatness tolerance or machining errors.
Failure: Uneven load distribution, causing stress concentrations, bolt fatigue, or flange cracking.
Mitigation: Apply geometric tolerancing per ISO 1101, use precision grinding or lapping, and conduct flatness verification with dial indicators or CMM.

Trigger: Corrosion due to environmental exposure or incompatible materials.
Failure: Loss of surface integrity, reduced clamping force, and potential seizure of mounted components.
Mitigation: Select corrosion-resistant materials (e.g., stainless steel), apply protective coatings (e.g., zinc plating, paint), or use sealants in humid environments.

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Geometric tolerances per ISO 1101:2017; general tolerances per ISO 2768-mK for linear dimensions and flatness.

Test Method

Flatness tested with precision straightedges and feeler gauges or coordinate measuring machines (CMM); surface roughness measured with profilometers per ISO 4287; hardness verified with Brinell or Rockwell testers.

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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Manufacturers of Mounting Face

Manufacturer profiles associated with Mounting Face.

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Frequently Asked Questions

What is the primary function of a mounting face on a main flange body?

Its primary function is to provide a precise, flat reference surface for attaching other components, ensuring accurate alignment, load distribution, and stability within the machine assembly.

How is flatness tolerance specified for a mounting face?

Flatness tolerance is typically specified per unit length (e.g., 0.02 mm per 300 mm) according to standards like ISO 2768 or DIN 7168, ensuring the surface deviates minimally from a perfect plane.

What materials are commonly used for mounting faces in heavy machinery?

Common materials include cast iron for damping properties, carbon steel for strength, and alloy steel for enhanced wear resistance, often with surface hardening treatments.

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.

Mounting Face