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Mounting Bore Component – Machinery and Equipment Manufacturing

Component Specifications

Definition

A mounting bore is a critical cylindrical feature machined into a precision forged gear blank, typically serving as the primary interface for attaching the gear to a shaft or hub. It ensures proper concentricity, torque transmission, and axial positioning within mechanical power transmission systems. The bore's dimensions, surface finish, and geometric tolerances are precisely controlled to maintain alignment with gear teeth and prevent operational issues like vibration or premature wear.

Working Principle

The mounting bore functions by providing a precise interference or clearance fit with a mating shaft, secured via mechanical fasteners (e.g., keys, splines, or set screws). It transfers rotational forces from the gear teeth to the shaft while maintaining radial and axial alignment through controlled tolerances and surface contact. In operation, it ensures minimal runout and balanced load distribution across the gear-shaft interface.

Materials

Typically matches the gear blank material: alloy steels (e.g., AISI 4140, 4340), carbon steels, or specialty alloys. Hardness ranges from 28-45 HRC post-heat treatment. Surface treatments may include nitriding or carburizing for wear resistance.

Technical Parameters

Depth As per gear width specifications
Roundness ≤ 0.01 mm
Concentricity ≤ 0.02 mm relative to pitch diameter
Surface Finish Ra 1.6 μm or better
Diameter Tolerance H7 or tighter

Standards

ISO 286, DIN 7154, ISO 1101

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Mounting Bore.

Parent Products

This component is used in the following industrial products

Precision Forged Gear Blank

A near-net-shape forged metal blank designed for subsequent gear machining operations.

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Disc Cutters

Rotating disc-shaped cutting tools mounted on a cutterhead for slicing, dicing, or shredding materials.

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Engineering Analysis

Risks & Mitigation

Misalignment causing gear wear
Inadequate fit leading to slippage
Surface defects inducing stress concentrations

FMEA Triads

Trigger: Improper machining tolerances
Failure: Shaft misalignment and excessive vibration
Mitigation: Implement statistical process control (SPC) and regular gauge calibration

Trigger: Material fatigue or corrosion
Failure: Bore deformation or cracking under load
Mitigation: Use corrosion-resistant materials and apply protective coatings

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance

ISO 286 for dimensional tolerances, ISO 1101 for geometric tolerances

Test Method

Coordinate measuring machines (CMM), bore gauges, surface profilometers

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 bore in a gear blank?

It provides a precise interface for attaching the gear to a shaft, ensuring accurate alignment, torque transmission, and minimal vibration in mechanical systems.

How are mounting bores typically secured to shafts?

Common methods include keyways, splines, tapered fits, or set screws, chosen based on torque requirements and assembly/disassembly needs.

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.

Mounting Bore