Mounting Hub/Bore: Hub Diameter 20-150 mm, Length 15-120 mm

Component Specifications

Definition

A mounting hub/bore is a cylindrical mechanical interface component designed to connect rotating cam elements to shafts or other driven components in cam mechanisms. It features precise internal bore dimensions for shaft fitting and external hub geometry for cam attachment, ensuring accurate torque transmission and rotational alignment while maintaining structural integrity under cyclic loading conditions.

Working Principle

The mounting hub/bore operates on mechanical interference and friction principles, where the bore creates a press-fit or keyed connection with the shaft, while the hub provides mounting surfaces for cam elements. This dual-interface design ensures synchronized rotation between cam and shaft, transmitting motion and force while maintaining precise angular positioning through geometric constraints and surface contact mechanics.

Materials

Typically manufactured from alloy steels (AISI 4140, 4340), stainless steels (304, 316), or aluminum alloys (6061-T6) with hardness ranging from 28-45 HRC for steel components. Surface treatments may include nitriding, carburizing, or chrome plating for wear resistance.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Length	15-120 mm
Hub Diameter	20-150 mm
Bore Diameter	10-100 mm
Concentricity	0.01-0.05 mm
Surface Finish	Ra 0.8-3.2 μm
Tolerance Class	IT6-IT7
Runout Tolerance	0.02-0.1 mm

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 286, DIN 7154, ISO 1101, DIN 7184

Parent Products

This component is used in the following industrial products

Cam Mechanism

A mechanical component that converts rotational motion into linear motion or vice versa within a locking system.

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Engineering Analysis

Risks & Mitigation

Concentricity deviation causing vibration
Fatigue failure from cyclic loading
Wear at bore-shaft interface
Improper fit leading to slippage
Corrosion in harsh environments

FMEA Triads

Trigger: Inadequate interference fit or improper installation
Failure: Slippage between hub and shaft leading to timing errors
Mitigation: Implement precise tolerance control, use proper installation tools, and verify fit with go/no-go gauges

Trigger: Material fatigue from cyclic loading
Failure: Crack propagation leading to catastrophic failure
Mitigation: Use fatigue-resistant materials, apply surface treatments, and implement regular inspection protocols

Trigger: Misalignment during assembly
Failure: Excessive vibration and premature bearing wear
Mitigation: Use alignment tools during installation, verify runout tolerances, and implement precision assembly procedures

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Geometric tolerances per ISO 1101, dimensional tolerances per ISO 286 IT6-IT7, surface finish Ra 0.8-3.2 μm

Test Method

Coordinate measuring machine (CMM) verification, surface roughness testing, hardness testing, runout measurement with dial indicators, ultrasonic testing for material defects

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 Hub/Bore

Manufacturer profiles associated with Mounting Hub/Bore.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the primary function of a mounting hub/bore in cam mechanisms?

The mounting hub/bore serves as the critical interface that securely connects cam elements to rotating shafts, ensuring precise torque transmission, accurate angular positioning, and synchronized motion between cam and driven components while maintaining structural integrity under operational loads.

How are mounting hubs/bores typically secured to shafts?

Mounting hubs/bores are secured using interference fits (press fits), keyways with keys, splined connections, or clamping mechanisms. The selection depends on torque requirements, disassembly frequency, and precision needs, with interference fits providing the highest concentricity for precision applications.

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 Hub/Bore