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Pulley/Drive Keyway Component – Machinery and Equipment Manufacturing

Component Specifications

Definition

A mechanical component consisting of a grooved wheel (pulley) integrated with a precisely machined keyway slot, designed to mount on an eccentric shaft via a key for secure torque transmission. It converts rotational motion from the eccentric shaft into linear or rotational motion in connected systems, ensuring synchronized operation in industrial machinery.

Working Principle

The pulley rotates with the eccentric shaft, with the keyway and key preventing relative motion between them. The eccentricity of the shaft creates oscillating or variable motion, which the pulley transmits via belts or cables to other components, enabling controlled mechanical actuation or power transfer.

Materials

Typically made from medium-carbon steel (e.g., AISI 1045) or alloy steel (e.g., AISI 4140) for strength and wear resistance. Surface treatments may include hardening (e.g., induction hardening to 45-50 HRC) or coatings like zinc plating for corrosion protection.

Technical Parameters

Weight Varies by material and dimensions
Keyway Depth Typically 50-70% of key height
Keyway Width Standard sizes (e.g., 6mm, 8mm, 10mm per ISO 773)
Bore Diameter Matches eccentric shaft diameter (e.g., 25mm to 100mm)
Pulley Diameter Range: 50mm to 300mm
Tolerance Class ISO h9 for bore, H9 for keyway
Max Torque Capacity Depends on size (e.g., 100 Nm to 2000 Nm)

Standards

ISO 773, DIN 6885

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Pulley/Drive Keyway.

Parent Products

This component is used in the following industrial products

Eccentric Shaft

A rotating shaft with an offset center of mass that converts rotary motion into reciprocating motion in a jaw crusher.

View Product Details

Engineering Analysis

Risks & Mitigation

Keyway wear leading to slippage and reduced torque transmission
Improper key fit causing stress concentrations and shaft damage
Misalignment from manufacturing tolerances affecting system efficiency

FMEA Triads

Trigger: Inadequate lubrication or contamination in the keyway
Failure: Accelerated wear and keyway deformation, resulting in loss of torque transmission
Mitigation: Implement regular maintenance schedules, use protective covers, and apply high-temperature grease suitable for operating conditions.

Trigger: Excessive torque or shock loads beyond design limits
Failure: Key shear or keyway cracking, leading to catastrophic component failure
Mitigation: Design with safety factors (e.g., 1.5-2x expected load), use alloy steels, and conduct periodic torque testing.

Trigger: Poor machining tolerances or misalignment during installation
Failure: Vibration and uneven wear, reducing component lifespan and efficiency
Mitigation: Adhere to ISO/DIN standards for tolerances, use precision machining tools, and verify alignment during assembly with dial indicators.

Industrial Ecosystem

Compatible With

Eccentric shaft assemblies, conveyor systems, packaging machinery, textile machines, automotive camshaft drives

Interchangeable Parts

SKF, Timken, Browning, Martin Sprocket, Tsubaki

Compliance & Inspection

Tolerance

Bore: ISO h9, Keyway: ISO H9 per ISO 773; surface roughness Ra ≤ 3.2 μm for keyway walls

Test Method

Dimensional inspection with micrometers and gauges, torque testing via dynamometer, non-destructive testing (e.g., magnetic particle inspection) for cracks

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 purpose of the keyway in a pulley on an eccentric shaft?

The keyway ensures a positive drive connection between the pulley and eccentric shaft, preventing slippage and maintaining precise alignment for reliable torque transmission under variable loads.

How do I select the right keyway size for an eccentric shaft application?

Base selection on shaft diameter and torque requirements using standards like ISO 773. Consider factors like material strength, operating speed, and environmental conditions to prevent key shear or wear.

Can pulley/drive keyways be customized for non-standard eccentric shafts?

Yes, custom keyways can be machined to specific dimensions, but adherence to tolerance standards (e.g., ISO h9/H9) is recommended to ensure compatibility and safety.

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.

Pulley/Drive Keyway