Professional ISO R773:1969 Key Blank Dimensions Guide
International standard specifying dimensional requirements for key blanks including length, width, thickness, and profile specifications for mechanical keys used in locks and security systems. Access comprehensive professional guidance for implementing industry-standard key blank manufacturing with precision dimensional compliance and quality assurance.
Standard Overview
Publication Date
1969 (First Edition)
Status
International Standard
Application
Key Blank Manufacturing
Scope
Dimensional Specifications
Technical Specifications
Length Specifications
Width Specifications
Thickness Specifications
Profile Specifications
Implementation Guidelines
Manufacturing Requirements
- Material Standards: Use high-grade steel or brass alloys meeting ISO 4957 specifications
- Heat Treatment: Proper hardening to achieve 45-55 HRC surface hardness
- Surface Finish: Ra ≤ 1.6μm for optimal lock mechanism compatibility
- Dimensional Accuracy: Maintain tolerances within ±0.05mm for critical dimensions
- Edge Quality: Deburred edges with radius 0.1-0.3mm to prevent lock damage
Quality Control
- Dimensional Inspection: Use calibrated measuring equipment per ISO 14253
- Hardness Testing: Rockwell C scale testing at multiple points
- Surface Roughness: Profilometer measurement per ISO 4287
- Functional Testing: Verify fit and operation in representative lock mechanisms
- Documentation: Maintain complete traceability records per ISO 9001
Motorcycle Applications
- Ignition Keys: Standard length 45-55mm for most motorcycle models
- Fuel Cap Keys: Typically shorter 35-45mm with specific profile requirements
- Seat Lock Keys: Often 25-35mm with simplified cutting patterns
- Security Features: Consider transponder integration for modern motorcycles
- Weather Resistance: Enhanced corrosion protection for outdoor exposure
Common Issues & Solutions
- Key Binding: Check thickness tolerance and edge finish quality
- Premature Wear: Verify material hardness and surface treatment
- Poor Cutting: Ensure proper blank dimensions before machining
- Lock Damage: Inspect edge radius and remove all burrs
- Inconsistent Operation: Validate dimensional accuracy across production batch
Compliance Checklist
Pre-Production Verification
Production Monitoring
Frequently Asked Questions
What is ISO R773:1969?
ISO R773:1969 is an international standard that specifies dimensional requirements for key blanks including length, width, thickness, and profile specifications for mechanical keys used in locks and security systems. This standard complements ISO 2491:1974 cutting specifications and follows IEC 60068-2-6 environmental testing protocols for optimal manufacturing precision and reliability.
What are the standard key length specifications?
The standard specifies key lengths ranging from 25mm to 85mm depending on the application and lock type, with specific tolerances for each length category according to ANSI B18.2.1 dimensional standards and DIN 18252 mechanical key requirements for professional manufacturing compliance.
What thickness tolerances are specified?
ISO R773:1969 specifies thickness tolerances of ±0.05mm to ensure proper fit and function in lock mechanisms while maintaining structural integrity per ISO 286-1 tolerance standards and ASTM E18 hardness testing requirements.
Does this standard apply to motorcycle key blanks?
Yes, ISO R773:1969 applies to all mechanical key blanks including motorcycle keys, providing universal dimensional specifications for key manufacturing across different vehicle types following SAE J1747 automotive key standards and industry best practices.