High-Precision Parallel Keys (DIN 6885A / ISO 2491)
Parallel Keys, also known as machine keys or square keys, are critical components in mechanical power transmission. They are designed to be inserted into keyways to lock a shaft and a hub (such as a gear, pulley, or coupling) together, ensuring efficient torque transfer without slippage.
Our parallel keys are manufactured strictly to international standards, providing the reliability needed for high-speed industrial applications. Whether you need standard sizes or custom dimensions, we provide the perfect fit for your engineering requirements.
Technical Specifications & Material Options
Precision is our priority. We utilize cold-drawing processes to achieve h9 or h11 tolerances, minimizing vibration and mechanical wear.
- C45 Carbon Steel: Ideal for general machinery with an excellent balance of hardness and tensile strength.
- Stainless Steel (SUS304/SUS316): Best for food processing, marine, and chemical environments requiring high corrosion resistance.
Standard Dimensions Table
| Width (mm) | Height (mm) | Length Range (mm) | Standard |
|---|---|---|---|
| 2 – 6 | 2 – 6 | 6 – 60 | DIN 6885A |
| 8 – 12 | 7 – 8 | 10 – 100 | DIN 6885A |
| 14 – 20 | 9 – 12 | 20 – 200 | DIN 6885A |
| 22 – 50 | 14 – 28 | 40 – 400 | DIN 6885A |
Key Features
- High Torque Resistance: Engineered to withstand heavy-duty industrial loads.
- Standard Compliance: Fully compliant with DIN 6885A, ISO 2491, and GB/T 1096.
- End Shapes: Available in Round Ends (Form A), Square Ends (Form B), and One-End Round (Form C).
- Surface Finish: Burr-free, smooth finish for easy installation.
Frequently Asked Questions (FAQ)
Q1: What is the difference between Form A and Form B Parallel Keys?
A: Form A has rounded ends, suitable for milled keyways with rounded ends. Form B has square ends, typically used for through-keyways or specific industrial designs.
Q2: Do you offer custom sizes for Parallel Keys?
A: Yes, we provide customization services for non-standard widths, heights, and lengths based on your technical drawings.
Q3: What are the available surface treatments?
A: Standard keys come in a plain finish (oiled). We also offer zinc plating, black oxide, and passivation for stainless steel versions.
