High-Precision Woodruff Keys (DIN 6888 / ISO 3912)
Woodruff Keys, often referred to as semi-circular keys or half-moon keys, are specialized drive keys used primarily in high-speed rotational applications and machine tool manufacturing. Unlike standard parallel keys, Woodruff keys sit deeper in a semi-circular keyway, reducing the risk of the key vibrating out of its position.
Our Woodruff keys are engineered for precision and durability. By utilizing high-grade materials and advanced manufacturing processes, we ensure that every key meets the strict requirements of DIN 6888 and ISO 3912.
Technical Specifications & Material Selection
The unique semi-circular design allows the key to self-align with the hub, making installation easier and reducing the stress concentration on the shaft.
- C45 Carbon Steel: Provides high tensile strength and wear resistance for industrial machinery.
- Stainless Steel (304/316): Excellent for corrosive environments, food processing, and medical equipment.
Woodruff Key Dimensions Chart (Standard Sizes)
| Width (mm) | Height (mm) | Diameter (mm) | Standard |
|---|---|---|---|
| 2.0 – 3.0 | 2.6 – 5.0 | 7 – 13 | DIN 6888 |
| 4.0 – 5.0 | 5.0 – 9.0 | 16 – 22 | DIN 6888 |
| 6.0 – 8.0 | 10.0 – 13.0 | 25 – 32 | DIN 6888 |
| 10.0+ | 15.0+ | 45+ | DIN 6888 |
Key Advantages of Our Woodruff Keys
- Easy Installation: The tilting ability of the key allows it to adjust to the taper of the keyway automatically.
- Vibration Resistance: Deep seating ensures the key remains secure under high-speed operation.
- High Precision: Tight tolerances (h9/h11) prevent backlash in mechanical assemblies.
- Broad Material Range: Standard carbon steel and various stainless steel grades available from stock.
Frequently Asked Questions (FAQ)
Q1: What are the main benefits of using a Woodruff Key?
A: Woodruff keys are excellent for preventing the key from rolling out of the keyway. Their self-aligning nature makes them popular for tapered shafts.
Q2: Can I get Woodruff keys in customized dimensions?
A: Yes. We can manufacture customized keys based on your specific width, height, and radius requirements.
Q3: Which industries use these keys most frequently?
A: They are widely used in internal combustion engines, automotive steering columns, and machine tool spindles.
