Product Overview
The HEIDENHAIN DA 400 Encoder Sealing Air Filter Unit (Part Number: 894602-01) is a genuine OEM accessory engineered to supply clean, dry, and oil-free sealing air to HEIDENHAIN rotary and angle encoders equipped with a sealing air connection. The DA 400 unit prevents the ingress of coolant, dust, chips, and other airborne contaminants into the encoder housing by maintaining a controlled positive pressure barrier. This accessory is essential for preserving signal integrity and extending encoder service life in harsh industrial environments where exposure to machining fluids and particulate matter is unavoidable. The unit is designed for direct integration into the encoder’s sealing air circuit, ensuring reliable protection for precision feedback systems used in machine tools and automated production equipment.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | General Industrial Parts > Spares & Accessories (Encoder Sealing Air Filter Unit) |
| Model Designation | DA 400 / 894602-01 |
| Manufacturer | HEIDENHAIN |
| Function | Supplies filtered sealing air to encoder housing to maintain positive pressure |
| Filtration | Integrated filter element for removal of oil, water, and particulate contaminants |
| Operating Pressure | Standard Industrial Grade (regulated low-pressure sealing air supply) |
| Mounting & Connection | Standard pneumatic fittings compatible with HEIDENHAIN encoder sealing air ports |
| Compatibility | HEIDENHAIN encoders with sealing air connection (e.g., RCN, RON, ROC series) |
Engineering Features & Advantages
- Contamination Barrier: Maintains a positive pressure envelope around the encoder, actively preventing coolant, chips, and dust from reaching the optical scanning mechanism.
- Integrated Filtration: Removes oil aerosols, condensate, and fine particles from the compressed air supply, protecting sensitive encoder internals from degradation.
- OEM Compatibility: Genuine HEIDENHAIN part (894602-01) ensures exact dimensional and functional fit with DA 400 sealing air systems and compatible encoder models.
- Industrial Reliability: Built for continuous operation in demanding machine tool environments, reducing unplanned downtime caused by encoder contamination.
- Direct Fit Replacement: Drop-in replacement for the original sealing air filter unit, requiring no modification to existing pneumatic or mounting interfaces.
Typical Industrial Applications
This sealing air filter unit is commonly deployed in precision machine tool applications such as CNC machining centers, grinding machines, and milling systems where encoders are exposed to coolant mist and metal chips. It is also used in automated production lines, gear cutting equipment, and high-accuracy rotary table systems that rely on HEIDENHAIN encoders for position feedback. Additional applications include semiconductor manufacturing equipment and other cleanroom
PRODUCT IMAGES
HEIDENHAIN DA 400 / 894602-01 Encoder Sealing Air Filter Unit
âš¡ Emergency Plant Maintenance & Ready-to-Ship Notice:
- Authentic & Fully Tested: 100% bench tested for hydraulic response, pressure rating, and null-bias stability before dispatch.
- Fast Dispatch: In-stock units ready for same-day dispatch via DHL / FedEx Express directly to your plant.
- Pre-Shipment Verification: High-definition photos, video testing runs, and serial number verification provided prior to shipment.
- Peace of Mind: Covered by our 12-Month Replacement Warranty.
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