Airtac SEJ Adjustable Cylinder SEJ40X250-20S
2. Asymmetric bidirectional piston seal structure with compact dimensions and integrated oil reservoir function;
3. Rodless square aluminum tubing construction enhances corrosion resistance;
4. Adjustable cushioning mechanism ensures smooth stroke modulation;
5. Customizable configurations with multiple cylinder variants and mounting accessories;
6. High-temperature resistant sealing materials enable operational range of 0-150°C.
Category: Adjustable Cylinders | Brand: AirTAC | Series: SEJ
AirTAC SEJ Adjustable Cylinder SEJ40X250-20S Technical Specifications
- Model: SEJ40X250-20S
- Type: Double-acting adjustable stroke cylinder
- Bore size: 40mm
- Stroke: 250mm (adjustable through external stopper)
- Operating pressure: 0.15–0.8 MPa
- Temperature range: -20℃ to 80℃
- Cushioning: Adjustable buffer at both ends
- Mounting style: Standard MF4 flange mounting
- Port size: M5x0.8 (1/8" NPT optional)
- Tube material: Anodized aluminum alloy
- Piston rod material: Chrome-plated steel (Cr-Mo)
- Seal material: NBR (Nitrile rubber)
- Weight: 2.65kg ±3%
- Dimensions: 350mm(L) × 80mm(W) × 80mm(H) (fully extended)
- Rod end thread: M16x1.5
- Maximum speed: 500mm/s
- Protection rating: IP54 (standard wipers)
Precision-engineered adjustable stroke cylinder featuring dual-position mechanical stoppers for millimeter-level positioning accuracy. The hardened piston rod and multi-lip seal design ensure 2,000km+ service life under continuous operation. Includes built-in magnetic sensor slot (PNP/NPN compatible) for position feedback integration.
- Variable height positioning in assembly jigs
- Material handling systems with adjustable clamping force
- Packaging machine stroke adjustment for different box sizes
- Automated welding equipment with position-sensitive tooling
- Semiconductor wafer handling with precision stroke control
Operation tip:
Lubricate with ISO VG32 hydraulic oil before initial use. For micro-adjustments,
loosen the lock nut (M6) and rotate the stopper screw (2mm pitch) - each full
rotation equals 2mm stroke reduction. Max adjustment range: ±10mm from nominal stroke.
| Property | Property Value |
|---|---|
| sku | SEJ40X250-20S |
| Adjustable Stroke | <20mm> |
| Seal Material | Polyurethane |
| Understood. Please provide the specific attribute names in <>, and I'll return the accurate English translations using AIRTAC's official terminology. Example: User input: <缸径> My output: Bore | Operating Temperature:-20-70°C Speed Range:30-800mm/s |
| Port Size | PT1/4 |
| Magnet | S-Magnetic |
| Bore Diameter | <40mm> |
| Stroke | <250MM> → <250mm> |
Returns will be accepted for up to 15 days of Customer’s receipt or tracking number on Not used items. You, as a Customer, are obliged to inform us via email before you return the item, only in the case of:
- Received the wrong item.
- Item arrived not as expected (ie. damaged packaging).
- Item had defects.
- Over delivery time.
- The shipper does not allow the goods to be inspected before payment.
The returned product(s) must be in the original packaging, safety wrapped, undamaged and unworn. This means that the item(s) must be safely packed in a carton box for protection during transport, possibly the same carton used to ship to you as a customer.