Airtac SEJ Adjustable Cylinder SEJ40X250-50S
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 SEJ40X250-50S Adjustable Cylinder Specifications
- Model: SEJ40X250-50S
- Type: Double-acting adjustable stroke cylinder with magnetic piston
- Bore size: 40mm
- Stroke: 250mm (adjustable)
- Adjustment mechanism: External mechanical stopper with locknut
- Operating pressure: 0.05–1.0 MPa
- Cushioning: Adjustable pneumatic cushion at both ends
- Port size: 1/4" NPT (G1/8 optional)
- Piston rod material: Chrome-plated carbon steel (S45C)
- Tube material: Anodized aluminum alloy
- Seal material: NBR (Nitrile) with wear-resistant ring
- Temperature range: -20℃ to 80℃
- Weight: 3.8 kg ±2%
- Dimensions:
- Extended length: 558mm
- Retracted length: 308mm
- Body diameter: 56mm
- Mounting base: 96mm × 40mm
- Protection rating: IP54 (standard wiper seal)
- Lubrication: Pre-lubricated (Oil-free operation possible)
Precision-adjustable industrial cylinder featuring dual-position mechanical stroke adjustment through rotating collar mechanism. The chrome-plated piston rod incorporates wear-resistant coating (H.C.C) for extended service life in high-cycle applications. Integrated magnet in piston enables position feedback when used with compatible sensors.
- Variable position clamping fixtures in CNC machining centers
- Packaging line product positioning gates
- Automated warehouse vertical lift actuators
- Plastic injection molding ejector systems
- Printing press paper feed mechanisms
Installation recommendation:
Mount using M8×1.25 mounting bolts with 22-25 N·m torque. For vertical installations,
orient adjustment collar downward to prevent debris accumulation. Perform stroke
adjustment in depressurized state.
- Standard: 5,000 km travel distance (NBR seals)
- Extended: 8,000 km with optional polyurethane seals
- Re-lubrication interval: Every 500,000 cycles (using ISO VG32 hydraulic oil)
| Property | Property Value |
|---|---|
| sku | SEJ40X250-50S |
| Adjustable Stroke | <50mm> |
| 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.