Airtac SEJ Adjustable Cylinder SEJ40X250-75
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 SEJ40X250-75 Adjustable Stroke Cylinder Specifications
- Model: SEJ40X250-75
- Type: Double-acting adjustable stroke cylinder
- Bore size: 40mm
- Stroke: 250mm (adjustable through mechanical stopper)
- Adjustment range: 0-75% of full stroke (187.5mm max reduction)
- Operating pressure: 0.05-1.0 MPa
- Medium temperature: -20℃ to 80℃
- Cushioning: Adjustable pneumatic cushion at both ends
- Mounting type: Basic type (optional ISO/VDMA mounts available)
- Port size: G1/8 (NPT1/8 optional)
- Piston rod material: Hard chrome-plated carbon steel
- Tube material: Aluminum alloy with hard anodizing
- Seal material: NBR (Nitrile rubber)
- Weight: 2.8kg ±5% (without accessories)
- Dimensions:
- Length: 450mm (fully extended)
- Width: 68mm (including mounting bosses)
- Height: 68mm (square tube profile)
High-precision adjustable stroke cylinder featuring dual-position mechanical stoppers with 1mm incremental adjustment. The integrated locknut mechanism prevents accidental position drift during operation. Specialized wear-resistant guide rings ensure smooth movement even under side load conditions. Compatible with all standard AirTAC mounting accessories.
- Variable position clamping in CNC fixture systems
- Material handling with adjustable lifting heights
- Packaging machine product height compensation
- Automated welding positioners
- Press tooling with depth control requirements
Installation tip:
Apply Molykote G-rapid grease to adjustment screws during assembly.
Maximum side load capacity reduces by 30% when stroke is adjusted below 50% -
consider upsizing if frequent heavy side loads are expected.
| Property | Property Value |
|---|---|
| sku | SEJ40X250-75 |
| Adjustable Stroke | 75mm |
| 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 | Non-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.