2. Piston features bidirectional Y-seal structure with cushioning function, offering extended service life and low friction resistance;
3. Aluminum barrel with cruciform reinforcement and black-anodized piston rod for enhanced corrosion resistance;
4. Precision machined cylinder surface ensures smooth operation;
5. Multiple cylinder specifications and mounting accessories available for flexible configurations.
Category: Standard Cylinders | Brand: AIRTAC | Series: SI125
AirTAC SI125X440 Standard Cylinder Specifications
- Model: SI125X440
- Bore size: 125mm
- Stroke: 440mm
- Operating pressure: 0.05–1.0 MPa
- Operating temperature: -20℃ to 80℃
- Port size: G3/8 (NPT1/2 optional)
- Cushion type: Adjustable air cushion (both ends)
- Mounting style: Basic type (MF1)
- Piston material: Cast aluminum alloy
- Rod material: Chrome-plated steel (Cr-Mo)
- Seal material: NBR (nitrile rubber)
- Weight: 12.5kg ±3% (without accessories)
- Dimensions:
- Extended length: 822mm
- Retracted length: 382mm
- Body width: 160mm
- Mounting height: 45mm
- Protection rating: IP54 (standard), IP67 optional
- Lubrication: Pre-lubricated (DIN standard VG68 oil)
High-force industrial cylinder with heavy-duty construction, featuring dual adjustable pneumatic cushions for smooth end-of-stroke deceleration. The chrome-plated piston rod includes a wear-resistant coating (25-30μm thickness) with scratch detection layer. Designed for applications requiring precise linear motion under variable loads.
- Automotive assembly line clamping fixtures
- Injection molding machine ejectors
- Steel coil handling equipment
- Paper processing machinery
- Hydraulic press assist systems
- Align cylinder axis with motion direction within ±2° tolerance
- Allow 0.5-1% stroke margin for thermal expansion
- Use counterbalance valves when handling suspended loads
- Re-lubricate every 500km stroke (50ml oil per port)
| Property | Property Value |
|---|---|
| sku | SI125X440 |
| 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°C to 80°C Speed Range: 30-500 mm/s |
| Port Size | PT 1/2 |
| Piston Rod Material | Medium Carbon Steel |
| Magnet | Non-magnetic |
| Bore Diameter | 125mm |
| Stroke | 440mm |
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.









