Airtac SI125 Standard Cylinder SI125X139.5
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 SI125X139.5 Standard Cylinder Specifications
- Model: SI125X139.5
- Type: ISO 15552 compliant double-acting cylinder
- Bore size: Ø125mm (±0.1mm precision honing)
- Stroke: 139.5mm (customizable stroke available)
- Operating pressure: 0.05-1.0 MPa (0.5-10 bar)
- Cushioning: Adjustable pneumatic cushion at both ends
- Port size: G1/2 (BSPP thread)
- Piston rod material: Chrome-plated 45# steel (hardness HRC 35-40)
- Tube material: Aluminum alloy (6063-T5) with hard anodized surface
- Seal material: NBR (standard), optional FKM/Viton for high temp
- Temperature range: -20℃ to 80℃ (extended to 150℃ with FKM seals)
- Max theoretical force: 1227N @ 0.63MPa (extend), 1068N @ 0.63MPa (retract)
- Weight: 9.8kg ±2% (excluding accessories)
- Dimensions:
- Total length: 374mm (stroke+base length)
- Body diameter: Ø140mm
- Mounting face: 165×165mm square flange
- Rod end thread: M33×1.5
- Protection rating: IP65 (standard), IP67 optional
- Lubrication: Pre-lubricated (recommended relube interval: 2000km)
High-torque industrial cylinder designed for heavy-duty linear motion applications. Features precision-ground rod guides and multi-lip seals for minimal leakage (<0.5mL/min @ 0.5MPa). The anodized barrel resists corrosion in humid environments. Requires 40μm filtered compressed air with ISO 8573-1:2010 Class 3.4.3 air quality.
- Metal stamping press ejection systems
- Automotive welding fixture positioning
- Packaging machinery compression units
- Foundry equipment door actuators
- Plastic injection molding machine core pulls
Installation protocol:
Align cylinder axis within ±0.2° deviation. Use flexible couplings for rod-end connections.
For vertical mounting, install speed controller in cap end port. Lubricate through air line
using ISO VG32 turbine oil at 1 drop/m³ airflow.
| Property | Property Value |
|---|---|
| sku | SI125X139.5 |
| 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 | 139.5 mm |
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.