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 SI125BX40 Standard Cylinder Specifications
- Model: SI125BX40
- Type: ISO 15552 compliant double-acting cylinder
- Bore size: 125 mm
- Stroke: 40 mm (customizable up to 2000 mm)
- Operating pressure: 0.05–1.0 MPa
- Cushioning: Adjustable pneumatic cushion (both ends)
- Mounting style: Basic square flange (MF12)
- Port size: G1/2 (ISO 228 standard)
- Piston rod thread: M20×1.5 (external)
- Ambient temperature: -20℃ to 80℃
- Seal material: Nitrile rubber (NBR) standard, optional Polyurethane (PU)
- Weight: 6.8 kg (with standard stroke)
- Dimensions: 298mm(L) × 142mm(W) × 142mm(H) (at 40mm stroke)
- Rod end type: Female threaded with shock absorber
- Corrosion protection: Chromium-plated rod & anodized barrel
High-force industrial cylinder with precision-guided piston movement, featuring a wear-resistant aluminum alloy barrel and integrated magnetic sensor slots (optional). Designed for heavy-duty cyclic operations with 50,000km+ service life under standard conditions. Requires 40μm filtered air with ISO VG32 lubrication.
- Press machine ejection systems
- Automotive welding fixture clamping
- Packaging line product positioning
- Foundry equipment door actuators
- Plastic injection molding ejectors

Property | Property Value |
---|---|
sku | SI125BX40 |
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 | SUS304 |
Magnet | Non-magnetic |
Bore Diameter | 125mm |
Stroke | <40mm> |
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.