This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50AX130, with the same bore, stroke, output force, port and mounting, so it fits the same application. The SAI replacement keeps the same ISO 15552 mounting interface, bore, stroke, output force and accessories, so it drops straight into existing fixtures. It is the current-production version of this cylinder with an upgraded piston seal.
Airtac SI50 Standard Cylinder SI50AX130
The AirTAC Airtac SI50 Standard Cylinder SI50AX130 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 130mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50AX130, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke130 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50AX130
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SI50 Standard Cylinder SI50AX130
The AirTAC SI50AX130 is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 130mm stroke. Delivering 982N push force at 0.5MPa via a G1/4 port, it is replaced by the SAI50AX130. This direct successor shares the exact ISO 15552 mounting interface, bore, stroke, force and port.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. This SKU has an SUS420J2 stainless rod (-A) but lacks a magnet (-S), meaning it cannot take CS1-B/DS1-B sensors.
Airtac SI50 Standard Cylinder SI50AX130 Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50AX130 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50AX130 |
| Bore size | Ø50 mm |
| Stroke | 130 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M16×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI50AX130 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
The SAI50AX130 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI50 Standard Cylinder SI50AX130
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×130 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SI-family variants: SID (double rod), SIJ (adjustable stroke) — each maps to its SAI equivalent (SID→SAID, SIJ→SAIJ). Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B).
Where the Airtac SI50 Standard Cylinder SI50AX130 Is Used
Stainless Rod Clamping
Leverages the SUS420J2 rod to resist moisture while providing 982N of clamping force to hold medium workpieces in machining fixtures.
Transfer Line Diversion
Executes 130mm strokes to push products between parallel conveyor belts, operating reliably at speeds up to 800mm/s.
Pallet Stopper Gate
Acts as a retractable stop for pallets up to 50kg, using the 825N pull force to clear the path for downstream routing.
Replacing the Airtac SI50 Standard Cylinder SI50AX130 with the SAI50AX130
To replace the SI50AX130, order the SAI50AX130, confirming the ISO 15552 interface, 50mm bore, 130mm stroke, G1/4 port, and SUS420J2 rod. Since this SKU lacks a magnet (-S), it cannot accept position sensors; add the -S suffix if sensing is needed. For sizing, a 40mm bore yields 628N push at 0.5MPa, while a 63mm bore yields 1559N. Note that a plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50AX130
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI50 Standard Cylinder SI50AX130 FAQ
Yes, the SI50AX130 is discontinued. The direct replacement is the SAI50AX130. It is dimensionally interchangeable per ISO 15552, matching the 50mm bore, 130mm stroke, 982N force, G1/4 port, and mounting interface.
This double-acting cylinder has a G1/4 port. It delivers 982N push and 825N pull at 0.5MPa, 1374N push at 0.7MPa, 1767N push at 0.9MPa, and a theoretical max of 200kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50AX130
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50AX130 replacement — usually within 7-8 hours.