This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X10, 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 SI50X10
The AirTAC Airtac SI50 Standard Cylinder SI50X10 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 10mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X10, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke10 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X10
- 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 SI50X10
The AirTAC SI50X10 is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 10mm stroke, delivering a thrust of 982 N at 0.5 MPa. AirTAC replaced this legacy unit with the SAI50X10, a direct upgrade retaining the exact bore, stroke, force, G1/4 port and ISO 15552 mounting interface. The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life.
Because this specific SKU lacks the -S magnet suffix, it cannot accept a position sensor. For load-holding, note that a plain cylinder drifts on air loss—the cushion only decelerates—so consider an external pilot check valve or the SAIL/BSAI lock variants.
Airtac SI50 Standard Cylinder SI50X10 Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X10 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X10 |
| Bore size | Ø50 mm |
| Stroke | 10 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 SAI50X10 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 SAI50X10 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 SI50X10
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×10 | 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 SI50X10 Is Used
Short-Stroke Clamping
Ideal for holding parts in machining fixtures where a 10mm stroke provides rapid, high-force clamping using the 982 N thrust at 0.5 MPa.
Ejector Mechanism
Functions as a compact ejection pin for stamped or molded parts, leveraging the 50mm bore and short 10mm travel for high-speed ejection.
Replacing the Airtac SI50 Standard Cylinder SI50X10 with the SAI50X10
To replace the SI50X10, order the SAI50X10 and verify your ISO 15552 mounting interface, bore, stroke, port (PT/G/NPT), and accessory type. This SKU has no magnet, so position sensing is impossible without a switch track; if sensing is needed, select an SAI50X10S. Sizing both ways: the 50mm bore yields 982 N push at 0.5 MPa, while the neighbouring 40mm bore offers 628 N. For load holding on air loss, use an external rod lock or pilot check valve, as the cushion only decelerates. The SAI family also adds SAIF (built-in valve) and SAIL/BSAI lock options the SI lacked.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X10
- ✓ 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 SI50X10 FAQ
Yes, the SI50X10 is discontinued. The direct replacement is the AirTAC SAI50X10. It is dimensionally interchangeable per ISO 15552, matching the 50mm bore, 10mm stroke, output force, G1/4 port and mounting fixtures.
This double-acting cylinder uses a G1/4 air port. It generates a push force of 982 N and a pull force of 825 N at 0.5 MPa, 1374 N push at 0.7 MPa, and a theoretical maximum of 200 kgf at 1.0 MPa.
Request a Quote for the SAI50X10
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X10 replacement — usually within 7-8 hours.