This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X130S, 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 SI50X130S
The AirTAC Airtac SI50 Standard Cylinder SI50X130S 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 SAI50X130S, 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 → SAI50X130S
- 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 SI50X130S
The AirTAC SI50X130S is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 130mm stroke. It delivers 982 N push and 825 N pull at 0.5 MPa, utilizing a G1/4 port and M16x1.5 rod thread. AirTAC replaced this legacy unit with the SAI50X130S, a direct upgrade retaining the exact ISO 15552 mounting interface, bore, stroke, output force, and porting to fit existing fixtures seamlessly.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The SAI family also introduces SAIL, SAIF, and BSAI lock variants absent in the SI line. This -S SKU includes a piston magnet for CS1-B/DS1-B sensors, though the SAI uses current AirTAC switches.
Airtac SI50 Standard Cylinder SI50X130S Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X130S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X130S |
| 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 SAI50X130S 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 SAI50X130S 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 SI50X130S
| 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 SI50X130S Is Used
Package Diversion
Actuates routing gates on packaging lines, utilizing the 982 N push force at 0.5 MPa to deflect cartons reliably without overshooting.
Clamp Actuation
Secures medium workpieces during machining. The 50 kg vertical lift capacity handles heavy fixtures while the 130mm stroke accommodates part variance.
Pallet Stopper
Deploys as a pneumatic stop for pallets on roller conveyors, absorbing impact via the adjustable 30mm air cushions at both ends.
Replacing the Airtac SI50 Standard Cylinder SI50X130S with the SAI50X130S
To replace the SI50X130S, order the SAI50X130S. Confirm the ISO 15552 mounting interface, 130mm stroke, G1/4 port (PT/G/NPT), and your mounting accessory (LB, FA, TC, etc.). The -S suffix means a magnet is present for position sensing; a no-S SKU cannot take a sensor. For sizing, the 50mm bore yields 982 N push at 0.5 MPa; neighboring bores are 40mm (628 N) and 63mm (1559 N). Note that a plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. With a 130mm stroke, side-load is minimal, but always guide the rod to prevent bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X130S
- ✓ 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 SI50X130S FAQ
Yes, the AirTAC SI50X130S is discontinued. The direct replacement is the SAI50X130S. It shares the same ISO 15552 mounting interface, 50mm bore, 130mm stroke, output force, and G1/4 port, fitting existing fixtures perfectly while upgrading the piston seal.
The 50mm bore uses a G1/4 air port. It generates 982 N push and 825 N pull at 0.5 MPa, 1374 N push at 0.7 MPa, 1767 N push at 0.9 MPa, and a theoretical max of 200 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X130S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X130S replacement — usually within 7-8 hours.