This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X14S, 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 SI50X14S
The AirTAC Airtac SI50 Standard Cylinder SI50X14S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 14mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X14S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke14 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X14S
- 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 SI50X14S
The AirTAC SI50X14S is a discontinued double-acting ISO 15552 profile cylinder with a 50 mm bore and 14 mm stroke. It delivers 982 N push force at 0.5 MPa through a G1/4 port. The direct replacement is the SAI50X14S, matching the bore, stroke, force, port and ISO 15552 mounting interface.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The -S suffix means this legacy unit uses CS1-B/DS1-B sensors, whereas the SAI uses current AirTAC switches.
Airtac SI50 Standard Cylinder SI50X14S Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X14S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X14S |
| Bore size | Ø50 mm |
| Stroke | 14 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 SAI50X14S 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 SAI50X14S 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 SI50X14S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×14 | 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 SI50X14S Is Used
Short-Stroke Clamping
Ideal for holding parts during machining or welding, using the 982 N push force at 0.5 MPa to secure components firmly within a compact 14 mm travel.
Diversion Gate Actuation
Provides rapid sorting movements on packaging lines, leveraging the 30-800 mm/s speed range to pivot lightweight routing gates efficiently.
Replacing the Airtac SI50 Standard Cylinder SI50X14S with the SAI50X14S
To replace the SI50X14S, order the SAI50X14S keeping the identical 50 mm bore, 14 mm stroke, G1/4 port and ISO 15552 mounting interface. Confirm your thread standard (PT, G or NPT) and mounting accessory (LB, FA, TC, etc.). The -S magnet allows for position sensing; the SAI family accepts current AirTAC switches. If sizing up or down, the neighbouring 40 mm bore yields 628 N push at 0.5 MPa, while the 63 mm bore provides 1559 N. Note that a plain cylinder drifts on air loss as the cushion only decelerates; for load holding consider an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X14S
- ✓ 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 SI50X14S FAQ
Yes, the AirTAC SI50X14S is discontinued. The direct replacement is the SAI50X14S. It shares the exact same ISO 15552 mounting interface, 50 mm bore, 14 mm stroke, 982 N output force and G1/4 port size, fitting existing fixtures perfectly.
This 50 mm bore cylinder uses a G1/4 air port. The thrust ratings are: 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 maximum of 200 kgf at 1.0 MPa.
Request a Quote for the SAI50X14S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X14S replacement — usually within 7-8 hours.