This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X50SCA, 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 SI50X50SCA
The AirTAC Airtac SI50 Standard Cylinder SI50X50SCA is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 50mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X50SCA, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke50 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X50SCA
- 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 SI50X50SCA
The AirTAC SI50X50SCA is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 50mm stroke, delivering 982 N push force at 0.5 MPa. The direct replacement is the SAI50X50SCA, matching the exact bore, stroke, G1/4 port, and CA clevis mounting interface for seamless fixture integration.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. This unit includes a piston magnet for CS1-B/DS1-B switches; the SAI replacement family supports current AirTAC switches.
Airtac SI50 Standard Cylinder SI50X50SCA Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X50SCA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X50SCA |
| Bore size | Ø50 mm |
| Stroke | 50 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 SAI50X50SCA 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 SAI50X50SCA 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 SI50X50SCA
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×50 | 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 SI50X50SCA Is Used
Clamp Actuation
Provides 982 N of clamping force at 0.5 MPa, ideal for securing mid-sized workpieces during machining or welding operations.
Package Diverting
Delivers rapid 50 mm strokes at 30-800 mm/s to push cartons or products cleanly between adjacent conveyor lanes.
Replacing the Airtac SI50 Standard Cylinder SI50X50SCA with the SAI50X50SCA
To replace the discontinued SI50X50SCA, order the SAI50X50SCA ensuring the ISO 15552 interface, 50mm bore, 50mm stroke, G1/4 port, and CA clevis mounting match your existing fixture. The -S magnet provision is retained for position sensing. Sizing both ways: if you need less force, the 40mm bore offers 628 N push at 0.5 MPa; if you need more, the 63mm bore provides 1559 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates near stroke end. For load holding, specify an external pilot check valve, rod lock, or the SAIL/BSAI lock variants. The SAI family also adds the SAIF self-valve option (bores 32-100) the SI lacked.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X50SCA
- ✓ 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 SI50X50SCA FAQ
Yes, the AirTAC SI50X50SCA is discontinued. The direct replacement is the SAI50X50SCA. It is dimensionally interchangeable per ISO 15552, retaining the same 50mm bore, 50mm stroke, 982 N force, G1/4 port, and CA clevis mounting.
The 50mm bore features a G1/4 air port and a 20mm rod. Force output is 982 N push and 825 N pull at 0.5 MPa, 1374 N push at 0.7 MPa, and a theoretical maximum of 200 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X50SCA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X50SCA replacement — usually within 7-8 hours.