This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X50CA, 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 SI50X50CA
The AirTAC Airtac SI50 Standard Cylinder SI50X50CA 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 SAI50X50CA, 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 → SAI50X50CA
- 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 SI50X50CA
The AirTAC SI50X50CA is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 50mm stroke. Built with an extruded aluminum barrel, it delivers 982N push force at 0.5MPa via a G1/4 port. AirTAC replaced this legacy unit with the SAI50X50CA, a direct upgrade retaining the exact CA clevis mounting, M16x1.5 rod thread, and output force.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. Note this specific SKU lacks a magnet (-S) and cannot accept CS1-B/DS1-B sensors. The family also adds SAIL, SAIF, and BSAI lock variants absent in the SI line.
Airtac SI50 Standard Cylinder SI50X50CA Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X50CA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X50CA |
| 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 SAI50X50CA 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 SAI50X50CA 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 SI50X50CA
| 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 SI50X50CA Is Used
Clamp Actuation
Provides reliable 982N clamping force for mid-sized machining fixtures, easily dropping into existing ISO 15552 CA clevis mounts.
Package Diverting
Drives short-stroke diverting arms on packaging lines, with the 50mm stroke offering rapid 30-800 mm/s cycling.
Replacing the Airtac SI50 Standard Cylinder SI50X50CA with the SAI50X50CA
To replace the SI50X50CA, order the SAI50X50CA. Confirm the ISO 15552 interface, 50mm bore, 50mm stroke, G1/4 port (PT/G/NPT thread options), and CA clevis mounting. Because this SKU has no magnet, it cannot support position sensing; if switches are needed, specify an SAI50X50CAS. Sizing both ways: a 40mm bore offers 628N push at 0.5MPa, while a 63mm bore provides 1559N. A plain cylinder drifts without live air—the cushion only decelerates—so for load holding use an external pilot check valve or the SAIL/BSAI lock variant. At 50mm stroke, side-load risks are minimal, but always guide the load.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X50CA
- ✓ 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 SI50X50CA FAQ
Yes, the SI50X50CA is discontinued. The direct replacement is the SAI50X50CA. It shares the identical ISO 15552 mounting interface, 50mm bore, 50mm stroke, CA clevis mount, and G1/4 port, fitting existing fixtures perfectly while upgrading the piston seal.
The 50mm bore features a G1/4 air port and M16x1.5 rod thread. It generates 982N push and 825N pull at 0.5MPa, 1374N push at 0.7MPa, and a theoretical maximum of 200kgf at 1.0MPa. Speed ranges 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X50CA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X50CA replacement — usually within 7-8 hours.