This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X530S, 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 SI50X530S
The AirTAC SI50 Standard Cylinder SI50X530S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 530mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X530S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke530 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X530S
- 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 SI50X530S
The AirTAC SI50X530S is a discontinued double-acting ISO 15552 profile cylinder featuring a 50mm bore, 530mm stroke, and a G1/4 air port. Delivering 982 N of push force at 0.5 MPa, it is replaced directly by the SAI50X530S. This upgrade maintains the exact ISO 15552 mounting interface, output force, and dimensions, dropping straight into existing fixtures.
The SAI successor introduces an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. For applications needing load holding, the SAI family adds SAIL and BSAI lock variants the SI lacked. The built-in magnet supports legacy CS1-B/DS1-B sensors.
Airtac SI50 Standard Cylinder SI50X530S Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X530S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X530S |
| Bore size | Ø50 mm |
| Stroke | 530 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 SAI50X530S 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 SAI50X530S 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 SI50X530S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×530 | 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 SI50X530S Is Used
Long-Stroke Diversion
Pushes packages across transfer lines using the full 530mm travel, relying on external guides to prevent rod bending during lateral diversion.
Multi-Station Indexing
Moves tooling platens between machining cells, using the G1/4 port and adjustable 30mm cushions to decelerate payloads smoothly at cycle end.
Replacing the Airtac SI50 Standard Cylinder SI50X530S with the SAI50X530S
To replace the SI50X530S, order the SAI50X530S and verify the ISO 15552 interface, G1/4 port, and M16x1.5 rod thread. Because the 530mm stroke exceeds 300mm, use external guides to prevent rod bending and side-load damage. If sizing down, a 40mm bore yields 628 N push at 0.5 MPa; if sizing up, a 63mm bore provides 1559 N. Remember that a standard cylinder drifts on air loss—the cushion only decelerates. For held loads, use an external pilot check valve or explore the SAIL lock variant. The -S magnet works with CS1-B/DS1-B switches; the SAI uses current AirTAC sensors.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X530S
- ✓ 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 SI50X530S FAQ
Yes, the SI50X530S is discontinued. The direct replacement is the AirTAC SAI50X530S. It shares the identical ISO 15552 mounting interface, 50mm bore, 530mm stroke, G1/4 port, and output force, fitting existing fixtures perfectly while upgrading the piston seal.
This double-acting cylinder features a G1/4 air port and an M16x1.5 rod thread. It delivers 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 force of 200 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X530S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X530S replacement — usually within 7-8 hours.