This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X530S, 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 SI40 Standard Cylinder SI40X530S
The AirTAC SI40 Standard Cylinder SI40X530S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 530mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X530S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke530 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X530S
- 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 SI40 Standard Cylinder SI40X530S
The AirTAC SI40X530S is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 530mm stroke. It delivers 628N push force at 0.5MPa via a G1/4 port. The direct replacement is the SAI40X530S, matching the exact bore, stroke, force, port, and ISO 15552 mounting interface.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. The SAI family also adds SAIL, SAIF, and BSAI lock variants the SI lacked. This -S model includes a piston magnet for CS1-B/DS1-B switches.
Airtac SI40 Standard Cylinder SI40X530S Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X530S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X530S |
| Bore size | Ø40 mm |
| Stroke | 530 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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, 27 mm |
| Max standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI40X530S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
The SAI40X530S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI40 Standard Cylinder SI40X530S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | 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 SI40 Standard Cylinder SI40X530S Is Used
Carton Diverting
Pushes packages laterally on a packaging line using the 530mm stroke to clear the main conveyor belt path.
Pallet Loading
Actuates a low-friction transfer arm to slide cardboard blanks into position before stretch wrapping.
Light Pressing
Provides consistent downward pressure for seating bearings or pins, utilizing the 628N push force.
Replacing the Airtac SI40 Standard Cylinder SI40X530S with the SAI40X530S
To replace the SI40X530S, order the SAI40X530S and confirm the ISO 15552 interface, 40mm bore, 530mm stroke, G1/4 port, and mounting accessory. The -S suffix means a magnet is present for CS1-B/DS1-B sensors. If you need more force, the neighboring 50mm bore yields 982N push at 0.5MPa; if less is acceptable, the 32mm bore yields 402N. Because the 530mm stroke is long, use an external guide to prevent rod bending and side-load wear. A plain cylinder does not hold load on air loss—the cushion only decelerates—so for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X530S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI40 Standard Cylinder SI40X530S FAQ
Yes, the SI40X530S is discontinued. The direct replacement is the SAI40X530S. It is dimensionally interchangeable per ISO 15552, matching the 40mm bore, 530mm stroke, 628N force, G1/4 port, and mounting interface.
The 40mm bore features a G1/4 port and M12x1.25 rod thread. It delivers 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, and a theoretical max of 128kgf at 1.0MPa. Speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X530S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X530S replacement — usually within 7-8 hours.