This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X1030S, 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 SI40X1030S
The AirTAC Airtac SI40 Standard Cylinder SI40X1030S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 1030mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X1030S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke1030 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X1030S
- 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 SI40X1030S
The AirTAC SI40X1030S is a discontinued double-acting ISO 15552 profile cylinder with a 40 mm bore and 1030 mm stroke. Generating 628 N push force at 0.5 MPa, it is replaced directly by the SAI40X1030S. This direct upgrade shares the exact same G1/4 port, M12x1.25 rod thread, and ISO 15552 mounting interface. The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. For this long 1030 mm stroke, external guides are recommended to prevent rod bending.
The -S suffix indicates a piston magnet for legacy CS1-B/DS1-B sensors. The SAI family also introduces lock variants (SAIL, BSAI) and the SAIF self-valve option that the SI line lacked. Note that 1030 mm exceeds the 1200 mm standard limit, classifying it as a nonstandard stroke.
Airtac SI40 Standard Cylinder SI40X1030S Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X1030S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X1030S |
| Bore size | Ø40 mm |
| Stroke | 1030 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 SAI40X1030S 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 SAI40X1030S 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 SI40X1030S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×1030 | 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 SI40X1030S Is Used
Long-Stroke Material Transfer
Pushes workpieces between processing stations over a 1030 mm span, utilizing the 628 N push force at 0.5 MPa to move moderate loads efficiently.
Pneumatic Diverter Gating
Drives diverter arms on sorting conveyors, requiring the G1/4 port and 30-800 mm/s speed range to maintain swift, controlled package routing.
Replacing the Airtac SI40 Standard Cylinder SI40X1030S with the SAI40X1030S
To replace the SI40X1030S, order the SAI40X1030S direct, confirming the ISO 15552 mounting interface, 40 mm bore, 1030 mm stroke, G1/4 port, and magnet (-S). Because this is a nonstandard stroke exceeding the 1200 mm standard, ensure your external guides are sized to handle side loads and prevent rod bending over the extended 1030 mm travel. For sizing alternatives, neighboring bores (32 mm or 50 mm) offer different force classes; the 32 mm yields 402 N push at 0.5 MPa, while the 50 mm provides 982 N. A plain cylinder does not hold load without live air—the cushion only decelerates. For load holding on air loss, use an external rod lock, a pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X1030S
- ✓ 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 SI40X1030S FAQ
Yes, the SI40X1030S is discontinued. The direct replacement is the SAI40X1030S. It shares the same ISO 15552 mounting interface, 40 mm bore, 1030 mm stroke, output force, G1/4 port, and accessories, fitting directly into existing fixtures.
This double-acting cylinder delivers 628 N push and 528 N pull at 0.5 MPa, 879 N push at 0.7 MPa, and a theoretical max of 128 kgf at 1.0 MPa. It features a G1/4 port, operates at 30-800 mm/s, and has an adjustable air cushion of 27 mm at both ends.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X1030S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X1030S replacement — usually within 7-8 hours.