This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X1160S, 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 SI40X1160S
The AirTAC Airtac SI40 Standard Cylinder SI40X1160S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 1160mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X1160S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke1160 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X1160S
- 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 SI40X1160S
The AirTAC SI40X1160S is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 1160mm stroke. Generating 628N push force at 0.5MPa via a G1/4 port, it is replaced by the SAI40X1160S. This direct upgrade matches the exact ISO 15552 mounting interface, bore, stroke, force, and accessories. The SAI features an upgraded piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life. The SAI family also introduces SAIL, SAIF, and BSAI lock variants absent in the SI line.
The 1160mm stroke exceeds the 1200mm standard maximum, requiring external guides to prevent rod bending. The -S suffix indicates a piston magnet for legacy CS1-B/DS1-B sensors. Note that a plain cylinder drifts without live air; use a pilot check valve or SAIL/BSAI lock for load holding.
Airtac SI40 Standard Cylinder SI40X1160S Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X1160S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X1160S |
| Bore size | Ø40 mm |
| Stroke | 1160 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 SAI40X1160S 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 SAI40X1160S 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 SI40X1160S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×1160 | 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 SI40X1160S Is Used
Extended Stroke Transfer
Pushes workpieces between distant machining stations on an automated line using the 1160mm stroke and 628N push force at 0.5MPa.
Multi-Position Sorting
Diverts packages across wide diverter arms, relying on the G1/4 port for rapid actuation and the magnet for position feedback.
Replacing the Airtac SI40 Standard Cylinder SI40X1160S with the SAI40X1160S
To replace the discontinued SI40X1160S, order the SAI40X1160S direct. Confirm the ISO 15552 interface, 40mm bore, 1160mm stroke, G1/4 port, and mounting accessories. The -S magnet equates to legacy CS1-B/DS1-B sensors, while the SAI uses current AirTAC switches. At 0.5MPa it yields 628N push; if undersized, the neighbouring 50mm bore provides 982N. Because the 1160mm stroke is nonstandard and long, add external guides to prevent rod bending and side-load damage. A plain cylinder does not hold load on air loss; the cushion only decelerates. For secure holding, specify an external rod lock, a pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X1160S
- ✓ 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 SI40X1160S FAQ
Yes, the SI40X1160S is discontinued. The direct replacement is the SAI40X1160S. It shares the identical ISO 15552 mounting interface, 40mm bore, 1160mm stroke, output force, and G1/4 port, fitting existing fixtures perfectly while upgrading the piston seal.
It features a G1/4 air port and a 16mm rod. At 0.5MPa it provides 628N push and 528N pull force. At 0.7MPa push is 879N, and 1130N at 0.9MPa. The theoretical maximum force is 128kgf at 1.0MPa. Speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X1160S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X1160S replacement — usually within 7-8 hours.