This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X292S, 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 SI40X292S
The AirTAC Airtac SI40 Standard Cylinder SI40X292S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 292mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X292S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke292 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X292S
- 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 SI40X292S
The AirTAC SI40X292S is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 292mm stroke. It delivers 628 N push force at 0.5 MPa via a G1/4 port. The direct replacement is the SAI40X292S, matching the exact bore, stroke, force, port and ISO 15552 mounting interface.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure. The SAI family adds SAIL, SAIF and BSAI lock variants. This SI-SKU uses CS1-B/DS1-B sensors; SAI uses current AirTAC switches.
Airtac SI40 Standard Cylinder SI40X292S Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X292S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X292S |
| Bore size | Ø40 mm |
| Stroke | 292 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 SAI40X292S 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 SAI40X292S 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 SI40X292S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×292 | 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 SI40X292S Is Used
Package Diversion
Pushes medium-weight cartons off a main conveyor belt using the 628 N push force at 0.5 MPa, with the 292mm stroke clearing adjacent lanes.
Pallet Stopper Gate
Acts as an adjustable stop for pallets entering a wrapping station, relying on the ISO 15552 mounting interface for rigid fixture attachment.
Component Ejection
Ejects machined aluminium parts from a fixture, where the 32 kg vertical lift capacity and 27mm adjustable cushions handle soft end-of-stroke landing.
Replacing the Airtac SI40 Standard Cylinder SI40X292S with the SAI40X292S
To replace the SI40X292S, order the SAI40X292S. Confirm the ISO 15552 mounting interface, G1/4 port, M12x1.25 rod thread and the -S magnet requirement. Sizing both ways: a 32mm bore yields 402 N push at 0.5 MPa, while a 50mm bore yields 982 N. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock or pilot check valve for held loads, or specify the SAIL/BSAI lock variant. The 292mm stroke is nonstandard (standard increments skip it) and exceeds 300mm proximity, so ensure guide rails prevent rod bending under side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X292S
- ✓ 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 SI40X292S FAQ
Yes, the SI40X292S is discontinued. The direct replacement is the SAI40X292S. It is dimensionally interchangeable per ISO 15552, keeping the same 40mm bore, 292mm stroke, 628 N force, G1/4 port and mounting fixtures.
The 40mm bore uses a G1/4 port. Force output is 628 N push and 528 N pull at 0.5 MPa, 879 N push at 0.7 MPa, 1130 N push at 0.9 MPa, and a theoretical max of 128 kgf at 1.0 MPa. Speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X292S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X292S replacement — usually within 7-8 hours.