This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X1015S, 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 SI40X1015S
The AirTAC Airtac SI40 Standard Cylinder SI40X1015S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 1015mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X1015S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke1015 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X1015S
- 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 SI40X1015S
The AirTAC SI40X1015S is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 1015mm stroke. Generating 628N push force at 0.5MPa, it is replaced by the SAI40X1015S direct upgrade. This successor matches the G1/4 port, M12x1.25 thread, and ISO 15552 mounting interface exactly, fitting existing fixtures.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. It also adds SAIL, SAIF, and BSAI lock variants the SI lacked. The 1015mm stroke exceeds the 1200mm standard maximum, requiring external guides to prevent rod bending.
Airtac SI40 Standard Cylinder SI40X1015S Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X1015S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X1015S |
| Bore size | Ø40 mm |
| Stroke | 1015 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 SAI40X1015S 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 SAI40X1015S 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 SI40X1015S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×1015 | 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 SI40X1015S Is Used
Long-Stroke Diversion
Pushes packages across a wide conveyor belt sorting line using the full 1015mm travel.
Vertical Material Lift
Raises components up to 32kg in a storage rack, operating safely within the 377N working load.
Pneumatic Slide Transfer
Shifts pallets between parallel assembly stations, requiring external guides to support the long rod.
Replacing the Airtac SI40 Standard Cylinder SI40X1015S with the SAI40X1015S
To replace the SI40X1015S, order the SAI40X1015S direct. Confirm the ISO 15552 interface, 40mm bore, 1015mm stroke, G1/4 port, and mounting accessory. The -S magnet uses legacy CS1-B/DS1-B switches; the SAI uses current AirTAC switches. Sizing both ways: a 32mm bore offers 402N push at 0.5MPa, while a 50mm bore offers 982N. A plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. Because the 1015mm stroke is nonstandard and long, add external guides to prevent rod bending and side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X1015S
- ✓ 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 SI40X1015S FAQ
Yes, the AirTAC SI40X1015S is discontinued. The direct replacement is the SAI40X1015S. It is dimensionally interchangeable per ISO 15552, matching the 40mm bore, 1015mm stroke, G1/4 port, and mounting interface.
The bore is 40mm with a G1/4 air port. Force output is 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, 1130N push at 0.9MPa, and a theoretical max of 128kgf at 1.0MPa. Speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X1015S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X1015S replacement — usually within 7-8 hours.