This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X1415S, 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 SI40X1415S
The AirTAC Airtac SI40 Standard Cylinder SI40X1415S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 1415mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X1415S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke1415 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X1415S
- 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 SI40X1415S
The AirTAC SI40X1415S is a discontinued double-acting ISO 15552 profile cylinder. It delivers 628 N push force at 0.5 MPa through a 40 mm bore and G1/4 port. Because 1415 mm exceeds the 1200 mm standard stroke limit, this is a non-standard made-to-order length requiring external guides to prevent rod bending. The direct replacement is the SAI40X1415S, matching the ISO 15552 mounting interface, stroke, force, and port.
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 absent in the SI line. This -S model includes a piston magnet for CS1-B/DS1-B switches; the SAI uses current AirTAC switches.
Airtac SI40 Standard Cylinder SI40X1415S Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X1415S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X1415S |
| Bore size | Ø40 mm |
| Stroke | 1415 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 SAI40X1415S 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 SAI40X1415S 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 SI40X1415S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×1415 | 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 SI40X1415S Is Used
Long-Reach Transfer
Pushes products across wide conveyor gaps using the 1415 mm stroke, relying on external guides to absorb side loads.
High-Bay Ejection
Ejects cartons from deep storage racking where the 628 N push force at 0.5 MPa is sufficient for light loads.
Material Dispense
Actuates a dispensing head over a long axis, with the G1/4 port ensuring adequate flow for 30-800 mm/s speeds.
Replacing the Airtac SI40 Standard Cylinder SI40X1415S with the SAI40X1415S
To replace the SI40X1415S, order the SAI40X1415S direct. Confirm the ISO 15552 mounting interface, 40 mm bore, 1415 mm non-standard stroke, G1/4 port, and the -S magnet. The 16 mm rod uses an M12x1.25 thread. When sizing, a 50 mm bore gives 982 N push at 0.5 MPa, while a 32 mm bore gives 402 N. The 1415 mm stroke exceeds the 1200 mm standard maximum, so use external guides to prevent rod bending. A plain cylinder drifts on air loss as the cushion only decelerates; for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X1415S
- ✓ 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 SI40X1415S FAQ
Yes, the SI40X1415S is discontinued. The direct replacement is the SAI40X1415S. It is dimensionally interchangeable per ISO 15552, matching the 40 mm bore, 1415 mm stroke, 628 N force, G1/4 port, and mounting interface.
The 40 mm bore uses a G1/4 port. Force ratings are: 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 SAI40X1415S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X1415S replacement — usually within 7-8 hours.