This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X570S, 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 SI40X570S
The AirTAC Airtac SI40 Standard Cylinder SI40X570S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 570mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X570S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke570 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X570S
- 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 SI40X570S
The AirTAC SI40X570S is a discontinued double-acting ISO 15552 profile cylinder with a 40 mm bore and 570 mm stroke. Delivering 628 N push force at 0.5 MPa through a G1/4 port, it is directly replaced by the SAI40X570S. This direct successor matches the exact ISO 15552 mounting interface, bore, stroke, output force and port size, fitting existing fixtures perfectly.
The SAI upgrade features a refined 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 from the SI line, and your existing -S magnet works with legacy CS1-B/DS1-B sensors.
Airtac SI40 Standard Cylinder SI40X570S Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X570S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X570S |
| Bore size | Ø40 mm |
| Stroke | 570 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 SAI40X570S 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 SAI40X570S 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 SI40X570S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×570 | 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 SI40X570S Is Used
Material Diversion
Actuates routing gates on packaging lines, utilizing the 628 N push force to redirect products at high cycling speeds.
Vertical Lowering
Controls the gravity-assisted descent of a 32 kg payload, requiring external guides due to the 570 mm stroke length.
Pallet Handling
Drives mid-stroke positioning stops in storage systems, taking advantage of the adjustable 27 mm air cushions.
Replacing the Airtac SI40 Standard Cylinder SI40X570S with the SAI40X570S
To replace the SI40X570S, order the SAI40X570S. Confirm the ISO 15552 mounting interface, the 40 mm bore, 570 mm stroke, G1/4 port (PT/G/NPT thread options) and your specific mounting accessory. Because this is a 570 mm stroke, use external guides to prevent rod bending and side-load damage. Sizing options: drop to a 32 mm bore for lighter loads, or step up to a 50 mm bore (982 N push @0.5 MPa) if more force is needed. A plain cylinder drifts on air loss; for load holding, use an external pilot check valve or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X570S
- ✓ 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 SI40X570S FAQ
Yes, the SI40X570S is discontinued. The direct replacement is the AirTAC SAI40X570S. It shares the identical ISO 15552 mounting interface, 40 mm bore, 570 mm stroke, output force and G1/4 port, fitting your existing fixtures without modification.
The 40 mm bore features a G1/4 port and a 16 mm rod. At 0.5 MPa it provides 628 N push and 528 N pull force. At 0.7 MPa the push force is 879 N, and at 0.9 MPa it is 1130 N. The theoretical maximum force is 128 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X570S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X570S replacement — usually within 7-8 hours.