This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40AX60S, 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 SI40AX60S
The AirTAC Airtac SI40 Standard Cylinder SI40AX60S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 60mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40AX60S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke60 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40AX60S
- 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 SI40AX60S
The AirTAC SI40AX60S is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore, 60mm stroke, and a SUS420J2 stainless piston rod. Delivering 628 N push force at 0.5 MPa via a G1/4 port, it is replaced by the SAI40AX60S. This direct successor matches the exact interface, bore, stroke, force, and mounting, fitting existing fixtures perfectly.
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. Your -S magnet works with legacy CS1-B/DS1-B sensors, while the SAI uses current AirTAC switches.
Airtac SI40 Standard Cylinder SI40AX60S Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40AX60S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40AX60S |
| Bore size | Ø40 mm |
| Stroke | 60 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 SAI40AX60S 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 SAI40AX60S 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 SI40AX60S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×60 | 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 SI40AX60S Is Used
Stainless Rod Clamping
Ideal for mid-force clamping tasks where the SUS420J2 rod resists moisture and corrosion during repetitive part hold-down operations.
Short-Stroke Diverting
Provides reliable 60mm actuation for diverting small to medium packages on packaging lines using the 628 N push force at 0.5 MPa.
Replacing the Airtac SI40 Standard Cylinder SI40AX60S with the SAI40AX60S
To replace the SI40AX60S, order the SAI40AX60S. Verify the ISO 15552 mounting interface, 60mm stroke, G1/4 port (PT/G/NPT), and your -S magnet. The -A rod is SUS420J2 stainless steel. If sizing up, the 50mm bore offers 982 N push at 0.5 MPa; sizing down, the 32mm bore gives 402 N. For load holding, note a plain cylinder drifts on air loss—the cushion only decelerates. Use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. With a 60mm stroke, side-load risks are minimal, but always align guides to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40AX60S
- ✓ 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 SI40AX60S FAQ
Yes, the AirTAC SI40AX60S is discontinued. The direct replacement is the SAI40AX60S. It shares the identical ISO 15552 mounting interface, 40mm bore, 60mm stroke, output force, G1/4 port, and SUS420J2 stainless rod, fitting seamlessly into your existing fixtures.
This double-acting cylinder features a G1/4 air port and M12x1.25 rod thread. Theoretical forces 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; with a maximum force of 128 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40AX60S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40AX60S replacement — usually within 7-8 hours.