This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X480S, 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 SI40X480S
The AirTAC Airtac SI40 Standard Cylinder SI40X480S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 480mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X480S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke480 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X480S
- 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 SI40X480S
The AirTAC SI40X480S is a discontinued double-acting ISO 15552 profile cylinder. Delivering 628 N push force at 0.5 MPa through a 40 mm bore and 480 mm stroke, it is replaced by the SAI40X480S. This direct successor shares the exact ISO 15552 mounting interface, G1/4 port, and output force, fitting existing fixtures perfectly.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The family adds SAIL, SAIF, and BSAI lock/valve variants the SI lacked. This -S unit uses CS1-B/DS1-B sensors; the SAI takes current AirTAC switches.
Airtac SI40 Standard Cylinder SI40X480S Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X480S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X480S |
| Bore size | Ø40 mm |
| Stroke | 480 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 SAI40X480S 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 SAI40X480S 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 SI40X480S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×480 | 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 SI40X480S Is Used
Material Diversion
Actuates routing gates on package lines, using the 480 mm stroke to shift products between parallel belts smoothly.
Storage Retrieval
Extends 480 mm to push totes from automated dense storage racks into outbound picking chutes.
Replacing the Airtac SI40 Standard Cylinder SI40X480S with the SAI40X480S
To replace the SI40X480S, order the SAI40X480S. Confirm the ISO 15552 interface, 40 mm bore, 480 mm stroke, G1/4 port (PT/G/NPT thread options), M12x1.25 rod thread, and mounting accessory (LB, FA, TC, etc.). The -S suffix means a magnet for CS1-B/DS1-B switches; the SAI replacement uses current AirTAC switches. For sizing, a 32 mm bore offers 402 N push at 0.5 MPa, while a 50 mm bore provides 982 N. At 480 mm, prevent rod bending by guiding the load externally. A plain cylinder drifts on air loss; for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X480S
- ✓ 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 SI40X480S FAQ
Yes, the SI40X480S is discontinued. The direct replacement is the SAI40X480S. It shares the same ISO 15552 mounting interface, 40 mm bore, 480 mm stroke, output force, and G1/4 port, so it drops directly into existing fixtures.
The 40 mm bore features a G1/4 air port. It delivers 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 SAI40X480S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X480S replacement — usually within 7-8 hours.