This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X480, 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 SI40X480
The AirTAC Airtac SI40 Standard Cylinder SI40X480 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 SAI40X480, 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 → SAI40X480
- 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 SI40X480
The AirTAC SI40X480 is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 480mm stroke. Delivering 628 N push force at 0.5 MPa via a G1/4 port, it is replaced by the SAI40X480. This direct upgrade shares the exact ISO 15552 mounting interface, bore, stroke, force, port and accessories.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. Because this specific SI40X480 SKU lacks a magnet (-S), it cannot accept a CS1-B/DS1-B sensor. For loads, the cushion only decelerates; use SAIL or BSAI lock variants for holding.
Airtac SI40 Standard Cylinder SI40X480 Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X480 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X480 |
| 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 SAI40X480 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 SAI40X480 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 SI40X480
| 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 SI40X480 Is Used
Material Diverting
Actuates routing gates on package lines, using the 480mm stroke to shift products between parallel conveyor belts smoothly.
Vertical Lift Stops
Raises and lowers physical stops or pallet positioning pins in automated storage systems within the 32 kg vertical lift margin.
Case Pushing
Pushes filled cartons into sealing machinery, utilizing the 628 N push force at 0.5 MPa to move moderate loads reliably.
Replacing the Airtac SI40 Standard Cylinder SI40X480 with the SAI40X480
To replace the SI40X480, order the SAI40X480. Confirm the ISO 15552 mounting interface, 40mm bore, 480mm stroke, G1/4 port (PT/G/NPT thread options), and mounting accessory (LB, FA, FB, CA, CB, TC, etc.). This SKU has no magnet (-S) and cannot take a sensor. For sizing both ways: a 32mm bore yields 402 N push @0.5 MPa, while a 50mm bore yields 982 N. A plain cylinder drifts on air loss; for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. With a 480mm stroke, prevent rod bending by using an external guide to manage side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X480
- ✓ 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 SI40X480 FAQ
Yes, the SI40X480 is discontinued. The direct replacement is the SAI40X480. It is dimensionally interchangeable per ISO 15552, retaining the same 40mm bore, 480mm stroke, 628 N force, G1/4 port and mounting interface.
The 40mm bore uses a G1/4 air 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; with a theoretical max of 128 kgf at 1.0 MPa.
Request a Quote for the SAI40X480
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X480 replacement — usually within 7-8 hours.