This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X470, 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 SI40X470
The AirTAC Airtac SI40 Standard Cylinder SI40X470 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 470mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X470, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke470 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X470
- 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 SI40X470
The AirTAC SI40X470 is a discontinued double-acting ISO 15552 profile cylinder with a 40 mm bore and 470 mm stroke, delivering 628 N push force at 0.5 MPa. Because this legacy SI unit is end-of-life, AirTAC supplies the SAI40X470 as the direct replacement. It shares the exact same ISO 15552 mounting interface, G1/4 port, and 470 mm stroke, dropping cleanly into existing fixtures.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life. This SKU lacks a magnet (-S), so it cannot accept a CS1-B/DS1-B sensor. For high-temperature environments, Viton H seals extend operation to 150 C.
Airtac SI40 Standard Cylinder SI40X470 Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X470 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X470 |
| Bore size | Ø40 mm |
| Stroke | 470 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 SAI40X470 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 SAI40X470 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 SI40X470
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×470 | 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 SI40X470 Is Used
Package Diverting
Drives diverting arms on packaging lines, utilizing the 470 mm stroke to route boxes efficiently between adjacent conveyors.
Parts Ejection
Ejects machined components from fixtures, relying on the 628 N push force to clear parts without damaging surfaces.
Replacing the Airtac SI40 Standard Cylinder SI40X470 with the SAI40X470
To replace the SI40X470, order the SAI40X470 and confirm the ISO 15552 mounting interface, G1/4 port, and 470 mm stroke. Specify your mounting accessory (LB, FA, TC, etc.) and thread standard (PT, G, NPT). Since this SKU lacks a magnet, it cannot support position sensing; if sensing is required, order an SAI40X40S equivalent. When sizing, consider neighboring bores: a 32 mm bore yields 402 N push at 0.5 MPa, while a 50 mm bore provides 982 N. For this 470 mm stroke, add external guides to prevent rod bending and side-load wear. A plain cylinder does not hold load without live air; for load holding, use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X470
- ✓ 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 SI40X470 FAQ
Yes, the SI40X470 is discontinued. The direct replacement is the SAI40X470. It is dimensionally interchangeable per ISO 15552, retaining the same 40 mm bore, 470 mm stroke, G1/4 port, and mounting interface.
The bore is 40 mm with a G1/4 air port. Force output is 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 maximum of 128 kgf at 1.0 MPa.
Request a Quote for the SAI40X470
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X470 replacement — usually within 7-8 hours.