This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X470S, 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 SI40X470S
The AirTAC SI40 Standard Cylinder SI40X470S 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 SAI40X470S, 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 → SAI40X470S
- 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 SI40X470S
The AirTAC SI40X470S is a discontinued double-acting ISO 15552 profile cylinder with a 40 mm bore and 470 mm stroke. Delivering 628 N push at 0.5 MPa through a G1/4 port, it is replaced by the SAI40X470S. This direct successor shares the exact interface, force, and mounting.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. You can also specify Viton H seals for high heat, or choose SAIL or BSAI lock variants the SI lacked.
Airtac SI40 Standard Cylinder SI40X470S Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X470S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X470S |
| 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 SAI40X470S 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 SAI40X470S 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 SI40X470S
| 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 SI40X470S Is Used
Material Diverting
Actuates routing gates on packaging lines, utilizing the 470 mm stroke to shift products between parallel conveyor belts smoothly.
Vertical Lifting
Raises lightweight tote boxes up to 32 kg in order-picking stations, benefiting from the 628 N push force at 0.5 MPa.
Part Ejection
Pushes machined aluminum components out of a CNC enclosure, relying on adjustable air cushions to decelerate at stroke end.
Replacing the Airtac SI40 Standard Cylinder SI40X470S with the SAI40X470S
To replace the SI40X470S, order the SAI40X470S and confirm the ISO 15552 mounting interface, 40 mm bore, 470 mm stroke, G1/4 port, and magnet (-S) for CS1-B/DS1-B switches. If you need more force, the 50 mm bore offers 982 N push at 0.5 MPa; if less is required, the 32 mm bore provides 402 N. Because the 470 mm stroke is long, use external guides to prevent rod bending and side-load wear. A plain cylinder drifts on air loss, so for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X470S
- ✓ 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 SI40X470S FAQ
Yes, the SI40X470S is discontinued. The direct replacement is the AirTAC SAI40X470S. It is dimensionally interchangeable per ISO 15552, maintaining the same 40 mm bore, 470 mm stroke, G1/4 port, and mounting fixtures.
It features a G1/4 air port and M12x1.25 rod thread. 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. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X470S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X470S replacement — usually within 7-8 hours.