This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X22, 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 SI40X22
The AirTAC SI40 Standard Cylinder SI40X22 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 22mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X22, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke22 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X22
- 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 SI40X22
The AirTAC SI40X22 is a discontinued double-acting ISO 15552 profile cylinder with a 40 mm bore and 22 mm stroke. It delivers 628 N push force at 0.5 MPa through a G1/4 port. AirTAC replaced this legacy unit with the SAI40X22, a direct replacement sharing the exact ISO 15552 mounting interface, bore, stroke, force, port and mounting accessories.
The SAI upgrade features a modernized piston seal using two Y-shaped one-way elements for low start-up pressure and extended life. For this non-magnet SKU, position sensing is not possible.
Airtac SI40 Standard Cylinder SI40X22 Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X22 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X22 |
| Bore size | Ø40 mm |
| Stroke | 22 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 SAI40X22 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 SAI40X22 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 SI40X22
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×22 | 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 SI40X22 Is Used
Short-Stroke Clamping
Ideal for holding light workpieces in machining fixtures using its 628 N push force over a compact 22 mm travel.
Ejector Stations
Provides rapid part ejection from molds and presses, operating at speeds between 30 and 800 mm/s.
Package Diverting
Drives small diverter arms on packaging lines where a 32 kg vertical lift capacity is sufficient.
Replacing the Airtac SI40 Standard Cylinder SI40X22 with the SAI40X22
To replace the SI40X22, order the SAI40X22 and confirm the ISO 15552 interface, 40 mm bore, 22 mm stroke, G1/4 port (PT/G/NPT thread options) and mounting accessory. This SKU lacks the -S magnet, so it cannot accept a CS1-B or DS1-B sensor. If you need more force, the 50 mm bore offers 982 N push at 0.5 MPa; if less is acceptable, the 32 mm bore provides 402 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for load holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X22
- ✓ 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 SI40X22 FAQ
Yes, the SI40X22 is discontinued. The direct replacement is the SAI40X22, which shares the identical ISO 15552 mounting interface, 40 mm bore, 22 mm stroke, output force and G1/4 port.
This double-acting cylinder has a G1/4 port and delivers 628 N push / 528 N pull at 0.5 MPa, 879 N push at 0.7 MPa, and 1130 N push at 0.9 MPa. The theoretical maximum force is 128 kgf at 1.0 MPa.
Request a Quote for the SAI40X22
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X22 replacement — usually within 7-8 hours.