This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X222S, 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 SI40X222S
The AirTAC Airtac SI40 Standard Cylinder SI40X222S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 222mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X222S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke222 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X222S
- 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 SI40X222S
The AirTAC SI40X222S is a discontinued double-acting ISO 15552 profile cylinder with a 40 mm bore and 222 mm stroke. It delivers 628 N push force at 0.5 MPa via a G1/4 port. AirTAC replaced this legacy unit with the SAI40X222S, a direct upgrade retaining the exact ISO 15552 mounting interface, bore, stroke, output force, and port size to fit existing fixtures seamlessly.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The SAI family also introduces SAIL, SAIF, and BSAI lock variants absent in the SI line. Your -S suffix denotes a piston magnet for legacy CS1-B/DS1-B sensors.
Airtac SI40 Standard Cylinder SI40X222S Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X222S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X222S |
| Bore size | Ø40 mm |
| Stroke | 222 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 SAI40X222S 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 SAI40X222S 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 SI40X222S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×222 | 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 SI40X222S Is Used
Package Diversion
Actuates routing gates on packaging lines, utilizing the 628 N push force to redirect cartons reliably at cycle speeds within the 30-800 mm/s range.
Clamp Actuation
Provides repeatable clamping pressure for light machining fixtures, safely operating within the 377 N working load margin to hold components securely.
Replacing the Airtac SI40 Standard Cylinder SI40X222S with the SAI40X222S
To replace the discontinued SI40X222S, order the SAI40X222S. Confirm the ISO 15552 mounting interface, 40 mm bore, 222 mm stroke, G1/4 port (PT/G/NPT thread options), and your specific mounting accessory (LB, FA, TC, etc.). The -S magnet equates to legacy CS1-B/DS1-B sensors, while the SAI uses current AirTAC switches. For sizing both ways: a 32 mm bore yields 402 N push at 0.5 MPa, whereas a 50 mm bore yields 982 N. Because stroke is 222 mm, ensure adequate guide support to prevent rod bending under side loads. A plain cylinder drifts on air loss; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X222S
- ✓ 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 SI40X222S FAQ
Yes, the SI40X222S is discontinued. The direct replacement is the AirTAC SAI40X222S. It shares the identical ISO 15552 mounting interface, 40 mm bore, 222 mm stroke, output force, and G1/4 port, fitting existing fixtures perfectly while upgrading the piston seal.
The 40 mm bore uses 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, with a theoretical maximum of 128 kgf at 1.0 MPa. It features a 16 mm rod, M12x1.25 thread, and 27 mm adjustable cushions.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X222S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X222S replacement — usually within 7-8 hours.