This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X10CA, 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 SI40X10CA
The AirTAC Airtac SI40 Standard Cylinder SI40X10CA is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 10mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X10CA, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke10 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X10CA
- 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 SI40X10CA
The AirTAC SI40X10CA is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 10mm stroke, delivering 628N push force at 0.5MPa via a G1/4 port. AirTAC replaced this legacy unit with the SAI40X10CA, a direct replacement matching the exact CA mounting interface, M12x1.25 rod thread, and force class.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. Because this specific SKU lacks the -S magnet, it cannot accept a position sensor.
Airtac SI40 Standard Cylinder SI40X10CA Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X10CA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X10CA |
| Bore size | Ø40 mm |
| Stroke | 10 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 SAI40X10CA 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 SAI40X10CA 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 SI40X10CA
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×10 | 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 SI40X10CA Is Used
Short-Stroke Clamping
Ideal for holding lightweight workpieces in machining fixtures where a 10mm movement and 628N force secure parts without overtaking the workspace.
Ejector Mechanism
Provides rapid 10mm ejection of small finished components from automated tooling, operating at speeds up to 800 mm/s.
Gate Diverting
Actuates small diverter gates on packaging lines, using the CA clevis mount to accommodate the pivot arc during the brief 10mm stroke.
Replacing the Airtac SI40 Standard Cylinder SI40X10CA with the SAI40X10CA
To replace the SI40X10CA, order the SAI40X10CA and verify the ISO 15552 CA clevis mounting, G1/4 port, and 10mm stroke. The SAI family also introduces SAIL (air-released lock), SAIF (built-in 4M valve), and BSAI (clamp-lock) variants absent in the SI line. Note that a standard cylinder drifts without live air; the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI variants. If downsizing, a 32mm bore yields 402N at 0.5MPa; if upsizing, a 50mm bore provides 982N. This 10mm stroke avoids rod-bending side-load issues seen in longer strokes.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X10CA
- ✓ 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 SI40X10CA FAQ
Yes, the SI40X10CA is discontinued. The direct replacement is the SAI40X10CA. It shares the identical ISO 15552 mounting interface, 40mm bore, 10mm stroke, G1/4 port, and CA clevis mounting, fitting directly into existing fixtures.
The 40mm bore uses a G1/4 air port. At 0.5MPa it delivers 628N push and 528N pull force. At 0.7MPa push is 879N, and at 0.9MPa it is 1130N. The theoretical maximum force is 128 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X10CA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X10CA replacement — usually within 7-8 hours.