This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X180SCA, 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 SI40X180SCA
The AirTAC Airtac SI40 Standard Cylinder SI40X180SCA is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 180mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X180SCA, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke180 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X180SCA
- 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 SI40X180SCA
The AirTAC SI40X180SCA is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 180mm stroke. It delivers 628N push force at 0.5MPa via a G1/4 port. The direct replacement is the SAI40X180SCA, matching the bore, stroke, force, and CA clevis mounting interface exactly.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family also adds lock variants (SAIL, BSAI) absent in the SI line.
Airtac SI40 Standard Cylinder SI40X180SCA Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X180SCA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X180SCA |
| Bore size | Ø40 mm |
| Stroke | 180 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 SAI40X180SCA 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 SAI40X180SCA 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 SI40X180SCA
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×180 | 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 SI40X180SCA Is Used
Clamp Actuation
Provides 628N of push force at 0.5MPa to secure mid-weight workpieces during machining operations.
Package Diversion
Uses the 180mm stroke and CA clevis mount to push cartons smoothly across transfer lines.
Replacing the Airtac SI40 Standard Cylinder SI40X180SCA with the SAI40X180SCA
To replace the SI40X180SCA, order the SAI40X180SCA. Verify the ISO 15552 CA clevis mounting, 180mm stroke, G1/4 port, and the -S magnet for CS1-B/DS1-B sensors (the SAI uses current AirTAC switches). If downsizing, a 32mm bore yields 402N at 0.5MPa; if upsizing, a 50mm bore provides 982N. A plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external pilot check valve or the SAIL/BSAI lock variant. At 180mm stroke, rod bending is minimal, but ensure guide alignment to prevent side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X180SCA
- ✓ 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 SI40X180SCA FAQ
Yes, the AirTAC SI40X180SCA is discontinued. The direct replacement is the SAI40X180SCA. It is dimensionally interchangeable per the ISO 15552 mounting interface, retaining the same 40mm bore, 180mm stroke, CA clevis mount, and G1/4 port.
This double-acting cylinder features a G1/4 air port. It delivers 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, 1130N push at 0.9MPa, and a theoretical maximum of 128kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X180SCA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X180SCA replacement — usually within 7-8 hours.