This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X230, 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 SI40X230
The AirTAC Airtac SI40 Standard Cylinder SI40X230 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 230mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X230, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke230 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X230
- 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 SI40X230
The AirTAC SI40X230 is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 230mm stroke. Delivering 628N push force at 0.5MPa via a G1/4 port, it is replaced by the SAI40X230. This direct upgrade shares the exact ISO 15552 mounting interface, M12x1.25 rod thread and 27mm cushions.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. This non-magnet SKU cannot take a sensor; legacy CS1-B/DS1-B switches required the -S option. SAI adds SAIL lock and SAIF valve variants the SI lacked.
Airtac SI40 Standard Cylinder SI40X230 Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X230 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X230 |
| Bore size | Ø40 mm |
| Stroke | 230 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 SAI40X230 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 SAI40X230 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 SI40X230
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×230 | 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 SI40X230 Is Used
Package Diverting
Pushes cartons at 30-800mm/s on packaging lines using the 628N thrust class.
Pallet Gauging
Positions pallets in fixtures via the ISO 15552 interface before wrapping.
Small Part Ejection
Ejects moulded parts from presses using the 230mm stroke and 528N pull force.
Replacing the Airtac SI40 Standard Cylinder SI40X230 with the SAI40X230
To replace the SI40X230, order SAI40X230 to retain the 40mm bore, 230mm stroke, G1/4 port and ISO 15552 mounting. Choose rod material (carbon, SUS420J2 or SUS304) and seal (NBR or Viton H for 150C). This non-S SKU lacks a magnet so cannot accept a sensor. For sizing, a 32mm bore yields 402N push at 0.5MPa, while a 50mm bore yields 982N. At 230mm stroke, guide external rods to prevent side-load bending. The air cushion only decelerates; for load holding on air loss use an external pilot check valve or the SAIL lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X230
- ✓ 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 SI40X230 FAQ
Yes, the AirTAC SI40X230 is discontinued. The direct replacement is the SAI40X230, which shares the identical ISO 15552 mounting interface, 40mm bore, 230mm stroke, 628N force and G1/4 port.
It has a G1/4 port. Force ratings are: 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, 1130N push at 0.9MPa, and a maximum theoretical force of 128kgf at 1.0MPa.
Request a Quote for the SAI40X230
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X230 replacement — usually within 7-8 hours.