This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X1230SH, 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 SI40X1230SH
The AirTAC Airtac SI40 Standard Cylinder SI40X1230SH is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 1230mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X1230SH, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke1230 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X1230SH
- 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 SI40X1230SH
The AirTAC SI40X1230SH is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 1230mm stroke. Because 1230mm exceeds the 1200mm standard maximum for this bore, it is a non-standard, made-to-order length. It delivers 628 N push force at 0.5 MPa through a G1/4 port. The direct replacement is the SAI40X1230SH, matching the bore, stroke, force, port, and ISO 15552 mounting interface exactly.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This unit includes the -S magnet for CS1-B/DS1-B legacy sensors and the -H Viton seal, extending the operating temperature from -20...+70 C up to 0-150 C.
Airtac SI40 Standard Cylinder SI40X1230SH Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X1230SH |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X1230SH |
| Bore size | Ø40 mm |
| Stroke | 1230 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 SAI40X1230SH 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 SAI40X1230SH 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 SI40X1230SH
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×1230 | 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 SI40X1230SH Is Used
Long-Stroke Diversion
Drives large packaging pop-up arms or diverter gates over a 1230mm travel distance, requiring external guide rails to prevent rod bending.
High-Temp Ejection
Ejects molded parts near heat zones using the -H Viton seal rated for 0-150 C, pushing light loads with 628 N force at 0.5 MPa.
Replacing the Airtac SI40 Standard Cylinder SI40X1230SH with the SAI40X1230SH
To replace the SI40X1230SH, order the SAI40X1230SH direct. Verify your ISO 15552 mounting accessories (LB, FA, CA, TC), the G1/4 port, and the M12x1.25 rod thread. The -S magnet enables current AirTAC switches (replacing legacy CS1-B/DS1-B), and the -H Viton seal handles 0-150 C environments. Because this is a 1230mm non-standard stroke exceeding the 1200mm standard, add external guides to prevent rod bending and side-load damage. If sizing down, a 32mm bore gives 402 N push at 0.5 MPa; if sizing up, a 50mm bore yields 982 N. Note: air cushions only decelerate the piston; they do not hold load on air loss. For secure holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X1230SH
- ✓ 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 SI40X1230SH FAQ
Yes, the AirTAC SI40X1230SH is discontinued. The direct replacement is the SAI40X1230SH. It is dimensionally interchangeable per ISO 15552, retaining the same 40mm bore, 1230mm stroke, G1/4 port, and mounting interface to fit existing fixtures directly.
The 40mm bore uses a G1/4 air port and features a 16mm rod with an M12x1.25 thread. It delivers 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, and a theoretical maximum of 128 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X1230SH
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X1230SH replacement — usually within 7-8 hours.