This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X1000, 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 SI40X1000
The AirTAC SI40 Standard Cylinder SI40X1000 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 1000mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X1000, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke1000 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X1000
- 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 SI40X1000
The AirTAC SI40X1000 is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 1000mm stroke. It delivers 628N push force at 0.5MPa via a G1/4 port. AirTAC replaced this legacy unit with the SAI40X1000, a direct upgrade sharing the exact ISO 15552 mounting interface, bore, stroke, force and port size.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. This SKU lacks a magnet (-S), so it cannot accept a CS1-B/DS1-B sensor. For load holding, note that the air cushion only decelerates; use an external rod lock or pilot check valve.
Airtac SI40 Standard Cylinder SI40X1000 Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X1000 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X1000 |
| Bore size | Ø40 mm |
| Stroke | 1000 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 SAI40X1000 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 SAI40X1000 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 SI40X1000
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×1000 | 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 SI40X1000 Is Used
Long-Stroke Material Transfer
Drives goods between processing stations over a 1000mm travel distance where a 628N push force at 0.5MPa is sufficient for horizontal indexing.
Pallet Push-Off Assembly
Acts as a diverter arm in packaging lines, utilizing the 40mm bore profile cylinder to push lightweight items safely onto adjacent conveyors.
Replacing the Airtac SI40 Standard Cylinder SI40X1000 with the SAI40X1000
To replace the SI40X1000, order the SAI40X1000. Verify your ISO 15552 mounting accessory (LB, FA, FB, CA, CB, TC), the G1/4 port thread (PT, G or NPT) and the M12x1.25 rod thread. Because this 1000mm stroke approaches the 1200mm standard limit, add external guides to prevent rod bending and side-load damage. If you need more force, the neighbouring 50mm bore provides 982N push at 0.5MPa; if less is required, the 32mm bore offers 402N. For self-holding loads, explore the SAIL or BSAI lock variants, as standard cylinders drift without live air. This non-magnet version cannot support position sensing.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X1000
- ✓ 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 SI40X1000 FAQ
Yes, the SI40X1000 is discontinued. The direct replacement is the AirTAC SAI40X1000. It shares the identical ISO 15552 mounting interface, 40mm bore, 1000mm stroke, 628N output force, and G1/4 port, fitting directly into existing fixtures.
The 40mm bore uses a G1/4 air port and an M12x1.25 rod thread. Force ratings are: 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. Operating speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X1000
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X1000 replacement — usually within 7-8 hours.