This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X830S, 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 SI40X830S
The AirTAC Airtac SI40 Standard Cylinder SI40X830S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 830mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X830S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke830 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X830S
- 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 SI40X830S
The AirTAC SI40X830S is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 830mm stroke. Delivering 628N push force at 0.5MPa through a G1/4 port, it is replaced by the SAI40X830S. This direct upgrade shares the exact interface, bore, stroke, force and mounting.
The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure. The -S magnet works with legacy CS1-B/DS1-B sensors, while Viton H seals raise heat to 150C.
Airtac SI40 Standard Cylinder SI40X830S Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X830S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X830S |
| Bore size | Ø40 mm |
| Stroke | 830 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 SAI40X830S 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 SAI40X830S 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 SI40X830S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×830 | 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 SI40X830S Is Used
Long-Stroke Diversion
Pushes packages across a 830mm transfer belt using the 628N push force at 0.5MPa, requiring external guides to prevent rod bending.
Material Ejection
Cycles at 30-800mm/s to eject machined aluminium parts, using the built-in magnet with CS1-B/DS1-B switches for position feedback.
Replacing the Airtac SI40 Standard Cylinder SI40X830S with the SAI40X830S
To replace this SI40X830S with the SAI40X830S, verify the ISO 15552 mounting interface, 830mm stroke, G1/4 port (PT/G/NPT) and your mounting accessory. The -S magnet allows CS1-B/DS1-B switches. Because this is an 830mm stroke, use external guides to prevent rod bending and side-load wear. For sizing, a 32mm bore yields 402N push at 0.5MPa, while a 50mm bore yields 982N. Note that a plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X830S
- ✓ 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 SI40X830S FAQ
Yes, the SI40X830S is discontinued. The direct replacement is the SAI40X830S, which shares the same ISO 15552 mounting interface, 40mm bore, 830mm stroke, force, G1/4 port and accessories.
It features a G1/4 air port and M12x1.25 rod thread. Force output is 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, 1130N push at 0.9MPa, and a theoretical max of 128kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X830S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X830S replacement — usually within 7-8 hours.