This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X980S, 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 SI40X980S
The AirTAC Airtac SI40 Standard Cylinder SI40X980S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 980mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X980S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke980 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X980S
- 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 SI40X980S
The AirTAC SI40X980S is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 980mm stroke. It delivers 628N push force at 0.5MPa through a G1/4 port. The direct replacement is the SAI40X980S, matching the interface, bore, stroke, force, and mounting. The SAI upgrades the piston seal to two Y-shaped one-way elements for low start-up pressure and long life. It also adds SAIL, SAIF, and BSAI lock variants the SI lacked.
The -S suffix means this SKU includes a piston magnet for legacy CS1-B/DS1-B sensors. Because the 980mm stroke is long, prevent rod bending by using external guides to manage side loads.
Airtac SI40 Standard Cylinder SI40X980S Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X980S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X980S |
| Bore size | Ø40 mm |
| Stroke | 980 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 SAI40X980S 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 SAI40X980S 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 SI40X980S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×980 | 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 SI40X980S Is Used
Long-Stroke Diversion
Pushes packages across transfer lines with a 980mm reach, utilizing the 628N push force at 0.5MPa to overcome guide friction.
Vertical Material Lift
Raises lightweight totes up to 32kg in pick modules, requiring external guides to prevent rod bending over the long stroke.
Actuator Positioning
Moves tooling carriages linearly between stations, relying on the CS1-B/DS1-B sensors to confirm end-of-travel positions.
Replacing the Airtac SI40 Standard Cylinder SI40X980S with the SAI40X980S
To replace this SI40X980S, order the SAI40X980S. It drops into the exact same ISO 15552 mounting fixtures, keeping the 40mm bore, 980mm stroke, M12x1.25 rod thread, G1/4 port, and magnet. If you need more force, the neighbouring 50mm bore offers 982N push at 0.5MPa; if less is required, the 32mm bore provides 402N. For load holding, note that a standard cylinder drifts without live air—the cushion only decelerates. Use an external pilot check valve, or switch to the SAIL or BSAI lock variant. Due to the 980mm stroke, always support the load with external guides to avoid rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X980S
- ✓ 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 SI40X980S FAQ
Yes, the AirTAC SI40X980S is discontinued. The direct replacement is the SAI40X980S. It shares the exact same ISO 15552 mounting interface, 40mm bore, 980mm stroke, G1/4 port, and output force, so it fits existing fixtures perfectly.
This 40mm bore cylinder uses a G1/4 air port and features a 16mm rod with an M12x1.25 thread. 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 SAI40X980S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X980S replacement — usually within 7-8 hours.