This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X970S, 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 SI40X970S
The AirTAC Airtac SI40 Standard Cylinder SI40X970S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 970mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X970S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke970 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X970S
- 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 SI40X970S
The AirTAC SI40X970S is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 970mm stroke. Delivering 628 N push force at 0.5 MPa via a G1/4 port, it is replaced by the SAI40X970S. This direct upgrade shares the exact ISO 15552 mounting interface, bore, stroke, force and port, fitting existing fixtures perfectly.
The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The SI -S magnet supports legacy CS1-B/DS1-B sensors, while the SAI family adds SAIL, SAIF and BSAI lock variants the SI lacked.
Airtac SI40 Standard Cylinder SI40X970S Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X970S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X970S |
| Bore size | Ø40 mm |
| Stroke | 970 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 SAI40X970S 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 SAI40X970S 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 SI40X970S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×970 | 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 SI40X970S Is Used
Long-Stroke Diversion
Pushes packages across transfer lines with a 970mm reach, utilizing the 628 N push force at 0.5 MPa to reliably index products.
Extended Axis Positioning
Shifts tooling carriages along extended machining beds, requiring external linear guides to prevent rod bending over the 970mm extension.
Replacing the Airtac SI40 Standard Cylinder SI40X970S with the SAI40X970S
To replace the SI40X970S, order the SAI40X970S. Verify your ISO 15552 mounting accessory (LB, FA, TC, etc.), the G1/4 air port, and the -S magnet for current AirTAC switches. Sizing both ways: a 32mm bore yields 402 N [email protected], while a 50mm bore yields 982 N. A plain cylinder drifts on air loss since cushions only decelerate; for load holding use an external pilot check valve or the SAIL/BSAI lock variant. At 970mm, prevent rod bending by guiding the load externally to avoid side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X970S
- ✓ 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 SI40X970S FAQ
Yes, the SI40X970S is discontinued. The direct replacement is the SAI40X970S. It shares the same ISO 15552 mounting interface, 40mm bore, 970mm stroke, force, and G1/4 port, fitting your existing fixtures perfectly.
This double-acting cylinder features a 16mm rod, M12x1.25 thread, 27mm cushion, and operates at 30-800 mm/s. Force ratings are: push 628 N and pull 528 N at 0.5 MPa, push 879 N at 0.7 MPa, push 1130 N at 0.9 MPa, and a theoretical max of 128 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X970S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X970S replacement — usually within 7-8 hours.