This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X760, 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 SI40X760
The AirTAC Airtac SI40 Standard Cylinder SI40X760 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 760mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X760, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke760 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X760
- 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 SI40X760
The AirTAC SI40X760 is a discontinued double-acting ISO 15552 profile cylinder with a 40 mm bore and 760 mm stroke. It delivers 628 N push force at 0.5 MPa via a G1/4 port. The direct replacement is the SAI40X760, matching the interface, stroke and force.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. This non-magnet SKU cannot take a sensor, unlike CS1-B equipped units. For high heat, Viton H seals raise the limit to 150 C.
Airtac SI40 Standard Cylinder SI40X760 Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X760 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X760 |
| Bore size | Ø40 mm |
| Stroke | 760 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 SAI40X760 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 SAI40X760 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 SI40X760
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×760 | 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 SI40X760 Is Used
Long-Stroke Diversion
Pushes packages across a 760 mm transfer gap with 628 N force at 0.5 MPa, requiring external guides to prevent rod bending.
Parts Ejection
Cycles at 30-800 mm/s to eject machined components, with the SAI direct fitting existing ISO 15552 fixtures perfectly.
Replacing the Airtac SI40 Standard Cylinder SI40X760 with the SAI40X760
To replace the SI40X760, order the SAI40X760 keeping the identical ISO 15552 mounting interface, 40 mm bore, 760 mm stroke, G1/4 port and M12x1.25 rod thread. Because this lacks the -S magnet, it cannot accept CS1-B/DS1-B sensors; order a magnet-equipped SAI if sensing is needed. At 0.5 MPa it yields 628 N push and 528 N pull; if undersized, the neighboring 50 mm bore gives 982 N push. The 760 mm stroke demands external guides to prevent rod bending and side loads. For load holding on air loss, add an external rod lock or pilot check valve, as cushions only decelerate. The SAI family also adds SAIL lock, SAIF valve and BSAI clamp variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X760
- ✓ 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 SI40X760 FAQ
Yes, the SI40X760 is discontinued. The direct replacement is the SAI40X760. It is dimensionally interchangeable per ISO 15552, retaining the same 40 mm bore, 760 mm stroke, 628 N force, G1/4 port and mounting interface.
The bore is 40 mm with a G1/4 air port and M12x1.25 rod thread. Force output is 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 max of 128 kgf at 1.0 MPa.
Request a Quote for the SAI40X760
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X760 replacement — usually within 7-8 hours.