This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X460, 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 SI40X460
The AirTAC Airtac SI40 Standard Cylinder SI40X460 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 460mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X460, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke460 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X460
- 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 SI40X460
The AirTAC SI40X460 is a discontinued double-acting ISO 15552 profile cylinder with a 40 mm bore and 460 mm stroke. It delivers 628 N push force at 0.5 MPa through a G1/4 port. AirTAC replaced this legacy unit with the SAI40X460, a direct upgrade retaining the exact ISO 15552 mounting interface, bore, stroke, and force.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This non-magnet SKU cannot accept a sensor, and the Viton H seal option expands the temperature range up to 150 C.
Airtac SI40 Standard Cylinder SI40X460 Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X460 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X460 |
| Bore size | Ø40 mm |
| Stroke | 460 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 SAI40X460 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 SAI40X460 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 SI40X460
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×460 | 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 SI40X460 Is Used
Package Diversion
Pushes medium-weight cartons off a main conveyor line using the 628 N thrust and 460 mm travel distance.
Pallet Handling
Actuates mid-stroke gating mechanisms in automated storage systems where ISO 15552 mounting is required.
Parts Ejection
Ejects machined aluminum components from a fixture, relying on adjustable air cushions to decelerate at stroke end.
Replacing the Airtac SI40 Standard Cylinder SI40X460 with the SAI40X460
To replace the SI40X460, order the SAI40X460, confirming the ISO 15552 mounting interface, 40 mm bore, 460 mm stroke, G1/4 port, and M12x1.25 rod thread. Because this is a non-magnet model, it cannot support legacy CS1-B/DS1-B sensors; add the -S suffix if position detection is needed. For sizing, the 628 N output at 0.5 MPa handles moderate loads, while a 50 mm bore offers greater thrust. At 460 mm stroke, use external guides to prevent rod bending and side-load damage. Note that a plain cylinder drifts on air loss; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X460
- ✓ 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 SI40X460 FAQ
Yes, the AirTAC SI40X460 is discontinued. The direct replacement is the SAI40X460, which shares the same ISO 15552 mounting interface, 40 mm bore, 460 mm stroke, output force, and G1/4 port size, fitting existing fixtures perfectly.
This 40 mm bore double-acting cylinder features a G1/4 air port. It delivers 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 maximum force of 128 kgf at 1.0 MPa.
Request a Quote for the SAI40X460
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X460 replacement — usually within 7-8 hours.