This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X600SN, 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 SI40X600SN
The AirTAC Airtac SI40 Standard Cylinder SI40X600SN is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 600mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X600SN, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke600 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X600SN
- 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 SI40X600SN
The AirTAC SI40X600SN is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 600mm stroke. Delivering 628N push force at 0.5MPa via a G1/4 port, it is directly replaced by the SAI40X600SN. This direct upgrade shares the exact interface, bore, stroke, force, and mounting fixtures.
The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The NBR seal handles -20 to +70C, while Viton H extends this to 150C. The built-in magnet works with legacy CS1-B/DS1-B sensors.
Airtac SI40 Standard Cylinder SI40X600SN Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X600SN |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X600SN |
| Bore size | Ø40 mm |
| Stroke | 600 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 SAI40X600SN 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 SAI40X600SN 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 SI40X600SN
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×600 | 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 SI40X600SN Is Used
Long-Stroke Diversion
Pushes packages across a 600mm conveyor lane using the 628N push force at 0.5MPa, requiring external guides to prevent rod bending over the long travel.
Component Ejection
Ejects machined parts from a fixture over a 600mm distance, using the adjustable 27mm air cushions to decelerate the payload smoothly at stroke end.
Replacing the Airtac SI40 Standard Cylinder SI40X600SN with the SAI40X600SN
To replace the SI40X600SN, order the SAI40X600SN. Verify the ISO 15552 mounting interface, 40mm bore, 600mm stroke, G1/4 port (PT/G/NPT thread), and mounting accessory. The S magnet enables CS1-B/DS1-B switches (the SAI uses current AirTAC switches). For sizing, a 32mm bore yields 402N push at 0.5MPa, while a 50mm bore yields 982N. Note: 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 variant. For the 600mm stroke, use external guides to prevent rod bending and side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X600SN
- ✓ 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 SI40X600SN FAQ
Yes, the AirTAC SI40X600SN is discontinued. The direct replacement is the SAI40X600SN. It is dimensionally interchangeable per ISO 15552, retaining the same 40mm bore, 600mm stroke, 628N force, G1/4 port, and mounting interface. You simply order the SAI equivalent.
The 40mm bore features a G1/4 air port and M12x1.25 rod thread. Force ratings are: 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. Operating speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X600SN
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X600SN replacement — usually within 7-8 hours.