This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X1600S, 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 SI40X1600S
The AirTAC Airtac SI40 Standard Cylinder SI40X1600S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 1600mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X1600S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke1600 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X1600S
- 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 SI40X1600S
The AirTAC SI40X1600S is a discontinued double-acting ISO 15552 profile cylinder featuring a 40mm bore, 1600mm stroke, and a G1/4 air port. Delivering 628N push force at 0.5MPa, it is replaced by the SAI40X1600S. This direct successor matches the exact bore, stroke, force, port, and ISO 15552 mounting interface, fitting existing fixtures perfectly.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. Because the 1600mm stroke exceeds the 1200mm standard maximum, it is a made-to-order non-standard item requiring external guides to prevent rod bending.
Airtac SI40 Standard Cylinder SI40X1600S Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X1600S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X1600S |
| Bore size | Ø40 mm |
| Stroke | 1600 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 SAI40X1600S 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 SAI40X1600S 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 SI40X1600S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×1600 | 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 SI40X1600S Is Used
Long-Reach Material Transfer
Drives extended pallet shuttles on packaging lines where a 1600mm travel distance is required to bridge separate machinery zones.
High-Bay Ejection Pusher
Actuates long-stroke ejection arms in automated storage systems, utilizing the 628N push force at 0.5MPa to clear heavy totes.
Extended Vertical Lowering
Lowers product handling platens over a 1.6m descent, requiring external guide rails to prevent rod deflection under the 32kg vertical load limit.
Replacing the Airtac SI40 Standard Cylinder SI40X1600S with the SAI40X1600S
To replace the SI40X1600S, order the SAI40X1600S, confirming the ISO 15552 mounting interface, 40mm bore, 1600mm non-standard stroke, G1/4 port, and the -S magnet for CS1-B/DS1-B legacy sensors (the SAI uses current AirTAC switches). For sizing alternatives, a 32mm bore yields 402N push at 0.5MPa, while a 50mm bore provides 982N. Note that a plain cylinder drifts on air loss as the cushion only decelerates; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. At 1600mm, external guides are critical to manage side-load and rod-bending risks.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X1600S
- ✓ 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 SI40X1600S FAQ
Yes, the AirTAC SI40X1600S is discontinued. The direct replacement is the SAI40X1600S. It shares the identical ISO 15552 mounting interface, 40mm bore, 1600mm stroke, output force, and G1/4 port, so it drops directly into existing fixtures.
The 40mm bore features a G1/4 port and M12x1.25 rod 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 force of 128kgf at 1.0MPa. Operating speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X1600S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X1600S replacement — usually within 7-8 hours.