This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X160, 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 SI40X160
The AirTAC Airtac SI40 Standard Cylinder SI40X160 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 160mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X160, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke160 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X160
- 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 SI40X160
The AirTAC SI40X160 is a discontinued double-acting ISO 15552 profile cylinder with a 40 mm bore and 160 mm stroke, delivering 628 N push force at 0.5 MPa. It features an extruded aluminum barrel, a 16 mm carbon steel rod, M12x1.25 rod thread, and a G1/4 air port. AirTAC replaced this legacy unit with the SAI40X160, a direct replacement matching the exact ISO 15552 mounting interface, bore, stroke, output force, and port size.
The SAI upgrade introduces a refined piston seal using two Y-shaped one-way elements for extended life and lower start-up pressure. For applications needing load holding, note that a standard cylinder drifts on air loss—the cushion only decelerates—so consider the SAIL or BSAI lock variants. This specific SKU lacks a magnet, so it cannot accept position sensors.
Airtac SI40 Standard Cylinder SI40X160 Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X160 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X160 |
| Bore size | Ø40 mm |
| Stroke | 160 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 SAI40X160 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 SAI40X160 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 SI40X160
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×160 | 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 SI40X160 Is Used
Package Diverting
Actuates routing gates on packaging lines, using the 160 mm stroke to push cartons cleanly between adjacent belt lanes.
Clamp Actuation
Provides reliable clamping force for light machining fixtures, delivering 628 N at 0.5 MPa to hold components in place.
Stopper Cylinder
Functions as a pneumatic stop in material handling systems, raising a 16 mm rod to halt pallet movement on rollers.
Replacing the Airtac SI40 Standard Cylinder SI40X160 with the SAI40X160
To replace the discontinued SI40X160, order the SAI40X160. Confirm the ISO 15552 mounting interface, 40 mm bore, 160 mm stroke, G1/4 port (PT/G/NPT thread options), and your mounting accessory (LB, FA, TC, etc.). Because this SKU has no -S magnet, it cannot support legacy CS1-B/DS1-B sensors; if sensing is required, specify an SAI40X160S. If more force is needed, the neighboring 50 mm bore offers 982 N push at 0.5 MPa; if less is needed, the 32 mm bore provides 402 N. Since this is a 160 mm stroke, ensure adequate guide support to prevent rod bending and side-load wear. For load-holding on air loss, select the SAIL air-released lock or BSAI clamp-lock variant, or use an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X160
- ✓ 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 SI40X160 FAQ
Yes, the SI40X160 is discontinued. The direct replacement is the AirTAC SAI40X160. It is dimensionally interchangeable per the ISO 15552 mounting interface, retaining the same 40 mm bore, 160 mm stroke, output force, and G1/4 port, so it fits existing fixtures perfectly.
The G1/4 port is fixed by the 40 mm bore. Force ratings are: 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 of 128 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa.
Request a Quote for the SAI40X160
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X160 replacement — usually within 7-8 hours.