This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40AX160S, 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 SI40AX160S
The AirTAC Airtac SI40 Standard Cylinder SI40AX160S 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 SAI40AX160S, 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 → SAI40AX160S
- 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 SI40AX160S
The AirTAC SI40AX160S is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 160mm stroke. It delivers 628N push force at 0.5MPa via a G1/4 port. The direct replacement is the SAI40AX160S, matching the exact ISO 15552 mounting interface, bore, stroke, output force and porting for seamless fixture integration.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This SI40AX160S variant uses a SUS420J2 stainless rod (-A) and a magnet (-S) for CS1-B/DS1-B sensors.
Airtac SI40 Standard Cylinder SI40AX160S Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40AX160S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40AX160S |
| 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 SAI40AX160S 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 SAI40AX160S 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 SI40AX160S
| 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 SI40AX160S Is Used
Component Clamping
Secures machined parts during milling with a safe 377N working load, utilizing the SUS420J2 stainless rod for corrosion resistance in wet coolant environments.
Package Diverting
Actuates routing gates on packaging lines, delivering 628N push force at 0.5MPa to reliably redirect moderate-weight cartons at speeds up to 800mm/s.
Replacing the Airtac SI40 Standard Cylinder SI40AX160S with the SAI40AX160S
To replace the SI40AX160S, order the SAI40AX160S. Verify the ISO 15552 mounting interface, 40mm bore, 160mm stroke, G1/4 port (PT/G/NPT), SUS420J2 rod (-A) and magnet (-S). If you need more force, the 50mm bore offers 982N push at 0.5MPa; if less is needed, the 32mm bore provides 402N. A plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external pilot check valve or the SAIL/BSAI lock variants. At 160mm stroke, side-load is low, but ensure rod alignment to prevent premature seal wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40AX160S
- ✓ 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 SI40AX160S FAQ
Yes, the SI40AX160S is discontinued. The direct replacement is the SAI40AX160S. It shares the same ISO 15552 mounting interface, 40mm bore, 160mm stroke, output force, G1/4 port and accessories, fitting existing fixtures perfectly.
This 40mm bore cylinder uses a G1/4 air port. It generates 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, 1130N push at 0.9MPa, and a theoretical maximum of 128kgf at 1.0MPa. It operates at speeds of 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40AX160S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40AX160S replacement — usually within 7-8 hours.