This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40AX110, 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 SI40AX110
The AirTAC Airtac SI40 Standard Cylinder SI40AX110 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 110mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40AX110, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke110 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40AX110
- 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 SI40AX110
The AirTAC SI40AX110 is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 110mm stroke, delivering 628N push force at 0.5MPa. The direct replacement is the SAI40AX110, matching the exact G1/4 port, M12x1.25 thread, and mounting interface.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The -A suffix indicates a SUS420J2 stainless rod for corrosion resistance. Without a -S magnet, this SKU cannot take a sensor.
Airtac SI40 Standard Cylinder SI40AX110 Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40AX110 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40AX110 |
| Bore size | Ø40 mm |
| Stroke | 110 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 SAI40AX110 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 SAI40AX110 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 SI40AX110
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×110 | 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 SI40AX110 Is Used
Compact Clamping
Secures mid-weight machined parts in CNC fixtures using 628N of thrust at 0.5MPa without deflection.
Package Diversion
Actuates 110mm stroke diverting gates on assembly lines to route medium product boxes efficiently.
Replacing the Airtac SI40 Standard Cylinder SI40AX110 with the SAI40AX110
To replace the SI40AX110, order the SAI40AX110 to retain the exact ISO 15552 interface, 40mm bore, 110mm stroke, and G1/4 port. Confirm your mounting accessory (LB, FA, TC) and thread type (PT/G/NPT). Since this SKU lacks the -S magnet, it cannot support CS1-B/DS1-B sensors; if position detection is needed, switch to a magnet-equipped SAI40X110S. For sizing, a 32mm bore yields 402N at 0.5MPa, while a 50mm bore yields 982N. Note that a plain cylinder drifts on air loss; for load holding, use an external pilot check valve or the SAIL/BSAI lock variants. The 110mm stroke is under 300mm, so rod bending is minimal, but always guide external loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40AX110
- ✓ 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 SI40AX110 FAQ
Yes, the SI40AX110 is discontinued. The direct replacement is the SAI40AX110. It is dimensionally interchangeable per ISO 15552, matching the 40mm bore, 110mm stroke, 628N force, and G1/4 port for a seamless fixture swap.
It features a G1/4 air port and M12x1.25 rod thread. Force output is 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.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40AX110
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40AX110 replacement — usually within 7-8 hours.