This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40AX105, 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 SI40AX105
The AirTAC Airtac SI40 Standard Cylinder SI40AX105 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 105mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40AX105, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke105 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40AX105
- 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 SI40AX105
The AirTAC SI40AX105 is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 105mm stroke. Delivering 628 N push force at 0.5 MPa via a G1/4 port, it is replaced by the SAI40AX105. This direct successor matches the bore, stroke, force, port and ISO 15552 mounting interface for existing fixtures.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The -A suffix specifies a SUS420J2 stainless steel rod for corrosion resistance. Without a -S magnet, this SKU cannot take a sensor.
Airtac SI40 Standard Cylinder SI40AX105 Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40AX105 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40AX105 |
| Bore size | Ø40 mm |
| Stroke | 105 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 SAI40AX105 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 SAI40AX105 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 SI40AX105
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×105 | 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 SI40AX105 Is Used
Stainless Rod Clamping
Clamps aluminum or machined parts in tooling where the SUS420J2 stainless rod resists moisture and coolant better than standard carbon steel.
Package Diverting
Pushes light cartons off a sorting line using 628 N of thrust at 0.5 MPa, fitting neatly into standard ISO 15552 conveyor mounting blocks.
Small Part Ejection
Ejects molded or stamped components from a press bed over a 105mm stroke, relying on adjustable end cushions to absorb kinetic energy.
Replacing the Airtac SI40 Standard Cylinder SI40AX105 with the SAI40AX105
To replace the SI40AX105, order the SAI40AX105. Confirm the ISO 15552 mounting interface (LB, FA, TC, etc.), the 105mm stroke, G1/4 port, and the SUS420J2 stainless rod (-A). Because this SKU lacks a -S suffix, it cannot accept CS1-B/DS1-B sensors; order a magnet-equipped version if position detection is needed. For force sizing, the 40mm bore yields 628 N push at 0.5 MPa. If less force is acceptable, a 32mm bore provides 402 N; if more is required, a 50mm bore offers 982 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates near stroke end. For load holding, use an external pilot check valve or explore the SAIL or BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40AX105
- ✓ 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 SI40AX105 FAQ
Yes, the SI40AX105 is discontinued. The direct replacement is the SAI40AX105. It shares the identical ISO 15552 mounting interface, 40mm bore, 105mm stroke, output force, G1/4 port, and SUS420J2 stainless rod specification. The SAI simply upgrades the piston seal to a two Y-shaped one-way element design for lower start-up pressure and longer life.
The 40mm bore uses a G1/4 air port and a 16mm rod. At 0.5 MPa it provides 628 N push and 528 N pull. At 0.7 MPa push is 879 N, and at 0.9 MPa it is 1130 N. The theoretical maximum force is 128 kgf at 1.0 MPa. Operating speed ranges from 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40AX105
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40AX105 replacement — usually within 7-8 hours.