This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40AX195, 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 SI40AX195
The AirTAC Airtac SI40 Standard Cylinder SI40AX195 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 195mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40AX195, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke195 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40AX195
- 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 SI40AX195
The AirTAC SI40AX195 is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 195mm stroke. It delivers 628 N push and 528 N pull at 0.5 MPa through a G1/4 port. AirTAC replaced this EOL unit with the SAI40AX195, a direct sharing the exact interface, force, and mounting.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. This -A variant uses a SUS420J2 stainless rod, and lacks a magnet so it cannot take a sensor. For high heat, Viton H seals raise the limit to 150 C.
Airtac SI40 Standard Cylinder SI40AX195 Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40AX195 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40AX195 |
| Bore size | Ø40 mm |
| Stroke | 195 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 SAI40AX195 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 SAI40AX195 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 SI40AX195
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×195 | 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 SI40AX195 Is Used
Stainless Rod Actuation
Ideal for light machinery requiring the SUS420J2 corrosion-resistant rod, pushing loads safely up to 377 N.
Material Diversion
Provides reliable 195mm stroke gating and diverting on standard ISO 15552 fixture mounts.
Replacing the Airtac SI40 Standard Cylinder SI40AX195 with the SAI40AX195
To replace the SI40AX195, order the SAI40AX195. Verify the ISO 15552 mounting interface, 40mm bore, 195mm stroke, G1/4 port, and SUS420J2 stainless rod. This non-magnetic SKU cannot accept a CS1-B or DS1-B switch. If you need more force than the 879 N at 0.7 MPa, step up to a 50mm bore; if less, a 32mm bore gives 563 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external pilot check valve or explore the SAIL or BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40AX195
- ✓ 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 SI40AX195 FAQ
Yes, the SI40AX195 is discontinued. The direct replacement is the SAI40AX195. It shares the identical ISO 15552 mounting interface, 40mm bore, 195mm stroke, force, and G1/4 port, fitting existing fixtures perfectly.
This 40mm bore cylinder features a G1/4 air port and M12x1.25 rod thread. It generates 628 N push and 528 N pull at 0.5 MPa, 879 N push at 0.7 MPa, 1130 N at 0.9 MPa, and a theoretical max of 128 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40AX195
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40AX195 replacement — usually within 7-8 hours.