This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40AX195S, 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 SI40AX195S
The AirTAC Airtac SI40 Standard Cylinder SI40AX195S 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 SAI40AX195S, 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 → SAI40AX195S
- 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 SI40AX195S
The AirTAC SI40AX195S is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 195mm stroke. Featuring a SUS420J2 stainless steel rod and a G1/4 port, it delivers 628 N push force at 0.5 MPa. AirTAC replaced this EOL unit with the SAI40AX195S, a direct replacement sharing the exact ISO 15552 mounting interface, bore, stroke, output force, and port size.
The SAI upgrade features an advanced piston seal with two Y-shaped one-way elements for low start-up pressure and long life. For applications needing load holding on air loss, the SAI family introduces SAIL, SAIF, and BSAI lock variants absent in the SI line. The built-in magnet supports legacy CS1-B/DS1-B sensors.
Airtac SI40 Standard Cylinder SI40AX195S Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40AX195S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40AX195S |
| 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 SAI40AX195S 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 SAI40AX195S 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 SI40AX195S
| 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 SI40AX195S Is Used
Package Diversion
Actuates routing gates on packaging lines, utilizing the 195mm stroke and 32 kg vertical lift capacity to redirect cartons reliably.
Stainless Rod Clamping
Secures moisture-exposed workpieces in machining fixtures, leveraging the SUS420J2 rod for corrosion resistance and 528 N pull force.
Pallet Stopper Arms
Controls pallet flow on roller conveyors by raising and lowering stop blades, safely handling loads within the 377 N working limit.
Replacing the Airtac SI40 Standard Cylinder SI40AX195S with the SAI40AX195S
To replace the discontinued SI40AX195S, order the SAI40AX195S. Confirm the ISO 15552 mounting interface, the 40mm bore, 195mm stroke, G1/4 port, and the -A SUS420J2 stainless rod option. Because the -S magnet is present, specify current AirTAC switches to replace the legacy CS1-B/DS1-B sensors. When sizing, a 50mm bore offers 982 N push at 0.5 MPa, while a 32mm bore provides 402 N. Note that a plain cylinder drifts on air loss; the cushion only decelerates. For secure load holding, use an external pilot check valve or explore the SAIL or BSAI lock variants. Operating speed is 30-800 mm/s.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40AX195S
- ✓ 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 SI40AX195S FAQ
Yes, the SI40AX195S is discontinued. The direct replacement is the AirTAC SAI40AX195S. It shares the identical ISO 15552 mounting interface, 40mm bore, 195mm stroke, G1/4 port, and force ratings, fitting existing fixtures perfectly while adding an upgraded piston seal.
This double-acting cylinder provides 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. It operates at speeds of 30-800 mm/s, features a G1/4 port, and includes a 27 mm adjustable air cushion at both ends.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40AX195S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40AX195S replacement — usually within 7-8 hours.