This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X195S, 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 SI40X195S
The AirTAC Airtac SI40 Standard Cylinder SI40X195S 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 SAI40X195S, 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 → SAI40X195S
- 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 SI40X195S
The AirTAC SI40X195S is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 195mm stroke. Delivering 628 N push force at 0.5 MPa through a G1/4 port, it is replaced by the SAI40X195S. This direct upgrade shares the exact ISO 15552 mounting interface, bore, stroke, force, port and accessories, fitting existing fixtures perfectly.
The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The -S suffix denotes a piston magnet for legacy CS1-B/DS1-B sensors. The SAI family also adds SAIL, SAIF and BSAI lock variants the SI lacked.
Airtac SI40 Standard Cylinder SI40X195S Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X195S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X195S |
| 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 SAI40X195S 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 SAI40X195S 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 SI40X195S
| 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 SI40X195S Is Used
Package Diverting
Pushes lightweight cartons off a sorting line using 628 N of thrust at 0.5 MPa with responsive 30-800 mm/s cycling.
Small Part Clamping
Secures machined components during light milling, where the 528 N pull force at 0.5 MPa provides stable holding.
Replacing the Airtac SI40 Standard Cylinder SI40X195S with the SAI40X195S
To replace the SI40X195S, order the SAI40X195S. Verify the ISO 15552 mounting interface, 40mm bore, 195mm stroke, G1/4 port (PT/G/NPT thread), and your mounting accessory (LB, FA, TC, etc.). The -S magnet is present for CS1-B/DS1-B switches; the SAI uses current AirTAC switches. Sizing both ways: a 32mm bore yields 402 N push at 0.5 MPa, while a 50mm bore yields 982 N. A plain cylinder does not hold load on air loss; the cushion only decelerates. For held loads use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. At 195mm stroke, side-load and rod-bending risks are low, but ensure guide alignment.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X195S
- ✓ 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 SI40X195S FAQ
Yes, the SI40X195S is discontinued. The direct replacement is the SAI40X195S. It shares the same ISO 15552 mounting interface, 40mm bore, 195mm stroke, output force, G1/4 port and mounting accessories, fitting existing fixtures perfectly.
This 40mm bore cylinder has a G1/4 air port and M12x1.25 rod thread. Force output is 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 max of 128 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X195S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X195S replacement — usually within 7-8 hours.