This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X195, 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 SI40X195
The AirTAC Airtac SI40 Standard Cylinder SI40X195 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 SAI40X195, 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 → SAI40X195
- 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 SI40X195
The AirTAC SI40X195 is a discontinued double-acting ISO 15552 profile cylinder with a 40 mm bore and 195 mm stroke. It delivers 628 N push force at 0.5 MPa via a G1/4 port. The direct replacement is the SAI40X195, matching the bore, stroke, force, and ISO 15552 mounting interface exactly.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. For sensing, note this specific SI SKU lacks a magnet and cannot take a switch. For high heat, Viton H seals raise the limit to 150 C.
Airtac SI40 Standard Cylinder SI40X195 Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X195 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X195 |
| 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 SAI40X195 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 SAI40X195 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 SI40X195
| 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 SI40X195 Is Used
Package Diverting
Actuates routing gates on packaging lines where 628 N push at 0.5 MPa easily overcomes friction on cartons up to 32 kg.
Clamp Actuation
Provides reliable clamping force for light machining fixtures, utilizing the 27 mm adjustable air cushion to prevent end-of-stroke impact.
Stopper Cylinder
Functions as a pneumatic stop in material handling systems, holding pallets momentarily before release using its 195 mm stroke.
Replacing the Airtac SI40 Standard Cylinder SI40X195 with the SAI40X195
To replace the SI40X195, order the SAI40X195. Confirm the ISO 15552 mounting accessory (LB, FA, TC, etc.), the G1/4 port thread (PT/G/NPT), and the M12x1.25 rod end. This non-magnet SKU cannot accept CS1-B/DS1-B sensors. If sizing up, the 50 mm bore offers 982 N push at 0.5 MPa; if sizing down, the 32 mm bore provides 402 N. For load holding on air loss, the cushion only decelerates; use an external pilot check valve or the SAIL/BSAI lock variants. At 195 mm stroke, side-load is low, but ensure rigid guidance for heavy loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X195
- ✓ 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 SI40X195 FAQ
Yes, the SI40X195 is discontinued. The direct replacement is the AirTAC SAI40X195. It shares the identical ISO 15552 mounting interface, 40 mm bore, 195 mm stroke, G1/4 port, and output force, fitting existing fixtures perfectly.
The 40 mm bore features 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 maximum of 128 kgf at 1.0 MPa. Speed is 30-800 mm/s.
Request a Quote for the SAI40X195
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X195 replacement — usually within 7-8 hours.