This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40AX190, 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 SI40AX190
The AirTAC Airtac SI40 Standard Cylinder SI40AX190 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 190mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40AX190, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke190 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40AX190
- 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 SI40AX190
The AirTAC SI40AX190 is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 190mm stroke. Delivering 628N push and 528N pull at 0.5MPa, it features a Ø16mm rod, M12x1.25 thread, and a G1/4 port. The direct replacement is the SAI40AX190, matching the interface, force, and mounting.
This SKU has no magnet (-S) and cannot take a sensor. The SAI upgrade uses two Y-shaped piston seals for low start-up pressure. The -A rod is SUS420J2 stainless steel.
Airtac SI40 Standard Cylinder SI40AX190 Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40AX190 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40AX190 |
| Bore size | Ø40 mm |
| Stroke | 190 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 SAI40AX190 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 SAI40AX190 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 SI40AX190
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×190 | 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 SI40AX190 Is Used
Stainless Rod Actuation
Leverages the SUS420J2 rod for corrosion-resistant pushing in washdown or mildly chemical manufacturing environments.
Mid-Force Diverting
Provides 628N push at 0.5MPa to reliably divert packages or sort workpieces along a 190mm stroke path.
Replacing the Airtac SI40 Standard Cylinder SI40AX190 with the SAI40AX190
To replace the SI40AX190, order the SAI40AX190. Verify the ISO 15552 mounting interface, 190mm stroke, G1/4 port, and SUS420J2 stainless rod. Since this SKU lacks a magnet, it cannot accept a CS1-B/DS1-B sensor; if sensing is needed, switch to an -S SAI model. For sizing, a neighbouring 32mm bore yields 402N push at 0.5MPa, while a 50mm bore yields 982N. Note that a plain cylinder drifts on air loss; for load holding, use an external pilot check valve or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40AX190
- ✓ 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 SI40AX190 FAQ
Yes, the SI40AX190 is discontinued. The direct replacement is the SAI40AX190. It matches the ISO 15552 mounting dimensions, 40mm bore, 190mm stroke, G1/4 port, and output force, fitting existing fixtures perfectly.
This double-acting cylinder has a G1/4 port. It delivers 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, 1130N push at 0.9MPa, and a theoretical max of 128kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40AX190
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40AX190 replacement — usually within 7-8 hours.