This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X190, 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 SI40X190
The AirTAC SI40 Standard Cylinder SI40X190 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 SAI40X190, 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 → SAI40X190
- 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 SI40X190
The AirTAC SI40X190 is a discontinued double-acting ISO 15552 profile cylinder with a 40 mm bore and 190 mm stroke. It delivers 628 N push force at 0.5 MPa through a G1/4 port. The direct replacement is the SAI40X190, matching the exact interface, bore, stroke, force, port and mounting.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Note this non-magnet SKU cannot take a sensor; legacy CS1-B/DS1-B switches require an -S model.
Airtac SI40 Standard Cylinder SI40X190 Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X190 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X190 |
| 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 SAI40X190 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 SAI40X190 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 SI40X190
| 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 SI40X190 Is Used
Package Diversion
Pushes medium-weight cartons off a main conveyor line using 628 N of thrust at 0.5 MPa.
Clamp Actuation
Drives a 190 mm stroke clamping arm to secure aluminium extrusions for CNC machining.
Replacing the Airtac SI40 Standard Cylinder SI40X190 with the SAI40X190
To replace this SI40X190, order the SAI40X190. Confirm the ISO 15552 mounting interface, 40 mm bore, 190 mm stroke, G1/4 port (PT/G/NPT thread options) and your mounting accessory (LB, FA, TC, etc.). This SKU lacks a magnet, so it cannot accept position sensors; order an SAI40X190S if you need CS1-B/DS1-B switch tracking. For sizing, a 32 mm bore yields 402 N push at 0.5 MPa, while a 50 mm bore yields 982 N. Remember a plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant to hold loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X190
- ✓ 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 SI40X190 FAQ
Yes, the SI40X190 is discontinued. The direct replacement is the SAI40X190. It is dimensionally interchangeable per ISO 15552, retaining the same 40 mm bore, 190 mm stroke, output force, G1/4 port and mounting fixtures.
The 40 mm bore uses a G1/4 air port. 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.
Request a Quote for the SAI40X190
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X190 replacement — usually within 7-8 hours.