This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X1190S, 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 SI40X1190S
The AirTAC Airtac SI40 Standard Cylinder SI40X1190S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 1190mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X1190S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke1190 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X1190S
- 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 SI40X1190S
The AirTAC SI40X1190S is a discontinued double-acting ISO 15552 profile cylinder with a 40mm bore and 1190mm stroke. It delivers 628N push force at 0.5MPa via a G1/4 port. AirTAC replaced this legacy unit with the SAI40X1190S, a direct upgrade retaining the exact ISO 15552 mounting interface, bore, stroke, force, and port size.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The SAI family also introduces lock and valve variants absent in the SI line, including SAIL, SAIF, and BSAI models.
Airtac SI40 Standard Cylinder SI40X1190S Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X1190S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X1190S |
| Bore size | Ø40 mm |
| Stroke | 1190 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 SAI40X1190S 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 SAI40X1190S 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 SI40X1190S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×1190 | 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 SI40X1190S Is Used
Long-Reach Transfer
Pushes products between conveyor lanes over a 1190mm span, utilizing the 628N push force at 0.5 MPa to shift packaged goods smoothly.
Vertical Material Lift
Elevates lightweight totes or bins up to 32kg in pick-and-place modules, relying on the magnetic piston for end-of-stroke confirmation.
Actuator Positioning
Moves tooling carriages along extended linear guides, where the 27mm adjustable air cushions decelerate the 16mm rod safely at travel ends.
Replacing the Airtac SI40 Standard Cylinder SI40X1190S with the SAI40X1190S
To replace the SI40X1190S, order the SAI40X1190S keeping the identical 40mm bore, 1190mm stroke, M12x1.25 rod thread, G1/4 port, and -S magnet for CS1-B/DS1-B sensors. Verify your ISO 15552 mounting accessory (LB, FA, TC) and thread standard (PT, G, NPT). If sizing down, a 32mm bore yields 402N at 0.5MPa; sizing up to 50mm provides 982N. Because this is a 1190mm stroke, external guides are strongly recommended to prevent rod bending and excessive side loads. A standard cylinder drifts without air; for load holding on pressure loss, specify the SAIL lock or BSAI clamp-lock variant, or use an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X1190S
- ✓ 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 SI40X1190S FAQ
Yes, the SI40X1190S is discontinued. The direct replacement is the SAI40X1190S. It shares the identical ISO 15552 mounting interface, 40mm bore, 1190mm stroke, output force, and G1/4 port, fitting directly into existing fixtures.
This 40mm bore double-acting cylinder uses a G1/4 air port. It generates 628N push and 528N pull at 0.5 MPa, 879N push at 0.7 MPa, 1130N push at 0.9 MPa, and a theoretical maximum of 128 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X1190S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X1190S replacement — usually within 7-8 hours.