This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X382S, 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 SI40X382S
The AirTAC Airtac SI40 Standard Cylinder SI40X382S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 382mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X382S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke382 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X382S
- 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 SI40X382S
The AirTAC SI40X382S is a discontinued double-acting ISO 15552 profile cylinder featuring a 40mm bore and 382mm stroke. It delivers 628 N push force at 0.5 MPa through a G1/4 port. AirTAC replaced this legacy unit with the SAI40X382S, a direct upgrade retaining the exact ISO 15552 mounting interface, stroke, output force, and porting.
The SAI successor introduces an upgraded piston seal with two Y-shaped one-way elements for lower start-up pressure and extended life. The SAI family also adds SAIL, SAIF, and BSAI lock variants absent from the SI line, and the built-in magnet supports legacy CS1-B/DS1-B switches.
Airtac SI40 Standard Cylinder SI40X382S Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X382S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X382S |
| Bore size | Ø40 mm |
| Stroke | 382 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 SAI40X382S 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 SAI40X382S 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 SI40X382S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×382 | 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 SI40X382S Is Used
Package Diverting
Pushes light to medium cartons on packaging lines where the 628 N push force and 382mm travel cleanly clear the conveyor belt.
Vertical Lift Stops
Raises or lowers 32 kg workpiece platforms using the 40mm bore, requiring external guides to manage the 382mm stroke.
Pneumatic Clamping
Secures light assemblies during machining, providing repeatable clamping with adjustable 27mm cushions at both ends.
Replacing the Airtac SI40 Standard Cylinder SI40X382S with the SAI40X382S
To replace the SI40X382S, order the SAI40X382S with the identical M12x1.25 rod thread, G1/4 port, and ISO 15552 mounting accessory (LB, FA, TC, etc.). The -S magnet equates to legacy CS1-B/DS1-B sensors, though the SAI uses current AirTAC switches. For sizing, the 32mm bore yields 402 N push at 0.5 MPa, while the 50mm bore yields 982 N; step up if force is insufficient. Because the 382mm stroke is long, use an external guide to prevent rod bending and side-load damage. A plain cylinder drifts without air; for load holding, use an external pilot check valve or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X382S
- ✓ 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 SI40X382S FAQ
Yes, the AirTAC SI40X382S is discontinued. The direct replacement is the SAI40X382S. It is dimensionally interchangeable per ISO 15552, matching the 40mm bore, 382mm stroke, G1/4 port, and mounting interface, but features an upgraded piston seal.
The 40mm bore uses a G1/4 air port. At 0.5 MPa it provides 628 N push and 528 N pull force. At 0.7 MPa push is 879 N, and at 0.9 MPa it is 1130 N. The theoretical maximum force is 128 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X382S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X382S replacement — usually within 7-8 hours.