This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X360, 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 SI40X360
The AirTAC SI40 Standard Cylinder SI40X360 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 360mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X360, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke360 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X360
- 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 SI40X360
The AirTAC SI40X360 is a discontinued double-acting ISO 15552 profile cylinder featuring a 40mm bore and 360mm stroke. Delivering 628N push force at 0.5MPa via a G1/4 port, it is superseded by the SAI40X360 direct replacement, sharing identical mounting, bore, and output force.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and longevity. For sensing, note this no-S SKU lacks a magnet and cannot take a switch.
Airtac SI40 Standard Cylinder SI40X360 Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X360 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X360 |
| Bore size | Ø40 mm |
| Stroke | 360 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 SAI40X360 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 SAI40X360 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 SI40X360
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×360 | 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 SI40X360 Is Used
Package Diversion
Actuates routing gates on packaging lines, utilizing the 628N push force to deflect cartons at high speed.
Clamp Actuation
Drives mid-force clamping mechanisms in CNC fixtures, relying on the 360mm stroke to clear the work zone.
Replacing the Airtac SI40 Standard Cylinder SI40X360 with the SAI40X360
To replace the SI40X360, order the SAI40X360 ensuring your ISO 15552 interface, 360mm stroke, and G1/4 port match. This non-magnetic SKU cannot accept CS1-B/DS1-B sensors. For higher loads, neighboring bores (32mm or 50mm) offer 402N or 982N push at 0.5MPa. The 360mm stroke requires external guides to prevent rod bending. For load holding, use an external pilot check valve or the SAIL/BSAI lock variants, as cushions only decelerate.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X360
- ✓ 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 SI40X360 FAQ
Yes, the SI40X360 is discontinued. The direct replacement is the SAI40X360, offering the same ISO 15552 mounting interface, 40mm bore, 360mm stroke, and G1/4 port.
The G1/4 port bore delivers 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, and a maximum theoretical force of 128kgf at 1.0MPa.
Request a Quote for the SAI40X360
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X360 replacement — usually within 7-8 hours.