This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X363, 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 SI40X363
The AirTAC Airtac SI40 Standard Cylinder SI40X363 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 363mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X363, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke363 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X363
- 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 SI40X363
The AirTAC SI40X363 is a discontinued double-acting ISO 15552 profile cylinder with a 40 mm bore and 363 mm stroke. It delivers 628 N push force at 0.5 MPa via a G1/4 port. The direct replacement is the SAI40X363, matching the interface, bore, stroke, force, and mounting.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. Note this SKU lacks a magnet and cannot take a sensor.
Airtac SI40 Standard Cylinder SI40X363 Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X363 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X363 |
| Bore size | Ø40 mm |
| Stroke | 363 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 SAI40X363 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 SAI40X363 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 SI40X363
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×363 | 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 SI40X363 Is Used
Package Diversion
Pushes lightweight cartons at 30-800 mm/s on sorting lines, utilizing the 628 N push force for reliable actuation without overwhelming the payload.
Pallet Stopper Gate
Acts as a 363 mm stroke stop gate for pallet entry, handling the 32 kg vertical lift capacity safely while enduring frequent cycling.
Component Ejection
Ejects machined parts from a fixture using the 528 N pull force at 0.5 MPa, ensuring positive extraction within compact tooling spaces.
Replacing the Airtac SI40 Standard Cylinder SI40X363 with the SAI40X363
To replace this SI40X363 with the SAI40X363, verify the ISO 15552 mounting fixture, 40 mm bore, 363 mm stroke, G1/4 port (PT/G/NPT), and accessory type. If you need position sensing, this non-magnet SKU cannot accept a switch; you must order an SAI40X363S instead. For higher force, the neighbouring 50 mm bore provides 982 N push at 0.5 MPa, while dropping to 32 mm yields 402 N. Because the stroke is 363 mm, use an external guide to prevent rod bending and side loads. A plain cylinder drifts on air loss; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X363
- ✓ 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 SI40X363 FAQ
Yes, the SI40X363 is discontinued. The direct replacement is the AirTAC SAI40X363. It is dimensionally interchangeable per ISO 15552, retaining the same 40 mm bore, 363 mm stroke, 628 N force, G1/4 port, and mounting interface, so it fits existing fixtures directly.
This 40 mm bore cylinder features a G1/4 air port and M12x1.25 rod thread. The thrust ratings are: 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 maximum of 128 kgf at 1.0 MPa.
Request a Quote for the SAI40X363
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X363 replacement — usually within 7-8 hours.