This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI40X80FA, 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 SI40X80FA
The AirTAC Airtac SI40 Standard Cylinder SI40X80FA is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 80mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI40X80FA, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke80 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAI40X80FA
- 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 SI40X80FA
The AirTAC SI40X80FA is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm stroke and FA flange mounting. Delivering 628 N push force at 0.5 MPa, it is replaced by the SAI40X80FA. This direct successor shares the exact same 40 mm bore, stroke, G1/4 port, output force and ISO 15552 mounting interface.
The SAI upgrade features a revised piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. For this non-magnet SKU, position sensing is not possible.
Airtac SI40 Standard Cylinder SI40X80FA Technical Specifications
| Model | Airtac SI40 Standard Cylinder SI40X80FA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI40X80FA |
| Bore size | Ø40 mm |
| Stroke | 80 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 SAI40X80FA 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 SAI40X80FA 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 SI40X80FA
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×80 | 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 SI40X80FA Is Used
Clamp Actuation
Provides reliable 628 N push force at 0.5 MPa for securing medium workpieces during machining operations.
Package Diverting
Drives 80 mm stroke diverting arms to reroute light-to-medium cartons on packaging lines.
Gate Control
Operates material flow gates using the FA flange mount to handle 32 kg vertical loads safely.
Replacing the Airtac SI40 Standard Cylinder SI40X80FA with the SAI40X80FA
To replace the SI40X80FA, order the SAI40X80FA. Verify the FA flange mounting, 40 mm bore, 80 mm stroke, and G1/4 port. Because this SKU lacks the -S magnet, it cannot accept CS1-B/DS1-B sensors. If you need position detection, specify a magnet-equipped SAI. If sizing up or down, the adjacent 32 mm bore yields 402 N push @0.5 MPa, while the 50 mm bore provides 982 N. Note that a plain cylinder drifts on air loss; for load holding, use an external pilot check valve or explore the SAIL lock and BSAI clamp-lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI40X80FA
- ✓ 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 SI40X80FA FAQ
Yes, the SI40X80FA is discontinued. The direct replacement is the SAI40X80FA. It matches the ISO 15552 mounting interface, 40 mm bore, 80 mm stroke, force, and G1/4 port, fitting existing fixtures perfectly.
This double-acting cylinder has a 16 mm rod, M12x1.25 thread, 27 mm cushions, and operates at 30-800 mm/s. Force ratings are: 628 N push and 528 N pull @0.5 MPa, 879 N push @0.7 MPa, 1130 N push @0.9 MPa, with a 128 kgf maximum @1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI40X80FA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI40X80FA replacement — usually within 7-8 hours.