This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X400SH, 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 SI80 Standard Air Cylinder SI80X400SH
The AirTAC SI80 Standard Air Cylinder SI80X400SH is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 400mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X400SH, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke400 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X400SH
- 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 SI80 Standard Air Cylinder SI80X400SH
The AirTAC SI80X400SH is a discontinued double-acting ISO 15552 profile cylinder with a 400 mm stroke. It delivers 2513 N push force at 0.5 MPa through a G3/8 port. The direct replacement is the SAI80X400SH, matching the bore, stroke, force, port and ISO 15552 mounting interface. This SAI model features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The -H suffix indicates a Viton H seal, extending the operating temperature range from -20 to +70 C up to 0-150 C.
The -S suffix confirms a built-in piston magnet for legacy CS1-B/DS1-B sensors, while the SAI replacement family uses current AirTAC switches. The SAI line also introduces the SAIL air-released lock and BSAI clamp-lock variants that the legacy SI series lacked.
Airtac SI80 Standard Air Cylinder SI80X400SH Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X400SH |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X400SH |
| Bore size | Ø80 mm |
| Stroke | 400 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| 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, 36 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI80X400SH carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
The SAI80X400SH produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI80 Standard Air Cylinder SI80X400SH
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×400 | 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 SI80 Standard Air Cylinder SI80X400SH Is Used
Hot-Stamp Press Ejection
Handles part ejection in high-temperature stamping presses, leveraging the Viton H seal to withstand ambient heat up to 150 C while moving components 400 mm.
Heavy Pallet Diversion
Pushes loaded pallets across transfer lines using 2513 N of thrust at 0.5 MPa, safely handling weights near the 128 kg vertical lift threshold.
High-Temp Logistics Sorting
Actuates sorting gates in high-temperature logistics hubs, relying on the 80 mm bore and ISO 15552 profile to fit existing fixture mounts.
Replacing the Airtac SI80 Standard Air Cylinder SI80X400SH with the SAI80X400SH
To replace the discontinued SI80X400SH, order the SAI80X400SH direct equivalent, verifying the ISO 15552 mounting interface, 80 mm bore, 400 mm stroke, G3/8 port (PT/G/NPT thread options), and your specific mounting accessory (LB, FA, TC, etc.). The -S magnet and -H Viton high-temperature seal must be specified. If downsizing, a 63 mm bore yields 1559 N push at 0.5 MPa; if upsizing, a 100 mm bore provides 3927 N. Note that a plain cylinder does not hold load on air loss—the cushion only decelerates—so for load holding consider the SAIL or BSAI lock variants, or an external pilot check valve. Because the 400 mm stroke is long, prevent rod bending by using an external guide to manage side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X400SH
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI80 Standard Air Cylinder SI80X400SH FAQ
Yes, the SI80X400SH is discontinued. The direct replacement is the SAI80X400SH. It is dimensionally interchangeable per ISO 15552, retaining the same 80 mm bore, 400 mm stroke, force, G3/8 port and mounting interface.
The 80 mm bore uses a G3/8 port. At 0.5 MPa it provides 2513 N push and 2268 N pull force. At 0.7 MPa push is 3518 N, and at 0.9 MPa it is 4523 N. The theoretical maximum force is 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X400SH
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X400SH replacement — usually within 7-8 hours.