This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX250SH, 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 SI80BX250SH
The AirTAC SI80 Standard Air Cylinder SI80BX250SH is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 250mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX250SH, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke250 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX250SH
- 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 SI80BX250SH
The AirTAC SI80BX250SH is a discontinued double-acting ISO 15552 profile cylinder featuring a SUS304 stainless steel rod, a Viton H high-temperature seal (0-150 C), and a piston magnet. Delivering 2513 N push force at 0.5 MPa through its G3/8 port, its direct successor is the SAI80BX250SH. This current-production SAI model shares identical bore, stroke, force, and ISO 15552 mounting dimensions for seamless fixture integration.
The SAI upgrade introduces a refined piston seal using two Y-shaped one-way elements for lower start-up pressure and extended life. The SAI family also expands functionality with SAIL, SAIF, and BSAI lock variants absent from the legacy SI line.
Airtac SI80 Standard Air Cylinder SI80BX250SH Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX250SH |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX250SH |
| Bore size | Ø80 mm |
| Stroke | 250 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 SAI80BX250SH 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 SAI80BX250SH 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 SI80BX250SH
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×250 | 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 SI80BX250SH Is Used
High-Temp Forming Press
Ideal for actuating small presses or forming stations in heated zones up to 150 C, leveraging the Viton H seal and SUS304 rod for reliable 2513 N thrust.
Heavy Product Diversion
Provides robust 80mm bore push force to divert heavier pallets or packages on a 250mm stroke, with the G3/8 port ensuring rapid cycling at 30-800 mm/s.
Corrosive Fluid Handling
The SUS304 stainless rod makes this cylinder suitable for guiding or lifting components in washdown or mildly corrosive manufacturing environments.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX250SH with the SAI80BX250SH
To replace the SI80BX250SH, order the SAI80BX250SH. Verify that your existing setup matches the ISO 15552 mounting interface, the 80mm bore, the 250mm stroke, the G3/8 port, and the chosen mounting accessory. The -S denotes a magnet for legacy CS1-B/DS1-B sensors, which transitions to current AirTAC switches on the SAI. The -B and -H options specify the SUS304 rod and Viton H seal for high-temperature or corrosive environments. If sizing alternatives, the neighboring 63mm bore yields 1559 N push at 0.5 MPa, while the 100mm bore provides 3927 N. Note that a standard cylinder drifts without live air; the cushion only decelerates. For load holding, use an external pilot check valve, rod lock, or the SAIL/BSAI variant. At 250mm stroke, ensure guide alignment to prevent rod bending and side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX250SH
- ✓ 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 SI80BX250SH FAQ
Yes, the AirTAC SI80BX250SH is discontinued. The direct replacement is the SAI80BX250SH. It is a true ISO 15552 cylinder with identical 80mm bore, 250mm stroke, 2513 N force, G3/8 port, and mounting dimensions, fitting directly into your existing fixtures.
This 80mm bore cylinder features a G3/8 air port and a 25mm piston rod. The thrust ratings are 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, 4523 N push at 0.9 MPa, and a theoretical maximum of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX250SH
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX250SH replacement — usually within 7-8 hours.