This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX275, 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 SI80AX275
The AirTAC SI80 Standard Air Cylinder SI80AX275 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 275mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80AX275, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke275 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80AX275
- 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 SI80AX275
The AirTAC SI80AX275 is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 275mm stroke. It delivers 2513 N push force at 0.5 MPa and features a SUS420J2 stainless piston rod (-A) alongside a G3/8 air port. As this legacy unit is end-of-life, the direct replacement is the SAI80AX275, matching the ISO 15552 mounting interface, bore, stroke, output force, port and mounting accessories.
The SAI upgrade introduces a refined piston seal using two Y-shaped one-way elements for lower start-up pressure and longer life. Because this specific SI SKU lacks a magnet, it cannot accept a position switch. Note that a plain cylinder drifts on air loss; for load holding, consider the SAIL lock or BSAI clamp-lock variants.
Airtac SI80 Standard Air Cylinder SI80AX275 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX275 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX275 |
| Bore size | Ø80 mm |
| Stroke | 275 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 SAI80AX275 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 SAI80AX275 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 SI80AX275
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×275 | 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 SI80AX275 Is Used
Mid-Tonnage Pressing
Applies the 2513 N push force at 0.5 MPa for seating bearings or light stamping tasks within automated machinery.
Product Diversion
Drives a 275mm stroke diverting arm to route packages on a production line, utilizing the SUS420J2 rod for moisture resistance.
Vertical Lifting
Hoists components up to the 128 kg safe vertical lift threshold, requiring external guidance to manage side loads at this stroke.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX275 with the SAI80AX275
To replace the discontinued SI80AX275, order the SAI80AX275. Verify your existing fixture's ISO 15552 mounting interface, the 275mm stroke, G3/8 port, and mounting accessory (LB, FA, TC, etc.). This unit has an -A SUS420J2 stainless rod and no magnet, meaning it cannot support CS1-B/DS1-B sensors; if sensing is needed, specify an SAI with the -S magnet option. For sizing alternatives, neighbouring bores (63mm or 100mm) offer 1559 N or 3927 N push at 0.5 MPa respectively. At 275mm stroke, ensure adequate guide support to prevent rod bending and side loads. A standard cylinder does not hold load without live air; the cushion only decelerates. For secure holding, use an external pilot check valve or explore the SAIL air-released lock and BSAI clamp-lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX275
- ✓ 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 SI80AX275 FAQ
Yes, the SI80AX275 is discontinued. The direct replacement is the SAI80AX275. It is dimensionally interchangeable per ISO 15552, retaining the same 80mm bore, 275mm stroke, G3/8 port, and mounting interface, but adds an upgraded two Y-shaped element piston seal.
This 80mm bore cylinder has a G3/8 air port. The thrust figures 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 SAI80AX275
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80AX275 replacement — usually within 7-8 hours.