This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X1800, 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 SI80X1800
The AirTAC SI80 Standard Air Cylinder SI80X1800 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 1800mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X1800, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke1800 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X1800
- 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 SI80X1800
The AirTAC SI80X1800 is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel and adjustable air cushions at both ends. Delivering 2513 N push force at 0.5 MPa via a G3/8 port, this 80 mm bore unit is succeeded by the SAI80X1800. The SAI upgrade is a direct replacement, preserving the exact ISO 15552 mounting interface, stroke, output force, and port size to fit existing fixtures seamlessly.
Because its 1800 mm stroke exceeds the 1500 mm standard maximum for this bore, this is a non-standard, made-to-order configuration requiring external guide support to prevent rod bending under side loads. The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Note this SKU lacks a magnet and cannot accept a sensor.
Airtac SI80 Standard Air Cylinder SI80X1800 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X1800 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X1800 |
| Bore size | Ø80 mm |
| Stroke | 1800 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 SAI80X1800 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 SAI80X1800 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 SI80X1800
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×1800 | 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 SI80X1800 Is Used
Long-Stroke Material Transfer
Moves heavy pallets or workpieces across extended machining cells, utilizing the 2513 N push force and 1800 mm travel distance with external linear guides.
High-Reach Vertical Elevator
Lifts components up to 128 kg in automated storage systems, relying on the 80 mm bore's substantial thrust and stable ISO 15552 mounting interface.
Large Assembly Press
Actuates large fixture clamps or presses over a wide span, taking advantage of the 3518 N push force available at 0.7 MPa for secure part seating.
Replacing the Airtac SI80 Standard Air Cylinder SI80X1800 with the SAI80X1800
To replace the discontinued SI80X1800, order the SAI80X1800. Verify your ISO 15552 mounting accessory (LB, FA, CA, TC, etc.), the G3/8 port thread (PT, G, or NPT), and the M20x1.5 rod-end thread. Since this is a non-standard 1800 mm stroke exceeding the 1500 mm maximum, ensure external linear guides are used to manage side loads and prevent rod bending over the long travel distance. If you need to size up or down, neighboring bores are 63 mm (1559 N push @0.5 MPa) and 100 mm (3927 N push @0.5 MPa). This plain cylinder cannot hold a load without live air; the cushions only decelerate. For load holding on air loss, use an external rod lock, a pilot check valve, or the SAIL/BSAI lock variants. If self-contained valve control is needed, the SAIF variant (bores 32-100) integrates a 4M valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X1800
- ✓ 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 SI80X1800 FAQ
Yes, the AirTAC SI80X1800 is discontinued. The direct replacement is the SAI80X1800. It is dimensionally interchangeable per the ISO 15552 mounting interface, retaining the same 80 mm bore, 1800 mm stroke, output force, G3/8 port, and mounting accessories.
This double-acting cylinder has a 25 mm rod, M20x1.5 thread, G3/8 port, and 36 mm adjustable cushions. It operates at 30-800 mm/s. Force 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 max of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X1800
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X1800 replacement — usually within 7-8 hours.