This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X155S, 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 SI80X155S
The AirTAC SI80 Standard Air Cylinder SI80X155S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 155mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X155S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke155 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X155S
- 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 SI80X155S
The AirTAC SI80X155S is a discontinued double-acting ISO 15552 profile cylinder featuring a 155 mm stroke and a 2513 N push force at 0.5 MPa. AirTAC replaced this legacy unit with the SAI80X155S. This direct upgrade matches the original G3/8 port, M20x1.5 rod thread, and ISO 15552 mounting interface, dropping directly into existing fixtures.
The SAI replacement introduces an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The -S suffix indicates a built-in piston magnet for legacy CS1-B/DS1-B sensors; the SAI family uses current AirTAC switches. Furthermore, the SAI line adds SAIL, SAIF, and BSAI lock or self-valve variants the SI series lacked.
Airtac SI80 Standard Air Cylinder SI80X155S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X155S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X155S |
| Bore size | Ø80 mm |
| Stroke | 155 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 SAI80X155S 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 SAI80X155S 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 SI80X155S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×155 | 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 SI80X155S 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.
Pallet Diversion
Uses the 155 mm stroke to push heavy pallets onto secondary packaging lines, handling a safe 1508 N working load.
Vertical Lift Gates
Raises material handling gates with a 128 kg vertical lift capacity, relying on the built-in magnet for position feedback.
Replacing the Airtac SI80 Standard Air Cylinder SI80X155S with the SAI80X155S
To replace the SI80X155S, order the SAI80X155S keeping the identical 80 mm bore, 155 mm stroke, G3/8 port, and ISO 15552 mounting accessories. Because 155 mm is a non-standard stroke, verify the exact extended length against your fixture. If you need to size both ways, neighboring bores (63 mm or 100 mm) alter the 0.5 MPa push force (1559 N or 3927 N). A plain double-acting cylinder drifts on air loss—the 36 mm adjustable air cushions only decelerate near stroke end. For load holding, specify an external pilot check valve, or select the SAIL or BSAI lock variant. Rod material options include carbon steel, SUS420J2 (A), or SUS304 (B); seal options include NBR N or high-temp Viton H.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X155S
- ✓ 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 SI80X155S FAQ
Yes, the SI80X155S is discontinued. The direct replacement is the SAI80X155S. It shares the identical ISO 15552 mounting interface, 80 mm bore, 155 mm stroke, output force, and G3/8 port, fitting existing fixtures perfectly.
The G3/8 port bore delivers a push force of 2513 N and pull of 2268 N at 0.5 MPa. 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 SAI80X155S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X155S replacement — usually within 7-8 hours.