This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X150STC, 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 SI80X150STC
The AirTAC SI80 Standard Air Cylinder SI80X150STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 150mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X150STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke150 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X150STC
- 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 SI80X150STC
The AirTAC SI80X150STC is a discontinued double-acting ISO 15552 profile cylinder featuring an extruded aluminum barrel and a TC trunnion mount. Built for a 80 mm bore and 150 mm stroke, it delivers 2513 N push force at 0.5 MPa through a G3/8 port. The direct replacement is the SAI80X150STC, matching the bore, stroke, output force, port size, and ISO 15552 mounting interface for existing fixtures.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. This -S model includes a piston magnet for legacy CS1-B/DS1-B sensors, while the SAI family adds lock variants (SAIL, BSAI) absent in the original SI line.
Airtac SI80 Standard Air Cylinder SI80X150STC Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X150STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X150STC |
| Bore size | Ø80 mm |
| Stroke | 150 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 SAI80X150STC 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 SAI80X150STC 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 SI80X150STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×150 | 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 SI80X150STC Is Used
Press Fit Tooling
Drives 2513 N at 0.5 MPa to seat bearings and pins in automated machining centers using the TC trunnion pivot.
Replacing the Airtac SI80 Standard Air Cylinder SI80X150STC with the SAI80X150STC
To replace the SI80X150STC, order the SAI80X150STC. Verify your ISO 15552 TC trunnion mounting hardware, 80 mm bore, 150 mm stroke, G3/8 port threads (PT, G, or NPT), and the -S magnet requirement. The SAI accepts current AirTAC switches instead of the legacy CS1-B/DS1-B set. If you need more force, the 100 mm bore yields 3927 N push at 0.5 MPa; if less is acceptable, the 63 mm bore provides 1559 N. A plain cylinder drifts on air loss because the cushion only decelerates—use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for held loads. The 150 mm stroke is under the 300 mm side-load threshold, but always guide the rod to prevent bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X150STC
- ✓ 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 SI80X150STC FAQ
Yes, the SI80X150STC is discontinued. The direct replacement is the SAI80X150STC. It shares the identical ISO 15552 mounting interface, 80 mm bore, 150 mm stroke, 2513 N force, G3/8 port, and TC mount, fitting existing fixtures perfectly.
The 80 mm bore uses a G3/8 port. Force output is 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 SAI80X150STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X150STC replacement — usually within 7-8 hours.