This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X80TC, 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 SI50 Standard Cylinder SI50X80TC
The AirTAC Airtac SI50 Standard Cylinder SI50X80TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 80mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X80TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke80 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X80TC
- 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 SI50 Standard Cylinder SI50X80TC
The AirTAC SI50X80TC is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm stroke, delivering a push force of 982 N at 0.5 MPa. It features a G1/4 port, an M16x1.5 rod thread, and a TC trunnion mount. Because this SKU lacks the -S magnet suffix, it cannot accept a position sensor.
You should order the direct replacement SAI50X80TC. It shares the exact ISO 15552 mounting interface, bore, stroke, output force, and port size. The SAI upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life.
Airtac SI50 Standard Cylinder SI50X80TC Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X80TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X80TC |
| Bore size | Ø50 mm |
| Stroke | 80 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M16×1.5 |
| 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, 30 mm |
| Max standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI50X80TC carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
The SAI50X80TC produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI50 Standard Cylinder SI50X80TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×80 | 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 SI50 Standard Cylinder SI50X80TC Is Used
Package Diverting
Uses the 80 mm stroke to push parcels cleanly between conveyor lanes with 982 N of push force at 0.5 MPa.
Clamp Actuation
Provides reliable holding pressure for mid-sized machining fixtures via the TC trunnion mount.
Pallet Stopper
Acts as a robust pneumatic stop for incoming pallets, absorbing kinetic energy using the adjustable cushions.
Replacing the Airtac SI50 Standard Cylinder SI50X80TC with the SAI50X80TC
To replace the discontinued SI50X80TC, specify the SAI50X80TC to retain the identical ISO 15552 TC trunnion mounting interface, 50 mm bore, 80 mm stroke, and G1/4 port. Confirm your thread standard (PT, G, or NPT) and note that this no-magnet SKU cannot support legacy CS1-B or DS1-B sensors. If you need more force, the neighbouring 63 mm bore provides 1559 N push at 0.5 MPa; if less is required, the 40 mm bore offers 628 N. Remember that a standard cylinder drifts without live air, as the adjustable 30 mm cushions only decelerate the load. For secure holding, use an external pilot check valve or explore the SAIL or BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X80TC
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI50 Standard Cylinder SI50X80TC FAQ
Yes, the AirTAC SI50X80TC is discontinued. The direct replacement is the SAI50X80TC. It is dimensionally interchangeable per the ISO 15552 mounting interface, maintaining the same 50 mm bore, 80 mm stroke, force, G1/4 port, and TC trunnion mount.
This double-acting cylinder uses a G1/4 air port. At 0.5 MPa it provides 982 N push and 825 N pull force. At 0.7 MPa the push force is 1374 N, and the theoretical maximum force is 200 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X80TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X80TC replacement — usually within 7-8 hours.