This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X760STC, 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 SI50X760STC
The AirTAC Airtac SI50 Standard Cylinder SI50X760STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 760mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X760STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke760 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X760STC
- 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 SI50X760STC
The AirTAC SI50X760STC is a discontinued double-acting ISO 15552 profile cylinder with a 50 mm bore and 760 mm stroke. It delivers 982 N push force at 0.5 MPa via a G1/4 port. AirTAC replaced this legacy unit with the SAI50X760STC, a direct upgrade sharing the same ISO 15552 mounting interface, bore, stroke, force, port and TC trunnion mount.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. It also introduces SAIL, SAIF and BSAI lock variants absent in the SI line. The built-in magnet supports CS1-B/DS1-B switches, while a Viton H seal option extends heat resistance to 150 C.
Airtac SI50 Standard Cylinder SI50X760STC Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X760STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X760STC |
| Bore size | Ø50 mm |
| Stroke | 760 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 SAI50X760STC 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 SAI50X760STC 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 SI50X760STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×760 | 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 SI50X760STC Is Used
Long-Stroke Diversion
Drives a 760 mm pusher arm to reroute 50 kg pallets between parallel conveyor lines using the TC trunnion mount for pivot articulation.
Parts Ejection
Ejects machined aluminum components from a fixture, requiring the full 760 mm extension to clear the machine guarding.
Replacing the Airtac SI50 Standard Cylinder SI50X760STC with the SAI50X760STC
To replace the SI50X760STC, order the SAI50X760STC. Confirm the ISO 15552 TC trunnion interface, 50 mm bore, 760 mm stroke, G1/4 port (PT/G/NPT thread), and the -S magnet for CS1-B/DS1-B sensors. For sizing, the 50 mm bore yields 982 N push at 0.5 MPa; if less force is needed, step down to a 40 mm bore (628 N). If more force is required, step up to a 63 mm bore (1559 N). Because this is a 760 mm stroke, use an external guide to prevent rod bending and side-load damage. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for load holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X760STC
- ✓ 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 SI50X760STC FAQ
Yes, the AirTAC SI50X760STC is discontinued. The direct replacement is the SAI50X760STC. It shares the same ISO 15552 mounting interface, 50 mm bore, 760 mm stroke, G1/4 port, and TC trunnion mount, fitting existing fixtures perfectly.
This double-acting cylinder has a G1/4 port and delivers 982 N push and 825 N pull at 0.5 MPa. At 0.7 MPa it pushes 1374 N, and 1767 N at 0.9 MPa. The theoretical maximum force is 200 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X760STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X760STC replacement — usually within 7-8 hours.