This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X960S, 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 SI50X960S
The AirTAC Airtac SI50 Standard Cylinder SI50X960S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 960mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X960S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke960 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X960S
- 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 SI50X960S
The AirTAC SI50X960S is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 960mm stroke. Delivering 982 N push force at 0.5 MPa, it features a G1/4 port, M16x1.5 rod thread, and a magnetic piston for CS1-B/DS1-B sensors. AirTAC replaced this legacy unit with the SAI50X960S.
The SAI50X960S is a direct replacement matching the ISO 15552 mounting interface, bore, output force, and port size. It upgrades the piston seal to two Y-shaped one-way elements for low start-up pressure and long life. If you need load holding on air loss, explore the SAIL or BSAI lock variants, as standard cushions only decelerate.
Airtac SI50 Standard Cylinder SI50X960S Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X960S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X960S |
| Bore size | Ø50 mm |
| Stroke | 960 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 SAI50X960S 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 SAI50X960S 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 SI50X960S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×960 | 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 SI50X960S Is Used
Long-Stroke Diversion
Executes 960mm linear pushes to reroute heavy packages on sorting conveyors, utilizing the 982 N thrust class.
Automated Assembly Transfer
Moves components between machining stations over a 960mm gap, relying on adjustable 30mm air cushions for end-of-stroke deceleration.
Replacing the Airtac SI50 Standard Cylinder SI50X960S with the SAI50X960S
To replace the SI50X960S, order the SAI50X960S. It drops directly into existing ISO 15552 fixtures with the same 50mm bore, 960mm stroke, G1/4 port, and mounting accessories. Retain the -S magnet option for current AirTAC switch compatibility. For sizing alternatives, neighboring bores like 40mm (628 N push @0.5) or 63mm (1559 N push @0.5) adjust force capacity. Note that a 960mm stroke demands external guide support to prevent rod bending and side-load damage. Because standard cylinders drift without live air, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants for secure load holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X960S
- ✓ 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 SI50X960S FAQ
Yes, the SI50X960S is discontinued. The direct replacement is the AirTAC SAI50X960S. It shares the identical ISO 15552 mounting interface, 50mm bore, 960mm stroke, output force, and G1/4 port, fitting existing fixtures perfectly while upgrading the piston seal.
This double-acting cylinder has a G1/4 air port and M16x1.5 rod thread. The thrust ratings are 982 N push and 825 N pull at 0.5 MPa, 1374 N push at 0.7 MPa, 1767 N push at 0.9 MPa, and a theoretical maximum of 200 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X960S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X960S replacement — usually within 7-8 hours.