This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID63X700S, 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.

The AirTAC Airtac SID Series Double-Rod Cylinder SID63X700S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 700mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID63X700S, which matches its ISO interface, bore, stroke, force and mounting.
The AirTAC SID63X700S is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends on one piston, making push and pull force equal at 1402 N @0.5 MPa, 1962 N @0.7 MPa, and 2523 N @0.9 MPa. This 63 mm bore uses a G3/8 air port, a 20 mm piston rod, and a 30 mm adjustable cushion at each end. The SID line is discontinued; the direct replacement is the SAID63X700S, sharing the same interface, stroke, and mounting.
The SAI upgrade uses a two Y-shaped one-way piston seal for low start-up pressure and long life. The -S suffix denotes a built-in piston magnet for legacy CS1-B/DS1-B switches. A plain cylinder does not hold loads on air loss; the cushion only decelerates near stroke end, so use an external rod lock for held loads.
| Model | Airtac SID Series Double-Rod Cylinder SID63X700S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID63X700S |
| Bore size | Ø63 mm |
| Stroke | 700 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| 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 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAID63X700S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 kgf | |
The SAID63X700S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×700 | 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).
Synchronizes two conveyor lanes simultaneously using both rod ends, ensuring perfectly timed part transfers without adding a second actuator.
Delivers high-precision clamping on machining fixtures where the twin rods prevent rotational drift during heavy milling operations.
To replace the discontinued SID63X700S, specify the SAID63X700S, which is a direct swap retaining the 700 mm stroke, G3/8 port, and ISO 15552 mounting dimensions (Basic, FA, LB, TC). Size both ways by verifying the equal force of 1402 N @0.5 MPa fits your load; if more force is needed, step up to the 80 mm bore (2268 N @0.5 MPa), or drop to the 50 mm bore (825 N @0.5 MPa) for lighter duties. A double-rod design is right when you need anti-rotation stability or want to drive two tools from one piston. The -S magnet enables position sensing. Because the 700 mm stroke is long, ensure external guides carry side loads to prevent rod bending.
Replacement checklist
Yes, the SID63X700S is discontinued. The direct replacement is the SAID63X700S. It shares the same 63 mm bore, 700 mm stroke, G3/8 port, and ISO 15552 mounting interface, while adding an upgraded two Y-shaped one-way piston seal for longer life.
Because it is a double-rod cylinder, force is equal both ways: 1402 N @0.5 MPa, 1962 N @0.7 MPa, and 2523 N @0.9 MPa. Operating speed is 30-800 mm/s.
Send us the quantity and destination. We confirm price, stock and lead time on the SAID63X700S replacement — usually within 7-8 hours.