This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID63X600, 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 SID63X600 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 600mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID63X600, which matches its ISO interface, bore, stroke, force and mounting.
The AirTAC SID63X600 is a double-acting, double-rod ISO 15552 cylinder with a 63 mm bore and 600 mm stroke. Because a rod exits both ends on one piston, both faces use the rod-side area, making push and pull force equal at 1402 N @0.5 MPa, 1962 N @0.7 MPa, and 2523 N @0.9 MPa. The bore fixes the air port to G3/8, the piston rod is Ø20 mm with an M16x1.5 thread, and each end has a 30 mm adjustable air cushion. This legacy model is discontinued; the direct replacement is the SAID63X600, which reuses the same ISO 15552 mounting interface, bore, stroke, and port.
The SAID upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure and longer life, while retaining the 30-800 mm/s speed range. This SKU has no magnet (-S omitted), so it cannot accept a magnetic switch; for position feedback you must add an external sensor cam to the rear rod. A plain cylinder does not hold its load on air loss—the piston drifts and the cushion only decelerates near stroke end—so for held loads use an external rod lock or the SAIL/BSAI lock variant. At 600 mm, add external guides to prevent rod bending under side load.
| Model | Airtac SID Series Double-Rod Cylinder SID63X600 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID63X600 |
| Bore size | Ø63 mm |
| Stroke | 600 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 SAID63X600 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 SAID63X600 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. |
| ×600 | 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).
Pushes and pulls parts down a line with identical 1962 N @0.7 MPa force in both directions, using the rear rod as an external guide to resist yaw.
Uses the protruding back rod to trip an external mechanical limit switch, since this non-magnetic SKU cannot accept a cylinder-mounted sensor.
To replace the discontinued SID63X600, order the SAID63X600; it is a direct fit for the same ISO 15552 interface, G3/8 port, and FA/LB/TC mountings. Size both ways by checking the equal-both-ways force: this 63 mm bore gives 1402 N @0.5 MPa, so if you need more thrust, 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 loads. A double-rod cylinder is the right choice when you need anti-rotation stability, equal push/pull forces, or a back rod to carry a sensor cam. Because this SKU lacks the -S magnet, it cannot take a magnetic switch. Finally, at 600 mm stroke, you must support the load with external guides to prevent rod bending and premature seal wear.
Replacement checklist
Yes, the SID63X600 is discontinued. The direct replacement is the SAID63X600, which matches the 63 mm bore, 600 mm stroke, G3/8 port, and ISO 15552 mounting interface. The SAID family also adds 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. The bore dictates a G3/8 air port.
Send us the quantity and destination. We confirm price, stock and lead time on the SAID63X600 replacement — usually within 7-8 hours.