This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID50X500, 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 SID Series Double-Rod Cylinder SID50X500
The AirTAC Airtac SID Series Double-Rod Cylinder SID50X500 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 500mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID50X500, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke500 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAID50X500
- 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 SID Series Double-Rod Cylinder SID50X500
The AirTAC SID50X500 is a double-acting, double-rod ISO 15552 cylinder that is officially discontinued. The direct replacement is the SAID50X500, matching the 50mm bore, 500mm stroke, G1/4 port, and mounting interface. Because a rod exits both ends, the push and pull forces are equal at 825N @0.5MPa. The SAI upgrade features a two-piece Y-shaped piston seal for lower start-up pressure and longer life.
With a 500mm stroke and 20mm rod, this unit delivers 1154N @0.7MPa both ways. This non-magnetic SKU cannot take a sensor switch. Note that air cushions only decelerate; for load holding on air loss, use an external rod lock or SAIL/BSAI variant.
Airtac SID Series Double-Rod Cylinder SID50X500 Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID50X500 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID50X500 |
| Bore size | Ø50 mm |
| Stroke | 500 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 SAID50X500 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 SAID50X500 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SID Series Double-Rod Cylinder SID50X500
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×500 | 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 SID Series Double-Rod Cylinder SID50X500 Is Used
Synchronized Dual-Tool Drive
Drives two opposing mechanisms simultaneously from one piston, ensuring perfectly matched timing without external mechanical linkages.
Anti-Rotation Workpiece Clamp
The dual-rod geometry prevents piston rotation during clamping, maintaining precise angular alignment for high-accuracy machining tasks.
Balanced Vertical Lift
Equal push and pull forces simplify vertical lift balancing, providing a consistent 825N @0.5MPa thrust in both up and down directions.
Replacing the Airtac SID Series Double-Rod Cylinder SID50X500 with the SAID50X500
To replace the SID50X500, install the SAID50X500 directly—it preserves the ISO 15552 mounting and G1/4 port. Size both ways by checking equal force: the 40mm bore yields 528N @0.5MPa, while the 63mm bore yields 1402N @0.5MPa. Choose a double-rod when you need anti-rotation or must drive two tools. Reuse FA, LB, or TC mounts. As this lacks the -S magnet, it cannot use sensors. For the 500mm stroke, use external guides to prevent rod bending and side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID50X500
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SID Series Double-Rod Cylinder SID50X500 FAQ
Yes, the SID50X500 is discontinued. The direct replacement is the SAID50X500, offering the same ISO 15552 interface, 500mm stroke, and G1/4 port.
Force is equal both ways: 825N @0.5MPa, 1154N @0.7MPa, and 1484N @0.9MPa. The air port is G1/4, the rod is 20mm with an M16x1.5 thread, and speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAID50X500
Send us the quantity and destination. We confirm price, stock and lead time on the SAID50X500 replacement — usually within 7-8 hours.