This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID50X500S, 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 SID50X500S
The AirTAC Airtac SID Series Double-Rod Cylinder SID50X500S 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 SAID50X500S, 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 → SAID50X500S
- 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 SID50X500S
The AirTAC SID50X500S is a discontinued double-acting, double-rod ISO 15552 cylinder where a rod exits both ends, ensuring push and pull force is equal both ways (825 N @0.5 MPa). It features a 50 mm bore, a 500 mm stroke, a G1/4 air port, and a built-in piston magnet for legacy CS1-B/DS1-B switches. The direct replacement is the SAID50X500S, which reuses the same mounting interface, bore, and stroke while upgrading to a two Y-shaped one-way piston seal for lower start-up pressure.
Because the rod-side area drives both faces, force is identical in both directions (1154 N @0.7 MPa, 1484 N @0.9 MPa). A second rod can carry a sensor cam or drive two tools simultaneously. Note that air cushions only decelerate near stroke end; a plain cylinder cannot hold a load on air loss, so use an external rod lock or the SAIL/BSAI lock variant for held loads.
Airtac SID Series Double-Rod Cylinder SID50X500S Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID50X500S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID50X500S |
| 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 SAID50X500S 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 SAID50X500S 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 SID50X500S
| 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 SID50X500S Is Used
Dual-Tool Transfer
Drives two synchronized work tools from opposite rod ends to push and pull equal loads on a conveyor line without requiring a second actuator.
Anti-Rotation Lift
Uses the twin rods exiting both ends to resist mechanical twist during vertical material handling, maintaining strict parallelism over the 500 mm travel.
Cam-Driven Sensing
Mounts a legacy CS1-B/DS1-B sensor cam on the rear rod to track position externally, freeing the front rod for primary work tooling.
Replacing the Airtac SID Series Double-Rod Cylinder SID50X500S with the SAID50X500S
To replace the discontinued SID50X500S, specify the SAID50X500S direct; it matches the ISO 15552 interface, G1/4 port, and 500 mm stroke exactly. Size both ways by checking the equal-both-ways force: if 825 N @0.5 MPa is insufficient, step up to the 63 mm bore (1402 N), or drop to the 40 mm bore (528 N) if lower force is acceptable. A double-rod design is right when you need anti-rotation, a back rod for a sensor cam, or to drive two tools. Reuse FA, LB, or TC mounts. The -S suffix provides a magnet for CS1-B/DS1-B switches. For this 500 mm stroke, use external guides to prevent rod bending and side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID50X500S
- ✓ 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 SID50X500S FAQ
Yes, the SID50X500S is discontinued. The direct replacement is the SAID50X500S. It shares the same ISO 15552 mounting interface, 50 mm bore, 500 mm stroke, and G1/4 port, but adds an upgraded two Y-shaped one-way piston seal for longer life and lower start-up pressure.
Because it is a double-rod cylinder, force is equal both ways: 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAID50X500S
Send us the quantity and destination. We confirm price, stock and lead time on the SAID50X500S replacement — usually within 7-8 hours.