This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID50X800S, 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 SID50X800S
The AirTAC Airtac SID Series Double-Rod Cylinder SID50X800S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 800mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID50X800S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke800 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAID50X800S
- 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 SID50X800S
The AirTAC SID50X800S is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends, making push and pull force equal at 825 N @0.5 MPa. This 50mm bore model has a 20mm rod, M16x1.5 thread, 30mm cushions, a G1/4 port, and a built-in magnet for CS1-B/DS1-B sensors. The SID line is discontinued; the direct replacement is the SAID50X800S, sharing the same interface, force, and mounting.
The SAI upgrade uses a two-piece Y-shaped piston seal for lower start-up pressure and longer life. For this 800mm stroke, external guides are advised to prevent rod bending under side loads. The air cushion only decelerates near stroke end; it is not a lock, so use an external rod lock or SAIL/BSAI variant to hold loads on air loss.
Airtac SID Series Double-Rod Cylinder SID50X800S Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID50X800S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID50X800S |
| Bore size | Ø50 mm |
| Stroke | 800 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 SAID50X800S 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 SAID50X800S 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 SID50X800S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×800 | 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 SID50X800S Is Used
Dual-End Transfer Pusher
Drives a transfer carriage on a conveyor using both rod ends to push and retract equal loads, ensuring stable anti-rotation movement over the 800mm travel.
Symmetrical Machining Fixture
Clamps a workpiece from opposite sides simultaneously; the equal both-ways force of 1154 N @0.7 MPa provides balanced holding without eccentric stress.
Replacing the Airtac SID Series Double-Rod Cylinder SID50X800S with the SAID50X800S
To replace the discontinued SID50X800S, install the direct replacement SAID50X800S, reusing the exact ISO 15552 mounting (Basic, FA, LB, TC) and G1/4 porting. Both cylinders deliver equal both-ways force of 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. If sizing alternatives, the 40mm bore yields 528 N and the 63mm yields 1402 N @0.5 MPa; choose based on your equal push/pull requirements. A double-rod design is right when you need anti-rotation stability or must drive two tools simultaneously. The -S suffix indicates a piston magnet for legacy CS1-B/DS1-B switches. Because the 800mm stroke exceeds 300mm, always use external guides to manage side-load and rod-bending forces.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID50X800S
- ✓ 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 SID50X800S FAQ
Yes, the AirTAC SID50X800S is discontinued. The direct replacement is the SAID50X800S. It shares the same ISO 15552 interface, 50mm bore, 800mm stroke, G1/4 port, and mounting options, while adding an upgraded two-piece Y-shaped piston seal for longer life.
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. The bore has a G1/4 port, a 20mm rod, and 30mm adjustable cushions at each end.
Related AirTAC SAI Cylinders
Request a Quote for the SAID50X800S
Send us the quantity and destination. We confirm price, stock and lead time on the SAID50X800S replacement — usually within 7-8 hours.