This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID50X80S, 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 SID50X80S
The AirTAC Airtac SID Series Double-Rod Cylinder SID50X80S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 80mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID50X80S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke80 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAID50X80S
- 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 SID50X80S
The AirTAC SID50X80S 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 at 825 N @0.5 MPa. The direct replacement is the SAID50X80S, reusing the same G1/4 port, M16x1.5 rod thread, and 30 mm adjustable cushions. The SAI family upgrades the piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life.
The -S suffix denotes a built-in piston magnet for legacy CS1-B/DS1-B sensors. A plain cylinder does not hold loads on air loss; the cushion only decelerates, so use an external rod lock or SAIL/BSAI variant for held loads.
Airtac SID Series Double-Rod Cylinder SID50X80S Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID50X80S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID50X80S |
| Bore size | Ø50 mm |
| Stroke | 80 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 SAID50X80S 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 SAID50X80S 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 SID50X80S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×80 | 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 SID50X80S Is Used
Synchronized Tool Driving
Drives two opposing tools simultaneously from one piston, utilizing the equal both-ways force to machine or form parts from both ends accurately.
External Cam Positioning
Uses the rear extending rod to carry an external sensor cam, providing precise mid-stroke position feedback without interfering with the primary work tool.
Anti-Rotation Work Handling
Transfers delicate workpieces along a linear path where the dual-rod architecture prevents rotational drift that a single-rod cylinder might allow.
Replacing the Airtac SID Series Double-Rod Cylinder SID50X80S with the SAID50X80S
Replace the discontinued SID50X80S directly with the SAID50X80S, matching the 80 mm stroke, ISO 15552 mounting, and 825 N @0.5 MPa equal-both-ways force. Choose a double-rod configuration when you need anti-rotation stability or when the back rod must carry a sensor cam. Reuse existing FA, LB, or TC mounts without alteration. The -S magnet supports legacy CS1-B/DS1-B switches, while the SAI replacement uses current AirTAC switches. If scaling up, verify the equal force against neighbouring bores. For strokes of 300 mm or longer, account for side-load deflection on the extended rod.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID50X80S
- ✓ 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 SID50X80S FAQ
Yes, the SID50X80S is discontinued. The direct replacement is the SAID50X80S, offering the same ISO 15552 interface, 50 mm bore, 80 mm stroke, and G1/4 port.
Force is equal both ways at 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. Operating speed is 30-800 mm/s, with a 30 mm adjustable air cushion at each end.
Related AirTAC SAI Cylinders
Request a Quote for the SAID50X80S
Send us the quantity and destination. We confirm price, stock and lead time on the SAID50X80S replacement — usually within 7-8 hours.