This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID80X400S, 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 SID80X400S
The AirTAC Airtac SID Series Double-Rod Cylinder SID80X400S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 400mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID80X400S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke400 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAID80X400S
- 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 SID80X400S
The AirTAC SID80X400S is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends, making push and pull force equal at 2268 N @0.5 MPa, 3175 N @0.7 MPa, and 4082 N @0.9 MPa. The bore is 80 mm, the port is G3/8, and the rod thread is M20x1.5. This SID model is discontinued; the direct replacement is the SAID80X400S, sharing the same interface, stroke, and mounting.
The SAI replacement uses an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Because the second rod can carry a sensor cam or drive two tools, it offers anti-rotation benefits. The -S suffix means a piston magnet is present for legacy CS1-B/DS1-B switches.
Airtac SID Series Double-Rod Cylinder SID80X400S Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID80X400S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID80X400S |
| Bore size | Ø80 mm |
| Stroke | 400 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| 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, 36 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAID80X400S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
The SAID80X400S 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 SID80X400S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×400 | 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 SID80X400S Is Used
Dual-Tool Machining Station
Drives two opposing machining heads simultaneously with equal force both ways, ensuring balanced material removal without requiring separate actuators.
Transfer Pusher with Rear Cam
Uses the primary rod to push parts down a line while the rear rod carries a sensor cam, providing precise end-of-stroke confirmation without external trackers.
Anti-Rotation Lifting Jig
Lifts and lowers heavy pallets in a vertical jig where the twin rods prevent platform twist, maintaining strict alignment during dynamic vertical motion.
Replacing the Airtac SID Series Double-Rod Cylinder SID80X400S with the SAID80X400S
To replace the discontinued SID80X400S, use the SAID80X400S directly; it preserves the 400 mm stroke, 80 mm bore, G3/8 port, and ISO 15552 mounting dimensions (Basic, FA, LB, TC). When sizing both ways, verify the equal both-ways force of 2268 N @0.5 MPa fits your load, or step to neighbouring bores like 63 mm or 100 mm. Choose a double-rod cylinder when you need anti-rotation, a back rod for a sensor cam, or to drive two tools. The -S suffix provides a magnet for switches. For this 400 mm stroke, use external guides to prevent rod bending and manage side loads. A plain cylinder does not hold loads on air loss; use an external rod lock or SAIL/BSAI variant for held loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID80X400S
- ✓ 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 SID80X400S FAQ
Yes, the SID80X400S is discontinued. The direct replacement is the SAID80X400S, which shares the same ISO 15552 interface, 80 mm bore, 400 mm stroke, G3/8 port, and equal both-ways force.
The bore is 80 mm with a G3/8 port and M20x1.5 rod thread. Because it is a double-rod cylinder, force is equal both ways: 2268 N @0.5 MPa, 3175 N @0.7 MPa, and 4082 N @0.9 MPa. Speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAID80X400S
Send us the quantity and destination. We confirm price, stock and lead time on the SAID80X400S replacement — usually within 7-8 hours.