This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID40X80S, 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 SID40X80S
The AirTAC Airtac SID Series Double-Rod Cylinder SID40X80S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø40mm bore and 80mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID40X80S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke80 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAID40X80S
- 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 SID40X80S
The AirTAC SID40X80S is a double-acting double-rod ISO 15552 cylinder where a rod exits both ends, yielding equal force both ways at 528N @0.5MPa, 739N @0.7MPa, and 950N @0.9MPa. The bore is 40mm, rod is 16mm, and the air port is G1/4. This SID model is discontinued; the direct replacement is the SAID40X80S, sharing the same interface, mounting, and stroke. The SAI family uses an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life.
Because the piston has identical rod-side areas on both faces, push and pull forces match perfectly, preventing rod snap-back and allowing a sensor cam on the back rod. A plain cylinder does not hold loads on air loss; the 27mm adjustable cushion only decelerates near stroke end. For held loads, use an external rod lock or SAIL/BSAI variant.
Airtac SID Series Double-Rod Cylinder SID40X80S Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID40X80S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID40X80S |
| Bore size | Ø40 mm |
| Stroke | 80 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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, 27 mm |
| Max standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAID40X80S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
The SAID40X80S 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 SID40X80S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 40 | 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 SID40X80S Is Used
Dual-End Transfer Pusher
Drives a transfer finger on the front rod while the back rod carries a sensor cam, using equal both-ways force to push parts evenly on a conveyor line.
Anti-Rotation Gripper Actuator
The twin-rod geometry prevents mechanical twist during rapid clamping, ensuring the jaws remain perfectly aligned without needing external guides.
Synchronized Tooling Shuttle
Simultaneously shifts two opposing machining fixtures from a single piston, leveraging the equal push and pull force to maintain process timing.
Replacing the Airtac SID Series Double-Rod Cylinder SID40X80S with the SAID40X80S
To replace the discontinued SID40X80S, install the direct replacement SAID40X80S, which reuses the exact ISO 15552 mounting (Basic, FA, LB, TC) and G1/4 port. Size both ways by matching the equal push/pull force: if 950N @0.9MPa is insufficient, step up to the 50mm bore (1154N @0.7MPa); if oversized, step down to the 32mm bore (483N @0.7MPa). A double rod is right when you need anti-rotation stability or must drive two tools simultaneously. The -S suffix means a piston magnet is present for legacy CS1-B/DS1-B switches (SAID uses current switches). For this 80mm stroke side-load is minimal, but for any stroke >=300mm ensure guide alignment to prevent binding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID40X80S
- ✓ 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 SID40X80S FAQ
Yes, the SID40X80S is discontinued. The direct replacement is the SAID40X80S, which matches the ISO 15552 interface, 40mm bore, 80mm stroke, G1/4 port, and mounting hardware without modifications.
As a double-rod cylinder, force is equal both ways: 528N @0.5MPa, 739N @0.7MPa, and 950N @0.9MPa. The air port is G1/4, the rod is 16mm with an M12x1.25 thread, and speed ranges 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAID40X80S
Send us the quantity and destination. We confirm price, stock and lead time on the SAID40X80S replacement — usually within 7-8 hours.