This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID80X250, 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 SID80X250
The AirTAC Airtac SID Series Double-Rod Cylinder SID80X250 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 250mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID80X250, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke250 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAID80X250
- 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 SID80X250
The AirTAC SID80X250 is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends on one piston. Both faces use the rod-side area, making push and pull force equal at 2268 N @0.5 MPa, 3175 N @0.7 MPa, and 4082 N @0.9 MPa. This model is discontinued; the direct replacement is the SAID80X250, sharing the same 80mm bore, 250mm stroke, G3/8 port, and ISO 15552 mounting interface. The SAI upgrade uses a two Y-shaped one-way piston seal for low start-up pressure and long life.
A double-rod design prevents piston rotation and lets the back rod drive a second tool or sensor cam. With no -S suffix, this SKU lacks a magnet and cannot take a switch. It uses a 25mm rod, M20x1.5 thread, and 36mm adjustable cushions. Note: a plain cylinder drifts on air loss; the cushion only decelerates. For held loads, use an external rod lock or SAIL/BSAI variant.
Airtac SID Series Double-Rod Cylinder SID80X250 Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID80X250 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID80X250 |
| Bore size | Ø80 mm |
| Stroke | 250 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 SAID80X250 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 SAID80X250 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 SID80X250
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×250 | 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 SID80X250 Is Used
Synchronous Tool Driving
Operates two opposing work heads from one piston, utilizing the equal both-ways force to machine or form parts simultaneously from both ends.
Anti-Rotation Transfer
Moves pallets along a conveyor without rotational drift, using the dual-rod geometry to maintain precise alignment during dynamic 30-800 mm/s transfers.
Replacing the Airtac SID Series Double-Rod Cylinder SID80X250 with the SAID80X250
To replace the discontinued SID80X250, install the direct replacement SAID80X250, reusing the exact ISO 15552 mounting (Basic, FA, LB, TC, FTC, TCM1, TCM2) without bracket changes. Size both ways by checking the equal push/pull force: if 2268 N @0.5 MPa is insufficient, step up to the 100mm bore, or drop to 63mm (1402 N) for lighter loads. Choose a double-rod cylinder when you need anti-rotation stability or must drive two mechanisms synchronously. Select the -S magnet suffix if you require position sensing. For this 250mm stroke, ensure your guiding system handles side loads, and never rely on the air cushion to hold a load on air loss—use a pilot-operated check valve or external lock.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID80X250
- ✓ 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 SID80X250 FAQ
Yes, the SID80X250 is discontinued. The direct replacement is the SAID80X250. It shares the same 80mm bore, 250mm stroke, G3/8 port, and ISO 15552 mounting interface, while adding an upgraded two Y-shaped one-way piston seal for lower start-up pressure and longer life.
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. The bore dictates a fixed G3/8 air port, a 25mm rod with an M20x1.5 thread, and 36mm adjustable cushions.
Related AirTAC SAI Cylinders
Request a Quote for the SAID80X250
Send us the quantity and destination. We confirm price, stock and lead time on the SAID80X250 replacement — usually within 7-8 hours.