This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID50X180, 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 SID50X180
The AirTAC Airtac SID Series Double-Rod Cylinder SID50X180 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 180mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID50X180, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke180 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAID50X180
- 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 SID50X180
The AirTAC SID50X180 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, so push and pull force are equal at 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. This model is discontinued; the direct replacement is the SAID50X180, matching the 50mm bore, 180mm stroke, G1/4 port, and ISO 15552 mounting interface. The SAI upgrade uses an upgraded two Y-shaped one-way piston seal for low start-up pressure and long life.
Because the second rod prevents piston drift and rotation, it is ideal for driving two tools or carrying a sensor cam. With no -S suffix, this SKU cannot take a magnetic switch. A plain cylinder does not hold loads on air loss; the 30mm 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 SID50X180 Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID50X180 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID50X180 |
| Bore size | Ø50 mm |
| Stroke | 180 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 SAID50X180 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 SAID50X180 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 SID50X180
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×180 | 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 SID50X180 Is Used
Dual-Tool Transfer
Simultaneously drives two opposing grippers to pick and place parts from both sides without adding a second cylinder.
Anti-Rotation Indexing
The twin-rod geometry prevents piston rotation, holding strict angular alignment for precision machining feeds.
Symmetric Clamping
Applies equal clamping force from both ends to center a workpiece, leveraging the identical push and pull thrust.
Replacing the Airtac SID Series Double-Rod Cylinder SID50X180 with the SAID50X180
Replace the discontinued SID50X180 directly with the SAID50X180, reusing the exact FA, LB, or TC ISO 15552 mounts. Size both ways by checking equal force across neighbor bores: the 40mm offers 528/739/950 N, while the 63mm provides 1402/1962/2523 N. Choose a double-rod when anti-rotation or driving two tools is required. This non-magnetic SKU cannot take a sensor. For this 180mm stroke, side-load is minimal, but for strokes >=300mm ensure guide alignment to prevent rod binding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID50X180
- ✓ 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 SID50X180 FAQ
Yes, the SID50X180 is discontinued. The direct replacement is the SAID50X180, which matches the 50mm bore, 180mm stroke, G1/4 port, and ISO 15552 mounting interface.
Force is equal both ways: 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. Speed is 30-800 mm/s. It uses a G1/4 port, M16x1.5 rod thread, and 30mm adjustable cushions.
Related AirTAC SAI Cylinders
Request a Quote for the SAID50X180
Send us the quantity and destination. We confirm price, stock and lead time on the SAID50X180 replacement — usually within 7-8 hours.