This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID50X450, 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 SID50X450
The AirTAC Airtac SID Series Double-Rod Cylinder SID50X450 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 450mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID50X450, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke450 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAID50X450
- 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 SID50X450
The AirTAC SID50X450 is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends on one piston, making the push and pull force equal at 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. This SKU has no -S magnet and cannot take a sensor. It uses a G1/4 port, an M16x1.5 rod thread, and a 30 mm adjustable air cushion. This SID model is discontinued; the direct replacement is the SAID50X450, sharing the same ISO 15552 mounting interface, bore, stroke, and port.
The SAI replacement upgrades the piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life. A double-rod design prevents rod-side rotation and lets the back rod drive a second tool. A plain cylinder does not hold loads on air loss; use an external rod lock or the SAIL/BSAI lock variant for held loads.
Airtac SID Series Double-Rod Cylinder SID50X450 Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID50X450 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID50X450 |
| Bore size | Ø50 mm |
| Stroke | 450 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 SAID50X450 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 SAID50X450 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 SID50X450
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×450 | 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 SID50X450 Is Used
Dual-End Transfer Pusher
Uses the equal both-ways force to push parts from one conveyor lane to another on both the extend and retract strokes, doubling cycle throughput.
Anti-Rotation Machining Clamp
The twin-rod geometry prevents piston twist during high-speed clamping, maintaining precise alignment for machining operations without external guides.
Symmetrical Lift Fixture
Drives two opposing grippers simultaneously from both rod ends, ensuring perfectly balanced vertical lifting of heavy sheet metal panels.
Replacing the Airtac SID Series Double-Rod Cylinder SID50X450 with the SAID50X450
Replace the discontinued SID50X450 directly with the SAID50X450, reusing your existing FA, LB, or TC ISO 15552 mounts without modification. Because force is equal both ways, size both directions identically; if you need more force, step up to the 63 mm bore, or drop to the 40 mm bore for lighter loads. Choose a double-rod cylinder when you need anti-rotation stability or must drive two tools from one piston. This non-magnetic SKU cannot support sensors. With the 450 mm stroke, add external guides to prevent rod bending under side loads. The 30 mm adjustable cushion only decelerates near stroke end and will not hold a load without live air.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID50X450
- ✓ 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 SID50X450 FAQ
Yes, the SID50X450 is discontinued. The direct replacement is the SAID50X450, which matches the 50 mm bore, 450 mm 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. The air port is G1/4, the rod thread is M16x1.5, and it has a 30 mm adjustable cushion. Speed range is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAID50X450
Send us the quantity and destination. We confirm price, stock and lead time on the SAID50X450 replacement — usually within 7-8 hours.