This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID125X450, 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 SID125X450
The AirTAC Airtac SID Series Double-Rod Cylinder SID125X450 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 450mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID125X450, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke450 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAID125X450
- 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 SID125X450
The AirTAC SID125X450 is a discontinued double-acting double-rod ISO 15552 cylinder with a 125mm bore and 450mm stroke. A rod exits both ends on one piston, meaning both faces use the rod-side area, making push and pull force equal at 5734N @0.5MPa, 8028N @0.7MPa, and 10321N @0.9MPa. The direct replacement is the SAID125X450, sharing the same G1/2 port, M27x2 rod thread, and ISO 15552 mounting interface. The SAI upgrade uses a two Y-shaped one-way piston seal for lower start-up pressure and longer life.
This SKU lacks the -S magnet and cannot take a magnetic switch. A plain cylinder does not hold loads on air loss; the 40mm adjustable cushion only decelerates near stroke end. For held loads use an external rod lock, pilot-operated check valve, or SAIL/BSAI lock variant.
Airtac SID Series Double-Rod Cylinder SID125X450 Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID125X450 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID125X450 |
| Bore size | Ø125 mm |
| Stroke | 450 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2.0 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 40 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAID125X450 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
The SAID125X450 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 SID125X450
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | 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 SID125X450 Is Used
Synchronized Tool Driving
Drives two separate workstations simultaneously from one piston, utilizing the equal push and pull force on both rod ends for balanced automated machining.
Anti-Rotation Transfer
Moves pallets along a conveyor using the dual-rod architecture to resist mechanical torsion and prevent platform rotation during heavy horizontal indexing.
External Cam Actuation
Uses the rear rod extension to mechanically trigger external limit valves or mechanisms, operating reliably without requiring onboard magnetic sensors.
Replacing the Airtac SID Series Double-Rod Cylinder SID125X450 with the SAID125X450
To replace the discontinued SID125X450, specify the SAID125X450 direct, which preserves the G1/2 port and ISO 15552 mounting interface. Size both ways by matching the equal 8028N @0.7MPa force; if less force is acceptable, step down to the 100mm bore (5153N @0.7MPa), or step up to 160mm (13194N @0.7MPa) for higher demands. Choose a double-rod cylinder when you need anti-rotation stability or must drive two tools simultaneously. Mounting options include Basic, FA, LB, and TC. Because the 450mm stroke is long, use external guides to prevent rod bending and side-load wear. Note this non-magnetic SKU cannot support sensors.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID125X450
- ✓ 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 SID125X450 FAQ
Yes, the SID125X450 is discontinued. The direct replacement is the SAID125X450. It shares the same 125mm bore, 450mm stroke, G1/2 port, and ISO 15552 mounting interface, while adding an upgraded two Y-shaped one-way piston seal for longer life.
Force is equal both ways at 5734N @0.5MPa, 8028N @0.7MPa, and 10321N @0.9MPa. Operating pressure is 0.15-1.0MPa. Speed is 30-500mm/s. The cylinder has a 32mm rod, M27x2 thread, and 40mm adjustable cushions. It cannot hold loads without live air.
Related AirTAC SAI Cylinders
Request a Quote for the SAID125X450
Send us the quantity and destination. We confirm price, stock and lead time on the SAID125X450 replacement — usually within 7-8 hours.