This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID125X450S, 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 SID125X450S
The AirTAC SID Series Double-Rod Cylinder SID125X450S 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 SAID125X450S, 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 → SAID125X450S
- 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 SID125X450S
The AirTAC SID125X450S is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends on one piston, ensuring push and pull force are equal at 5734 N @0.5 MPa, 8028 N @0.7 MPa, and 10321 N @0.9 MPa. This model is discontinued; the direct replacement is the SAID125X450S. It shares the same G1/2 port, M27x2 rod thread, 40 mm adjustable cushion, and ISO 15552 mounting interface. The SAI upgrade uses an improved two Y-shaped one-way piston seal for lower start-up pressure and longer life.
Because both faces use the rod-side area, the second rod provides anti-rotation support and can carry a sensor cam or drive two tools simultaneously. With a 450 mm stroke, external guides are recommended to prevent rod bending under side loads. The -S suffix denotes a built-in piston magnet for legacy CS1-B/DS1-B switches. A plain cylinder does not hold loads on air loss; use an external rod lock or SAIL/BSAI variant for held loads.
Airtac SID Series Double-Rod Cylinder SID125X450S Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID125X450S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID125X450S |
| 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 SAID125X450S 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 SAID125X450S 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 SID125X450S
| 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 SID125X450S Is Used
Multi-Tool Drive Station
Drives two separate operations from one piston, using the second rod to carry an opposing tool while maintaining equal force both ways.
Anti-Rotation Transfer
Transfers heavy workpieces along a conveyor without rotational drift, leveraging the double-rod geometry for stable guidance.
Symmetric Positioning Stop
Acts as a synchronized stopper where the rear rod mounts a sensor cam, ensuring precise bidirectional positioning feedback.
Replacing the Airtac SID Series Double-Rod Cylinder SID125X450S with the SAID125X450S
To replace the discontinued SID125X450S, install the direct replacement SAID125X450S, which matches the 125 mm bore, 450 mm stroke, G1/2 port, and ISO 15552 mounting dimensions (Basic, FA, LB, TC, FTC, TCM1, TCM2). Size both ways by verifying the equal push/pull force fits your application, checking neighbouring bores if a different force profile is needed. A double rod is right when you need equal both ways force, anti-rotation stability, or a back rod to mount a sensor cam. The -S magnet supports legacy CS1-B/DS1-B sensors. For this 450 mm stroke, add external guides to manage side-load and rod-bending risks.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID125X450S
- ✓ 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 SID125X450S FAQ
Yes, the SID125X450S is discontinued. The direct replacement is the SAID125X450S, which shares the same ISO 15552 interface, 125 mm bore, 450 mm stroke, G1/2 port, and mounting options. The SAI family also adds SAIL and BSAI lock variants.
Force is equal both ways: 5734 N @0.5 MPa, 8028 N @0.7 MPa, and 10321 N @0.9 MPa. Speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAID125X450S
Send us the quantity and destination. We confirm price, stock and lead time on the SAID125X450S replacement — usually within 7-8 hours.