This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID125X330, 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 SID125X330
The AirTAC Airtac SID Series Double-Rod Cylinder SID125X330 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 330mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID125X330, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke330 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAID125X330
- 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 SID125X330
The AirTAC SID125X330 is a discontinued double-rod ISO 15552 cylinder where a rod exits both ends on one piston, making push and pull force equal both ways at 5734 N @0.5 MPa, 8028 N @0.7 MPa, and 10321 N @0.9 MPa. It features a 125mm bore, 330mm stroke, G1/2 air port, M27x2 rod thread, and 40mm adjustable air cushions. The direct replacement is the SAID125X330, sharing the same interface, bore, stroke, force, port, and mounting.
Because the second rod occupies the rear chamber, both faces use the rod-side area, yielding equal both ways force ideal for anti-rotation or driving two tools simultaneously. The SAI upgrade adds a two Y-shaped one-way piston seal for low start-up pressure and long life. This non-magnetic SKU cannot take a sensor switch.
Airtac SID Series Double-Rod Cylinder SID125X330 Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID125X330 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID125X330 |
| Bore size | Ø125 mm |
| Stroke | 330 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 SAID125X330 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 SAID125X330 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 SID125X330
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×330 | 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 SID125X330 Is Used
Twin-Tool Machining Station
Drives two opposing machining heads simultaneously with equal both ways force, ensuring perfectly balanced material removal on both faces.
Anti-Rotation Transfer Unit
Uses the dual-rod geometry to resist rotational torque during heavy workpiece transfer across a 330mm stroke without external guides.
Symmetric Clamping Fixture
Applies equal clamping pressure from both directions to secure irregular components, leveraging the 5734 N @0.5 MPa equal force both ways.
Replacing the Airtac SID Series Double-Rod Cylinder SID125X330 with the SAID125X330
To replace the discontinued SID125X330, install the direct replacement SAID125X330 which matches the ISO 15552 mounting interface, G1/2 port, and 40mm cushion. When sizing both ways, verify equal force requirements against neighbouring bores: the 100mm bore yields 3681 N @0.7 MPa, while the 160mm bore yields 13194 N @0.7 MPa. Choose a double-rod cylinder when you need anti-rotation stability, to mount a sensor cam on the back rod, or to drive two tools. Mounting options include Basic, FA, LB, and TC. For the 330mm stroke, add external guides to prevent rod-bending under side-load. This SKU lacks the -S magnet and cannot take sensors. A plain cylinder does not hold loads on air loss; use an external rod lock or SAIL/BSAI variant for held loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID125X330
- ✓ 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 SID125X330 FAQ
Yes, the SID125X330 is discontinued. The direct replacement is the SAID125X330, which shares the same ISO 15552 interface, 125mm bore, 330mm stroke, G1/2 port, and mounting hardware. The SAI family also adds upgraded two Y-shaped one-way piston seals for longer life.
Force is equal both ways at 5734 N @0.5 MPa, 8028 N @0.7 MPa, and 10321 N @0.9 MPa. It uses a G1/2 port, has a 40mm adjustable air cushion, and operates at 30-500 mm/s. The air cushion only decelerates near stroke end and does not hold loads on air loss.
Related AirTAC SAI Cylinders
Request a Quote for the SAID125X330
Send us the quantity and destination. We confirm price, stock and lead time on the SAID125X330 replacement — usually within 7-8 hours.