This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID125X500, 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 SID125X500
The AirTAC Airtac SID Series Double-Rod Cylinder SID125X500 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 500mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID125X500, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke500 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAID125X500
- 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 SID125X500
The AirTAC SID125X500 is a double-acting, double-rod ISO 15552 cylinder with a 125mm bore and 500mm stroke. Because a rod exits both ends, the effective piston area is identical in each direction, yielding equal push and pull force of 5734N at 0.5MPa, 8028N at 0.7MPa, and 10321N at 0.9MPa. This specific SKU is discontinued and has no magnetic piston (-S omitted), meaning it cannot accept legacy CS1-B/DS1-B switches. The bore dictates a G1/2 port, a 32mm rod with an M27x2 thread, and 40mm adjustable cushions at each end. The direct replacement is the SAID125X500, which reuses the exact ISO 15552 mounting interface, port size, and stroke.
Replacing the SID with the SAID125X500 retains the identical equal-both-ways force and ISO 15552 footprint, but upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. The double-rod layout prevents rod rotation and allows the rear rod to drive a second tool or carry a sensor cam. Note that air cushions only decelerate the piston near stroke end; they do not hold loads on air loss, so an external rod lock or pilot-operated check valve is required for held loads.
Airtac SID Series Double-Rod Cylinder SID125X500 Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID125X500 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID125X500 |
| Bore size | Ø125 mm |
| Stroke | 500 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 SAID125X500 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 SAID125X500 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 SID125X500
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×500 | 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 SID125X500 Is Used
Twin-Tool Machining Station
Drives two opposing machining heads simultaneously using both rod ends, ensuring perfectly synchronized cutting cycles with equal push and pull force.
Anti-Rotation Transfer Gate
Actuates a heavy transfer gate on a 125mm bore cylinder where the dual-rod construction prevents mechanical twisting and maintains precise alignment.
Equal-Force Pallet Lift
Lifts and lowers palletizing fixtures where the 500mm stroke and identical push/pull forces provide stable vertical motion without drift under dynamic loads.
Replacing the Airtac SID Series Double-Rod Cylinder SID125X500 with the SAID125X500
To replace the discontinued SID125X500, install the direct replacement SAID125X500, which matches the 125mm bore, 500mm stroke, G1/2 port, and ISO 15552 mounting dimensions (Basic, FA, LB, TC, FTC, TCM1, TCM2) without machining changes. When sizing, verify the equal both-ways force is sufficient: if 5734N at 0.5MPa is inadequate, step up to the 160mm bore, or step down to the 100mm bore if overspecified. A double-rod cylinder is the right choice when you need anti-rotation stability, equal push/pull forces, or a rear rod to drive a second mechanism. Because this SKU lacks the -S magnet, it cannot use position sensors; if sensing is required, select a SAID125X500-S model. Finally, at 500mm stroke, prevent rod bending by using external guide rails to absorb side loads and protect the piston seal.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID125X500
- ✓ 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 SID125X500 FAQ
Yes, the AirTAC SID125X500 is discontinued. The direct replacement is the SAID125X500. It shares the identical ISO 15552 mounting interface, 125mm bore, 500mm stroke, G1/2 port, and equal both-ways force, but features an upgraded two Y-shaped one-way piston seal for longer life.
Because it is a double-rod cylinder, force is equal both ways: 5734N at 0.5MPa, 8028N at 0.7MPa, and 10321N at 0.9MPa. Operating pressure is 0.15-1.0MPa. Speed ranges from 30-500mm/s. The 40mm adjustable cushions only decelerate the piston near stroke end; they do not hold loads on air loss.
Related AirTAC SAI Cylinders
Request a Quote for the SAID125X500
Send us the quantity and destination. We confirm price, stock and lead time on the SAID125X500 replacement — usually within 7-8 hours.