This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID125X500S, 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 SID125X500S
The AirTAC Airtac SID Series Double-Rod Cylinder SID125X500S 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 SAID125X500S, 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 → SAID125X500S
- 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 SID125X500S
The AirTAC SID125X500S is a double-acting, double-rod ISO 15552 cylinder featuring a 125mm bore and 500mm stroke. Because a rod exits both ends on one piston, both faces use the rod-side area, making push and pull force equal at 5734N @0.5MPa, 8028N @0.7MPa, and 10321N @0.9MPa. This SID model is discontinued; the direct replacement is the SAID125X500S. It shares the same G1/2 port, M27x2 rod thread, and 40mm adjustable cushion. The SAI upgrade uses an upgraded two Y-shaped one-way piston seal for low start-up pressure and long life.
The double-rod design prevents piston rotation and allows the back rod to carry a sensor cam or drive a second tool simultaneously. For the -S magnet configuration, the built-in piston magnet works with legacy CS1-B/DS1-B switches (the SAI replacement uses current AirTAC switches). Note that a plain cylinder does not hold loads on air loss; the cushion only decelerates near stroke end. For held loads, use an external rod lock, pilot-operated check valve, or the SAIL/BSAI lock variant.
Airtac SID Series Double-Rod Cylinder SID125X500S Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID125X500S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID125X500S |
| 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 SAID125X500S 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 SAID125X500S 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 SID125X500S
| 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 SID125X500S Is Used
Dual-Tool Machining Station
Drives two opposing machining heads simultaneously with equal force in both directions, ensuring perfectly balanced cutting cycles without requiring two separate actuators.
Anti-Rotation Transfer Unit
Transfers heavy workpieces along a conveyor using the second rod end to carry a sensor cam, preventing piston twist and maintaining precise alignment during 500mm strokes.
Vertical Lift Fixture
Lifts vertically with equal push and pull force.
Replacing the Airtac SID Series Double-Rod Cylinder SID125X500S with the SAID125X500S
To replace the discontinued SID125X500S, install the direct replacement SAID125X500S, which matches the ISO 15552 mounting interface, 500mm stroke, G1/2 port, and equal-both-ways force. Size both directions by verifying the equal force fits your load; if you need less force, step down to the 100mm bore (3681N @0.5MPa), or step up to the 160mm bore (9425N @0.5MPa) for more. A double rod is right when you need anti-rotation, a back-side sensor cam, or dual-tool driving. You can reuse FA, LB, or TC mounts. The -S suffix means the magnet is present for switches. Because the stroke is 500mm (>=300mm), add external guides to prevent rod bending and side-load damage. Operating speed is 30-500mm/s.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID125X500S
- ✓ 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 SID125X500S FAQ
Yes, the AirTAC SID125X500S is discontinued. The direct replacement is the SAID125X500S. It shares the same ISO 15552 interface, 125mm bore, 500mm stroke, G1/2 port, and mounting, but adds an upgraded two Y-shaped one-way piston seal for longer life and lower start-up pressure.
Because it is a double-rod cylinder, force is equal both ways: 5734N @0.5MPa, 8028N @0.7MPa, and 10321N @0.9MPa. It features a 32mm rod, M27x2 thread, 40mm adjustable cushion at each end, and operates at 30-500mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAID125X500S
Send us the quantity and destination. We confirm price, stock and lead time on the SAID125X500S replacement — usually within 7-8 hours.