This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID125X30S, 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 SID125X30S
The AirTAC Airtac SID Series Double-Rod Cylinder SID125X30S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 30mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID125X30S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke30 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAID125X30S
- 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 SID125X30S
The AirTAC SID125X30S is a discontinued 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. The direct replacement is the SAID125X30S, sharing the same 125mm bore, 30mm stroke, G1/2 port, and mounting interface. The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life.
This 125mm bore unit features a Ø32mm piston rod, M27x2 rod-end thread, 40mm adjustable air cushions, and a 30-500 mm/s speed range. The -S suffix denotes a built-in piston magnet for legacy CS1-B/DS1-B switches. Equal-both-ways force provides anti-rotation stability and allows the back rod to drive a second tool or carry a sensor cam.
Airtac SID Series Double-Rod Cylinder SID125X30S Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID125X30S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID125X30S |
| Bore size | Ø125 mm |
| Stroke | 30 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 SAID125X30S 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 SAID125X30S 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 SID125X30S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×30 | 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 SID125X30S Is Used
Twin-Tool Machining Station
Uses the equal-both-ways force to drive cutting tools from both ends simultaneously, ensuring balanced material removal without requiring a second actuator.
Anti-Rotation Transfer Gate
The dual-rod construction prevents mechanical twisting during high-speed part diversion on a 125mm bore packaging line.
Cam-Driven Forming Press
The rear rod carries a sensor cam to trigger external valves precisely at mid-stroke while the front rod applies 8028 N @0.7 MPa clamping force.
Replacing the Airtac SID Series Double-Rod Cylinder SID125X30S with the SAID125X30S
Replace the discontinued SID125X30S directly with the SAID125X30S, reusing the existing ISO 15552 mounting hardware (Basic, FA, LB, TC, FTC, TCM1, TCM2) without machining. Size both directions by confirming the 5734 N @0.5 MPa equal force is sufficient, or step to neighbour bores. A double rod is right when you need anti-rotation stability or a back rod for a sensor cam. The -S magnet enables position sensing. For this 30mm stroke side-load is minimal, but for stroke >=300mm verify guide tolerance. A plain cylinder does not hold loads on air loss; the cushion only decelerates near stroke end, so use an external rod lock or SAIL/BSAI variant for held loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID125X30S
- ✓ 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 SID125X30S FAQ
Yes, the SID125X30S is discontinued. The direct replacement is the SAID125X30S, which matches the 125mm bore, 30mm stroke, G1/2 port, and ISO 15552 mounting. The SAI family also adds SAIL and BSAI lock variants.
Because it is a double-rod cylinder, force is equal both ways: 5734 N @0.5 MPa, 8028 N @0.7 MPa, and 10321 N @0.9 MPa. The air port is G1/2, the rod is Ø32mm with an M27x2 thread, and speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAID125X30S
Send us the quantity and destination. We confirm price, stock and lead time on the SAID125X30S replacement — usually within 7-8 hours.