This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID125X25, 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 SID125X25
The AirTAC Airtac SID Series Double-Rod Cylinder SID125X25 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 25mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID125X25, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke25 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAID125X25
- 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 SID125X25
The AirTAC SID125X25 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. Because both faces use the rod-side annular area, you never get a larger single-rod push value. This bore features a Ø32 mm piston rod, an M27x2 rod-end thread, a G1/2 air port, and 40 mm adjustable air cushions at each end. This SKU has no -S magnet and cannot take a magnetic switch.
This SID model is discontinued and end-of-life. The direct replacement is the SAID125X25, sharing the same ISO 15552 mounting interface, bore, stroke, and G1/2 port. The SAI replacement uses an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life.
Airtac SID Series Double-Rod Cylinder SID125X25 Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID125X25 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID125X25 |
| Bore size | Ø125 mm |
| Stroke | 25 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 SAID125X25 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 SAID125X25 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 SID125X25
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×25 | 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 SID125X25 Is Used
Equal-Force Stamping
Drives a stamping die where the return stroke must generate the same 8028 N @0.7 MPa force as the advance, ensuring consistent part ejection without a larger bore.
Dual-End Transfer
Uses the second protruding rod to push a parallel conveyor lane simultaneously, keeping two packaging lines perfectly synchronised from one piston.
Anti-Rotation Press
Prevents jaw twist during a vertical pressing operation, maintaining precise alignment because the dual rods resist side torque better than a single rod.
Replacing the Airtac SID Series Double-Rod Cylinder SID125X25 with the SAID125X25
To replace the discontinued SID125X25, specify the SAID125X25 direct, which preserves the ISO 15552 mounting interface, G1/2 port, and equal-both-ways force. Size both directions by checking neighbouring bores if you need less or more force, remembering this double-rod design outputs identical push and pull. Choose a double-rod cylinder when you need anti-rotation stability or when the back rod must carry a sensor cam or drive a second tool. Reuse existing FA, LB, or TC mounts. Since this SKU lacks a -S magnet, it cannot support legacy CS1-B/DS1-B sensors; for sensing, select an -S model. For any stroke length of 300 mm or greater, verify your side-load limits. 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.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID125X25
- ✓ 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 SID125X25 FAQ
Yes, the AirTAC SID125X25 is discontinued. The direct replacement is the SAID125X25, which shares the same ISO 15552 mounting interface, 125 mm bore, 25 mm stroke, G1/2 port, and equal-both-ways force.
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. Operating pressure is 0.15-1.0 MPa, and speed is 30-500 mm/s. It uses a G1/2 port and 40 mm adjustable cushions.
Related AirTAC SAI Cylinders
Request a Quote for the SAID125X25
Send us the quantity and destination. We confirm price, stock and lead time on the SAID125X25 replacement — usually within 7-8 hours.