This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X260, 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 SI125 Standard Cylinder SI125X260
The AirTAC SI125 Standard Cylinder SI125X260 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 260mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X260, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke260 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X260
- 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 SI125 Standard Cylinder SI125X260
The AirTAC SI125X260 is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 260 mm stroke. It delivers 6136 N push force at 0.5 MPa via a G1/2 port. Because this legacy unit lacks a magnet, it cannot accept position sensors.
Order the direct replacement SAI125X260 instead. It shares the exact ISO 15552 mounting interface, M27x2 rod thread, and 40 mm cushions. The SAI features an upgraded piston seal with two Y-shaped elements for low start-up pressure, and introduces SAIL and BSAI lock variants the SI lacked.
Airtac SI125 Standard Cylinder SI125X260 Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X260 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X260 |
| Bore size | Ø125 mm |
| Stroke | 260 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 SAI125X260 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 SAI125X260 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI125 Standard Cylinder SI125X260
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×260 | 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 SI125 Standard Cylinder SI125X260 Is Used
Heavy Pressing
Drives large stamping or forming presses requiring up to 6136 N of thrust at 0.5 MPa.
Pallet Handling
Indexes heavy loaded pallets along conveyors where a robust 125 mm bore is necessary.
Material Lifts
Lowers heavy fixtures or platens, safely decelerating loads using the 40 mm adjustable cushions.
Replacing the Airtac SI125 Standard Cylinder SI125X260 with the SAI125X260
To replace the SI125X260, order the SAI125X260. Confirm the ISO 15552 mounting accessory (LB, FA, CA, TC, etc.), the G1/2 port thread (PT, G, or NPT), and the M27x2 rod end. This non-magnet SKU cannot fit sensors; order an SAI with the S suffix if you need CS1-B or DS1-B switches. Sizing both ways: a 100 mm bore gives 3927 N push at 0.5 MPa, while a 160 mm bore yields 10053 N. For load holding on air loss, note that cushions only decelerate; add an external pilot check valve or use the SAIL/BSAI lock variants. With a 260 mm stroke, side-load is moderate, but always guide the rod to prevent bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X260
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI125 Standard Cylinder SI125X260 FAQ
Yes, the SI125X260 is discontinued. The direct replacement is the SAI125X260. It is dimensionally interchangeable per ISO 15552, retaining the same 125 mm bore, 260 mm stroke, 6136 N force, G1/2 port, and mounting interface.
The G1/2 port feeds a 125 mm bore that yields 6136 N push and 5734 N pull at 0.5 MPa. At 0.7 MPa push is 8590 N, and 11045 N at 0.9 MPa. The theoretical max force is 1251 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X260
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X260 replacement — usually within 7-8 hours.