This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X110SN, 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 SI125X110SN
The AirTAC SI125 Standard Cylinder SI125X110SN is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 110mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X110SN, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke110 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X110SN
- 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 SI125X110SN
The AirTAC SI125X110SN is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 110 mm stroke. It delivers 6136 N push force at 0.5 MPa through a G1/2 port. The direct replacement is the SAI125X110SN, matching the bore, stroke, force, port, and ISO 15552 mounting interface.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The SI -N suffix denotes NBR seals (-20 to +70 C), with Viton H available for high heat. The -S magnet works with legacy CS1-B/DS1-B sensors.
Airtac SI125 Standard Cylinder SI125X110SN Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X110SN |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X110SN |
| Bore size | Ø125 mm |
| Stroke | 110 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 SAI125X110SN 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 SAI125X110SN 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 SI125X110SN
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×110 | 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 SI125X110SN Is Used
Heavy Press Clamping
Applies 6136 N of thrust at 0.5 MPa to secure heavy metal castings or large composite molds during machining and pressing operations.
Industrial Door Actuation
Moves large acoustic or thermal machinery access doors, utilizing the 32 mm rod and ISO 15552 profile to handle substantial inertial mass.
Replacing the Airtac SI125 Standard Cylinder SI125X110SN with the SAI125X110SN
To replace the SI125X110SN, order the SAI125X110SN. Verify the ISO 15552 mounting interface, 110 mm stroke, G1/2 port (PT/G/NPT), and accessories. The -S magnet supports CS1-B/DS1-B switches (SAI uses current AirTAC switches). If downsizing, an 80 mm bore yields 2513 N push at 0.5 MPa; if upsizing, a 160 mm bore provides 10053 N. For load holding on air loss, note that a plain cylinder drifts and cushions only decelerate; use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. Stroke is under 300 mm, so rod-bending side-load risks are minimal.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X110SN
- ✓ 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 SI125X110SN FAQ
Yes, the SI125X110SN is discontinued. The direct replacement is the AirTAC SAI125X110SN. It is dimensionally interchangeable per ISO 15552, matching the 125 mm bore, 110 mm stroke, output force, G1/2 port, and mounting interface.
It features a G1/2 air port and 32 mm rod. Force output is 6136 N push and 5734 N pull at 0.5 MPa, 8590 N push at 0.7 MPa, 11045 N push at 0.9 MPa, and a theoretical max of 1251 kgf at 1.0 MPa. Operating speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X110SN
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X110SN replacement — usually within 7-8 hours.