This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X140SH, 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 SI125X140SH
The AirTAC SI125 Standard Cylinder SI125X140SH is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 140mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X140SH, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke140 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X140SH
- 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 SI125X140SH
The AirTAC SI125X140SH is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 140 mm stroke. It delivers 6136 N push force at 0.5 MPa via a G1/2 port. The direct replacement is the SAI125X140SH, matching the exact bore, stroke, force, port and ISO 15552 mounting interface.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. This -SH model includes a high-temp Viton seal (0-150 C) and a piston magnet for CS1-B/DS1-B sensors.
Airtac SI125 Standard Cylinder SI125X140SH Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X140SH |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X140SH |
| Bore size | Ø125 mm |
| Stroke | 140 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 SAI125X140SH 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 SAI125X140SH 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 SI125X140SH
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×140 | 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 SI125X140SH Is Used
Heavy Stamping Press
Drives heavy tooling in automated stamping lines, utilizing the 6136 N push force at 0.5 MPa to form thick metal components reliably.
High-Temp Ejection
Ejects molded parts in heated environments up to 150 C, leveraging the Viton H seals to maintain integrity where standard NBR would fail.
Replacing the Airtac SI125 Standard Cylinder SI125X140SH with the SAI125X140SH
To replace the SI125X140SH, order the SAI125X140SH. Verify the ISO 15552 mounting interface, 140 mm stroke, G1/2 port, M27x2 rod thread, and the -S magnet / -H Viton seal. It drops directly into existing fixtures. For sizing, neighboring bores offer different forces: the 100 mm bore pushes 3927 N, while the 160 mm bore pushes 10053 N at 0.5 MPa. Because this cylinder has a 140 mm stroke, guide external loads to prevent rod bending. Note that a plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external pilot check valve, or specify the SAIL or BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X140SH
- ✓ 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 SI125X140SH FAQ
Yes, the SI125X140SH is discontinued. The direct replacement is the SAI125X140SH. It shares the same ISO 15552 mounting interface, 125 mm bore, 140 mm stroke, output force, G1/2 port, and accessories, fitting existing fixtures perfectly.
This double-acting cylinder has a G1/2 port. The force ratings are: 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 maximum of 1251 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X140SH
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X140SH replacement — usually within 7-8 hours.