This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X160, 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 SI125X160
The AirTAC SI125 Standard Cylinder SI125X160 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 160mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X160, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke160 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X160
- 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 SI125X160
The AirTAC SI125X160 is a discontinued double-acting ISO 15552 profile cylinder with a 125mm bore and 160mm stroke, delivering 6136N push force at 0.5MPa via a G1/2 port. Because this exact SKU lacks the -S magnet suffix, it cannot accept a position sensor.
Order the direct replacement SAI125X160 to restore function without altering fixtures. The SAI upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure, and introduces SAIL and BSAI lock variants the SI lacked.
Airtac SI125 Standard Cylinder SI125X160 Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X160 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X160 |
| Bore size | Ø125 mm |
| Stroke | 160 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 SAI125X160 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 SAI125X160 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 SI125X160
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×160 | 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 SI125X160 Is Used
Heavy-Duty Pressing
Drives large stamping or forming dies requiring substantial linear thrust, utilising the 6136N push force available at just 0.5 MPa.
Pallet Handling
Actuates heavy load diverters and lifting stops in high-capacity conveyor lines, taking advantage of the 160mm stroke and robust 32mm rod.
Automated Clamping
Secures large fabricated components during machining or welding, providing reliable holding power in demanding industrial environments.
Replacing the Airtac SI125 Standard Cylinder SI125X160 with the SAI125X160
To replace the SI125X160, specify the SAI125X160 to retain the exact ISO 15552 mounting interface, 125mm bore, 160mm stroke, M27x2 rod thread, and G1/2 port. Confirm your mounting accessory (LB, FA, TC) and thread standard (PT, G, NPT). Since this SKU has no magnet, you cannot mount legacy CS1-B/DS1-B sensors; order an -S variant if sensing is needed. For sizing, the 125mm bore yields 6136N push at 0.5MPa, whereas the neighbouring 100mm bore offers 3927N. Note that a plain cylinder drifts on air loss—the cushion only decelerates—so use an external pilot check valve or the SAIL/BSAI lock variant for load holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X160
- ✓ 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 SI125X160 FAQ
Yes, the SI125X160 is discontinued. The direct replacement is the AirTAC SAI125X160. It shares the exact same ISO 15552 mounting interface, 125mm bore, 160mm stroke, output force, and G1/2 port, fitting directly into your existing fixtures.
The 125mm bore features a G1/2 air port and M27x2 rod thread. It generates 6136N push and 5734N pull at 0.5 MPa, 8590N push at 0.7 MPa, 11045N push at 0.9 MPa, and a theoretical maximum of 1251 kgf at 1.0 MPa. Operating speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X160
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X160 replacement — usually within 7-8 hours.