This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X160SN, 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 SI125X160SN
The AirTAC SI125 Standard Cylinder SI125X160SN 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 SAI125X160SN, 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 → SAI125X160SN
- 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 SI125X160SN
The AirTAC SI125X160SN is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 160 mm stroke. Delivering 6136 N push force at 0.5 MPa through a G1/2 port, it is replaced by the SAI125X160SN. This direct successor shares the exact ISO 15552 mounting interface, bore, and output force, fitting existing fixtures perfectly.
The SAI upgrade features a revised piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. It retains the NBR seals (-20 to +70 C) and magnet for legacy CS1-B/DS1-B sensors. For load holding, note that standard cylinders drift on air loss; use an external rod lock or the SAIL/BSAI variants.
Airtac SI125 Standard Cylinder SI125X160SN Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X160SN |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X160SN |
| 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 SAI125X160SN 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 SAI125X160SN 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 SI125X160SN
| 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 SI125X160SN Is Used
Heavy-Duty Pressing
Applies the 6136 N push force at 0.5 MPa to seat bearings and assemble large mechanical components securely.
Pallet Diversion
Uses the 160 mm stroke to push heavy loaded pallets onto secondary packaging lines at high throughput.
Replacing the Airtac SI125 Standard Cylinder SI125X160SN with the SAI125X160SN
To replace the SI125X160SN, order the SAI125X160SN. Confirm the ISO 15552 mounting interface, 125 mm bore, 160 mm stroke, G1/2 port, and your specific mounting accessory (LB, FA, TC, etc.). The -S magnet and -N NBR seals are retained. For sizing, neighbouring bores offer different forces: a 100 mm bore provides 3927 N push at 0.5 MPa, while a 160 mm bore yields 10053 N. If your stroke was 300 mm or longer, ensure adequate guide rails to prevent rod bending and side-load wear. Because a plain cylinder does not hold load without live air, integrate a pilot-operated check valve or explore the SAIL air-released lock or BSAI clamp-lock variants for secure positioning.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X160SN
- ✓ 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 SI125X160SN FAQ
Yes, the AirTAC SI125X160SN is discontinued. The direct replacement is the SAI125X160SN. It shares the same ISO 15552 mounting interface, 125 mm bore, 160 mm stroke, output force, and G1/2 port, fitting directly into your existing fixtures.
The G1/2 port feeds a 32 mm rod. 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 max of 1251 kgf at 1.0 MPa. Operating speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X160SN
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X160SN replacement — usually within 7-8 hours.