This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X83, 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 SI125X83
The AirTAC SI125 Standard Cylinder SI125X83 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 83mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X83, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke83 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X83
- 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 SI125X83
The AirTAC SI125X125 is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel, delivering 6136 N push force at 0.5 MPa. It features a 32 mm rod, M27x2 thread, and a G1/2 port. AirTAC replaced this legacy unit with the SAI125X125, a direct upgrade sharing the exact ISO 15552 mounting interface, bore, stroke, and accessories.
The SAI replacement introduces an upgraded piston seal utilizing two Y-shaped one-way elements for low start-up pressure and extended life. Note that this specific SKU lacks a magnet (-S) and therefore cannot accept position sensors like the legacy CS1-B or DS1-B switches.
Airtac SI125 Standard Cylinder SI125X83 Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X83 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X83 |
| Bore size | Ø125 mm |
| Stroke | 83 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 SAI125X83 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 SAI125X83 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 SI125X83
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×83 | 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 SI125X83 Is Used
Heavy Stamping Press
Drives large heavy-duty stamping dies requiring high thrust, utilizing the 6136 N push force at 0.5 MPa to form thick steel plates.
Automated Clamp Fixture
Secures large automotive components during machining, using the adjustable 40 mm air cushions to decelerate the 32 mm rod at stroke end.
Replacing the Airtac SI125 Standard Cylinder SI125X83 with the SAI125X83
To replace the discontinued SI125X125, order the SAI125X125. Verify your existing fixture matches the ISO 15552 mounting interface dimensions, the G1/2 port size, and your chosen mounting accessory (LB, FA, or TC). Because this SKU lacks the -S magnet, it cannot support sensing; if you require position feedback, select the SAI125X125S instead. For sizing alternatives, the neighboring 100 mm bore provides 3927 N push at 0.5 MPa, while the 160 mm bore offers 10053 N. Remember that a standard cylinder does not hold load on air loss—the cushion only decelerates. For load holding, consider the SAIL or BSAI lock variants, or an external pilot check valve. Speed for this 125 mm bore is 30-500 mm/s.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X83
- ✓ 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 SI125X83 FAQ
Yes, the AirTAC SI125X125 is discontinued. The direct replacement is the SAI125X125. It shares the exact ISO 15552 mounting interface, bore, stroke, force, and G1/2 port, fitting existing fixtures perfectly while adding an upgraded piston seal.
This 125 mm bore cylinder features a G1/2 port. It delivers a push force of 6136 N and a pull force of 5734 N at 0.5 MPa. At 0.7 MPa the push force is 8590 N, and the theoretical maximum is 1251 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X83
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X83 replacement — usually within 7-8 hours.