This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125AX60S, 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 SI125AX60S
The AirTAC SI125 Standard Cylinder SI125AX60S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 60mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125AX60S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke60 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125AX60S
- 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 SI125AX60S
The AirTAC SI125AX60S is a discontinued double-acting ISO 15552 profile cylinder featuring a 125 mm bore and 60 mm stroke. It delivers 6136 N push force at 0.5 MPa and includes a SUS420J2 stainless steel rod and a piston magnet for position sensing. The direct replacement is the SAI125AX60S, which matches the original G1/2 port, M27x2 thread, and ISO 15552 mounting dimensions exactly.
The SAI upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure and longer life. Note that a standard cylinder drifts without live air; the cushion only decelerates. For load holding, explore the SAIL or BSAI lock variants.
Airtac SI125 Standard Cylinder SI125AX60S Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125AX60S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125AX60S |
| Bore size | Ø125 mm |
| Stroke | 60 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 SAI125AX60S 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 SAI125AX60S 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 SI125AX60S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×60 | 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 SI125AX60S Is Used
Pallet Lift Station
Raises heavy loaded pallets using the 6136 N push force at 0.5 MPa, relying on the ISO 15552 profile barrel for rigid mounting.
Injection Mold Clamp
Secures heavy industrial molds with the SUS420J2 stainless rod resisting moisture, while the 60 mm stroke provides rapid clamping action.
Replacing the Airtac SI125 Standard Cylinder SI125AX60S with the SAI125AX60S
To replace the SI125AX60S, order the SAI125AX60S. Verify your ISO 15552 mounting interface, the G1/2 air port, and the M27x2 rod thread. Because this unit has the -S magnet and -A stainless rod, confirm those options on the SAI order; the legacy CS1-B/DS1-B sensors transition to current AirTAC switches. If you need more force than the 6136 N at 0.5 MPa, step up to a 160 mm bore; if less is required, a 100 mm bore provides 3927 N. Remember that a plain cylinder does not hold load on air loss—use an external rod lock or pilot check valve, or specify a SAIL/BSAI lock variant. At 60 mm stroke, rod buckling is negligible, but always guide external loads to prevent side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125AX60S
- ✓ 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 SI125AX60S FAQ
Yes, the SI125AX60S is discontinued. The direct replacement is the SAI125AX60S. It shares the same ISO 15552 mounting interface, 125 mm bore, 60 mm stroke, G1/2 port, and output force, dropping directly into existing fixtures.
This 125 mm bore cylinder uses a G1/2 air port. The thrust 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 force of 1251 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125AX60S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125AX60S replacement — usually within 7-8 hours.