This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125AX130S, 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 SI125AX130S
The AirTAC SI125 Standard Cylinder SI125AX130S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 130mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125AX130S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke130 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125AX130S
- 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 SI125AX130S
The AirTAC SI125AX130S is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 130 mm stroke. It delivers 6136 N push force at 0.5 MPa and features a G1/2 port. The direct replacement is the SAI125AX130S, which shares the identical mounting interface, output force, and dimensions.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. This -A variant uses a SUS420J2 stainless rod, and the -S magnet supports legacy CS1-B/DS1-B sensors. Note the SAI family adds SAIL, SAIF, and BSAI lock variants the SI lacked.
Airtac SI125 Standard Cylinder SI125AX130S Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125AX130S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125AX130S |
| Bore size | Ø125 mm |
| Stroke | 130 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 SAI125AX130S 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 SAI125AX130S 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 SI125AX130S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×130 | 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 SI125AX130S Is Used
Heavy Stamping
Drives large press dies and stamping fixtures requiring 6136 N of thrust at 0.5 MPa.
Pallet Handling
Indexes heavy pallets on conveyor lines using the 130 mm stroke and 125 mm bore power.
Clamp Actuation
Secures large workpieces in machining cells, benefiting from the SUS420J2 stainless rod.
Replacing the Airtac SI125 Standard Cylinder SI125AX130S with the SAI125AX130S
To replace the SI125AX130S, order the SAI125AX130S. Confirm the ISO 15552 mounting accessory (LB, FA, TC), the G1/2 port, and the -S magnet for CS1-B/DS1-B switches. The SAI uses current AirTAC switches. Size both ways: neighbouring bores are 100 mm (3927 N) and 160 mm (10053 N). At 0.5 MPa, push is 6136 N and pull is 5734 N. This plain cylinder does not hold load without live air; use an external rod lock or pilot check valve, or the SAIL/BSAI lock variant. The SUS420J2 rod suits corrosive settings. At 130 mm stroke, side-load is minimal, but always guide the rod for heavy loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125AX130S
- ✓ 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 SI125AX130S FAQ
Yes, the SI125AX130S is discontinued. The direct replacement is the SAI125AX130S. It is dimensionally interchangeable per ISO 15552, retaining the same 125 mm bore, 130 mm stroke, 6136 N force, and G1/2 port.
It features a G1/2 port. Force ratings are: push 6136 N and pull 5734 N at 0.5 MPa; push 8590 N at 0.7 MPa; push 11045 N at 0.9 MPa; with a theoretical max of 1251 kgf at 1.0 MPa. Speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125AX130S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125AX130S replacement — usually within 7-8 hours.