This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125BX60, 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 SI125BX60
The AirTAC Airtac SI125 Standard Cylinder SI125BX60 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 SAI125BX60, 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 → SAI125BX60
- 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 SI125BX60
The AirTAC SI125BX60 is a discontinued double-acting ISO 15552 profile cylinder featuring a 125 mm bore, 60 mm stroke, and a SUS304 stainless steel piston rod. It delivers 6136 N push force at 0.5 MPa. The direct replacement is the SAI125BX60, matching the bore, stroke, G1/2 port, and ISO 15552 mounting interface exactly.
This non-magnetic SKU cannot accept a sensor. The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure. Note the 40 mm cushions only decelerate; use SAIL or BSAI for load holding.
Airtac SI125 Standard Cylinder SI125BX60 Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125BX60 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125BX60 |
| 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 SAI125BX60 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 SAI125BX60 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 SI125BX60
| 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 SI125BX60 Is Used
Heavy Stamping Press
Drives large heavy-duty stamping dies requiring high thrust, utilizing the 6136 N push force at 0.5 MPa with the corrosion-resistant SUS304 rod.
Pallet Redirector
Actuates robust routing gates on high-capacity conveyor lines, handling substantial side loads via the 32 mm piston rod over the 60 mm stroke.
Wood Processing Clamp
Secures thick timber or composite beams during cutting operations, relying on the 125 mm bore's 1251 kgf maximum theoretical holding force.
Replacing the Airtac SI125 Standard Cylinder SI125BX60 with the SAI125BX60
To replace the SI125BX60, order the SAI125BX60. Verify the ISO 15552 mounting interface, the 60 mm stroke, the G1/2 port, and the SUS304 rod. Because this SKU lacks the -S magnet, it cannot use CS1-B/DS1-B sensors; order a magnet-equipped SAI if position sensing is required. The 125 mm bore yields 6136 N push at 0.5 MPa (1251 kgf max at 1.0 MPa); if less force is needed, an 80 mm bore gives 2513 N, while a 160 mm bore offers 10053 N. The 40 mm cushions only decelerate the load; for dead-load holding on air loss, specify an external pilot check valve or the SAIL/BSAI lock variant. The M27x2 rod thread and 30-500 mm/s speed range remain unchanged.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125BX60
- ✓ 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 SI125BX60 FAQ
Yes, the SI125BX60 is discontinued. The direct replacement is the SAI125BX60. It shares the identical ISO 15552 mounting interface, 125 mm bore, 60 mm stroke, G1/2 port, and force ratings, fitting existing fixtures perfectly while adding an upgraded piston seal.
The G1/2 port is fixed by the 125 mm bore. At 0.5 MPa it provides 6136 N push and 5734 pull force. At 0.7 MPa push is 8590 N, and at 0.9 MPa it is 11045 N. The theoretical maximum force is 1251 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125BX60
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