This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125BX60S, 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 SI125BX60S
The AirTAC SI125 Standard Cylinder SI125BX60S 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 SAI125BX60S, 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 → SAI125BX60S
- 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 SI125BX60S
The AirTAC SI125BX60S is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 60 mm stroke. It delivers 6136 N push force at 0.5 MPa and features a SUS304 stainless steel rod (-B) alongside a built-in magnet (-S) for CS1-B/DS1-B sensors. The direct replacement is the SAI125BX60S, matching the G1/2 port, M27x2 thread, and 40 mm cushions.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. Note that plain cylinders drift without live air; for load holding, explore the SAIL lock or BSAI clamp-lock variants.
Airtac SI125 Standard Cylinder SI125BX60S Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125BX60S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125BX60S |
| 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 SAI125BX60S 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 SAI125BX60S 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 SI125BX60S
| 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 SI125BX60S Is Used
Heavy Stamping Press
Drives heavy-duty stamping and forming dies requiring the full 6136 N push force at 0.5 MPa, utilizing the SUS304 stainless rod for corrosion resistance in harsh shop environments.
Large Clamp Assembly
Secures large fabricated components during welding or machining, taking advantage of the 125 mm bore's robust clamping force and adjustable 40 mm air cushions.
Replacing the Airtac SI125 Standard Cylinder SI125BX60S with the SAI125BX60S
To replace the SI125BX60S, order the SAI125BX60S. It is dimensionally interchangeable per the ISO 15552 mounting interface, preserving the exact 125 mm bore, 60 mm stroke, 6136 N output, G1/2 port, and mounting fixtures. Retain your -B stainless rod and -S magnet specifications; the SAI uses current AirTAC switches instead of the legacy CS1-B/DS1-B. If sizing alternatives, a neighbouring 100 mm bore yields 3927 N push at 0.5 MPa, while a 160 mm bore increases it to 10053 N. Because this is a plain cylinder, it will not hold a load without air; use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants for secure holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125BX60S
- ✓ 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 SI125BX60S FAQ
Yes, the SI125BX60S is discontinued. The direct replacement is the SAI125BX60S. It is dimensionally interchangeable per ISO 15552, retaining the same 125 mm bore, 60 mm stroke, force, G1/2 port, and mounting interface.
The G1/2 port is fixed by the 125 mm bore. 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 maximum of 1251 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125BX60S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125BX60S replacement — usually within 7-8 hours.