This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125BX95S, 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 SI125BX95S
The AirTAC SI125 Standard Cylinder SI125BX95S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 95mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125BX95S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke95 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125BX95S
- 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 SI125BX95S
The AirTAC SI125BX95S is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 95 mm stroke. It delivers 6136 N push force at 0.5 MPa and features a SUS304 stainless steel rod, G1/2 port, and a built-in magnet for CS1-B/DS1-B sensors. The direct replacement is the SAI125BX95S, sharing the same interface, force, and mounting.
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; use a SAIL lock or external pilot check valve for load holding.
Airtac SI125 Standard Cylinder SI125BX95S Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125BX95S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125BX95S |
| Bore size | Ø125 mm |
| Stroke | 95 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 SAI125BX95S 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 SAI125BX95S 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 SI125BX95S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×95 | 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 SI125BX95S Is Used
Heavy Stamping Press
Drives large heavy-duty stamping actuators, utilizing the 6136 N push force to form thick metal components reliably.
Pallet Stopper Gate
Acts as a high-force stopping barrier on conveyor lines, securely halting fully loaded pallets before dispatch.
Lift Gate Actuator
Raises and lowers substantial material lift gates, where the SUS304 stainless rod resists moisture and environmental wear.
Replacing the Airtac SI125 Standard Cylinder SI125BX95S with the SAI125BX95S
To replace the SI125BX95S, order the SAI125BX95S and verify the ISO 15552 mounting interface, 125 mm bore, 95 mm stroke, G1/2 port, and magnet. The -B code indicates a SUS304 stainless rod, crucial for corrosive settings. If downsizing, an 80 mm bore yields 2513 N at 0.5 MPa; if upsizing, a 160 mm bore provides 10053 N. This cylinder operates at 30-500 mm/s. Because it lacks a lock, load holding requires an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. The 95 mm stroke is under 300 mm, so severe rod-bending side loads are minimal, but proper alignment is still advised.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125BX95S
- ✓ 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 SI125BX95S FAQ
Yes, the SI125BX95S is discontinued. The direct replacement is the SAI125BX95S. It is dimensionally interchangeable per ISO 15552, retaining the same 125 mm bore, 95 mm stroke, G1/2 port, and mounting fixtures.
It features a G1/2 port. The 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 SAI125BX95S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125BX95S replacement — usually within 7-8 hours.