This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X150CA, 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 SI125X150CA
The AirTAC Airtac SI125 Standard Cylinder SI125X150CA is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 150mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X150CA, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke150 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X150CA
- 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 SI125X150CA
The AirTAC SI125X150CA is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 150 mm stroke. Built with an extruded aluminium barrel and adjustable air cushions, it delivers a push force of 6136 N and pull force of 5734 N at 0.5 MPa. The direct replacement is the SAI125X150CA, which retains the identical CA clevis mount, G1/2 port, and output force. Because this specific SKU lacks the -S magnet suffix, it cannot accept a position sensor.
The SAI upgrade introduces a refined piston seal featuring two Y-shaped one-way elements for low start-up pressure and extended life. For applications requiring load holding on air loss, the SAI family adds the SAIL air-released lock and BSAI clamp-lock variants that the legacy SI lacked.
Airtac SI125 Standard Cylinder SI125X150CA Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X150CA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X150CA |
| Bore size | Ø125 mm |
| Stroke | 150 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 SAI125X150CA 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 SAI125X150CA 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 SI125X150CA
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×150 | 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 SI125X150CA Is Used
Heavy Pressing Operations
Applies 6136 N of thrust at 0.5 MPa for securing heavy components during assembly, pressing bearings, or forming metal parts in automated machinery.
Pallet Diverting
Utilizes the CA clevis mount to pivot and redirect loaded pallets up to 313 kg on conveyors, relying on the adjustable 40 mm cushions to absorb end-of-stroke impact.
Large Mold Handling
Shifts substantial tooling or molds within a fabrication cell, taking advantage of the 32 mm piston rod and M27x2 thread for robust mechanical attachment.
Replacing the Airtac SI125 Standard Cylinder SI125X150CA with the SAI125X150CA
To replace the discontinued SI125X150CA, order the SAI125X150CA. Confirm the ISO 15552 CA clevis mounting interface, 125 mm bore, 150 mm stroke, and G1/2 port. This non-magnetic SKU cannot support sensors; if position detection is needed, select an SAI model with the -S suffix for CS1-B/DS1-B compatibility. When sizing, neighbouring bores offer different forces: the 100 mm bore provides 3927 N push at 0.5 MPa, while the 160 mm bore yields 10053 N. Note that a plain cylinder does not hold load without live air; for vertical or suspended loads, use the SAIL lock variant, BSAI clamp-lock, or an external pilot check valve. The 150 mm stroke is under the 300 mm threshold, so rod-bending side-load risks are minimal, but always ensure linear guidance.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X150CA
- ✓ 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 SI125X150CA FAQ
Yes, the AirTAC SI125X150CA is discontinued. The direct replacement is the SAI125X150CA. It is dimensionally interchangeable per ISO 15552, retaining the same CA clevis mount, 125 mm bore, 150 mm stroke, G1/2 port, and output force.
The bore is 125 mm with a G1/2 air port. At 0.5 MPa it provides 6136 N push and 5734 N 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 SAI125X150CA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X150CA replacement — usually within 7-8 hours.