This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X470, 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 SI125X470
The AirTAC SI125 Standard Cylinder SI125X470 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 470mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X470, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke470 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X470
- 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 SI125X470
The AirTAC SI125X470 is a discontinued double-acting ISO 15552 profile cylinder delivering 6136 N push force at 0.5 MPa through a 125 mm bore and 470 mm stroke. It features a Ø32 mm rod, M27x2 thread, and G1/2 port. The direct replacement is the SAI125X470, matching the interface, force, and mounting exactly.
This SKU lacks a magnet and cannot accept a sensor. The SAI upgrade uses two Y-shaped one-way piston seals for low start-up pressure. For load holding, note the air cushion only decelerates; use an external rod lock or SAIL variant.
Airtac SI125 Standard Cylinder SI125X470 Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X470 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X470 |
| Bore size | Ø125 mm |
| Stroke | 470 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 SAI125X470 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 SAI125X470 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 SI125X470
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×470 | 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 SI125X470 Is Used
Heavy Stamping Press
Drives large dies and heavy platens in metal forming, utilizing the 6136 N push force at 0.5 MPa to shape thick steel components reliably.
Mold Clamping Fixture
Secures large injection molds on machining centers, requiring the robust 125 mm bore and M27x2 rod thread to maintain rigid positioning.
Replacing the Airtac SI125 Standard Cylinder SI125X470 with the SAI125X470
To replace the SI125X470, order the SAI125X470, confirming the ISO 15552 mounting, 470 mm stroke, and G1/2 port. Because this non-magnet SKU cannot take a switch, add a CS1-B/DS1-B sensor only if migrating to an -S version. For sizing, neighboring bores offer different forces: the 100 mm bore yields 3927 N [email protected], while the 160 mm bore yields 10053 N. At 470 mm stroke, prevent rod bending by using an external guide to absorb side loads. A plain cylinder drifts on air loss; for held loads, specify a pilot check valve or the BSAI clamp-lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X470
- ✓ 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 SI125X470 FAQ
Yes, the SI125X470 is discontinued. The direct replacement is the AirTAC SAI125X470. It is dimensionally interchangeable per ISO 15552, retaining the same 125 mm bore, 470 mm stroke, G1/2 port, and mounting fixtures.
The G1/2 port bore delivers 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 maximum theoretical force of 1251 kgf at 1.0 MPa. It operates at 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X470
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X470 replacement — usually within 7-8 hours.