This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X710, 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 SI125X710
The AirTAC SI125 Standard Cylinder SI125X710 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 710mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X710, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke710 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X710
- 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 SI125X710
The AirTAC SI125X710 is a discontinued double-acting ISO 15552 profile cylinder, delivering 6136 N push force at 0.5 MPa through its 125 mm bore. AirTAC replaced this legacy unit with the SAI125X710, a direct upgrade retaining the exact 710 mm stroke, G1/2 port, M27x2 rod thread, and ISO 15552 mounting interface for existing fixtures.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. Note this specific SKU lacks a magnet (-S) and cannot accept position sensors. For high-heat environments, Viton H seals raise the operating ceiling to 150 C, and the SAIL or BSAI lock variants provide load holding.
Airtac SI125 Standard Cylinder SI125X710 Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X710 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X710 |
| Bore size | Ø125 mm |
| Stroke | 710 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 SAI125X710 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 SAI125X710 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 SI125X710
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×710 | 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 SI125X710 Is Used
Heavy Stamp Press Feed
Drives robust 710 mm strokes to feed thick sheet metal into stamping presses, utilizing the 6136 N thrust to push heavy billets reliably.
Pallet Lift Ejection
Ejects loaded pallets from conveyors; the 313 kg vertical lift capacity handles substantial weight when guided by external rails.
Large Mold Actuation
Actuates oversized molding tools where the 125 mm bore and G1/2 port deliver the high volume and 11045 N force needed at 0.9 MPa.
Replacing the Airtac SI125 Standard Cylinder SI125X710 with the SAI125X710
To replace the SI125X710, order the SAI125X710 and verify your ISO 15552 mounting interface, G1/2 port thread (PT/G/NPT), and accessory type (LB, FA, TC, etc.). Because this SKU has no magnet, it cannot support legacy CS1-B/DS1-B sensors; if sensing is required, switch to an SAI125X710S. Sizing checks: the 125 mm bore yields 6136 N push at 0.5 MPa (8590 N at 0.7 MPa). If downward sizing is possible, an 80 mm bore offers 2513 N; if more force is needed, a 160 mm bore provides 10053 N. Standard cushions only decelerate the load; they do not hold position. For static holding on air loss, use the SAIL or BSAI lock variant, or an external pilot check valve. Finally, the 710 mm stroke demands external guide rails to prevent rod bending and side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X710
- ✓ 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 SI125X710 FAQ
Yes, the SI125X710 is discontinued. The direct replacement is the SAI125X710. It matches the ISO 15552 mounting interface, 125 mm bore, 710 mm stroke, output force, and G1/2 port size, fitting existing fixtures perfectly.
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. Speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X710
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X710 replacement — usually within 7-8 hours.