This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X30TC, 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 SI125X30TC
The AirTAC SI125 Standard Cylinder SI125X30TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 30mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X30TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke30 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X30TC
- 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 SI125X30TC
The AirTAC SI125X30TC is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 30 mm stroke. Delivering 6136 N push force at 0.5 MPa, it is replaced by the SAI125X30TC. This direct successor matches the bore, stroke, G1/2 port, and TC trunnion mounting interface exactly.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. Without a -S suffix, this SKU lacks a magnet and cannot accept CS1-B/DS1-B sensors.
Airtac SI125 Standard Cylinder SI125X30TC Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X30TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X30TC |
| Bore size | Ø125 mm |
| Stroke | 30 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 SAI125X30TC 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 SAI125X30TC 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 SI125X30TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×30 | 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 SI125X30TC Is Used
Heavy Stamping
Provides robust 6136 N push force at 0.5 MPa for short-stroke pressing and forming tasks.
Clamp Operations
Ideal for securing heavy workpieces in automated machining centers using TC trunnion mounts.
Pallet Stops
Functions as a high-force end-stop for heavy material handling lines and pallet routing.
Replacing the Airtac SI125 Standard Cylinder SI125X30TC with the SAI125X30TC
To replace the SI125X30TC, order the SAI125X30TC. Confirm the ISO 15552 TC trunnion mounting, 125 mm bore, 30 mm stroke, and G1/2 port. Because this SKU has no -S magnet, it cannot hold a sensor; order a magnet-equipped SAI if position detection is needed. At 0.5 MPa it yields 6136 N push; sizing down, an 80 mm bore gives 2513 N. For load holding on air loss, note the cushion only decelerates; use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X30TC
- ✓ 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 SI125X30TC FAQ
Yes, the SI125X30TC is discontinued. The direct replacement is the SAI125X30TC. It shares the same ISO 15552 TC mounting interface, 125 mm bore, 30 mm stroke, and G1/2 port, fitting existing fixtures perfectly.
At 0.5 MPa it pushes 6136 N and pulls 5734 N. At 0.7 MPa push is 8590 N, and at 0.9 MPa it is 11045 N. The theoretical max is 1251 kgf at 1.0 MPa. Operating speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X30TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X30TC replacement — usually within 7-8 hours.