This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X1000TC, 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 SI125X1000TC
The AirTAC SI125 Standard Cylinder SI125X1000TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 1000mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X1000TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke1000 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X1000TC
- 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 SI125X1000TC
The AirTAC SI125X1000TC is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 1000 mm stroke. Delivering 6136 N push force at 0.5 MPa via a G1/2 port, it is replaced by the SAI125X1000TC. This direct successor matches the exact bore, stroke, force, port and TC trunnion mounting interface.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. This SKU lacks a magnet, so it cannot take a sensor. For high heat, Viton H seals raise the limit to 150 C.
Airtac SI125 Standard Cylinder SI125X1000TC Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X1000TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X1000TC |
| Bore size | Ø125 mm |
| Stroke | 1000 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 SAI125X1000TC 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 SAI125X1000TC 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 SI125X1000TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×1000 | 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 SI125X1000TC Is Used
Heavy Material Lifts
Raises heavy platens over 1000 mm where the 6136 N push force at 0.5 MPa easily shifts heavy fabrication assemblies.
Pallet Diversion
TC trunnion mount absorbs moment loads while actuating large pallet stops or routing gates on high-capacity lines.
Automated Storage
Drives 1-meter vertical shuttle carriages in dense ASRS racks, relying on external guides to prevent rod bending.
Replacing the Airtac SI125 Standard Cylinder SI125X1000TC with the SAI125X1000TC
To replace the SI125X1000TC, order the SAI125X1000TC with the same TC trunnion mount, 125 mm bore, 1000 mm stroke, and G1/2 port. Verify your thread option (PT/G/NPT). Since this SKU has no -S magnet, it cannot accept CS1-B/DS1-B sensors. At 1000 mm, the 32 mm rod is prone to bending under side-load, so use external guides to prevent damage. For sizing, a 100 mm bore yields 3927 N [email protected], while a 160 mm bore yields 10053 N. The air cushion only decelerates; it does not hold load on air loss. For held loads, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X1000TC
- ✓ 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 SI125X1000TC FAQ
Yes, the SI125X1000TC is discontinued. The direct replacement is the SAI125X1000TC. It is dimensionally interchangeable per ISO 15552, retaining the same 125 mm bore, 1000 mm stroke, G1/2 port, force, and TC trunnion mounting interface.
It features a G1/2 air port. The thrust is 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. Speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X1000TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X1000TC replacement — usually within 7-8 hours.