This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X160TC, 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 SI125X160TC
The AirTAC SI125 Standard Cylinder SI125X160TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 160mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X160TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke160 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X160TC
- 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 SI125X160TC
The AirTAC SI125X160TC is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 160 mm stroke. It delivers 6136 N push force at 0.5 MPa via a G1/2 port. AirTAC replaced this legacy unit with the SAI125X160TC, a direct upgrade sharing the exact ISO 15552 TC trunnion mounting interface, M27x2 rod thread and dimensions. The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life.
Because this specific SKU lacks the -S magnet suffix, it cannot accept position sensors. For load holding, note that a standard cylinder drifts on air loss; the cushion only decelerates. Use the SAIL or BSAI lock variants, or an external pilot check valve.
Airtac SI125 Standard Cylinder SI125X160TC Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X160TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X160TC |
| Bore size | Ø125 mm |
| Stroke | 160 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 SAI125X160TC 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 SAI125X160TC 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 SI125X160TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×160 | 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 SI125X160TC Is Used
Heavy Stamping Press
Drives large platens and stamping dies requiring high thrust, utilizing the 6136 N push force at 0.5 MPa to form thick metal components reliably.
Pallet Positioning
Shifts loaded pallets on heavy-duty conveyors, where the TC trunnion mount accommodates alignment shifts without binding during the 160 mm stroke.
Large Mold Clamping
Secures oversized injection molds or heavy fixtures, taking advantage of the 313 kg vertical lift capacity to hold substantial mass securely.
Replacing the Airtac SI125 Standard Cylinder SI125X160TC with the SAI125X160TC
To replace the discontinued SI125X160TC, order the SAI125X160TC. Confirm the ISO 15552 TC trunnion mount, 125 mm bore, 160 mm stroke, G1/2 port (PT/G/NPT thread options) and M27x2 rod. This SKU has no magnet, so it cannot fit CS1-B/DS1-B sensors; order an -S variant if sensing is needed. For sizing, the 125 mm bore yields 6136 N push at 0.5 MPa; if less force is required, the 100 mm bore offers 3927 N. For higher force, the 160 mm bore provides 10053 N. The 160 mm stroke is below the 1500 mm standard max, but always use guide rails to prevent rod bending under side loads. The SAI family also adds SAIL, SAIF and BSAI variants for locking and valve needs.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X160TC
- ✓ 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 SI125X160TC FAQ
Yes, the SI125X160TC is discontinued. The direct replacement is the SAI125X160TC. It shares the same ISO 15552 mounting interface, 125 mm bore, 160 mm stroke, G1/2 port and TC mount, but adds an upgraded piston seal for longer life.
The 125 mm bore provides 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 theoretical max of 1251 kgf at 1.0 MPa. Operating speed is 30-500 mm/s. It uses a G1/2 port and has a 40 mm adjustable cushion at each end.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X160TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X160TC replacement — usually within 7-8 hours.