This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125BX160TC, 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 SI125BX160TC
The AirTAC SI125 Standard Cylinder SI125BX160TC 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 SAI125BX160TC, 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 → SAI125BX160TC
- 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 SI125BX160TC
The AirTAC SI125BX160TC is a discontinued double-acting ISO 15552 profile cylinder with a 125mm bore and 160mm stroke. Delivering 6136N push force at 0.5MPa via a G1/2 port, it is replaced by the SAI125BX160TC. This direct successor matches the exact ISO 15552 mounting interface, TC trunnion, M27x2 rod thread and output force, fitting existing fixtures seamlessly.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. This specific SKU uses a SUS304 stainless steel rod (B option) for corrosion resistance but lacks a magnet, so it cannot accept CS1-B/DS1-B sensors. For load holding, note that air cushions only decelerate; use an external rod lock or SAIL/BSAI variant.
Airtac SI125 Standard Cylinder SI125BX160TC Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125BX160TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125BX160TC |
| 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 SAI125BX160TC 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 SAI125BX160TC 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 SI125BX160TC
| 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 SI125BX160TC Is Used
Heavy Press Clamping
Secures large metal castings during machining operations, utilizing the 6136N push force and robust SUS304 rod to withstand harsh coolant environments.
Bulk Material Diversion
Drives large-scale sorting flaps on high-throughput packaging lines, relying on the 40mm adjustable air cushions to decelerate the 32mm rod smoothly.
Replacing the Airtac SI125 Standard Cylinder SI125BX160TC with the SAI125BX160TC
To replace the discontinued SI125BX160TC, order the SAI125BX160TC. Confirm the ISO 15552 TC trunnion mounting, 125mm bore, 160mm stroke, G1/2 port (PT/G/NPT thread options) and SUS304 rod. Because this SKU has no -S magnet, it cannot support position sensing; if switches are needed, select an SAI model with the magnet option and CS1-B/DS1-B equivalent sensors. For sizing, the 125mm bore yields 6136N push at 0.5MPa; if less force is needed, an 80mm bore provides 2513N, while a 160mm bore offers 10053N. A plain cylinder drifts on air loss—the cushion only decelerates—so for holding loads consider the SAIL lock, BSAI clamp-lock, or an external pilot check valve. Since the stroke is 160mm, ensure adequate guide support to prevent rod bending under side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125BX160TC
- ✓ 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 SI125BX160TC FAQ
Yes, the SI125BX160TC is discontinued. The direct replacement is the SAI125BX160TC. It is dimensionally interchangeable per ISO 15552, retaining the same 125mm bore, 160mm stroke, G1/2 port, TC mount, and force ratings.
It features a G1/2 port and delivers 6136N push / 5734N pull at 0.5MPa, 8590N push at 0.7MPa, 11045N push at 0.9MPa, and a theoretical max of 1251 kgf at 1.0MPa. The rod is SUS304 stainless steel, and it operates at 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125BX160TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125BX160TC replacement — usually within 7-8 hours.