This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160BX125, 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 SI160 Standard Cylinder SI160BX125
The AirTAC SI160 Standard Cylinder SI160BX125 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 125mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI160BX125, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke125 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI160BX125
- 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 SI160 Standard Cylinder SI160BX125
The AirTAC SI160BX125 is a discontinued double-acting ISO 15552 profile cylinder with a 160 mm bore and 125 mm stroke. It delivers a robust 10053 N push force at 0.5 MPa. AirTAC replaced this legacy unit with the SAI160BX125, a direct upgrade retaining the exact ISO 15552 mounting interface, G3/4 port, and M36x2 rod thread.
This SKU features a SUS304 stainless piston rod for corrosion resistance but lacks a magnet, so it cannot accept position switches. The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure.
Airtac SI160 Standard Cylinder SI160BX125 Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160BX125 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160BX125 |
| Bore size | Ø160 mm |
| Stroke | 125 mm |
| Acting type | Double acting |
| Port size | G3/4 |
| Rod thread | M36×2.0 |
| 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, 50 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI160BX125 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø160mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 10053 N | 9425 N |
| 0.7 MPa | 14074 N | — |
| Max (@1.0 MPa) | 2050 kgf | |
The SAI160BX125 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI160 Standard Cylinder SI160BX125
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×125 | 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 SI160 Standard Cylinder SI160BX125 Is Used
Heavy Press Operations
Drives substantial forming and stamping presses requiring up to 14074 N of thrust at 0.7 MPa.
Pallet Lift Stations
Lifts loaded pallets vertically, safely managing loads near the 512 kg vertical lift threshold.
Large Clamp Fixtures
Secures heavy fabricated components during machining using the robust 9425 N pull force.
Replacing the Airtac SI160 Standard Cylinder SI160BX125 with the SAI160BX125
To replace the SI160BX125, order the SAI160BX125 direct. Confirm the ISO 15552 mounting fixture, 125 mm stroke, and G3/4 port. This non-magnetic SKU cannot take sensors; legacy CS1-B/DS1-B switches are incompatible. If sizing up or down, compare neighbouring bores and their 0.5 MPa thrust. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock or pilot check valve for load holding, or step up to the SAIL or BSAI lock variants. The Viton H seal option extends operation to 150 C.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160BX125
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI160 Standard Cylinder SI160BX125 FAQ
Yes, the SI160BX125 is discontinued. The direct replacement is the AirTAC SAI160BX125. It shares the identical ISO 15552 mounting interface, 160 mm bore, 125 mm stroke, output force, and G3/4 port, fitting directly into existing fixtures.
The G3/4 port bore delivers a push force of 10053 N and a pull force of 9425 N at 0.5 MPa. At 0.7 MPa the push force is 14074 N, and at 0.9 MPa it is 18095 N. The theoretical maximum force is 2050 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160BX125
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160BX125 replacement — usually within 7-8 hours.