This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160BX25S, 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 SI160BX25S
The AirTAC SI160 Standard Cylinder SI160BX25S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 25mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI160BX25S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke25 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI160BX25S
- 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 SI160BX25S
The AirTAC SI160BX25S is a discontinued double-acting ISO 15552 profile cylinder with a 160 mm bore and 25 mm stroke. It delivers 10053 N push force at 0.5 MPa through a G3/4 port. The direct replacement is the SAI160BX25S, sharing the same interface, force, and mounting. This unit features a SUS304 stainless steel rod (-B) and a piston magnet (-S) for CS1-B/DS1-B sensors.
Upgrading to the SAI brings an advanced two Y-shaped one-way piston seal for low start-up pressure and long life. For load holding, note that a standard cylinder drifts without air; use a pilot check valve or the SAI family's SAIL lock or BSAI clamp-lock variants.
Airtac SI160 Standard Cylinder SI160BX25S Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160BX25S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160BX25S |
| Bore size | Ø160 mm |
| Stroke | 25 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 SAI160BX25S 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 SAI160BX25S 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 SI160BX25S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×25 | 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 SI160BX25S Is Used
Heavy Press Clamping
Uses the 10053 N push force at 0.5 MPa to secure heavy metal fabrication parts during machining or welding operations.
High-Force Ejection
Ejects dense molded products or compressed materials from hydraulic presses using the 18095 N output available at 0.9 MPa.
Replacing the Airtac SI160 Standard Cylinder SI160BX25S with the SAI160BX25S
To replace the discontinued SI160BX25S, order the SAI160BX25S, matching the ISO 15552 mounting interface, 160 mm bore, 25 mm stroke, G3/4 port, and mounting accessories. The -B suffix specifies the SUS304 stainless rod, and -S confirms the magnet for legacy CS1-B/DS1-B sensors (the SAI uses current AirTAC switches). For sizing, this bore yields 10053 N push at 0.5 MPa; if less force is needed, a 125 mm bore provides 6136 N. Because this is a short 25 mm stroke, side-load risks are minimal, but always guide external loads. Remember, air cushions only decelerate; they do not hold loads. For static holding, select the SAIL or BSAI lock variant, or add an external rod lock.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160BX25S
- ✓ 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 SI160BX25S FAQ
Yes, the SI160BX25S is discontinued. The direct replacement is the SAI160BX25S. It is dimensionally interchangeable per ISO 15552, retaining the same 160 mm bore, 25 mm stroke, G3/4 port, and mounting fixtures.
This double-acting cylinder uses a G3/4 air port. It 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 SAI160BX25S
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