This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160BX225S, 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 SI160BX225S
The AirTAC SI160 Standard Cylinder SI160BX225S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 225mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI160BX225S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke225 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI160BX225S
- 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 SI160BX225S
The AirTAC SI160BX225S is a discontinued double-acting ISO 15552 profile cylinder featuring a 160 mm bore and 225 mm stroke. Built with an extruded aluminium barrel and a SUS304 stainless piston rod (-B), it delivers 10053 N push and 9425 N pull at 0.5 MPa, operating at 30-500 mm/s through a G3/4 port. The direct replacement is the SAI160BX225S, matching the interface, force, and mounting.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family also adds SAIL, SAIF, and BSAI lock variants the SI lacked. This -S model retains a piston magnet for CS1-B/DS1-B sensors.
Airtac SI160 Standard Cylinder SI160BX225S Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160BX225S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160BX225S |
| Bore size | Ø160 mm |
| Stroke | 225 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 SAI160BX225S 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 SAI160BX225S 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 SI160BX225S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×225 | 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 SI160BX225S Is Used
Heavy Stamping Press
Drives large heavy-duty stamping presses requiring 10053 N push force at 0.5 MPa, utilising the 225 mm stroke to form thick metal components.
Automated Assembly Fixture
Clamps large fabricated structures in automated welding fixtures, taking advantage of the adjustable 50 mm air cushions at both ends.
Replacing the Airtac SI160 Standard Cylinder SI160BX225S with the SAI160BX225S
To replace the SI160BX225S, order the SAI160BX225S ensuring the ISO 15552 mounting interface, 225 mm stroke, G3/4 port, and mounting accessories match your fixture. The -B rod specifies SUS304 stainless steel, and the -S denotes the magnet for legacy CS1-B/DS1-B switches (the SAI uses current AirTAC switches). For sizing both ways, a 125 mm bore offers 6136 N push at 0.5 MPa, while a 200 mm bore yields 15708 N. At 225 mm, guide side-loads carefully to prevent rod bending. Note that a plain cylinder drifts on air loss as the cushion only decelerates; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160BX225S
- ✓ 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 SI160BX225S FAQ
Yes, the SI160BX225S is discontinued. The direct replacement is the SAI160BX225S. It is dimensionally interchangeable per ISO 15552, keeping the same 160 mm bore, 225 mm stroke, G3/4 port, and mounting interface.
It features a G3/4 port and provides 10053 N push and 9425 N pull at 0.5 MPa, 14074 N push at 0.7 MPa, 18095 N push at 0.9 MPa, and a theoretical max of 2050 kgf at 1.0 MPa. It operates at 30-500 mm/s with a 50 mm adjustable cushion.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160BX225S
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