This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160AX25S, 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 SI160AX25S
The AirTAC SI160 Standard Cylinder SI160AX25S 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 SAI160AX25S, 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 → SAI160AX25S
- 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 SI160AX25S
The AirTAC SI160AX25S 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, featuring a G3/4 port, M36x2 rod thread, and a 50 mm adjustable air cushion. The direct replacement is the SAI160AX25S, which retains the exact same interface, bore, stroke, force, and port dimensions.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. This SI unit has an -A SUS420J2 stainless rod and an -S magnet for legacy CS1-B/DS1-B sensors. Note that a plain cylinder drifts on air loss; for load holding, use the SAIL or BSAI lock variants.
Airtac SI160 Standard Cylinder SI160AX25S Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160AX25S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160AX25S |
| 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 SAI160AX25S 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 SAI160AX25S 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 SI160AX25S
| 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 SI160AX25S Is Used
Heavy-Duty Pressing
Applies the 14074 N push force at 0.7 MPa to seat large bearings or form heavy-gauge metal components in automated machinery.
High-Force Clamping
Secures massive workpieces during machining operations, utilizing the 9425 N pull force at 0.5 MPa for rigid, zero-movement holding.
Industrial Platen Actuation
Drives short-stroke platens in heavy manufacturing lines, benefiting from the 50 mm adjustable air cushions to cushion the high moving mass.
Replacing the Airtac SI160 Standard Cylinder SI160AX25S with the SAI160AX25S
To replace the SI160AX25S, order the SAI160AX25S, confirming the ISO 15552 mounting interface, 160 mm bore, 25 mm stroke, G3/4 port, and -S magnet. The -A suffix indicates a SUS420J2 stainless rod, and the SAI family uses current AirTAC switches instead of the legacy CS1-B/DS1-B. If you need to size both ways, a 125 mm bore offers 6136 N push at 0.5 MPa, while a 200 mm bore yields 15708 N. Because this is a plain double-acting cylinder, it cannot hold a load without live air—the cushions only decelerate. For secure holding, consider the SAIL air-released lock, the BSAI clamp-lock, or an external pilot check valve. The 25 mm stroke is very short, so side-load risks are minimal, but always verify guide alignment.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160AX25S
- ✓ 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 SI160AX25S FAQ
Yes, the SI160AX25S is discontinued. The direct replacement is the SAI160AX25S. It is dimensionally interchangeable per ISO 15552, maintaining the same 160 mm bore, 25 mm stroke, G3/4 port, and mounting interface.
This double-acting cylinder has a G3/4 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 SAI160AX25S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160AX25S replacement — usually within 7-8 hours.