This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160AX650, 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 SI160AX650
The AirTAC Airtac SI160 Standard Cylinder SI160AX650 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 650mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI160AX650, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke650 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI160AX650
- 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 SI160AX650
The AirTAC SI160AX650 is a discontinued double-acting ISO 15552 profile cylinder with a 160 mm bore and 650 mm stroke. Delivering 10053 N push force at 0.5 MPa via a G3/4 port, it is replaced by the direct replacement SAI160AX650. The SAI upgrade shares the exact ISO 15552 mounting interface, bore, stroke, force, port and accessories, fitting existing fixtures perfectly.
The SAI160AX650 features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This SI unit has a SUS420J2 stainless rod (A option) but lacks a magnet, so it cannot take a sensor. For load holding, note that cushions only decelerate; use a SAIL lock or external pilot check valve.
Airtac SI160 Standard Cylinder SI160AX650 Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160AX650 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160AX650 |
| Bore size | Ø160 mm |
| Stroke | 650 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 SAI160AX650 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 SAI160AX650 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 SI160AX650
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×650 | 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 SI160AX650 Is Used
Heavy Machinery Forming
Drives large platens in metal forming presses where the 10053 N push force at 0.5 MPa handles substantial die resistance over the 650 mm travel.
Palletizer Lift Axes
Actuates heavy-load vertical lift carriages in automated palletizing systems, easily moving payloads up to the 512 kg vertical lift margin.
Large Mold Handling
Shifts heavy injection molds or tooling fixtures into and out of machines, utilizing the robust 40 mm SUS420J2 stainless rod for corrosion resistance.
Replacing the Airtac SI160 Standard Cylinder SI160AX650 with the SAI160AX650
To replace the SI160AX650, order the SAI160AX650. Verify the ISO 15552 mounting interface, 650 mm stroke, G3/4 port (PT/G/NPT thread), and your mounting accessory. Because this SKU lacks the -S magnet, it cannot accept CS1-B/DS1-B sensors; order a magnet-equipped SAI if position sensing is needed. Sizing both ways: the 160 mm bore yields 10053 N push at 0.5 MPa (2050 kgf max at 1.0 MPa); if lower force is acceptable, a 125 mm bore provides 6136 N push. For load holding on air loss, a plain cylinder drifts; use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. With a 650 mm stroke, prevent rod bending by guiding the load externally to avoid side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160AX650
- ✓ 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 SI160AX650 FAQ
Yes, the AirTAC SI160AX650 is discontinued and end-of-life. The direct replacement is the SAI160AX650. It is a true ISO 15552 profile cylinder that shares the exact same mounting interface, 160 mm bore, 650 mm stroke, output force, G3/4 port, and accessories, dropping directly into existing fixtures.
This double-acting cylinder features a G3/4 air port, a 40 mm rod, and M36x2 rod thread. Force output is 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 maximum of 2050 kgf at 1.0 MPa. Operating speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160AX650
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160AX650 replacement — usually within 7-8 hours.