This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160AX850S, 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 SI160AX850S
The AirTAC SI160 Standard Cylinder SI160AX850S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 850mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI160AX850S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke850 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI160AX850S
- 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 SI160AX850S
The AirTAC SI160AX850S is a discontinued double-acting ISO 15552 profile cylinder with a 160 mm bore and 850 mm stroke. Featuring a SUS420J2 stainless piston rod and a built-in magnet for CS1-B/DS1-B sensors, it delivers a push force of 10053 N at 0.5 MPa. AirTAC replaced this legacy unit with the SAI160AX850S, a direct replacement sharing the exact same ISO 15552 mounting interface, G3/4 port, and 2050 kgf maximum force.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. Note that a standard cylinder drifts without live air; for load holding, consider the SAIL or BSAI lock variants.
Airtac SI160 Standard Cylinder SI160AX850S Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160AX850S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160AX850S |
| Bore size | Ø160 mm |
| Stroke | 850 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 SAI160AX850S 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 SAI160AX850S 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 SI160AX850S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×850 | 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 SI160AX850S Is Used
Heavy Machinery Forming
Drives large press beds or forming dies requiring substantial 10053 N push force over an extended 850 mm travel distance.
Pallet Lift Actuation
Actuates heavy-duty material lifts, safely moving vertical loads up to 512 kg while benefiting from the adjustable 50 mm cushions.
Automated Assembly Press
Provides steady, high-thrust clamping for large component assembly, utilizing the SUS420J2 stainless rod for corrosion resistance.
Replacing the Airtac SI160 Standard Cylinder SI160AX850S with the SAI160AX850S
To replace the discontinued SI160AX850S, order the SAI160AX850S, confirming the ISO 15552 mounting interface, 850 mm stroke, G3/4 port, and mounting accessories. The -S magnet enables legacy CS1-B/DS1-B sensors, though the SAI family uses current AirTAC switches. Sizing both ways: this 160 mm bore yields 10053 N push at 0.5 MPa; dropping to a 125 mm bore gives 6136 N, while the next size up (200 mm) provides 15708 N. A plain cylinder does not hold load without live air—the cushion only decelerates—so use an external rod lock or pilot check valve for holding. Because the 850 mm stroke is long, add external guides to prevent rod bending and side-load wear. The SAIL lock or SAIF valve variants offer further functional upgrades if needed.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160AX850S
- ✓ 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 SI160AX850S FAQ
Yes, the AirTAC SI160AX850S is discontinued. The direct replacement is the SAI160AX850S. It is dimensionally interchangeable per ISO 15552, retaining the same 160 mm bore, 850 mm stroke, G3/4 port, and mounting interface, so it drops directly into existing fixtures.
This double-acting cylinder operates at 30-500 mm/s. It generates 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 18095 N at 0.9 MPa. The theoretical maximum force is 2050 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160AX850S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160AX850S replacement — usually within 7-8 hours.