This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X160S, 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 SI50 Standard Cylinder SI50X160S
The AirTAC Airtac SI50 Standard Cylinder SI50X160S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 160mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X160S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke160 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X160S
- 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 SI50 Standard Cylinder SI50X160S
The AirTAC SI50X160S is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 160mm stroke, delivering 982N push force at 0.5MPa through a G1/4 port. AirTAC replaced this legacy unit with the SAI50X160S, a direct upgrade retaining the exact ISO 15552 mounting interface, bore, stroke, output force, and port size.
The SAI replacement introduces an upgraded piston seal featuring two Y-shaped one-way elements for low start-up pressure and extended life. This SI50X160S variant includes a piston magnet for legacy CS1-B/DS1-B sensors, while the SAI family also adds SAIL, SAIF, and BSAI lock or valve variants.
Airtac SI50 Standard Cylinder SI50X160S Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X160S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X160S |
| Bore size | Ø50 mm |
| Stroke | 160 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M16×1.5 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI50X160S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
The SAI50X160S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI50 Standard Cylinder SI50X160S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×160 | 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 SI50 Standard Cylinder SI50X160S Is Used
Package Diversion
Actuates routing gates on packaging lines where 982N push force reliably redirects moderate-weight cartons at speed.
Clamp Actuation
Provides secure holding pressure for mid-sized machining fixtures, utilizing the 825N pull force at 0.5MPa.
Replacing the Airtac SI50 Standard Cylinder SI50X160S with the SAI50X160S
To replace the SI50X160S, order the SAI50X160S and confirm your ISO 15552 mounting interface, 50mm bore, 160mm stroke, G1/4 port (PT/G/NPT thread), and mounting accessory. Because this SKU includes the -S magnet, it supports CS1-B/DS1-B switches; a no-S cylinder cannot take a sensor. If you need more force, the neighboring 63mm bore yields 1559N at 0.5MPa; if less is required, the 40mm bore provides 628N. A plain cylinder does not hold load without live air, as the cushion only decelerates; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. At 160mm stroke, side-load and rod-bending risks are minimal, but always guide the load to prevent binding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X160S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI50 Standard Cylinder SI50X160S FAQ
Yes, the SI50X160S is discontinued. The direct replacement is the SAI50X160S. It features the same ISO 15552 mounting interface, 50mm bore, 160mm stroke, output force, and G1/4 port, fitting existing fixtures perfectly without modifications.
The 50mm bore features a G1/4 air port. The thrust ratings are 982N push and 825N pull at 0.5MPa, 1374N push at 0.7MPa, 1767N push at 0.9MPa, and a theoretical maximum of 200kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X160S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X160S replacement — usually within 7-8 hours.