This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160X50SN, 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 SI160X50SN
The AirTAC SI160 Standard Cylinder SI160X50SN is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 50mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI160X50SN, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke50 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI160X50SN
- 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 SI160X50SN
The AirTAC SI160X50SN is a discontinued double-acting ISO 15552 profile cylinder with a 160mm bore and 50mm stroke. Delivering 10053N push force at 0.5MPa via a G3/4 port, it is replaced by the SAI160X50SN. This direct successor matches the exact ISO 15552 mounting interface, bore, stroke, output force, and accessories. The SAI upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure and longer life. The -S magnet works with legacy CS1-B/DS1-B sensors, while the -N NBR seal supports -20 to +70C (Viton H raises this to 150C).
The SAI family also adds SAIL (air-released lock) and BSAI (clamp-lock) variants the SI line lacked. A plain cylinder drifts without live air; the cushion only decelerates near stroke end, so use a lock variant or pilot check valve for load holding.
Airtac SI160 Standard Cylinder SI160X50SN Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160X50SN |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160X50SN |
| Bore size | Ø160 mm |
| Stroke | 50 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 SAI160X50SN 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 SAI160X50SN 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 SI160X50SN
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×50 | 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 SI160X50SN Is Used
Heavy Press Operations
Drives 10053N of push force at 0.5MPa for high-tonnage forming, stamping, and pressing tasks in metal fabrication.
Clamp and Hold Fixtures
Secures large workpieces during machining, though an external rod lock or SAIL variant is required if air pressure fails.
Replacing the Airtac SI160 Standard Cylinder SI160X50SN with the SAI160X50SN
To replace the SI160X50SN, order the SAI160X50SN direct. Confirm the ISO 15552 mounting interface, 160mm bore, 50mm stroke, G3/4 port (PT/G/NPT thread), M36x2 rod thread, and your specific mounting accessory. The -S magnet enables CS1-B/DS1-B sensors, and the -N denotes the NBR seal. When sizing both ways, compare neighbouring bores (125mm or 200mm) against the 10053N push force at 0.5MPa. Because this cylinder does not hold load on air loss, specify the SAIL lock or BSAI clamp-lock variant, or an external pilot check valve for vertical loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160X50SN
- ✓ 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 SI160X50SN FAQ
Yes, the SI160X50SN is discontinued. The direct replacement is the SAI160X50SN. It shares the same ISO 15552 mounting interface, 160mm bore, 50mm stroke, output force, G3/4 port, and accessories, fitting directly into existing fixtures.
The 160mm bore delivers 10053N push and 9425N pull at 0.5MPa, 14074N push at 0.7MPa, and a theoretical max of 2050kgf at 1.0MPa. Operating speed is 30-500mm/s, with a 50mm adjustable air cushion at both ends.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160X50SN
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160X50SN replacement — usually within 7-8 hours.