This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X160N, 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 SI50X160N
The AirTAC SI50 Standard Cylinder SI50X160N 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 SAI50X160N, 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 → SAI50X160N
- 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 SI50X160N
The AirTAC SI50X160N is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 160mm stroke. It delivers a push force of 982 N and pull of 825 N at 0.5 MPa, operating through a G1/4 port. The direct replacement is the SAI50X160N, sharing the same interface, bore, stroke, force and mounting.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. This NBR-sealed unit runs -20 to +70 C, but lacks a magnet (-N) so it cannot take a sensor; use Viton H for up to 150 C.
Airtac SI50 Standard Cylinder SI50X160N Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X160N |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X160N |
| 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 SAI50X160N 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 SAI50X160N 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 SI50X160N
| 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 SI50X160N Is Used
Package Diverting
Pushes cartons at 30-800 mm/s on packaging lines using the 982 N push force to redirect items without stalling.
Clamp Actuation
Holds workpieces securely in machining fixtures, providing 825 N pull force for reliable tooling positioning.
Gate Control
Operates lightweight access gates and material stops, benefiting from the 30 mm adjustable air cushions at both ends.
Replacing the Airtac SI50 Standard Cylinder SI50X160N with the SAI50X160N
To replace the SI50X160N, order the SAI50X160N and confirm the ISO 15552 mounting interface, 50mm bore, 160mm stroke, G1/4 port (PT/G/NPT) and your mounting accessory. This non-magnetic SKU cannot accept a CS1-B/DS1-B sensor. Sizing both ways: a 40mm bore yields 628 N push at 0.5 MPa, while a 63mm bore yields 1559 N. For loads needing holding on air loss, the cushion only decelerates; use an external pilot check valve or the SAIL/BSAI lock variants. At 160mm stroke, guide external rods to prevent side-load bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X160N
- ✓ 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 SI50X160N FAQ
Yes, the SI50X160N is discontinued. The direct replacement is the SAI50X160N. It is dimensionally interchangeable per ISO 15552, retaining the same 50mm bore, 160mm stroke, 982 N force, G1/4 port and mounting interface.
The G1/4 port bore delivers a push of 982 N and pull of 825 N at 0.5 MPa. At 0.7 MPa push is 1374 N, and at 0.9 MPa it is 1767 N. The theoretical maximum force is 200 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X160N
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X160N replacement — usually within 7-8 hours.