This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50AX160, 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 SI50AX160
The AirTAC SI50 Standard Cylinder SI50AX160 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 SAI50AX160, 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 → SAI50AX160
- 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 SI50AX160
The AirTAC SI50AX160 is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 160mm stroke. It delivers 982N push and 825N pull at 0.5MPa through a G1/4 port. The direct replacement is the SAI50AX160, which maintains the exact ISO 15552 mounting interface, bore, output force, and port size for existing fixtures.
This SKU features a SUS420J2 stainless piston rod for corrosion resistance but lacks a magnet, so it cannot accept CS1-B or DS1-B switches. The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure.
Airtac SI50 Standard Cylinder SI50AX160 Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50AX160 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50AX160 |
| 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 SAI50AX160 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 SAI50AX160 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 SI50AX160
| 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 SI50AX160 Is Used
Package Diverting
Actuates routing gates on packaging lines where the 982N push force at 0.5MPa easily overcomes carton friction.
Stainless Rod Clamping
Secures mild steel workpieces in machining cells using the SUS420J2 rod option to resist coolant corrosion.
Replacing the Airtac SI50 Standard Cylinder SI50AX160 with the SAI50AX160
To replace the SI50AX160, order the SAI50AX160 and verify your ISO 15552 mounting accessory (LB, FA, TC, etc.), 160mm stroke, and G1/4 port. This no-magnet SKU cannot support sensors; if position feedback is needed, select an SAI model with the -S suffix for current AirTAC switches. Sizing both ways: the 50mm bore yields 982N push at 0.5MPa, while the neighbouring 63mm bore offers 1559N. Note that a plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external pilot check valve or the SAIL/BSAI lock variants. The Viton H seal option raises operating temperature to 150C.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50AX160
- ✓ 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 SI50AX160 FAQ
Yes, the SI50AX160 is discontinued. The direct replacement is the SAI50AX160. It is dimensionally interchangeable per ISO 15552, retaining the same 50mm bore, 160mm stroke, G1/4 port, and mounting interface.
The G1/4 port feeds a 50mm bore that generates 982N push and 825N pull at 0.5MPa, 1374N push at 0.7MPa, and a theoretical maximum of 200kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50AX160
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50AX160 replacement — usually within 7-8 hours.