This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50AX200, 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 SI50AX200
The AirTAC Airtac SI50 Standard Cylinder SI50AX200 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 200mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50AX200, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke200 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50AX200
- 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 SI50AX200
The AirTAC SI50AX200 is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore, 200mm stroke, and SUS420J2 stainless steel rod. It delivers 982N push force at 0.5MPa. The direct replacement is the SAI50AX200, retaining the exact G1/4 port, M16x1.5 thread, and ISO 15552 mounting interface.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure. Note this SKU lacks a magnet, so it cannot take a sensor.
Airtac SI50 Standard Cylinder SI50AX200 Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50AX200 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50AX200 |
| Bore size | Ø50 mm |
| Stroke | 200 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 SAI50AX200 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 SAI50AX200 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 SI50AX200
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×200 | 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 SI50AX200 Is Used
Stainless Rod Actuation
Leverages the SUS420J2 rod for corrosion-resistant pushing in washdown or mildly chemical manufacturing environments.
Mid-Force Diverting
Provides 982N of thrust at 0.5MPa to actuate routing gates and diverters on medium-duty packaging lines.
Replacing the Airtac SI50 Standard Cylinder SI50AX200 with the SAI50AX200
To replace the SI50AX200, order the SAI50AX200 to keep the identical ISO 15552 interface, 50mm bore, 200mm stroke, G1/4 port, and SUS420J2 rod. If scaling up, the 63mm bore yields 1559N at 0.5MPa; scaling down, the 40mm bore gives 628N. This non-magnet version cannot accept CS1-B/DS1-B switches. For load holding, remember the air cushion only decelerates; use a pilot check valve or SAIL lock variant to prevent drift.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50AX200
- ✓ 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 SI50AX200 FAQ
Yes, the SI50AX200 is discontinued. The direct replacement is the SAI50AX200. It is dimensionally interchangeable per ISO 15552, matching the 50mm bore, 200mm stroke, force, G1/4 port, and mounting fixtures.
It has a G1/4 air port. Force output is 982N push and 825N pull at 0.5MPa, 1374N push at 0.7MPa, 1767N push at 0.9MPa, and a theoretical max of 200kgf at 1.0MPa. Speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50AX200
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50AX200 replacement — usually within 7-8 hours.