This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X410, 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 SI50X410
The AirTAC Airtac SI50 Standard Cylinder SI50X410 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 410mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X410, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke410 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X410
- 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 SI50X410
The AirTAC SI50X410 is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 410mm stroke. It delivers 982N push force at 0.5MPa via a G1/4 port. The direct replacement is the SAI50X410, matching the exact interface, force, and mounting.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. For sensing, this non-S SKU lacks a magnet and cannot take a switch.
Airtac SI50 Standard Cylinder SI50X410 Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X410 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X410 |
| Bore size | Ø50 mm |
| Stroke | 410 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 SAI50X410 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 SAI50X410 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 SI50X410
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×410 | 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 SI50X410 Is Used
Carton Diverting
Pushes packages laterally on a sorting line using the 410mm stroke and 982N force at 0.5MPa.
Pallet Handling
Extends to position pallets at a wrapping station, requiring external guides to manage the long rod.
Replacing the Airtac SI50 Standard Cylinder SI50X410 with the SAI50X410
To replace the SI50X410, order the SAI50X410. Verify the ISO 15552 mounting interface, 50mm bore, 410mm stroke, G1/4 port (PT/G/NPT thread), and your mounting accessory. This non-magnet SKU cannot accept a sensor; if you need position detection, select an SAI50X410S. For sizing, a 40mm bore yields 628N push at 0.5MPa, while a 63mm bore yields 1559N. At 410mm stroke, use external guides to prevent rod bending and side-load wear. The cushion only decelerates; for load holding on air loss, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X410
- ✓ 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 SI50X410 FAQ
Yes, the SI50X410 is discontinued. The direct replacement is the SAI50X410. It is dimensionally interchangeable per ISO 15552, retaining the same 50mm bore, 410mm stroke, port, and mounting.
It has a G1/4 port. The force ratings are: 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.
Request a Quote for the SAI50X410
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X410 replacement — usually within 7-8 hours.