This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X1520, 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 SI50X1520
The AirTAC Airtac SI50 Standard Cylinder SI50X1520 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 1520mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X1520, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke1520 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X1520
- 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 SI50X1520
The AirTAC SI50X1520 is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 1520mm stroke. Because 1520mm exceeds the 1200mm maximum standard stroke for this bore, it is a non-standard, made-to-order unit. It delivered 982N push force at 0.5MPa through a G1/4 port. The direct replacement is the SAI50X1520, sharing the same interface, force, and mounting.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. Note this SKU lacks the -S magnet, so it cannot take CS1-B/DS1-B sensors. For high heat, Viton H seals raise the temperature range to 0-150C.
Airtac SI50 Standard Cylinder SI50X1520 Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X1520 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X1520 |
| Bore size | Ø50 mm |
| Stroke | 1520 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 SAI50X1520 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 SAI50X1520 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 SI50X1520
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×1520 | 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 SI50X1520 Is Used
Long-Reach Pusher
Transfers products across wide conveyor belts using the full 1520mm extension, requiring external guide rails to prevent rod bending.
Pallet Rejection
Exerts 982N push at 0.5MPa to divert heavy pallets or totes at sorting stations, sized safely for a 589N working load.
Extended Lowering Lift
Lowers fixtures over a 1.5-meter vertical drop, relying on a pilot-operated check valve to hold the load when air is removed.
Replacing the Airtac SI50 Standard Cylinder SI50X1520 with the SAI50X1520
To replace the SI50X1520, order the SAI50X1520. Confirm the ISO 15552 mounting accessory (LB, FA, TC, etc.), the G1/4 port, and the M16x1.5 rod thread. This non-standard 1520mm stroke requires external guides to prevent rod bending and side-load damage. For sizing both ways: a 40mm bore gives 628N push at 0.5MPa, while a 63mm bore gives 1559N. This plain cylinder does not hold load without live air; the 30mm adjustable cushion only decelerates. For load holding, use an external pilot check valve or the SAIL/BSAI lock variants. Since this is a no-S SKU, it cannot accept position sensors.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X1520
- ✓ 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 SI50X1520 FAQ
Yes, the SI50X1520 is discontinued. The direct replacement is the SAI50X1520. It is dimensionally interchangeable per ISO 15552, keeping the same 50mm bore, 1520mm stroke, G1/4 port, and mounting fixtures.
This double-acting cylinder uses a G1/4 air 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. Operating speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X1520
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X1520 replacement — usually within 7-8 hours.