This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X150N, 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 SI50X150N
The AirTAC SI50 Standard Cylinder SI50X150N is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 150mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X150N, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke150 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X150N
- 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 SI50X150N
The AirTAC SI50X150N is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 150mm stroke. It delivers 982 N push and 825 N pull at 0.5 MPa through a G1/4 port. Because this SKU lacks a magnet, it cannot accept a position sensor. The NBR (-N) seals support temperatures from -20 to +70 C.
You must order the direct replacement SAI50X150N. It shares the exact ISO 15552 mounting interface, M16x1.5 rod thread, and force ratings. The SAI upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure.
Airtac SI50 Standard Cylinder SI50X150N Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X150N |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X150N |
| Bore size | Ø50 mm |
| Stroke | 150 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 SAI50X150N 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 SAI50X150N 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 SI50X150N
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×150 | 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 SI50X150N Is Used
Package Diverting
Pushes medium cartons off a main conveyor line using 982 N of thrust at 0.5 MPa, fitting cleanly into existing ISO 15552 profile mounts.
Clamp Actuation
Secures workpieces in machining fixtures; the 150mm stroke provides ample reach, while NBR seals handle standard shop temperatures.
Replacing the Airtac SI50 Standard Cylinder SI50X150N with the SAI50X150N
To replace the SI50X150N, order the SAI50X150N. Verify the ISO 15552 mounting accessory (LB, FA, TC, etc.), the G1/4 air port, and the 150mm stroke. This non-magnetic SKU cannot hold a switch; if sensing is needed, select an SAI50X150NS. Sizing both ways: a 40mm bore yields 628 N push at 0.5 MPa, while a 63mm bore yields 1559 N. 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. At 150mm stroke, side-load is minimal, but ensure rigid guidance for heavy loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X150N
- ✓ 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 SI50X150N FAQ
Yes, the AirTAC SI50X150N is discontinued. The direct replacement is the SAI50X150N. It shares the same ISO 15552 mounting interface, 50mm bore, 150mm stroke, G1/4 port, and output force, fitting existing fixtures perfectly.
The 50mm bore uses a G1/4 air port and a 20mm rod. Force ratings are: 982 N push and 825 N pull at 0.5 MPa; 1374 N push at 0.7 MPa; 1767 N push at 0.9 MPa; with a theoretical max of 200 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X150N
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X150N replacement — usually within 7-8 hours.