This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X1450, 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 SI50X1450
The AirTAC Airtac SI50 Standard Cylinder SI50X1450 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 1450mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X1450, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke1450 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X1450
- 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 SI50X1450
The AirTAC SI50X1450 is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 1450mm stroke. Because 1450mm exceeds the 1200mm maximum standard stroke for this bore, it was produced as a non-standard made-to-order unit. It delivers 982N push and 825N pull at 0.5MPa, utilizing a G1/4 air port and a 30mm adjustable air cushion at each end. As this SKU lacks the -S magnet suffix, it cannot accept a magnetic position switch.
AirTAC replaced the SI line with the SAI50X1450, a direct upgrade retaining the exact ISO 15552 mounting interface, output force, and port size. The SAI features an upgraded piston seal with two Y-shaped one-way elements for lower start-up pressure and extended life. For applications needing load holding on air loss, the SAI family introduces SAIL and BSAI lock variants the SI lacked.
Airtac SI50 Standard Cylinder SI50X1450 Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X1450 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X1450 |
| Bore size | Ø50 mm |
| Stroke | 1450 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 SAI50X1450 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 SAI50X1450 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 SI50X1450
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×1450 | 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 SI50X1450 Is Used
Extended Transfer Push
Pushes products between distant conveyor lanes over a 1450mm span, utilizing the 982N thrust at 0.5MPa while relying on an external guide to prevent rod bending.
Vertical Material Lift
Raises light pallets or totes up to 50kg in a sorting hub, requiring a pilot check valve to hold the load safely when air pressure drops.
Long-Stroke Deflection
Actuates swinging gates or diverter arms across wide machinery beds, where the 30mm adjustable cushion decelerates the rod at stroke ends.
Replacing the Airtac SI50 Standard Cylinder SI50X1450 with the SAI50X1450
To replace the discontinued SI50X1450, order the SAI50X1450. Verify your existing fixture matches the ISO 15552 mounting interface, 50mm bore, 1450mm stroke, G1/4 port, and M16x1.5 rod thread. If you require position sensing, note this original SKU lacks a magnet and cannot take a sensor; specify an SAI50X1450S for the CS1-B/DS1-B legacy switch groove. Because 1450mm exceeds the 1200mm standard stroke limit, this is a made-to-order item. At 0.5MPa the 50mm bore yields 982N push; sizing down to a 40mm bore drops force to 628N, while sizing up to 63mm increases it to 1559N. A plain cylinder drifts on air loss—the cushion only decelerates—so for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. Finally, at 1450mm, prevent rod bending and side-load wear by using an external guide rail to support the load.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X1450
- ✓ 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 SI50X1450 FAQ
Yes, the SI50X1450 is discontinued. The direct replacement is the SAI50X1450. It is dimensionally interchangeable per ISO 15552, retaining the same 50mm bore, 1450mm stroke, G1/4 port, and mounting interface. The SAI simply upgrades the piston seal to two Y-shaped elements for lower start-up pressure and longer life.
The 50mm bore uses a G1/4 air port and a 20mm piston rod. Force output is 982N push and 825N pull at 0.5MPa, 1374N push at 0.7MPa, and 1767N push at 0.9MPa, with a theoretical maximum of 200kgf at 1.0MPa. Operating speed ranges from 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X1450
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X1450 replacement — usually within 7-8 hours.