This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X1300S, 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 SI50X1300S
The AirTAC SI50 Standard Cylinder SI50X1300S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 1300mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X1300S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke1300 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X1300S
- 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 SI50X1300S
The AirTAC SI50X1300S is a discontinued double-acting ISO 15552 profile cylinder featuring a 50mm bore, 1300mm stroke, and a built-in piston magnet for CS1-B/DS1-B switches. It delivers 982N push force at 0.5MPa and uses a G1/4 air port. Because 1300mm exceeds the 1200mm standard maximum for this bore, it is a non-standard, made-to-order length.
You must order the direct replacement SAI50X1300S to maintain existing fixtures. It shares the exact ISO 15552 mounting interface, bore, stroke, force, and port. The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life.
Airtac SI50 Standard Cylinder SI50X1300S Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X1300S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X1300S |
| Bore size | Ø50 mm |
| Stroke | 1300 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 SAI50X1300S 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 SAI50X1300S 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 SI50X1300S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×1300 | 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 SI50X1300S Is Used
Long-Reach Diversion
Actuates diverter gates over wide conveyor belts where the 1300mm extension is required to push products cleanly into packing lanes.
High-Bay Extraction
Extracts totes from deep storage shelving, utilizing the 982N push force to overcome friction on long-stroke withdrawal.
Material Lowering
Feeds components down into assembly chutes, requiring an external guide to manage the side-load risks of the 1300mm rod.
Replacing the Airtac SI50 Standard Cylinder SI50X1300S with the SAI50X1300S
To replace this SI50X1300S, order the SAI50X1300S, confirming the ISO 15552 mounting interface, 50mm bore, 1300mm non-standard stroke, G1/4 port, and your mounting accessory. Because this is a 1300mm stroke exceeding the 1200mm standard, add an external guide to prevent rod-bending and side-load damage. Sizing both ways: the 63mm neighbor bore yields 1559N push at 0.5MPa, while dropping to a 40mm bore gives 628N. A plain cylinder drifts on air loss—the cushion only decelerates—so for load holding use an external pilot check valve or the SAIL/BSAI lock variants. The SAI family also adds the SAIF self-valve option the SI lacked.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X1300S
- ✓ 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 SI50X1300S FAQ
Yes, the SI50X1300S is discontinued. The direct replacement is the SAI50X1300S. It is dimensionally interchangeable per the ISO 15552 mounting interface, retaining the same 50mm bore, 1300mm stroke, G1/4 port, and output force.
The G1/4 port bore delivers a push force of 982N and pull of 825N at 0.5MPa, 1374N push at 0.7MPa, and a theoretical max of 200kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X1300S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X1300S replacement — usually within 7-8 hours.