This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X1300, 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 SI50X1300
The AirTAC Airtac SI50 Standard Cylinder SI50X1300 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 SAI50X1300, 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 → SAI50X1300
- 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 SI50X1300
The AirTAC SI50X1300 is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 1300mm stroke. Because 1300mm exceeds the 1200mm standard maximum for this bore, it is a non-standard, made-to-order unit. It delivers 982N push force at 0.5MPa via a G1/4 port. AirTAC replaced the SI line with the SAI family, making the SAI50X1300 the direct replacement. It shares the same ISO 15552 mounting interface, bore, stroke, force, port and accessories, dropping directly into existing fixtures.
The SAI upgrade features a new piston seal using two Y-shaped one-way elements for long life and low start-up pressure. Note this SKU lacks a magnet (-S) and cannot accept a CS1-B/DS1-B sensor. For high-temperature environments, a Viton H seal option raises the operating limit to 150C.
Airtac SI50 Standard Cylinder SI50X1300 Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X1300 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X1300 |
| 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 SAI50X1300 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 SAI50X1300 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 SI50X1300
| 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 SI50X1300 Is Used
Long-Reach Diversion
Drives extended-stroke diverters on packaging lines where the 50mm bore provides ample 982N push force to pivot heavy goods over a 1300mm travel distance.
High-Bay Pusher
Acts as a horizontal pusher in automated storage systems, utilizing the 1300mm stroke to transfer palletized loads between aisles at speeds up to 800mm/s.
Replacing the Airtac SI50 Standard Cylinder SI50X1300 with the SAI50X1300
To replace the SI50X1300, order the SAI50X1300. Verify your ISO 15552 mounting interface (LB, FA, TC, etc.), the G1/4 air port, and the M16x1.5 rod thread. Because this 1300mm stroke exceeds the 1200mm standard maximum, expect a made-to-order lead time. At 0.5MPa the 50mm bore yields 982N push and 825N pull; if you need less force, the 40mm bore provides 628N push, while the 63mm bore offers 1559N push for heavier loads. A plain cylinder does not hold load on air loss—the cushion only decelerates. For load holding, use an external rod lock, a pilot check valve, or the SAIL/BSAI lock variant. Finally, this SKU has no magnet and cannot take a sensor; order an SAI with the S suffix if position sensing is required. Due to the long 1300mm stroke, use external guides to prevent rod bending and side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X1300
- ✓ 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 SI50X1300 FAQ
Yes, the AirTAC SI50X1300 is discontinued. The direct replacement is the SAI50X1300. It is dimensionally interchangeable per ISO 15552, retaining the same 50mm bore, 1300mm stroke, G1/4 port, and mounting interface.
This double-acting cylinder uses a G1/4 port and features a 20mm rod with an M16x1.5 thread. It generates 982N push and 825N pull at 0.5MPa, 1374N push at 0.7MPa, 1767N push at 0.9MPa, and a theoretical maximum of 200kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X1300
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X1300 replacement — usually within 7-8 hours.