This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ50X80-100, 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 SIJ50 Double Rod Adjustable Cylinder SIJ50X80-100
The AirTAC SIJ50 Double Rod Adjustable Cylinder SIJ50X80-100 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 80mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ50X80-100, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke80 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAIJ50X80-100
- 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 SIJ50 Double Rod Adjustable Cylinder SIJ50X80-100
The AirTAC SIJ50X80-100 is a discontinued double-acting, double-rod ISO 15552 adjustable-stroke cylinder with a 50 mm bore and 80 mm maximum extend stroke. An external stop screw lets you trim the extend stroke by up to 100 mm on-site, yielding a usable 0-80 mm end position. As the SIJ line is end-of-life, the direct replacement is the SAIJ50X80-100—matching the interface, bore, force, and mounting.
The SAIJ upgrade retains the ISO 15552 mounting footprint while incorporating an upgraded two-piece Y-shaped piston seal for lower start-up pressure and longer life. Note this SKU lacks a -S magnet and cannot accept a sensor. The stop screw sets end position only; it is not a load lock, so use an external rod lock or SAIL/BSAI variant for held loads.
Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X80-100 Technical Specifications
| Model | Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X80-100 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ50X80-100 |
| Bore size | Ø50 mm |
| Stroke | 80 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 SAIJ50X80-100 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 SAIJ50X80-100 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X80-100
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×80 | 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 SIJ50 Double Rod Adjustable Cylinder SIJ50X80-100 Is Used
Custom Press Fitments
Dialing in exact contact travel on small pneumatic presses where the 100 mm adjust window allows operators to fine-tune the 80 mm extend stroke on-site for varying material thicknesses.
Variable-Length Diverters
Actuating routing gates on packaging lines where the external stop screw quickly modifies the extend endpoint to handle changing package dimensions without swapping cylinders.
Adjustable Stops
Positioning lightweight pallet stops where the 50 kg vertical lift capacity at 0.5 MPa is sufficient, and the adjustable end position accommodates different pallet geometries.
Replacing the Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X80-100 with the SAIJ50X80-100
To replace the discontinued SIJ50X80-100, order the direct replacement SAIJ50X80-100, reusing your existing FA, LB, or TC ISO 15552 mounts. Choose the 100 mm adjust window when you need aggressive on-site stroke trimming down from the 80 mm nominal maximum. Because this SKU has no -S magnet, it cannot support legacy CS1-B/DS1-B sensors; add external physical stops or switches if detection is required. For strokes of 300 mm or longer, carefully manage side-load moments to prevent rod binding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ50X80-100
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X80-100 FAQ
Yes, the SIJ50X80-100 is discontinued. The direct replacement is the SAIJ50X80-100, which shares the identical ISO 15552 interface, 50 mm bore, 80 mm stroke, 100 mm adjust window, G1/4 port, and mounting options. The SAIJ family also features an upgraded piston seal for longer life.
The external stop screw provides a 100 mm adjustment window, allowing you to shorten the 80 mm nominal extend stroke down to 0 mm on-site. The stop sets end position only and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ50X80-100
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ50X80-100 replacement — usually within 7-8 hours.