This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ80X50-20, 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 SIJ80 Dual Axis Adjustable Cylinder SIJ80X50-20
The AirTAC SIJ80 Dual Axis Adjustable Cylinder SIJ80X50-20 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 50mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ80X50-20, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke50 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ80X50-20
- 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 SIJ80 Dual Axis Adjustable Cylinder SIJ80X50-20
The AirTAC SIJ80X50-20 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. An external stop screw lets you trim the extend stroke by up to 20 mm on-site, giving a usable 30-50 mm window from the 50 mm nominal maximum. As this SKU lacks a -S suffix, it has no magnet and cannot accept a reed switch.
The direct replacement is the SAIJ80X50-20, retaining the exact ISO 15552 mounting interface, M20x1.5 rod thread, and 36 mm adjustable cushions. The SAIJ upgrade utilizes a two Y-shaped one-way piston seal for lower start-up pressure and longer life. Remember 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 SIJ80 Dual Axis Adjustable Cylinder SIJ80X50-20 Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X50-20 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X50-20 |
| Bore size | Ø80 mm |
| Stroke | 50 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| 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, 36 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAIJ80X50-20 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
The SAIJ80X50-20 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X50-20
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×50 | 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 SIJ80 Dual Axis Adjustable Cylinder SIJ80X50-20 Is Used
Press Fit Tuning
Light-duty press operations needing exact bottoming position adjusted on-site within the 30-50 mm extend window without swapping cylinders.
Diverter Gate Stroke
Calibrating a diverter gate endpoint by up to 20 mm on-site to accommodate varying package profiles on a packaging line.
Tooling Positioning
Fine-tuning the extend stop for multi-format tooling fixtures where the exact extend endpoint must be dialed in during machine commissioning.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X50-20 with the SAIJ80X50-20
To replace the discontinued SIJ80X50-20, order the direct replacement SAIJ80X50-20, which preserves the 50 mm nominal stroke, 20 mm adjust window, and G3/8 port. Choose the 20 mm adjust window when you need precise field tuning of the extend endpoint. Mounting options include FA, LB, and TC brackets. Because this unit lacks the -S magnet, it cannot support legacy CS1-B/DS1-B sensors. For strokes at or above 300 mm, verify your side-load limits to prevent guide failure.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X50-20
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X50-20 FAQ
Yes, the SIJ80X50-20 is discontinued. The direct replacement is the SAIJ80X50-20. It shares the identical ISO 15552 interface, 80 mm bore, 50 mm stroke, 20 mm adjust window, and G3/8 port, but features an upgraded two Y-shaped one-way piston seal for longer life.
The external stop screw allows you to trim the extend stroke by up to 20 mm on-site, yielding a usable 30-50 mm stroke. The stop sets end position only and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ80X50-20
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ80X50-20 replacement — usually within 7-8 hours.