This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ80X50-20S, 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 SIJ80X50-20S
The AirTAC SIJ80 Dual Axis Adjustable Cylinder SIJ80X50-20S 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 SAIJ80X50-20S, 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 → SAIJ80X50-20S
- 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 SIJ80X50-20S
The AirTAC SIJ80X50-20S is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 50 mm nominal stroke. An external stop screw allows you to trim the extend stroke by up to 20 mm on-site, yielding a usable 30-50 mm extension. The direct replacement is the SAIJ80X50-20S, retaining the G3/8 port, M20x1.5 rod thread, and 36 mm adjustable cushions.
The SAIJ upgrade utilizes an upgraded two Y-shaped one-way piston seal for lower start-up pressure and longer life. The stop screw sets the end position and is not a load lock; use SAIL or BSAI for held loads.
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X50-20S Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X50-20S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X50-20S |
| 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 SAIJ80X50-20S 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 SAIJ80X50-20S 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 SIJ80X50-20S
| 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 SIJ80X50-20S Is Used
Variable Stroke Clamping
Allows operators to fine-tune the extend position by up to 20 mm on-site to accommodate different workpiece thicknesses without changing the entire actuator setup.
Adjustable Transfer Pusher
Provides a 30-50 mm extend stroke to push varying product sizes off a line, using the external stop to set precise ejection distances.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X50-20S with the SAIJ80X50-20S
To replace the discontinued SIJ80X50-20S, order the direct replacement SAIJ80X50-20S, keeping the 50 mm max stroke, 20 mm adjust window, and -S piston magnet for legacy CS1-B/DS1-B switches. Select the 20 mm adjust window if your field tuning only requires trimming the extend by up to 20 mm. Mounting options include FA, LB, and TC brackets. Because the 50 mm stroke is under 300 mm, side-load rod deflection is minimal. For load holding without live air, select an external rod lock or the SAIL variant, as the stop screw is not a brake.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X50-20S
- ✓ 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 SIJ80X50-20S FAQ
Yes, the SIJ80X50-20S is discontinued. The direct replacement is the SAIJ80X50-20S, which shares the identical ISO 15552 interface, 80 mm bore, 50 mm stroke, 20 mm adjust window, G3/8 port, and mounting options.
The nominal 50 mm extend stroke can be shortened by up to 20 mm on-site via the external stop screw, yielding a 30-50 mm usable stroke. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ80X50-20S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ80X50-20S replacement — usually within 7-8 hours.