This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ80X80-50S, 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 SIJ80X80-50S
The AirTAC SIJ80 Dual Axis Adjustable Cylinder SIJ80X80-50S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 80mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ80X80-50S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke80 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ80X80-50S
- 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 SIJ80X80-50S
The AirTAC SIJ80X80-50S 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 50 mm on-site, giving a usable extend range of 30-80 mm (the 80 mm nominal is the maximum). The 80 mm bore uses a G3/8 port, a Ø25 mm rod, M20x1.5 thread, and 36 mm adjustable cushions.
The direct replacement is the SAIJ80X80-50S, preserving the ISO 15552 mounting interface, bore, stroke, and force. The SAIJ upgrade introduces a two-piece Y-shaped piston seal for lower start-up pressure and longer life. The -S suffix denotes a built-in piston magnet for legacy CS1-B/DS1-B sensors.
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X80-50S Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X80-50S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X80-50S |
| Bore size | Ø80 mm |
| Stroke | 80 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 SAIJ80X80-50S 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 SAIJ80X80-50S 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 SIJ80X80-50S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | 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 SIJ80 Dual Axis Adjustable Cylinder SIJ80X80-50S Is Used
Variable Depth Forming
Stamping or pressing applications where the extend stroke must be fine-tuned on-site to accommodate different material thicknesses without changing the entire actuator.
Adjustable Transfer Stops
Diverting or halting products of varying sizes on a line, utilizing the 50 mm extend trim window to reposition the stop face quickly between production runs.
Tunable Push-off Pins
Ejecting parts from a fixture with a precise extend endpoint, allowing operators to shorten the stroke from 80 mm down to 30 mm to match specific part geometries.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X80-50S with the SAIJ80X80-50S
To replace the discontinued SIJ80X80-50S, order the direct replacement SAIJ80X80-50S; it keeps the exact ISO 15552 dimensions, G3/8 port, and 50 mm adjust window. Choose the 50 mm adjust window if your end-position tuning requires trimming the 80 mm nominal extend down to a 30 mm minimum. Mounting choices include Basic, FA, LB, and TC. The -S suffix provides a piston magnet for switch sensing. Because the external stop sets end position but is not a lock, a plain cylinder drifts on air loss; for held loads use an external rod lock or the SAIL/BSAI variant. For strokes >=300 mm, confirm side-load guidance to prevent rod binding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X80-50S
- ✓ 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 SIJ80X80-50S FAQ
Yes, the SIJ80X80-50S is discontinued. The direct replacement is the SAIJ80X80-50S. It shares the same ISO 15552 interface, 80 mm bore, 80 mm stroke, 50 mm adjust window, G3/8 port, and mounting options, while upgrading to a two-piece Y-shaped piston seal for longer life.
The external stop screw provides a 50 mm adjustment window, allowing the 80 mm extend stroke to be shortened to a 30 mm minimum on-site. The stop sets end position and is not a load lock; use an external rod lock or SAIL/BSAI variant for load holding.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ80X80-50S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ80X80-50S replacement — usually within 7-8 hours.