This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ80X280-50, 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 SIJ80X280-50
The AirTAC SIJ80 Dual Axis Adjustable Cylinder SIJ80X280-50 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 280mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ80X280-50, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke280 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ80X280-50
- 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 SIJ80X280-50
The AirTAC SIJ80X280-50 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. Its external stop screw lets you trim the extend stroke by up to 50 mm on-site, yielding a usable 230-280 mm forward travel. It features a 25 mm rod, M20x1.5 thread, and a G3/8 port.
The direct replacement is the SAIJ80X280-50, preserving the ISO 15552 mounting interface, bore, force, and adjust window. The SAIJ upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure and longer life. Note: this SKU lacks a -S magnet and cannot accept a sensor.
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X280-50 Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X280-50 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X280-50 |
| Bore size | Ø80 mm |
| Stroke | 280 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 SAIJ80X280-50 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 SAIJ80X280-50 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 SIJ80X280-50
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×280 | 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 SIJ80X280-50 Is Used
Multi-Height Forming Press
Adjusts the 280 mm extend stroke down by 50 mm to accommodate varying material thicknesses without repositioning the entire ISO 15552 fixture.
Variable-Length Diverter
Tunes the actuator endpoint on-site to handle different package sizes on a packaging line, ensuring precise routing without swapping cylinders.
Tiered Pallet Stopper
Shortens the forward stroke to match different pallet heights, providing a hard mechanical stop for positioning while using the G3/8 port for supply.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X280-50 with the SAIJ80X280-50
To replace the discontinued SIJ80X280-50, order the direct replacement SAIJ80X280-50. Choose the 50 mm adjust window if your fixture needs on-site extend tuning from 230 to 280 mm. Mounting interchange is handled via ISO 15552 interface dimensions (FA, LB, TC). Because this SKU has no -S suffix, it cannot accept legacy CS1-B/DS1-B sensors. For strokes over 300 mm, verify side-load limits to prevent guide wear. The stop screw sets end position only; it is not a load lock, so use an external rod lock or pilot-operated check valve for held loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X280-50
- ✓ 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 SIJ80X280-50 FAQ
Yes, the SIJ80X280-50 is discontinued. The direct replacement is the SAIJ80X280-50, which shares the identical ISO 15552 interface, 80 mm bore, 280 mm stroke, 50 mm adjust window, and G3/8 port. The SAIJ family also adds 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 50 mm on-site (usable range 230-280 mm). The stop sets end position only; it is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ80X280-50
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ80X280-50 replacement — usually within 7-8 hours.