This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ80X250-30, 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 SIJ80X250-30
The AirTAC SIJ80 Dual Axis Adjustable Cylinder SIJ80X250-30 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 250mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ80X250-30, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke250 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ80X250-30
- 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 SIJ80X250-30
The AirTAC SIJ80X250-30 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with an 80 mm bore, 250 mm maximum stroke, and a 30 mm external stop-screw window. This allows you to trim the extend stroke on-site down to 220 mm. The bore dictates a G3/8 port, a 25 mm piston rod, and 36 mm adjustable air cushions. Because SIJ is end-of-life, the direct replacement is the SAIJ80X250-30, which preserves the ISO 15552 mounting interface, bore, force, and adjust window.
The SAIJ upgrade incorporates a two Y-shaped one-way piston seal for lower start-up pressure and longer life. Remember the stop screw sets the end position but is not a load lock; use an external rod lock or pilot-operated check valve for held loads.
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X250-30 Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X250-30 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X250-30 |
| Bore size | Ø80 mm |
| Stroke | 250 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 SAIJ80X250-30 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 SAIJ80X250-30 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 SIJ80X250-30
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×250 | 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 SIJ80X250-30 Is Used
Press Fit Tuning
Trimming the extend stroke by up to 30 mm on-site lets operators set precise press-fit depths for bearings without changing the entire actuator.
Variable Length Diverter
Adjusting the extend stop from 220 to 250 mm accommodates changing package sizes on a sorting line without repositioning the cylinder mount.
Pallet Stop Calibration
Fine-tuning the end position provides a calibrated mechanical stop for pallets of varying widths, ensuring consistent placement before wrapping.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X250-30 with the SAIJ80X250-30
To replace the discontinued SIJ80X250-30, order the direct replacement SAIJ80X250-30, keeping the same 30 mm adjust window and 250 mm nominal stroke. Reuse your existing FA, LB, or TC ISO 15552 mounts. This SKU lacks the -S magnet, so it cannot accept a magnetic switch; add external sensors if needed. For strokes of 300 mm or longer, verify side-load guidance to prevent rod distortion. The 30 mm adjust window is ideal for fine-tuning the extend endpoint without machining spacers.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X250-30
- ✓ 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 SIJ80X250-30 FAQ
Yes, the SIJ80X250-30 is discontinued. The direct replacement is the SAIJ80X250-30. It shares the same ISO 15552 interface, 80 mm bore, 250 mm stroke, 30 mm adjust window, G3/8 port, and mounting options, while adding an upgraded piston seal.
The external stop screw offers a 30 mm adjust window, allowing the extend stroke to be shortened from the 250 mm maximum down to 220 mm. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ80X250-30
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ80X250-30 replacement — usually within 7-8 hours.