This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ80X250-50, 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 SIJ80X250-50
The AirTAC SIJ80 Dual Axis Adjustable Cylinder SIJ80X250-50 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 SAIJ80X250-50, 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 → SAIJ80X250-50
- 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 SIJ80X250-50
The AirTAC SIJ80X250-50 is a double-acting double-rod ISO 15552 adjustable-stroke cylinder, now discontinued and superseded by the SAIJ80X250-50. An external stop screw lets you trim the extend stroke by up to 50 mm on-site, yielding a usable 200-250 mm extension out of the 250 mm nominal maximum. The Ø80 mm bore features a G3/8 port, M20x1.5 rod thread, and 36 mm adjustable air cushions.
The SAIJ direct replacement reuses the exact ISO 15552 mounting interface and adds an upgraded two-piece Y-shaped piston seal for lower start-up pressure and longer life. Note this SKU lacks a magnet (-S) so it cannot accept legacy CS1-B/DS1-B sensors. The stop screw sets end position but is not a lock; loads will drift on air loss, so use an external rod lock or SAIL/BSAI variant for holding.
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X250-50 Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X250-50 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X250-50 |
| 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 SAIJ80X250-50 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 SAIJ80X250-50 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 SIJ80X250-50
| 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 SIJ80X250-50 Is Used
Variable Press Stroke
Adjusting the extend stroke on-site by up to 50 mm allows a press to accommodate varying material thicknesses without changing the entire cylinder setup.
Adjustable Diverter Arm
Tuning the extend stop from 200 to 250 mm lets operators reposition a sorting diverter on the fly to handle different package sizes on the line.
Variable Depth Palletizing
Trimming the extend stroke on-site ensures a gripper reaches varying pallet depths accurately, preventing over-travel during stacking operations.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X250-50 with the SAIJ80X250-50
To replace the discontinued SIJ80X250-50, order the SAIJ80X250-50 direct, preserving the 250 mm stroke, 50 mm adjust window, G3/8 port, and FA/LB/TC mountings. Choose the 50 mm adjust window when you need precise 200-250 mm extend tuning. Because this SKU has no -S magnet, magnetic sensing is impossible. For strokes of 300 mm or longer, verify side-load limits to prevent guide failure. The external stop only sets the end position; it does not lock, so add a pilot-operated check valve for load holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X250-50
- ✓ 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 SIJ80X250-50 FAQ
Yes, the SIJ80X250-50 is discontinued. The direct replacement is the SAIJ80X250-50, which matches the ISO 15552 interface, 80 mm bore, 250 mm stroke, 50 mm adjust window, G3/8 port, and mounting options, while adding an upgraded piston seal.
The external stop screw window is 50 mm, allowing you to trim the extend stroke from 250 mm down to 200 mm on-site. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ80X250-50
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ80X250-50 replacement — usually within 7-8 hours.