This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ80X450-75, 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 SIJ80X450-75
The AirTAC SIJ80 Dual Axis Adjustable Cylinder SIJ80X450-75 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 450mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ80X450-75, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke450 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ80X450-75
- 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 SIJ80X450-75
The AirTAC SIJ80X450-75 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 450 mm nominal stroke and a G3/8 port. An external stop screw lets you trim the extend stroke by up to 75 mm on-site, yielding a usable 375-450 mm window. The direct replacement is the SAIJ80X450-75, matching the interface, force, and adjust window.
The SAIJ upgrade introduces a two-piece Y-shaped one-way piston seal for lower start-up pressure and longer life. Note this SKU lacks a magnet (-S) and cannot take a switch. The stop screw sets end position only; it is not a load lock, so use an external rod lock or SAIL/BSAI variant for held loads.
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X450-75 Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X450-75 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X450-75 |
| Bore size | Ø80 mm |
| Stroke | 450 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 SAIJ80X450-75 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 SAIJ80X450-75 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 SIJ80X450-75
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×450 | 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 SIJ80X450-75 Is Used
Variable-Length Pressing
Adjusting the extend stop on-site allows a press to hit varying material thicknesses between 375 and 450 mm without re-mounting the cylinder.
Adjustable Transfer Diverter
Tuning the extend stroke by up to 75 mm lets a diverter arm accommodate different package widths on a packaging line.
Multi-Depth Pallet Stop
An external stop screw sets the exact end position for different pallet depths, providing field flexibility for warehouse logistics.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X450-75 with the SAIJ80X450-75
To replace the discontinued SIJ80X450-75, map directly to the SAIJ80X450-75, retaining the M20x1.5 rod thread, G3/8 port, and 36 mm cushions. Choose the 75 mm adjust window if your extend stroke needs on-site tuning between 375-450 mm. Mounting reuses ISO 15552 FA, LB, or TC brackets. Because this SKU lacks the -S magnet, it cannot accept legacy CS1-B/DS1-B sensors. Finally, at 450 mm stroke, mind side-load and rod-bending forces—ensure external guides support the load.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X450-75
- ✓ 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 SIJ80X450-75 FAQ
Yes, the SIJ80X450-75 is discontinued. The direct replacement is the SAIJ80X450-75, which shares the same ISO 15552 interface, 80 mm bore, 450 mm stroke, 75 mm adjust window, and G3/8 port.
The external stop screw provides a 75 mm adjust window, shortening the extend stroke from 450 mm down to 375 mm. The stop sets end position only and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ80X450-75
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ80X450-75 replacement — usually within 7-8 hours.