This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ80X350-75, 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 SIJ80X350-75
The AirTAC SIJ80 Dual Axis Adjustable Cylinder SIJ80X350-75 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 350mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ80X350-75, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke350 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ80X350-75
- 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 SIJ80X350-75
The AirTAC SIJ80X350-75 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 350 mm nominal stroke. An external stop screw lets you trim the extend stroke by up to 75 mm on-site, yielding a usable 275-350 mm window. This SKU has no magnet and cannot take a switch.
As SIJ is end-of-life, the direct replacement is the SAIJ80X350-75, matching the bore, force, port, and mounting. The SAIJ upgrade uses a two Y-shaped one-way piston seal for low start-up pressure and long life. The stop sets end position but is not a load lock.
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X350-75 Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X350-75 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X350-75 |
| Bore size | Ø80 mm |
| Stroke | 350 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 SAIJ80X350-75 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 SAIJ80X350-75 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 SIJ80X350-75
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×350 | 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 SIJ80X350-75 Is Used
Variable Depth Drilling
Adjusts the extend stroke by up to 75 mm on-site to accommodate multiple material thicknesses on a single fixture without retooling the entire 350 mm travel.
Variable Length Diverter
Tunes the actuator reach from 275 to 350 mm to divert differing package sizes on a conveyor line, ensuring positive contact without overextending.
Adjustable Height Stopper
Provides a field-adjustable hard stop for pallets or product feeds, allowing operators to shorten the extend position precisely when downstream clearance changes.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X350-75 with the SAIJ80X350-75
To replace the SIJ80X350-75, order the direct replacement SAIJ80X350-75, reusing your ISO 15552 FA, LB, or TC mounts. Choose the 75 mm adjust window if you need on-site extend trimming from 350 mm down to 275 mm. Because this SKU lacks the -S magnet, it cannot support legacy CS1-B/DS1-B sensors. For the 350 mm stroke, use external guides to prevent rod bending and side-load wear. The stop screw sets end position but is not a lock; for held loads use SAIL, BSAI, or an external rod lock, as air cushions only decelerate.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X350-75
- ✓ 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 SIJ80X350-75 FAQ
Yes, the SIJ80X350-75 is discontinued. The direct replacement is the SAIJ80X350-75, which shares the identical ISO 15552 interface, 80 mm bore, 350 mm stroke, 75 mm adjust window, G3/8 port, and mounting options. The SAIJ family also adds an upgraded two Y-shaped one-way piston seal for lower start-up pressure and longer life.
The external stop screw provides a 75 mm adjust window, allowing the extend stroke to be shortened from the 350 mm maximum down to 275 mm on-site. The stop sets end position only; it is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ80X350-75
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ80X350-75 replacement — usually within 7-8 hours.