This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ80X300-40, 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 SIJ80X300-40
The AirTAC SIJ80 Dual Axis Adjustable Cylinder SIJ80X300-40 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 300mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ80X300-40, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke300 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ80X300-40
- 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 SIJ80X300-40
The AirTAC SIJ80X300-40 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 300 mm nominal stroke. An external stop screw lets you trim the extend stroke by up to 40 mm on-site, yielding a usable 260-300 mm extension window. The direct replacement is the SAIJ80X300-40, preserving the original interface, bore, force, and mounting.
Because this SKU lacks a -S magnet, it cannot accept a magnetic switch for position sensing. The SAIJ upgrade introduces an improved two-piece Y-shaped piston seal for lower start-up pressure and longer life. Note that the external stop sets end position only; it is not a load lock, and the piston will drift on air loss.
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X300-40 Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X300-40 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X300-40 |
| Bore size | Ø80 mm |
| Stroke | 300 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 SAIJ80X300-40 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 SAIJ80X300-40 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 SIJ80X300-40
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×300 | 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 SIJ80X300-40 Is Used
Press Fit Tuning
Allows operators to dial in the exact 260-300 mm extend position on-site for pressing bearings without machining custom spacers.
Variable Length Diverter
Adjusts the extend stop to deflect varying package sizes on a conveyor line, trimming up to 40 mm off the nominal stroke.
Adjustable End Stop
Provides a field-tunable hard stop for pallet positioning tasks where the exact end-of-stroke contact point fluctuates.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X300-40 with the SAIJ80X300-40
To replace the discontinued SIJ80X300-40, order the direct replacement SAIJ80X300-40, which matches the 80 mm bore, 300 mm stroke, 40 mm adjust window, G3/8 port, and ISO 15552 mounting. Choose the 40 mm adjust window if your extend stroke needs on-site tuning between 260 and 300 mm. Mounting attachments (FA, LB, TC) can be reused from the legacy ISO 15552 interface. For the 300 mm stroke, use external guides to prevent rod bending under side loads. This non-magnetic SKU cannot support sensors; for load holding on air loss, use an external rod lock or SAIL/BSAI variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X300-40
- ✓ 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 SIJ80X300-40 FAQ
Yes, the SIJ80X300-40 is discontinued. The direct replacement is the SAIJ80X300-40. It shares the identical ISO 15552 interface, 80 mm bore, 300 mm stroke, 40 mm adjust window, G3/8 port, and mounting options, while adding an upgraded piston seal.
The external stop screw provides a 40 mm trim window, allowing the extend stroke to be shortened from 300 mm down to 260 mm on-site.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ80X300-40
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ80X300-40 replacement — usually within 7-8 hours.