This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ80X300-75, 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 SIJ80X300-75
The AirTAC SIJ80 Dual Axis Adjustable Cylinder SIJ80X300-75 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 SAIJ80X300-75, 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 → SAIJ80X300-75
- 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 SIJ80X300-75
The AirTAC SIJ80X300-75 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with an 80mm bore and 300mm nominal stroke. An external stop screw lets you trim the extend stroke by up to 75mm on-site, yielding a usable 225-300mm extension. The stop sets the end position but is not a load lock.
The direct replacement is the SAIJ80X300-75, matching the ISO 15552 mounting interface, force, and adjust window. The SAIJ upgrade uses a two Y-shaped one-way piston seal for low start-up pressure and long life. This non-magnet SKU cannot take a switch; for load holding without live air, use an external rod lock or SAIL/BSAI variant.
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X300-75 Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X300-75 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X300-75 |
| 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 SAIJ80X300-75 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 SAIJ80X300-75 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 SIJ80X300-75
| 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 SIJ80X300-75 Is Used
Press Fit Tuning
Allows operators to dial in the exact 225-300mm extend position for pressing bearings without machining hard stops.
Variable Length Diverter
Adjusts the extend stroke on-site to deflect varying package sizes on a packaging line.
Prototype Actuation
Provides a flexible 75mm trim window for R&D rigs where the final end-of-stroke target evolves during testing.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X300-75 with the SAIJ80X300-75
To replace the discontinued SIJ80X300-75, order the direct replacement SAIJ80X300-75, which preserves the 300mm stroke, 75mm adjust window, and G3/8 port. Select the 75mm adjust window if you need to tune the extend stroke down to 225mm on-site. Reuse FA, LB, or TC mounts via the ISO 15552 interface. Because this SKU lacks the -S suffix, it cannot accept a magnetic switch. For the 300mm stroke, use external guides to prevent rod bending and manage side loads. The stop screw sets end position only; it is not a lock, so add a pilot-operated check valve for held loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X300-75
- ✓ 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 SIJ80X300-75 FAQ
Yes, the SIJ80X300-75 is discontinued. The direct replacement is the SAIJ80X300-75. It matches the ISO 15552 interface, 80mm bore, 300mm stroke, 75mm adjust window, and G3/8 port. The SAIJ family uses an upgraded two Y-shaped one-way piston seal for longer life.
The theoretical max is 513kgf at 1.0MPa. The external stop screw provides a 75mm adjust window, allowing you to shorten the extend stroke from 300mm down to 225mm. The stop sets position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ80X300-75
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ80X300-75 replacement — usually within 7-8 hours.