This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ80X275-20, 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 SIJ80X275-20
The AirTAC SIJ80 Dual Axis Adjustable Cylinder SIJ80X275-20 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 275mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ80X275-20, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke275 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ80X275-20
- 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 SIJ80X275-20
The AirTAC SIJ80X275-20 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with an 80 mm bore and 275 mm maximum stroke. An external stop screw lets you trim the extend stroke by up to 20 mm on-site, giving a usable extend range of 255-275 mm. The stop sets the end position but is not a load lock; use an external rod lock for held loads.
The direct replacement is the SAIJ80X275-20, matching the ISO 15552 interface, force, and mounting. The SAIJ upgrade uses an improved two Y-shaped one-way piston seal for low start-up pressure and long life. This non-magnetic SKU cannot take a switch.
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X275-20 Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X275-20 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X275-20 |
| Bore size | Ø80 mm |
| Stroke | 275 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 SAIJ80X275-20 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 SAIJ80X275-20 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 SIJ80X275-20
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×275 | 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 SIJ80X275-20 Is Used
Press Fit Tuning
Final insertion depth requires on-site tuning; trim the 275 mm extend stroke by up to 20 mm to set the exact press position without re-engineering the fixture.
Divertor Gate Adjustment
Adjusting the extend end position by up to 20 mm allows precise control of the divert gap for varying package sizes on a sorting line.
Pallet Stop Positioning
Set the physical stop point for incoming pallets by fine-tuning the extend stroke within the 255-275 mm window to accommodate different pallet depths.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X275-20 with the SAIJ80X275-20
To replace the discontinued SIJ80X275-20, order the direct replacement SAIJ80X275-20, which preserves the G3/8 port, 25 mm rod, and ISO 15552 mounting dimensions. Choose the 20 mm adjust window if your extend stroke needs on-site tuning between 255 and 275 mm. Mounting options include FA, LB, and TC brackets. Because this SKU lacks the -S magnet, it cannot accept a sensor. For this 275 mm stroke, verify side-load limits to prevent rod distortion.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X275-20
- ✓ 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 SIJ80X275-20 FAQ
Yes, the SIJ80X275-20 is discontinued. The direct replacement is the SAIJ80X275-20, which matches the ISO 15552 interface, 80 mm bore, 275 mm stroke, and G3/8 port. The SAIJ family also adds upgraded two Y-shaped one-way piston seals for lower start-up pressure and longer life.
The external stop screw provides a 20 mm adjust window, allowing you to trim the extend stroke from 275 mm down to 255 mm. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ80X275-20
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ80X275-20 replacement — usually within 7-8 hours.