This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ80X400-75S, 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 SIJ80X400-75S
The AirTAC SIJ80 Dual Axis Adjustable Cylinder SIJ80X400-75S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 400mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ80X400-75S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke400 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ80X400-75S
- 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 SIJ80X400-75S
The AirTAC SIJ80X400-75S is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 400 mm nominal stroke and a built-in piston magnet. An external stop screw lets you trim the extend stroke by up to 75 mm on-site, yielding a usable 325-400 mm window. The 80 mm bore uses a G3/8 port, a Ø25 mm rod with an M20x1.5 thread, and 36 mm adjustable air cushions.
This SIJ model is discontinued; the direct replacement is the SAIJ80X400-75S, which preserves the ISO 15552 mounting interface, bore, stroke, adjust window, and port. The SAIJ family upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. The stop screw sets end position only; it is not a load lock, so use an external rod lock or SAIL/BSAI variant to hold loads on air loss.
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X400-75S Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X400-75S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X400-75S |
| Bore size | Ø80 mm |
| Stroke | 400 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 SAIJ80X400-75S 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 SAIJ80X400-75S 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 SIJ80X400-75S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×400 | 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 SIJ80X400-75S Is Used
Variable-depth Forming Press
Tunes the extend stroke on-site by up to 75 mm to accommodate different material thicknesses without swapping the entire cylinder.
Adjustable Transfer Diverter
Sets precise 325-400 mm extend endpoints to route varying package sizes on a conveyor line, adjusting the stop screw as needed.
Multi-height Pallet Stopper
Provides field-adjustable end positions for pallets of different heights, using the external stop to set the exact 80 mm bore extend limit.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X400-75S with the SAIJ80X400-75S
To replace the discontinued SIJ80X400-75S, order the direct replacement SAIJ80X400-75S—same ISO 15552 interface, 75 mm adjust window, G3/8 port, and 36 mm cushions. Choose the 75 mm adjust window if your extend stroke needs on-site tuning between 325 and 400 mm. Reuse FA, LB, or TC mountings directly. The -S suffix means a piston magnet is present for CS1-B/DS1-B switches (the SAIJ uses current AirTAC switches). For the 400 mm stroke, add external guides to prevent rod bending and manage side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X400-75S
- ✓ 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 SIJ80X400-75S FAQ
Yes, the SIJ80X400-75S is discontinued. The direct replacement is the SAIJ80X400-75S. It shares the same ISO 15552 interface, 80 mm bore, 400 mm nominal stroke, 75 mm adjust window, G3/8 port, and mounting options. The SAIJ family also upgrades the piston seal to two Y-shaped one-way elements for longer life.
The external stop screw window is 75 mm, allowing the extend stroke to be shortened from the 400 mm maximum down to 325 mm. The stop sets end position only; it is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ80X400-75S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ80X400-75S replacement — usually within 7-8 hours.