This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ80X250-50S, 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 SIJ80X250-50S
The AirTAC SIJ80 Dual Axis Adjustable Cylinder SIJ80X250-50S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 250mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ80X250-50S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke250 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ80X250-50S
- 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 SIJ80X250-50S
The AirTAC SIJ80X250-50S is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 250 mm nominal stroke and a built-in piston magnet (-S). An external stop screw lets you trim the extend stroke by up to 50 mm on-site, giving a usable extend range of 200-250 mm. The 80 mm bore uses a G3/8 port, a Ø25 mm rod with an M20x1.5 thread, and 36 mm adjustable air cushions at each end.
The direct replacement is the SAIJ80X250-50S, which retains the same ISO 15552 mounting interface, bore, force, and adjust window. The SAIJ family upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. Note the stop screw sets end position only; it is not a load lock, so use an external rod lock or SAIL/BSAI variant for held loads.
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X250-50S Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X250-50S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X250-50S |
| Bore size | Ø80 mm |
| Stroke | 250 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 SAIJ80X250-50S 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 SAIJ80X250-50S 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 SIJ80X250-50S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×250 | 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 SIJ80X250-50S Is Used
Variable-depth Forming Press
Adjusts the extend stroke on-site by up to 50 mm to accommodate different material thicknesses without retooling the entire press line.
Adjustable Diverter Gate
Tunes the extend stroke between 200 and 250 mm on-site to handle varying package sizes on a sorting conveyor.
Customizable End-stop Pusher
Provides a field-tuned end position for aligning pallets, allowing operators to dial in the exact 50 mm stroke trim required for mixed loads.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X250-50S with the SAIJ80X250-50S
To replace the discontinued SIJ80X250-50S, specify SAIJ80X250-50S directly—it is a direct match for the ISO 15552 dimensions, G3/8 port, and 50 mm adjust window. Choose the 50 mm adjust window if your extend stroke needs field tuning between 200 and 250 mm. Mounting options include FA, LB, and TC brackets. The -S suffix provides a piston magnet for legacy CS1-B/DS1-B switches (the SAIJ uses current AirTAC switches). For strokes of 300 mm or longer, verify side-load limits to prevent excessive guide wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X250-50S
- ✓ 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 SIJ80X250-50S FAQ
Yes, the AirTAC SIJ80X250-50S is discontinued. The direct replacement is the SAIJ80X250-50S. It shares the same ISO 15552 interface, 80 mm bore, 250 mm nominal stroke, 50 mm adjust window, G3/8 port, and mounting options, but features an upgraded two-piece Y-shaped piston seal for longer life.
The external stop screw provides a 50 mm adjust window, allowing the extend stroke to be shortened from the 250 mm maximum down to 200 mm on-site. The stop sets end position only and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ80X250-50S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ80X250-50S replacement — usually within 7-8 hours.