This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ80X250-100S, 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 SIJ80X250-100S
The AirTAC SIJ80 Dual Axis Adjustable Cylinder SIJ80X250-100S 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 SAIJ80X250-100S, 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 → SAIJ80X250-100S
- 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 SIJ80X250-100S
The AirTAC SIJ80X250-100S is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 250 mm nominal stroke. An external stop screw lets you trim the extend stroke by up to 100 mm on-site, yielding a usable 150-250 mm window. The 80 mm bore uses a G3/8 port, M20x1.5 rod thread, and 36 mm adjustable cushions. This unit includes a piston magnet (-S) for legacy CS1-B/DS1-B switches. The direct replacement is the SAIJ80X250-100S, sharing the same interface, force, and mounting.
The SAIJ upgrade features a two Y-shaped one-way piston seal for lower start-up pressure and longer life. Remember 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 SIJ80X250-100S Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X250-100S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X250-100S |
| 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 SAIJ80X250-100S 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 SAIJ80X250-100S 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 SIJ80X250-100S
| 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 SIJ80X250-100S Is Used
Variable Depth Forming Press
Needs field stroke tuning to alter part depths without changing tooling, using the 100 mm adjust screw to set precise bottom-dead-center on different material batches.
Adjustable Package Rejector
Requires on-site stroke trims to accommodate changing box widths on a packaging line, retracting the extend stop to prevent damaging varying parcel sizes.
Multi-Tier Pallet Positioner
Demands adjustable extend endpoints to interface with different pallet stack heights, using the external stop to safely vary the final push position dynamically.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X250-100S with the SAIJ80X250-100S
To replace the discontinued SIJ80X250-100S, order the exact direct replacement SAIJ80X250-100S, retaining the 250 mm nominal stroke and 100 mm adjust window. Choose the adjust window based on your maximum required on-site variation. Mounting interfaces (FA, LB, TC) reuse existing ISO 15552 holes. The -S suffix confirms a piston magnet for position sensing. For strokes >=300 mm, verify guide alignment to prevent excessive side-loading on the rod. The SAIJ family also adds SAIF (built-in valve) and BSAI (clamp-lock) variants the SI line lacked.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X250-100S
- ✓ 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 SIJ80X250-100S FAQ
Yes, the SIJ80X250-100S is discontinued. The direct replacement is the SAIJ80X250-100S. It shares the identical ISO 15552 interface, 80 mm bore, 250 mm stroke, 100 mm adjust window, G3/8 port, and mounting options. The SAIJ uses an upgraded two Y-shaped one-way piston seal for lower start-up pressure and longer life.
The external stop screw allows you to trim the extend stroke by up to 100 mm on-site, giving a usable extend window of 150-250 mm. The stop sets end position only and is not a load lock; for held loads use an external rod lock or SAIL/BSAI variant.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ80X250-100S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ80X250-100S replacement — usually within 7-8 hours.