This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ50X280-100, 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 SIJ50 Double Rod Adjustable Cylinder SIJ50X280-100
The AirTAC SIJ50 Double Rod Adjustable Cylinder SIJ50X280-100 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 280mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ50X280-100, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke280 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAIJ50X280-100
- 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 SIJ50 Double Rod Adjustable Cylinder SIJ50X280-100
The AirTAC SIJ50X280-100 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. The external stop screw lets you trim the extend stroke by up to 100mm on-site, giving a usable 180-280mm range. The direct replacement is the SAIJ50X280-100, matching the interface, force, and mounts.
The SAIJ upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The stop screw sets end position but is not a load lock; use SAIL or BSAI for held loads.
Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X280-100 Technical Specifications
| Model | Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X280-100 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ50X280-100 |
| Bore size | Ø50 mm |
| Stroke | 280 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M16×1.5 |
| 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, 30 mm |
| Max standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAIJ50X280-100 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
The SAIJ50X280-100 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X280-100
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×280 | 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 SIJ50 Double Rod Adjustable Cylinder SIJ50X280-100 Is Used
Variable Depth Forming
Field-tune the extend stroke within the 180-280mm window to alter press depth for different material thicknesses without swapping cylinders.
Adjustable Diverter Arms
Trim the extend stroke by up to 100mm on-site to reposition diverters when package sizes on the line change.
Variable Stroke Sealing
Fine-tune the end position for sealing heads to accommodate varying carton heights using the external stop screw.
Replacing the Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X280-100 with the SAIJ50X280-100
To replace this discontinued SIJ50X280-100, order the direct replacement SAIJ50X280-100, reusing your FA, LB, or TC mounts. The 100mm adjust window is ideal for field tuning the 180-280mm extend stroke. As this SKU lacks a -S magnet, it cannot take a magnetic switch. For the 280mm stroke, check side-load guide tolerance. The stop sets position, not a lock.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ50X280-100
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X280-100 FAQ
Yes, the SIJ50X280-100 is discontinued. The direct replacement is the SAIJ50X280-100, which matches the ISO 15552 interface, 50mm bore, 280mm nominal stroke, 100mm adjust window, G1/4 port, and mounting options.
The external stop screw trims the extend stroke by up to 100mm, yielding a usable 180-280mm range. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ50X280-100
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ50X280-100 replacement — usually within 7-8 hours.