This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ50X75-30, 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 SIJ50X75-30
The AirTAC SIJ50 Double Rod Adjustable Cylinder SIJ50X75-30 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 75mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ50X75-30, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke75 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAIJ50X75-30
- 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 SIJ50X75-30
The AirTAC SIJ50X75-30 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 50mm bore and 75mm maximum stroke. An external stop screw lets you trim the extend stroke by up to 30mm on-site, yielding a usable 45-75mm window. The direct replacement is the SAIJ50X75-30, matching the interface, force, and mounting.
The SAIJ successor retains the ISO 15552 mounting dimensions for direct reuse and adds an upgraded piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life. This SKU lacks a magnet (-S) and cannot accept a sensor. 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.
Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X75-30 Technical Specifications
| Model | Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X75-30 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ50X75-30 |
| Bore size | Ø50 mm |
| Stroke | 75 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 SAIJ50X75-30 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 SAIJ50X75-30 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 SIJ50X75-30
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×75 | 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 SIJ50X75-30 Is Used
Variable Pitch Push
Tuning the extend stroke on-site by up to 30mm to push parts into fixtures at slightly different depths without swapping cylinders.
Sorting Diverter
Adjusting the extend end position in real-time to deflect varying package sizes on a conveyor line within the 45-75mm window.
Replacing the Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X75-30 with the SAIJ50X75-30
To replace the discontinued SIJ50X75-30, order the direct replacement SAIJ50X75-30, keeping the 75mm nominal stroke and 30mm adjust window (45-75mm usable extend). Choose FA, LB, or TC mounting per your ISO 15552 fixture. Because this SKU has no -S magnet, it cannot support position sensing. For strokes of 300mm or longer, verify side-load limits to prevent guide failure.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ50X75-30
- ✓ 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 SIJ50X75-30 FAQ
Yes, the SIJ50X75-30 is discontinued. The direct replacement is the SAIJ50X75-30, which shares the same ISO 15552 interface, 50mm bore, 75mm stroke, 30mm adjust window, and G1/4 port. The SAIJ family also features an upgraded piston seal for longer life.
The external stop screw allows you to trim the extend stroke by up to 30mm on-site, giving a usable extend window of 45-75mm. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ50X75-30
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ50X75-30 replacement — usually within 7-8 hours.