This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ63X50-50, 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 SIJ63 Double Rod Adjustable Cylinder SIJ63X50-50
The AirTAC SIJ63 Double Rod Adjustable Cylinder SIJ63X50-50 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 50mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ63X50-50, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke50 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAIJ63X50-50
- 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 SIJ63 Double Rod Adjustable Cylinder SIJ63X50-50
The AirTAC SIJ63X50-50 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. An external stop screw lets you trim the extend stroke by up to 50mm on-site, dropping the usable extend length from the 50mm maximum down to zero. Because this SIJ is end-of-life, the direct replacement is the SAIJ63X50-50, preserving the same interface, force, and adjust window.
The SAIJ successor upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. This non-magnet SKU lacks a -S switch groove and cannot take legacy CS1-B/DS1-B sensors. The stop screw sets end position but is not a load lock; for held loads use SAIL/BSAI or an external rod lock.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X50-50 Technical Specifications
| Model | Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X50-50 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ63X50-50 |
| Bore size | Ø63 mm |
| Stroke | 50 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| 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 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAIJ63X50-50 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 kgf | |
The SAIJ63X50-50 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X50-50
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×50 | 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 SIJ63 Double Rod Adjustable Cylinder SIJ63X50-50 Is Used
Press-Fit Stop Tuning
Light-duty press operations needing precise end-position tuning without swapping cylinders, using the stop screw to dial in the exact 0-50mm extend contact point.
Diverter Gate Adjustment
Conveyor diverters requiring field stroke trimming to accommodate varying package sizes on the fly, shortening the extend stroke up to 50mm as needed.
Variable Pitch Stops
Palletizing stops that must be adjusted for different product heights without disassembling the pneumatic circuit, relying on the external stop screw.
Replacing the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X50-50 with the SAIJ63X50-50
To replace the SIJ63X50-50, order the SAIJ63X50-50 (insert A after the leading S) for an exact ISO 15552 direct. Choose the -50mm adjust window when you need to tune the extend end-position on-site. Mounting interfaces (Basic, FA, LB, TC) reuse existing ISO 15552 holes. This SKU has no -S magnet, so it cannot accept sensors. For this 50mm stroke, side-load is minimal; note that for any stroke >=300mm, guide the load to prevent rod bending. The stop screw is not a lock; add a pilot-operated check valve for load holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ63X50-50
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X50-50 FAQ
Yes, the AirTAC SIJ63X50-50 is discontinued. The direct replacement is the SAIJ63X50-50. It shares the same ISO 15552 interface, 63mm bore, 50mm stroke, 50mm adjust window, G3/8 port, and mounting options, while upgrading the piston seal.
The theoretical max is 318kgf at 1.0MPa. The external stop screw window is -50mm, allowing you to trim the extend stroke by up to 50mm on-site. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ63X50-50
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ63X50-50 replacement — usually within 7-8 hours.