This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ63X500-50, 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 SIJ63X500-50
The AirTAC SIJ63 Double Rod Adjustable Cylinder SIJ63X500-50 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 500mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ63X500-50, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke500 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAIJ63X500-50
- 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 SIJ63X500-50
The AirTAC SIJ63X500-50 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 50 mm on-site, giving a usable 450-500 mm window (the 500 mm nominal is the maximum). It features a G3/8 port, M16x1.5 rod thread, and 30 mm adjustable air cushions. Because this SIJ model is end-of-life, the direct replacement is the SAIJ63X500-50—identical ISO 15552 interface, bore, stroke, force, and mountings.
The SAIJ upgrade uses an upgraded piston seal (two Y-shaped one-way elements for low start-up pressure and long life). Note this non-magnetic SKU cannot take a switch. The stop screw sets end position only; it is not a lock. For load holding on air loss, use an external rod lock or SAIL/BSAI variant.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X500-50 Technical Specifications
| Model | Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X500-50 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ63X500-50 |
| Bore size | Ø63 mm |
| Stroke | 500 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 SAIJ63X500-50 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 SAIJ63X500-50 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 SIJ63X500-50
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×500 | 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 SIJ63X500-50 Is Used
Press Fit Tuning
Trimming the extend stroke by up to 50 mm on-site allows precise press-fit depth adjustment without machining custom spacers.
Variable Length Diverter
Adjusting the extend end position lets a single diverter accommodate varying package lengths on a packaging line.
Adjustable End Stop
The external stop screw sets a firm mechanical end position for pallets, fine-tuned within the 450-500 mm window.
Replacing the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X500-50 with the SAIJ63X500-50
To replace the discontinued SIJ63X500-50, order the direct replacement SAIJ63X500-50, keeping the same ISO 15552 mounting interface (Basic, FA, LB, TC) and G3/8 port. Choose the 50 mm adjust window if you need on-site extend tuning between 450-500 mm. This SKU lacks the -S magnet, so it cannot accept legacy CS1-B/DS1-B sensors. Because the 500 mm stroke is long, mind side-load and rod-bending—use external guides to prevent premature wear. The stop screw is not a load lock; for held loads use an external rod lock.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ63X500-50
- ✓ 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 SIJ63X500-50 FAQ
Yes, the SIJ63X500-50 is discontinued. The direct replacement is the SAIJ63X500-50. It shares the same ISO 15552 interface, 63 mm bore, 500 mm stroke, 50 mm adjust window, G3/8 port, and mounting options, but adds an upgraded piston seal.
The external stop screw provides a 50 mm adjust window, allowing you to shorten the extend stroke from the 500 mm maximum down to 450 mm. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ63X500-50
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ63X500-50 replacement — usually within 7-8 hours.