This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ63X50-30S, 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 SIJ63X50-30S
The AirTAC SIJ63 Double Rod Adjustable Cylinder SIJ63X50-30S 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 SAIJ63X50-30S, 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 → SAIJ63X50-30S
- 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 SIJ63X50-30S
The AirTAC SIJ63X50-30S 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 30mm on-site, yielding a usable 20-50mm stroke from the 50mm nominal maximum. The 63mm bore uses a G3/8 port, M16x1.5 rod thread, and 30mm adjustable cushions.
The direct replacement is the SAIJ63X50-30S, retaining the same ISO 15552 interface, bore, force, adjust window, and mounting. The SAIJ family upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. The stop screw sets the end position but is not a lock; loads drift on air loss, so use an external rod lock or SAIL/BSAI variant for holding. With -S, a piston magnet enables legacy CS1-B/DS1-B switches.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X50-30S Technical Specifications
| Model | Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X50-30S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ63X50-30S |
| 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 SAIJ63X50-30S 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 SAIJ63X50-30S 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 SIJ63X50-30S
| 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 SIJ63X50-30S Is Used
Adjustable End-Stop Clamping
Field-tune the 20-50mm extend position to clamp parts of varying heights without swapping the entire cylinder or adding external stop blocks.
Variable Length Diverter
Trim the extend stroke by up to 30mm on-site to deflect different package sizes on a conveyor line, ensuring precise routing without repositioning mounts.
Tiered Height Push-Off
Set the external stop screw to push items off specific pallet tiers, adjusting the extend end position dynamically for mixed-load packaging stations.
Replacing the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X50-30S with the SAIJ63X50-30S
To replace the discontinued SIJ63X50-30S, order the direct replacement SAIJ63X50-30S, reusing your existing FA, LB, or TC ISO 15552 mounts. The 30mm adjust window allows field-tuning the extend end position from 20 to 50mm. The -S suffix provides a piston magnet for legacy CS1-B/DS1-B switches. Because the stroke is under 300mm, side-load rod deflection is minimal.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ63X50-30S
- ✓ 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 SIJ63X50-30S FAQ
Yes, the SIJ63X50-30S is discontinued. The direct replacement is the SAIJ63X50-30S, which shares the same ISO 15552 interface, 63mm bore, 50mm nominal stroke, 30mm adjust window, G3/8 port, and mounting options. The SAIJ upgrade features an improved two Y-shaped one-way piston seal for lower start-up pressure and longer life.
The external stop screw window is 30mm, allowing you to shorten the 50mm nominal extend stroke down to 20mm on-site. Note that the stop sets end position only; it is not a load lock, and the cylinder drifts on air loss.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ63X50-30S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ63X50-30S replacement — usually within 7-8 hours.