This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ63X50-30STC, 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 SIJ63X50-30STC
The AirTAC SIJ63 Double Rod Adjustable Cylinder SIJ63X50-30STC 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 SAIJ63X50-30STC, 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 → SAIJ63X50-30STC
- 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 SIJ63X50-30STC
The AirTAC SIJ63X50-30STC 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 extension from the 50mm nominal maximum. This SIJ is discontinued; the direct replacement is the SAIJ63X50-30STC, retaining the same interface, force, and TC mount.
Upgrading to the SAIJ family brings an upgraded two-piece Y-shaped piston seal for lower start-up pressure and longer life. The stop screw sets the end position but is not a load lock; use an external rod lock or SAIL/BSAI variant for held loads.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X50-30STC Technical Specifications
| Model | Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X50-30STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ63X50-30STC |
| 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 SAIJ63X50-30STC 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 SAIJ63X50-30STC 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 SIJ63X50-30STC
| 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 SIJ63X50-30STC Is Used
Variable Depth Forming
Dial in the exact 20-50mm extend contact point for metal pressing operations where material thickness varies between batches.
Adjustable Transfer Stops
Act as a lane diverter on a packaging line, trimming the 50mm stroke by up to 30mm on-site to accommodate changing carton dimensions.
Tiered Pallet Positioning
Engage loads at varying pallet heights using the external stop screw to set precise extension without re-plumbing the G3/8 air lines.
Replacing the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X50-30STC with the SAIJ63X50-30STC
To replace the discontinued SIJ63X50-30STC, order the direct replacement SAIJ63X50-30STC, keeping the 50mm nominal stroke and 30mm adjust window. The TC mounting accessory secures the centerline, and the -S suffix ensures a piston magnet for legacy CS1-B/DS1-B sensors. Because the nominal stroke is under 300mm, side-load rod deflection is minimal. Remember the stop screw merely trims the extend end position and does not lock the load on air loss.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ63X50-30STC
- ✓ 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 SIJ63X50-30STC FAQ
Yes, the SIJ63X50-30STC is discontinued. The direct replacement is the SAIJ63X50-30STC. It shares the same ISO 15552 interface, 63mm bore, 50mm stroke, 30mm adjust window, G3/8 port, and TC mounting, while adding an upgraded piston seal.
The external stop screw allows trimming the extend stroke by up to 30mm on-site, giving a usable 20-50mm extension from the 50mm nominal maximum.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ63X50-30STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ63X50-30STC replacement — usually within 7-8 hours.