This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ63X70-50, 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 SIJ63X70-50
The AirTAC SIJ63 Double Rod Adjustable Cylinder SIJ63X70-50 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 70mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ63X70-50, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke70 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAIJ63X70-50
- 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 SIJ63X70-50
The AirTAC SIJ63X70-50 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 20-70 mm window from the 70 mm nominal maximum. The 63 mm bore uses a G3/8 port, M16x1.5 rod thread, and 30 mm adjustable cushions.
As the SIJ line is end-of-life, the direct replacement is the SAIJ63X70-50, matching the ISO 15552 mounting interface, force, and adjust window. The SAIJ upgrade uses a two Y-shaped one-way piston seal for low start-up pressure and longer life. This plain non-magnet SKU cannot take a switch.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X70-50 Technical Specifications
| Model | Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X70-50 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ63X70-50 |
| Bore size | Ø63 mm |
| Stroke | 70 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 SAIJ63X70-50 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 SAIJ63X70-50 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 SIJ63X70-50
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×70 | 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 SIJ63X70-50 Is Used
Variable Press Stroke
Adjusting the extend stop on-site tunes the pressing depth of an assembly fixture without swapping cylinders.
Sorter Diverter Tuning
Trimming the extend stroke lets operators alter the diverter reach to accommodate varying package widths.
Adjustable Stop Position
External stop screw sets the exact end position for pallets, allowing quick format changes on the line.
Replacing the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X70-50 with the SAIJ63X70-50
To replace the SIJ63X70-50, order the direct replacement SAIJ63X70-50. Choose the 50 mm adjust window if you need to trim the extend stroke down to 20 mm; the stop sets end position but is NOT a load lock. Mounting reuses ISO 15552 FA, LB, or TC brackets. This SKU lacks the -S magnet, so it cannot accept a sensor. For stroke >=300 mm, confirm guide tolerance to avoid side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ63X70-50
- ✓ 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 SIJ63X70-50 FAQ
Yes, the SIJ63X70-50 is discontinued. The direct replacement is the SAIJ63X70-50, which matches the ISO 15552 interface, bore, force, G3/8 port, and 50 mm adjust window. The SAIJ adds an upgraded piston seal for longer life.
The external stop screw provides a 50 mm adjust window, allowing the 70 mm extend stroke to be shortened to 20 mm on-site. The stop sets position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ63X70-50
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ63X70-50 replacement — usually within 7-8 hours.