This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ63X250-30, 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 SIJ63X250-30
The AirTAC SIJ63 Double Rod Adjustable Cylinder SIJ63X250-30 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 250mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ63X250-30, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke250 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAIJ63X250-30
- 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 SIJ63X250-30
The AirTAC SIJ63X250-30 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 30 mm on-site, yielding a usable 220-250 mm extension (250 mm is the maximum). The 63 mm bore uses a G3/8 port, a Ø20 mm rod, and 30 mm adjustable cushions. The direct replacement is the SAIJ63X250-30, matching the interface, force, and adjust window.
Upgrading to the SAIJ family retains the ISO 15552 mounting footprint while adding an upgraded piston seal with 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 load lock; for held loads, consider the SAIL or BSAI lock variants. This non-magnet SKU cannot accept a position switch.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X250-30 Technical Specifications
| Model | Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X250-30 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ63X250-30 |
| Bore size | Ø63 mm |
| Stroke | 250 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 SAIJ63X250-30 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 SAIJ63X250-30 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 SIJ63X250-30
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×250 | 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 SIJ63X250-30 Is Used
Press Fit Tuning
Needs field stroke tuning to dial in the exact 230 mm insertion depth for pressing bearings without re-engineering fixed stops.
Divert Gate Adjustment
Requires trimming the extend stroke on-site by 15 mm to accommodate varying package sizes on the fly.
Pallet Stop Positioning
Demands an adjustable end position between 220 and 250 mm to handle different pallet widths entering a wrap station.
Replacing the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X250-30 with the SAIJ63X250-30
To replace the SIJ63X250-30, order the direct replacement SAIJ63X250-30, keeping the same 63 mm bore, 250 mm max stroke, 30 mm adjust window, and G3/8 port. Choose the 30 mm adjust window if your extend stroke needs fine-tuning between 220 and 250 mm. Mounting options include FA, LB, and TC brackets. Because this SKU lacks the -S magnet, it cannot use legacy CS1-B/DS1-B sensors. For strokes of 300 mm or longer, verify side-load limits to prevent rod bearing wear. Remember, the stop screw sets the end position but does not hold the load on air loss; use an external rod lock for vertical lifting.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ63X250-30
- ✓ 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 SIJ63X250-30 FAQ
Yes, the SIJ63X250-30 is discontinued. The direct replacement is the SAIJ63X250-30. It shares the same ISO 15552 interface, 63 mm bore, 250 mm max stroke, 30 mm adjust window, G3/8 port, and mounting options. The SAIJ also features an upgraded piston seal for longer life.
The theoretical max is 318 kgf at 1.0 MPa. The external stop screw allows you to trim the extend stroke by up to 30 mm on-site, giving a usable extension of 220-250 mm. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ63X250-30
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ63X250-30 replacement — usually within 7-8 hours.