This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ63X25-20S, 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 SIJ63X25-20S
The AirTAC SIJ63 Double Rod Adjustable Cylinder SIJ63X25-20S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 25mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ63X25-20S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke25 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAIJ63X25-20S
- 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 SIJ63X25-20S
The AirTAC SIJ63X25-20S is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. Its external stop screw lets you trim the extend stroke by up to 20 mm on-site, yielding a usable 5-25 mm stroke from the 25 mm nominal maximum. The direct replacement is the SAIJ63X25-20S, preserving the original interface, force, and adjustability.
The SAIJ successor retains the 30 mm adjustable air cushions, M16x1.5 rod thread, and 0.15-1.0 MPa operating range, while upgrading to a two Y-shaped one-way piston seal for lower start-up pressure and longer life. The stop screw sets the end position but is not a load lock; for held loads use SAIL/BSAI or an external rod lock.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X25-20S Technical Specifications
| Model | Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X25-20S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ63X25-20S |
| Bore size | Ø63 mm |
| Stroke | 25 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 SAIJ63X25-20S 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 SAIJ63X25-20S 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 SIJ63X25-20S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×25 | 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 SIJ63X25-20S Is Used
Short-Stroke Clamping
Field-tune the 5-25 mm extend stroke to clamp parts of varying thicknesses without swapping cylinders.
Diverting Gate Stops
Adjust the stop screw on-site to set precise product positioning distances on the line.
Compact Pressing Jigs
Dial in the exact 5-25 mm extend contact point for light-duty pressing and seating tasks.
Replacing the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X25-20S with the SAIJ63X25-20S
To replace the discontinued SIJ63X25-20S, order the direct replacement SAIJ63X25-20S, which matches the 63 mm bore, 25 mm stroke, 20 mm adjust window, G3/8 port, and ISO 15552 mounting. Choose the 20 mm adjust window if your assembly requires field-tuning the extend stroke down to 5 mm. Mounting options include Basic, FA, LB, and TC. The -S suffix ensures a piston magnet for legacy CS1-B/DS1-B sensors (current AirTAC switches are used on the SAIJ). Because the 25 mm stroke is under 300 mm, side-load rod deflection is minimal.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ63X25-20S
- ✓ 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 SIJ63X25-20S FAQ
Yes, the SIJ63X25-20S is discontinued. The direct replacement is the SAIJ63X25-20S, offering the same ISO 15552 interface, 63 mm bore, 25 mm stroke, 20 mm adjust window, G3/8 port, and mounting options.
The external stop screw window is 20 mm, allowing you to trim the extend stroke from the 25 mm nominal maximum down to 5 mm on-site.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ63X25-20S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ63X25-20S replacement — usually within 7-8 hours.