This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ63X25-30, 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 SIJ63X25-30
The AirTAC SIJ63 Double Rod Adjustable Cylinder SIJ63X25-30 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 SAIJ63X25-30, 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 → SAIJ63X25-30
- 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 SIJ63X25-30
The AirTAC SIJ63X25-30 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. It features a 63mm bore, G3/8 port, and a 25mm nominal extend stroke. An external stop screw lets you trim the extend stroke by up to 30mm on-site, yielding a usable 0-25mm window. This stop sets the end position but is not a load lock. The direct replacement is the SAIJ63X25-30, sharing the same interface, force, and mounts.
The SAIJ successor incorporates an upgraded piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life. This SKU has no magnet (-S omitted), so it cannot accept a magnetic switch. A plain cylinder drifts on air loss; for held loads use an external rod lock or the SAIL/BSAI lock variants.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X25-30 Technical Specifications
| Model | Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X25-30 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ63X25-30 |
| 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 SAIJ63X25-30 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 SAIJ63X25-30 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 SIJ63X25-30
| 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 SIJ63X25-30 Is Used
Short-Stroke Clamping
Field-tunes the 0-25mm extend contact point on machining fixtures without swapping cylinders.
Variable Diverters
Adjusts the actuator end-position on the fly to handle varying package sizes on a line.
Prototype Forming
Dials in the exact 0-25mm pressing depth for short-run material testing and prototyping.
Replacing the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X25-30 with the SAIJ63X25-30
To replace the SIJ63X25-30, order the direct replacement SAIJ63X25-30, reusing your existing FA, LB, or TC ISO 15552 mounts. The 30mm adjust window allows field-tuning the extend down from the 25mm maximum, which is ideal when a fixed SAI cylinder plus external stop would be too bulky. This non-magnetic SKU cannot take a switch. For strokes over 300mm, verify side-load limits to prevent guide wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ63X25-30
- ✓ 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 SIJ63X25-30 FAQ
Yes, the SIJ63X25-30 is discontinued. The direct replacement is the SAIJ63X25-30. It shares the same 63mm bore, 25mm stroke, 30mm adjust window, G3/8 port, and ISO 15552 mounting interface.
The external stop screw allows trimming the extend stroke by up to 30mm on-site, giving a usable 0-25mm stroke window.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ63X25-30
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ63X25-30 replacement — usually within 7-8 hours.