This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ63X40-20, 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 SIJ63X40-20
The AirTAC SIJ63 Double Rod Adjustable Cylinder SIJ63X40-20 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 40mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ63X40-20, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke40 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAIJ63X40-20
- 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 SIJ63X40-20
The AirTAC SIJ63X40-20 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, giving a usable 20-40 mm window from the 40 mm nominal maximum. The direct replacement is the SAIJ63X40-20, matching the interface, force, and mounting.
The SAIJ upgrade brings a two Y-shaped one-way piston seal for low start-up pressure and long life. This non-magnetic SKU cannot take a switch. The stop sets position only; it is not a load lock, so use an external rod lock or SAIL/BSAI variant for held loads.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X40-20 Technical Specifications
| Model | Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X40-20 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ63X40-20 |
| Bore size | Ø63 mm |
| Stroke | 40 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 SAIJ63X40-20 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 SAIJ63X40-20 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 SIJ63X40-20
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×40 | 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 SIJ63X40-20 Is Used
Short-Stroke Clamping
Adjustable 20-40 mm extend for clamping parts of varying thicknesses where exact end-position tuning prevents over-travel damage.
Transfer Diverter
Field-trim the stroke to set a diverter gate's exact reach without swapping the entire cylinder when package sizes change.
Replacing the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X40-20 with the SAIJ63X40-20
To replace the discontinued SIJ63X40-20, order the direct replacement SAIJ63X40-20, reusing your existing FA, LB, or TC ISO 15552 mounts. The 20 mm adjust window is ideal if your end position needs on-site tuning within a 20-40 mm range. Because this SKU lacks the -S magnet, it cannot accept legacy CS1-B/DS1-B sensors; add external sensing if required. Since the 40 mm stroke is under 300 mm, side-load rod deflection is minimal.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ63X40-20
- ✓ 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 SIJ63X40-20 FAQ
Yes, the SIJ63X40-20 is discontinued. The direct replacement is the SAIJ63X40-20. It shares the same ISO 15552 interface, 63 mm bore, 40 mm stroke, 20 mm adjust window, G3/8 port, and mounting options, but adds an upgraded piston seal.
The external stop screw window is 20 mm, allowing you to shorten the 40 mm nominal extend stroke down to 20 mm. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ63X40-20
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ63X40-20 replacement — usually within 7-8 hours.