This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ63X450-75S, 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 SIJ63X450-75S
The AirTAC SIJ63 Double Rod Adjustable Cylinder SIJ63X450-75S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 450mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ63X450-75S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke450 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAIJ63X450-75S
- 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 SIJ63X450-75S
The AirTAC SIJ63X450-75S is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 63 mm bore, G3/8 port, and 450 mm maximum extend stroke. An external stop screw lets you trim the extend stroke by up to 75 mm on-site, yielding a usable 375-450 mm window. The direct replacement is the SAIJ63X450-75S, sharing the same interface, force, and adjustability.
The SAIJ successor retains the upgraded SAI piston seal (two Y-shaped one-way elements for low start-up pressure and long life) and adds family variants like the SAIL air-released lock and BSAI clamp-lock the SI line lacked. The -S suffix denotes a built-in piston magnet for legacy CS1-B/DS1-B switches; the SAIJ uses current AirTAC switches. The stop screw sets end position but is not a load lock.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X450-75S Technical Specifications
| Model | Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X450-75S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ63X450-75S |
| Bore size | Ø63 mm |
| Stroke | 450 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 SAIJ63X450-75S 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 SAIJ63X450-75S 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 SIJ63X450-75S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×450 | 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 SIJ63X450-75S Is Used
Variable-Length Clamping
Parts of varying heights require field stroke tuning; the 75 mm adjust window allows operators to set the exact clamping extension on-site without swapping cylinders.
Adjustable Transfer Stops
Diverting different package sizes on a line benefits from a stop screw that trims the extend stroke by up to 75 mm, ensuring precise positioning for each format change.
Variable-Depth Sorting
Sorting lanes that handle mixed product depths use the 375-450 mm usable stroke window to adapt the pusher endpoint dynamically to the required container depth.
Replacing the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X450-75S with the SAIJ63X450-75S
To replace the discontinued SIJ63X450-75S, order the exact direct replacement SAIJ63X450-75S, keeping the 63 mm bore, 450 mm nominal stroke, 75 mm adjust window, and G3/8 port. Choose the 75 mm adjust window when you need on-site stroke tuning between 375-450 mm. Mounting interfaces include Basic, FA, LB, and TC. The -S suffix confirms the piston magnet is present. Because the 450 mm stroke is long, account for side-load and rod-bending forces by using external guides to prevent premature wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ63X450-75S
- ✓ 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 SIJ63X450-75S FAQ
Yes, the SIJ63X450-75S is discontinued. The direct replacement is the SAIJ63X450-75S. It shares the same ISO 15552 interface, 63 mm bore, 450 mm stroke, 75 mm adjust window, G3/8 port, and mounting options, but features an upgraded piston seal.
The external stop screw allows you to trim the extend stroke by up to 75 mm on-site, giving a usable 375-450 mm window. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ63X450-75S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ63X450-75S replacement — usually within 7-8 hours.