This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ63X450-40, 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 SIJ63X450-40
The AirTAC SIJ63 Double Rod Adjustable Cylinder SIJ63X450-40 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 SAIJ63X450-40, 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 → SAIJ63X450-40
- 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 SIJ63X450-40
The AirTAC SIJ63X450-40 is a double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 63 mm bore and 450 mm maximum extend stroke. An external stop screw lets you trim the extend stroke on-site by up to 40 mm, yielding a usable 410-450 mm window. The stop sets the end position but is not a load lock. This SIJ is discontinued; the direct replacement is the SAIJ63X450-40, matching the G3/8 port, M16x1.5 rod thread, 30 mm cushion and mounting.
The SAIJ upgrade uses a two-piece Y-shaped piston seal for low start-up pressure and long life. As this SKU lacks the -S suffix, it cannot take a magnetic switch.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X450-40 Technical Specifications
| Model | Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X450-40 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ63X450-40 |
| 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 SAIJ63X450-40 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 SAIJ63X450-40 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 SIJ63X450-40
| 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 SIJ63X450-40 Is Used
Variable Depth Drilling
A machining fixture requiring precise drill depth control uses the 40 mm adjust window to fine-tune the 450 mm extend stroke on-site without swapping cylinders.
Adjustable Transfer Pusher
A packaging line handling varying box widths uses the external stop screw to shorten the extend stroke by up to 40 mm, accommodating different product sizes dynamically.
Replacing the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X450-40 with the SAIJ63X450-40
To replace the discontinued SIJ63X450-40, order SAIJ63X450-40 for an exact ISO 15552 direct. Choose the 40 mm adjust window if you need final end-position tuning between 410-450 mm. Mounting interfaces FA, LB, and TC are fully reusable. Because this unit lacks the -S suffix, it cannot accept a legacy CS1-B/DS1-B sensor. At 450 mm stroke, mind side-load and rod-bending forces—use external guides to prevent binding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ63X450-40
- ✓ 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 SIJ63X450-40 FAQ
Yes, the SIJ63X450-40 is discontinued. The direct replacement is the SAIJ63X450-40. It shares the same ISO 15552 interface, 63 mm bore, 450 mm stroke, 40 mm adjust window, G3/8 port, and mounting options. The SAIJ also features an upgraded two-piece Y-shaped piston seal.
The external stop screw window is 40 mm, allowing an on-site extend stroke of 410-450 mm. The stop sets end position but is not a load lock; use SAIL or an external rod lock for held loads.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ63X450-40
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ63X450-40 replacement — usually within 7-8 hours.