This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ63X350-75, 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 SIJ63X350-75
The AirTAC SIJ63 Double Rod Adjustable Cylinder SIJ63X350-75 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 350mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ63X350-75, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke350 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAIJ63X350-75
- 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 SIJ63X350-75
The AirTAC SIJ63X350-75 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 63mm bore and 350mm nominal stroke. An external stop screw lets you trim the extend stroke by up to 75mm on-site, yielding a usable 275-350mm extension. The stop sets the end position; it is not a load lock.
The direct replacement is the SAIJ63X350-75, retaining the same interface, force, and 30mm adjustable cushions. The SAIJ upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. This SKU lacks a magnet (-S), so it cannot take a switch.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X350-75 Technical Specifications
| Model | Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X350-75 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ63X350-75 |
| Bore size | Ø63 mm |
| Stroke | 350 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 SAIJ63X350-75 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 SAIJ63X350-75 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 SIJ63X350-75
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×350 | 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 SIJ63X350-75 Is Used
Variable Stroke Pressing
Allows operators to trim the extend stroke by up to 75mm on-site to accommodate material thickness variations without re-mounting the actuator.
Adjustable Transfer Stops
Provides field-tunable end positions for diverter arms handling mixed product sizes on a single line, setting the exact 275-350mm extend point.
Custom Packaging Flaps
Enables quick stroke shortening for different carton depths, ensuring precise contact without over-travel during the folding sequence.
Replacing the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X350-75 with the SAIJ63X350-75
To replace the discontinued SIJ63X350-75, use the SAIJ63X350-75 direct; the FA, LB, and TC ISO 15552 mounts transfer directly. Choose the 75mm adjust window if you need on-site tuning from 275-350mm; for fixed stops, a standard SAI cylinder is simpler. Because this SKU has no -S magnet, it cannot support legacy CS1-B/DS1-B sensors. For the 350mm stroke, use external guides to manage side-load and rod-bending. A plain cylinder drifts on air loss; for held loads use an external rod lock or SAIL/BSAI variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ63X350-75
- ✓ 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 SIJ63X350-75 FAQ
Yes, the SIJ63X350-75 is discontinued. The direct replacement is the SAIJ63X350-75, which shares the identical ISO 15552 interface, 350mm stroke, 75mm adjust window, G3/8 port, and mounting options.
The external stop screw provides a 75mm adjustment window, shortening the extend stroke from the 350mm maximum down to 275mm. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ63X350-75
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ63X350-75 replacement — usually within 7-8 hours.