This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ63X75-50, 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 SIJ63X75-50
The AirTAC SIJ63 Double Rod Adjustable Cylinder SIJ63X75-50 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 75mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ63X75-50, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke75 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAIJ63X75-50
- 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 SIJ63X75-50
The AirTAC SIJ63X75-50 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. The external stop screw lets you trim the extend stroke by up to 50mm on-site, giving a usable 25-75mm extension. It features a 20mm rod, M16x1.5 thread, and G3/8 port.
The direct replacement is the SAIJ63X75-50, matching the bore, stroke, force, port, and mounting. The SAIJ upgrade uses a two Y-shaped one-way piston seal for lower start-up pressure and longer life. The stop screw sets end position but is not a load lock; use SAIL or BSAI for held loads.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X75-50 Technical Specifications
| Model | Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X75-50 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ63X75-50 |
| Bore size | Ø63 mm |
| Stroke | 75 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 SAIJ63X75-50 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 SAIJ63X75-50 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 SIJ63X75-50
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×75 | 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 SIJ63X75-50 Is Used
Adjustable Transfer Stops
Sortation lines can alter the 75mm nominal extend down to 25mm on the fly to accommodate varying package heights while reusing standard ISO 15552 TC mounts.
Tunable Sealing Heads
Packaging equipment can fine-tune the downstroke end position to prevent crushing delicate containers, relying on the external stop screw to set the exact 25-75mm extension.
Replacing the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X75-50 with the SAIJ63X75-50
To replace the discontinued SIJ63X75-50, order the direct replacement SAIJ63X75-50, reusing your ISO 15552 FA, LB, or TC mounts. The 50mm adjust window allows field tuning the extend stroke down to 25mm. This SKU lacks a -S magnet and cannot take a magnetic switch. Because the 75mm stroke is under 300mm, side-load wear is minimal. The stop screw only sets end position and does not lock; for load holding on air loss, specify an external rod lock or pilot-operated check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ63X75-50
- ✓ 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 SIJ63X75-50 FAQ
Yes, the SIJ63X75-50 is discontinued. The direct replacement is the SAIJ63X75-50. It shares the identical 63mm bore, 75mm stroke, 50mm adjust window, G3/8 port, and ISO 15552 mounting interface. The SAIJ family also features an upgraded two Y-shaped one-way piston seal for longer life.
The external stop screw allows you to trim the extend stroke by up to 50mm on-site, yielding a usable 25-75mm extension. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ63X75-50
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ63X75-50 replacement — usually within 7-8 hours.