This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ63X75-20, 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 SIJ63X75-20
The AirTAC SIJ63 Double Rod Adjustable Cylinder SIJ63X75-20 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 SAIJ63X75-20, 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 → SAIJ63X75-20
- 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 SIJ63X75-20
The AirTAC SIJ63X75-20 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. An external stop screw lets you trim the extend stroke by up to 20 mm on-site, giving a usable 55-75 mm forward travel out of the 75 mm nominal maximum.
Because this SIJ model is end-of-life, the direct replacement is the SAIJ63X75-20, preserving the same ISO 15552 mounting interface, bore, and force. The SAIJ upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure and longer life. As a plain non-magnetic cylinder (no -S suffix), this SKU cannot accept a magnetic switch. The stop screw sets the end position but is not a load lock; for held loads, specify an external rod lock or the SAIL/BSAI variants.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X75-20 Technical Specifications
| Model | Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X75-20 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ63X75-20 |
| 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 SAIJ63X75-20 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 SAIJ63X75-20 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 SIJ63X75-20
| 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 SIJ63X75-20 Is Used
Press Fit Tuning
Dialing in the exact insertion depth of a bearing press where 55 to 75 mm of travel is required, using the 20 mm stop screw to compensate for fixture stack-up tolerances.
Diverter Gate Adjustment
Positioning a sorting flap on a packaging line, allowing maintenance to shorten the extend stroke by up to 20 mm on-site without machining new hard stops.
Carton Stop Positioning
Actuating a physical stop block for varying box sizes, using the adjustable end position to tune the 75 mm maximum stroke precisely to the conveyor profile.
Replacing the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X75-20 with the SAIJ63X75-20
To replace the discontinued SIJ63X75-20, order the direct replacement SAIJ63X75-20, which retains the 20 mm adjust window, 75 mm nominal stroke, and G3/8 port. Choose the 20 mm adjust window if your final end position needs on-site tuning between 55 and 75 mm. Mounting hardware (FA, LB, TC) reuses standard ISO 15552 interface dimensions. Since this SKU lacks the -S suffix, it cannot take a sensor; for position feedback you must add external switches or select a -S model. For stroke lengths at or above 300 mm, verify your side-load limits to prevent guide wear. Remember the external stop sets end position but does not lock the load on air loss.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ63X75-20
- ✓ 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 SIJ63X75-20 FAQ
Yes, the SIJ63X75-20 is discontinued. The direct replacement is the SAIJ63X75-20. It shares the same ISO 15552 interface, 63 mm bore, 75 mm stroke, 20 mm adjust window, G3/8 port, and mounting options, while adding an upgraded two Y-shaped one-way piston seal.
The external stop screw provides a 20 mm adjustment window, allowing you to trim the extend stroke from the 75 mm maximum down to 55 mm on-site.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ63X75-20
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ63X75-20 replacement — usually within 7-8 hours.