This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ63X75-20S, 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 SIJ63X75-20S
The AirTAC SIJ63 Double Rod Adjustable Cylinder SIJ63X75-20S 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 SAIJ63X75-20S, 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 → SAIJ63X75-20S
- 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 SIJ63X75-20S
The AirTAC SIJ63X75-20S is a double-acting double-rod ISO 15552 adjustable-stroke cylinder, now discontinued. Its external stop screw lets you trim the extend stroke by up to 20mm on-site, giving a usable 55-75mm range from the 75mm nominal maximum. The direct replacement is the SAIJ63X75-20S, matching the interface, force, and mounting.
The SAIJ upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The stop screw sets end position but is not a load lock; use an external rod lock or SAIL/BSAI variant for held loads. This -S model includes a piston magnet for legacy CS1-B/DS1-B switches.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X75-20S Technical Specifications
| Model | Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X75-20S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ63X75-20S |
| 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 SAIJ63X75-20S 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 SAIJ63X75-20S 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 SIJ63X75-20S
| 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 SIJ63X75-20S Is Used
Forming Press Stops
Adjustable end-position tuning allows operators to dial in precise 55-75mm forming depths on-site without swapping cylinders.
Variable Length Diverters
Stroke-trim flexibility accommodates changing package sizes on a sorting line by fine-tuning the actuator reach up to 20mm.
Prototype Tooling Setup
Engineers can micro-adjust the extend stroke during R&D fixture validation to find the optimal clamping distance.
Replacing the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X75-20S with the SAIJ63X75-20S
To replace the discontinued SIJ63X75-20S, order the direct replacement SAIJ63X75-20S, retaining your FA, LB, or TC mounts. Choose the 20mm adjust window if your application needs field tuning between 55mm and 75mm. The -S suffix ensures a piston magnet for legacy CS1-B/DS1-B switches (current AirTAC switches fit the SAIJ). As the 75mm stroke is under 300mm, side-load guide concerns are minimal. Remember the stop screw is not a brake; for load holding on air loss, specify a SAIL/BSAI lock variant or external check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ63X75-20S
- ✓ 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 SIJ63X75-20S FAQ
Yes, the SIJ63X75-20S is discontinued. The direct replacement is the SAIJ63X75-20S, offering the same ISO 15552 interface, 63mm bore, 75mm stroke, 20mm adjust window, G3/8 port, and mounting compatibility. The SAIJ 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 20mm on-site, yielding a usable 55-75mm stroke. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ63X75-20S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ63X75-20S replacement — usually within 7-8 hours.