This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ63X75-50S, 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 SIJ63X75-50S
The AirTAC SIJ63 Double Rod Adjustable Cylinder SIJ63X75-50S 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 SAIJ63X75-50S, 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 → SAIJ63X75-50S
- 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 SIJ63X75-50S
The AirTAC SIJ63X75-50S 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 50 mm on-site, yielding a usable 25-75 mm extend window from the 75 mm nominal maximum. Because SIJ is end-of-life, the direct replacement is the SAIJ63X75-50S, retaining the same interface, force, and adjustability.
The SAIJ upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure and longer life. Remember the stop screw sets end position only; it is not a load lock, so use an external rod lock or SAIL/BSAI variant for held loads. The -S suffix provides a piston magnet for legacy CS1-B/DS1-B switches.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X75-50S Technical Specifications
| Model | Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X75-50S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ63X75-50S |
| 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 SAIJ63X75-50S 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 SAIJ63X75-50S 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 SIJ63X75-50S
| 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 SIJ63X75-50S Is Used
Press Fit Tuning
Needs field stroke tuning to dial in the exact 25-75 mm extend position for seating bearings without changing the fixed 75 mm cylinder body.
Adjustable End Stop Pusher
Uses the external stop screw to set precise 25-75 mm extend endpoints for positioning pallets, allowing quick changes without adding physical spacers.
Replacing the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X75-50S with the SAIJ63X75-50S
To replace the discontinued SIJ63X75-50S, order the direct replacement SAIJ63X75-50S, keeping the 63 mm bore, 75 mm stroke, 50 mm adjust window, and G3/8 port. Choose the 50 mm adjust window if your field stroke tuning requires trimming the 75 mm extend by up to 50 mm. Mounting reuses ISO 15552 interface dimensions for Basic, FA, LB, or TC brackets. The -S suffix includes a piston magnet for position sensing. Because the 75 mm stroke is under 300 mm, side-load rod deflection is minimal.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ63X75-50S
- ✓ 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 SIJ63X75-50S FAQ
Yes, the SIJ63X75-50S is discontinued. The direct replacement is the SAIJ63X75-50S, which matches the 63 mm bore, 75 mm stroke, 50 mm adjust window, G3/8 port, and ISO 15552 mounting. The SAIJ uses an upgraded piston seal and current AirTAC switches for the -S magnet.
The external stop screw window is 50 mm, allowing you to trim the 75 mm nominal extend stroke down to 25 mm on-site. The stop sets position only and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ63X75-50S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ63X75-50S replacement — usually within 7-8 hours.