This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ63X75-50N, 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 SIJ63X75-50N
The AirTAC SIJ63 Double Rod Adjustable Cylinder SIJ63X75-50N 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 SAIJ63X75-50N, 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 → SAIJ63X75-50N
- 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 SIJ63X75-50N
The AirTAC SIJ63X75-50N is a double-acting double-rod ISO 15552 adjustable-stroke cylinder, now discontinued. The direct replacement is the SAIJ63X75-50N, matching the 63 mm bore, G3/8 port, and 75 mm nominal stroke. 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. The stop sets the end position but is not a load lock. This NBR-sealed unit operates from -20 to +70 C.
The SAIJ successor adopts an upgraded two-piece Y-shaped piston seal for lower start-up pressure. This SKU lacks a magnet (-N only), so it cannot accept magnetic switches.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X75-50N Technical Specifications
| Model | Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X75-50N |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ63X75-50N |
| 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 SAIJ63X75-50N 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 SAIJ63X75-50N 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 SIJ63X75-50N
| 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 SIJ63X75-50N Is Used
Variable Depth Drilling
A machining fixture needing field stroke tuning to accommodate multiple part heights without swapping the entire actuator.
Adjustable Diverter Arm
A packaging line diverter requiring precise extend stop positioning to route different carton widths on the fly.
Tiered Pusher Station
A warehouse pusher that trims its extend stroke by up to 50 mm on-site to push varying pallet depths safely.
Replacing the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X75-50N with the SAIJ63X75-50N
To replace the discontinued SIJ63X75-50N, order the direct replacement SAIJ63X75-50N, reusing your existing FA, LB, or TC ISO 15552 mounts. The 50 mm adjust window is ideal here, covering the full 25-75 mm extend range. Because this is a non-magnetic SKU, you cannot mount legacy CS1-B/DS1-B sensors; if sensing is required, select an SAIJ-S variant. For strokes at or above 300 mm, verify side-load limits to prevent guide wear. Remember that a plain cylinder does not hold loads on air loss; for held loads use an external rod lock, a pilot-operated check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ63X75-50N
- ✓ 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 SIJ63X75-50N FAQ
Yes, the SIJ63X75-50N is discontinued. The direct replacement is the SAIJ63X75-50N. It shares the identical ISO 15552 interface, 63 mm bore, 75 mm stroke, 50 mm adjust window, G3/8 port, and mounting options. The SAIJ family also features an upgraded piston seal for longer life.
The external stop screw allows you to shorten the extend stroke by up to 50 mm on-site, giving a usable 25-75 mm extend window. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ63X75-50N
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ63X75-50N replacement — usually within 7-8 hours.