This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ63X75-30S, 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 SIJ63X75-30S
The AirTAC SIJ63 Double Rod Adjustable Cylinder SIJ63X75-30S 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 SAIJ63X75-30S, 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 → SAIJ63X75-30S
- 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 SIJ63X75-30S
The AirTAC SIJ63X75-30S is a double-acting double-rod ISO 15552 adjustable-stroke cylinder, now discontinued and replaced by the direct replacement SAIJ63X75-30S. The external stop screw lets you trim the extend stroke by up to 30 mm on-site, yielding a usable 45-75 mm stroke. It features a G3/8 port, M16x1.5 rod thread, and 30 mm adjustable cushions.
The SAIJ upgrade retains the exact interface and force but adds an upgraded piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life. The stop screw sets end position but is not a load lock; for held loads use an external rod lock or the SAIL/BSAI variants.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X75-30S Technical Specifications
| Model | Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X75-30S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ63X75-30S |
| 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 SAIJ63X75-30S 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 SAIJ63X75-30S 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 SIJ63X75-30S
| 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 SIJ63X75-30S Is Used
Variable Pitch Pushing
Feeding different length billets on a single line by dialing the extend stroke from 45 to 75 mm without changing the cylinder.
Adjustable Transfer Stops
Actuating transfer gates where the exact end position must be fine-tuned on-site to match varying package widths.
Prototyping Jigs
R&D assembly fixtures requiring iterative end-position adjustments to dial in the exact clamping distance.
Replacing the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X75-30S with the SAIJ63X75-30S
To replace the discontinued SIJ63X75-30S, order the direct replacement SAIJ63X75-30S, keeping the 75 mm nominal stroke and 30 mm adjust window. Size both ways using 0.5 MPa push force: the 50 mm bore gives 982 N, while the 80 mm gives 2513 N. Choose the 30 mm adjust window if you need precise 45-75 mm extend tuning. Reuse FA, LB, or TC ISO 15552 mounts. The -S suffix provides a piston magnet for CS1-B/DS1-B switches (the SAIJ uses current switches). Since the 75 mm stroke is under 300 mm, side-load lever arm stress is minimal. The stop screw sets position, not a lock; for load holding on air loss, use an external rod lock.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ63X75-30S
- ✓ 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 SIJ63X75-30S FAQ
Yes, the SIJ63X75-30S is discontinued. The direct replacement is the SAIJ63X75-30S, sharing the same ISO 15552 interface, 63 mm bore, 75 mm stroke, 30 mm adjust window, G3/8 port, and mounting options.
The external stop screw provides a 30 mm adjustment window, allowing you to trim the extend stroke from 75 mm down to 45 mm on-site.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ63X75-30S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ63X75-30S replacement — usually within 7-8 hours.