This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ63X40-30S, 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 SIJ63X40-30S
The AirTAC SIJ63 Double Rod Adjustable Cylinder SIJ63X40-30S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 40mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ63X40-30S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke40 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAIJ63X40-30S
- 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 SIJ63X40-30S
The AirTAC SIJ63X40-30S is a double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 63 mm bore, G3/8 port, and a 40 mm nominal extend stroke. An external stop screw lets you trim the extend stroke by up to 30 mm on-site, yielding a usable 10-40 mm window. This SIJ model is discontinued; the direct replacement is the SAIJ63X40-30S, retaining the same interface, force, and mounting. The stop sets the end position but is not a load lock.
The SAIJ upgrade uses a two Y-shaped one-way piston seal for low start-up pressure, and the SAI family adds SAIL and BSAI lock variants the SI line lacked.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X40-30S Technical Specifications
| Model | Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X40-30S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ63X40-30S |
| Bore size | Ø63 mm |
| Stroke | 40 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 SAIJ63X40-30S 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 SAIJ63X40-30S 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 SIJ63X40-30S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×40 | 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 SIJ63X40-30S Is Used
Multi-Position Clamping
Adjustable end-position tuning allows a single actuator to clamp parts of varying widths on the same fixture without swapping mechanical stops.
Variable Length Diverter
On-site stroke trimming lets a diverting gate accommodate different package lengths on a packaging line, ensuring precise contact without reprogramming.
Calibrated Press Fit
Fine-tune the extend stroke by up to 30 mm to set exact insertion depths for pins or bushings during assembly, compensating for material tolerances.
Replacing the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X40-30S with the SAIJ63X40-30S
To replace the discontinued SIJ63X40-30S, order the direct replacement SAIJ63X40-30S, reusing your FA, LB, or TC ISO 15552 mounts. Choose the 30 mm adjust window when you need on-site end-position tuning between 10 and 40 mm. The -S suffix provides a piston magnet for legacy CS1-B/DS1-B switches (SAIJ uses current switches). For stroke lengths over 300 mm, verify side-load limits. The external stop is not a lock; for held loads use SAIL/BSAI or an external rod lock.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ63X40-30S
- ✓ 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 SIJ63X40-30S FAQ
Yes, the SIJ63X40-30S is discontinued. The direct replacement is the SAIJ63X40-30S. It shares the same ISO 15552 interface, 63 mm bore, 40 mm nominal stroke, 30 mm adjust window, G3/8 port, and mounting options. The SAIJ features an upgraded two Y-shaped one-way piston seal for longer life and lower start-up pressure.
The external stop screw window is 30 mm, allowing you to shorten the 40 mm nominal extend stroke down to 10 mm on-site. The stop sets end position and does not hold loads; use an external rod lock for load holding.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ63X40-30S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ63X40-30S replacement — usually within 7-8 hours.