This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ63X50-40S, 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 SIJ63X50-40S
The AirTAC SIJ63 Double Rod Adjustable Cylinder SIJ63X50-40S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 50mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ63X50-40S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke50 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAIJ63X50-40S
- 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 SIJ63X50-40S
The AirTAC SIJ63X50-40S is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. The external stop screw lets you trim the extend stroke by up to 40mm on-site, giving a usable 10-50mm range. The direct replacement is the SAIJ63X50-40S, matching the interface, force, and mounting.
The SAIJ upgrade uses an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The -S suffix means a piston magnet is present for legacy CS1-B/DS1-B switches. The stop sets end position but is not a load lock; use SAIL/BSAI or an external rod lock for held loads.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X50-40S Technical Specifications
| Model | Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X50-40S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ63X50-40S |
| Bore size | Ø63 mm |
| Stroke | 50 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 SAIJ63X50-40S 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 SAIJ63X50-40S 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 SIJ63X50-40S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×50 | 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 SIJ63X50-40S Is Used
Variable Stroke Clamping
Adjustable end-position clamping of cast parts where raw stock thickness varies, using the 40mm trim window to accommodate different material widths on the fly.
Sorting Diverter Arms
Pneumatic diverters on a packaging line that require field stroke tuning to route different carton sizes without repositioning the entire cylinder assembly.
Prototype Press Fit
Benchtop press operations needing precise extend stroke adjustment during R&D, allowing engineers to dial in the exact 10-50mm insertion depth per component.
Replacing the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X50-40S with the SAIJ63X50-40S
To replace the discontinued SIJ63X50-40S, order the exact direct replacement SAIJ63X50-40S. Choose the 40mm adjust window when you need to trim the extend stroke by up to 40mm on-site (usable 10-50mm). Mounting options include FA, LB, and TC. The -S suffix provides a piston magnet for legacy CS1-B/DS1-B switches. For stroke lengths >=300mm, verify side-load limits to prevent rod distortion.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ63X50-40S
- ✓ 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 SIJ63X50-40S FAQ
Yes, the SIJ63X50-40S is discontinued. The direct replacement is the SAIJ63X50-40S. It shares the same ISO 15552 interface, 63mm bore, 50mm nominal stroke, 40mm adjust window, G3/8 port, and mounting options. The SAIJ family also adds upgraded piston seals and SAIL/BSAI lock variants.
The theoretical max is 318kgf at 1.0MPa. The external stop screw has a 40mm window, allowing you to shorten the extend stroke from the 50mm maximum down to 10mm. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ63X50-40S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ63X50-40S replacement — usually within 7-8 hours.