This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ63X50-40, 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 SIJ63X50-40
The AirTAC SIJ63 Double Rod Adjustable Cylinder SIJ63X50-40 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 SAIJ63X50-40, 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 → SAIJ63X50-40
- 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 SIJ63X50-40
The AirTAC SIJ63X50-40 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 63mm bore and 50mm maximum stroke. An external stop screw lets you trim the extend stroke by up to 40mm on-site, yielding a usable 10-50mm window. The direct replacement is the SAIJ63X50-40, sharing the same interface, force, and mounting.
The SAIJ upgrade utilizes a two Y-shaped one-way piston seal for lower start-up pressure and longer life. The external stop sets end position but is not a load lock; use SAIL or BSAI for held loads.
Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X50-40 Technical Specifications
| Model | Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X50-40 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ63X50-40 |
| 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 SAIJ63X50-40 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 SAIJ63X50-40 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 SIJ63X50-40
| 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 SIJ63X50-40 Is Used
Press Fit Tuning
Adjusting the extend stop on-site by up to 40mm allows operators to dial in the exact insertion depth for pressing bearings without swapping cylinders.
Divertor Gate Adjustment
Tuning the extend stroke from 10 to 50mm accommodates varying package sizes on a conveyor line, ensuring the gate diverts items accurately.
Clamp Positioning
Trimming the extend stroke provides precise clamping contact on irregular workpieces, preventing deformation while maintaining a secure hold.
Replacing the Airtac SIJ63 Double Rod Adjustable Cylinder SIJ63X50-40 with the SAIJ63X50-40
To replace the discontinued SIJ63X50-40, map directly to the SAIJ63X50-40 (insert A after the leading S), retaining the 63mm bore, 50mm nominal stroke, 40mm adjust window, and G3/8 port. Choose the 40mm adjust window if you need to fine-tune the extend end-position on-site. Mounting options include FA, LB, and TC. This SKU lacks the -S magnet and cannot take a magnetic switch; for sensing, select a -S model (legacy CS1-B/DS1-B accuracy). Since the stroke is under 300mm, standard side-load limits apply without special derating.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ63X50-40
- ✓ 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 SIJ63X50-40 FAQ
Yes, the SIJ63X50-40 is discontinued. The direct replacement is the SAIJ63X50-40, which shares the same ISO 15552 interface, 63mm bore, 50mm stroke, 40mm adjust window, and G3/8 port.
The external stop screw provides a 40mm adjustment window, allowing the extend stroke to be shortened from the 50mm maximum down to 10mm on-site.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ63X50-40
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ63X50-40 replacement — usually within 7-8 hours.