This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ50X200-40, 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 SIJ50 Double Rod Adjustable Cylinder SIJ50X200-40
The AirTAC SIJ50 Double Rod Adjustable Cylinder SIJ50X200-40 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 200mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ50X200-40, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke200 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAIJ50X200-40
- 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 SIJ50 Double Rod Adjustable Cylinder SIJ50X200-40
The AirTAC SIJ50X200-40 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 50mm bore and 200mm maximum extend stroke. An external stop screw allows you to trim the extend stroke by up to 40mm on-site, yielding a usable 160-200mm stroke range. The direct replacement is the SAIJ50X200-40, matching the interface, force, and mounting.
The SAIJ successor retains the exact specifications but incorporates an upgraded piston seal featuring two Y-shaped one-way elements for lower start-up pressure and longer life. Note this SKU lacks a magnet (-S) and cannot accept a sensor switch. The external stop sets the end position but is not a load lock; the cylinder drifts on air loss, so use an external rod lock or SAIL variant for held loads.
Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X200-40 Technical Specifications
| Model | Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X200-40 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ50X200-40 |
| Bore size | Ø50 mm |
| Stroke | 200 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| 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 1200 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAIJ50X200-40 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
The SAIJ50X200-40 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X200-40
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×200 | 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 SIJ50 Double Rod Adjustable Cylinder SIJ50X200-40 Is Used
Variable Depth Drilling Jig
Trimming the extend stroke by up to 40mm on-site allows a machining fixture to accommodate multiple part thicknesses without re-engineering the entire pneumatic assembly.
Adjustable Carton Flap Folder
Tuning the 160-200mm extend window on the packaging line ensures precise flap alignment for varying box heights, preventing crushing during the sealing process.
Variable Position Diverter Gate
Field-adjusting the stroke end position lets a conveyor sorting gate handle different product widths on the fly, optimizing routing without changing cylinder hardware.
Replacing the Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X200-40 with the SAIJ50X200-40
To replace the discontinued SIJ50X200-40, order the direct replacement SAIJ50X200-40, which preserves the 50mm bore, 200mm nominal stroke, 40mm adjust window, G1/4 port, and ISO 15552 mounting interfaces (Basic, FA, LB, TC). Select the 40mm adjust window when your application requires field-tuning the extend stroke between 160mm and 200mm. Because this non-magnetic SKU cannot accept a sensor switch, add the -S magnet suffix if position detection is needed. For strokes at or above 300mm, carefully manage side-load forces to prevent guide bushing wear. Remember the stop screw only sets end position; it does not hold loads pneumatically.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ50X200-40
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X200-40 FAQ
Yes, the SIJ50X200-40 is discontinued. The direct replacement is the SAIJ50X200-40, which shares the identical ISO 15552 interface, 50mm bore, 200mm stroke, 40mm adjust window, G1/4 port, and mounting options. The SAIJ family also adds an upgraded piston seal for longer life.
The external stop screw has a 40mm window, allowing you to shorten the 200mm extend stroke down to 160mm on-site. The stop sets end position but is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ50X200-40
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ50X200-40 replacement — usually within 7-8 hours.