Airtac SAIJ50 Adjustable Cylinder SAIJ50AX650-20S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX650-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 650mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ50 mm
- Stroke650 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 30 mm
- 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 SAIJ50 Adjustable Cylinder SAIJ50AX650-20S
The AirTAC SAIJ50X650-20-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 650 mm stroke that can be fine-tuned down by 20 mm, giving you a precise 630-650 mm usable travel window during commissioning. Delivering 982 N of push force at 0.5 MPa, it handles mid-range actuation tasks with ease.
This variant includes an SUS420J2 stainless steel rod (code A) for improved corrosion resistance and is equipped with a magnet (-S) for use with AirTAC CMSE reed and DMSE electronic sensors. The extruded aluminum barrel features sensor grooves on both sides, and the PT tapered ports ensure a tight pneumatic seal.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX650-20S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX650-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 650 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 stroke | Up to 1200 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / 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 | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ50 Adjustable Cylinder SAIJ50AX650-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×650 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX650-20S Is Used
Product Size Changeovers
Dial in the 630-650 mm end position on packaging lines when switching between different carton lengths, eliminating the need for mechanical spacer changes.
Machine Setup Fine-Tuning
Trim the stroke by up to 20 mm during initial commissioning to perfectly time the contact point without repositioning the cylinder's mounting hardware.
Adjustable Diverters
Control diverter arms on material handling conveyors where the required reach varies slightly based on product width or routing logic.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX650-20S the Right Cylinder?
Choose this 50 mm bore when you need more force than a 40 mm cylinder (which provides 628 N push at 0.5 MPa) but want a more compact footprint than a 63 mm unit (1559 N). The adjustable 630-650 mm travel window is perfect for machines processing variable product sizes, allowing you to shift the end-stop without swapping cylinders or adding external stops. Because the stroke is 650 mm, an external guide is recommended to prevent excessive side-loading on the rod.
For dimensionally interchangeable ISO 15552 replacements, match the 50 mm bore, 650 mm stroke, 20 mm adjustment, PT ports, and -S magnet. Note that the rear adjuster acts only as a travel stop and does not hold the load without live air; for positive load-holding without pressure, consider an AirTAC SAIL or BSAI lock cylinder.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX650-20S FAQ
At a standard 0.5 MPa operating pressure, this 50 mm bore cylinder produces 982 N of push force and 825 N of pull force. At its maximum 1.0 MPa pressure, it can deliver up to 200 kgf.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective travel from the nominal 650 mm down to 630 mm. This creates a 630-650 mm adjustable window for fine-tuning the retract end position without changing the cylinder.
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