Airtac SAIJ50 Adjustable Cylinder SAIJ50BX650-50
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50BX650-50 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 SAIJ50BX650-50
The AirTAC SAIJ50X650-50 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to fine-tune the retract end position during commissioning. With a nominal 650 mm stroke and a 50 mm adjustment range, it provides a usable travel window of 600 to 650 mm without requiring external stops. It delivers 982 N of push force at 0.5 MPa and operates at speeds between 30 and 800 mm/s.
This specific SKU features a SUS304 stainless steel rod for superior corrosion resistance and utilizes a PT tapered port thread. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting. It supports the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR options.
Airtac SAIJ50 Adjustable Cylinder SAIJ50BX650-50 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50BX650-50 |
|---|---|
| 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 SAIJ50BX650-50
| 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 SAIJ50BX650-50 Is Used
Machine Changeover
Dial in the exact 600-650 mm retract end-stop during product size changes on a packaging line without physically swapping the cylinder.
Variable End Stops
Accommodate varying material lengths on a conveyor by adjusting the rear stopper to tune the effective travel window on the fly.
Commissioning Tuning
Fine-tune the final end position during machine setup to perfect sensor triggering and mechanical alignment without adding external stops.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX650-50 the Right Cylinder?
Choose this 50 mm bore when you need precise retract-position tuning on a long-stroke machine, avoiding the need to swap cylinders for product changeovers. If your application requires less force, the 40 mm bore offers 628 N at 0.5 MPa; for heavier loads, the 63 mm bore provides 1559 N. For fixed travel without an adjusting screw, the standard SAI cylinder is the alternative.
Because the 650 mm stroke is quite long, an external guide is recommended to handle side loads and prevent rod deflection. Note that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true drop-pressure load holding, consider the SAIL or BSAI series. This model is dimensionally interchangeable per ISO 15552.
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 SAIJ50BX650-50 FAQ
At 0.5 MPa, this 50 mm bore cylinder provides 982 N of push force and 825 N of pull force. At 0.7 MPa, the push force increases to 1374 N.
The rear adjuster screw allows you to shorten the effective stroke by up to 50 mm. This creates a usable travel window of 600 to 650 mm, enabling fine end-position tuning at commissioning.
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