Airtac SAIJ50 Adjustable Cylinder SAIJ50AX650-40S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX650-40S 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 SAIJ50AX650-40S
The AirTAC SAIJ50X650-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling a usable travel window of 610 to 650 mm. Delivering 982 N of push force at 0.5 MPa, it integrates an SUS420J2 stainless steel rod and a built-in magnet for position sensing.
This adjustable-stroke design allows fine-tuning of the retract end-position during commissioning without physically swapping the cylinder. The rear adjuster acts purely as a travel stop and does not hold the load without live air pressure, while the extruded aluminum barrel features sensor grooves on both sides for flexible CMSE or DMSE switch mounting.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX650-40S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX650-40S |
|---|---|
| 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 SAIJ50AX650-40S
| 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 SAIJ50AX650-40S Is Used
Variable End-Stop Tuning
Dial in the exact retract distance from 610 to 650 mm during machine setup, eliminating the need to fabricate custom spacer blocks for different product sizes.
Changeover Adjustment
Quickly reconfigure the cylinder stroke on automated lines handling multiple product lengths, using the 40 mm rear screw to fine-tune the final position.
Long-Travel Positioning
Move packages along a conveyor with a 650 mm stroke, using the adjustable stopper to absorb minor variations in package dimensions at the end of the run.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX650-40S the Right Cylinder?
Choose this 50 mm bore when an application requires 982 N of thrust at 0.5 MPa, stepping up from a 40 mm bore that provides 628 N. The 40 mm adjustment range is ideal for product changeovers on a line, letting operators dial in the exact end-stop without adding external mechanical stops. To match this ISO 15552 footprint for a direct replacement, verify the 650 mm stroke, PT tapered port threads, and the -S magnet option.
Because the 650 mm stroke is long, the 20 mm rod diameter should be supported by an external guide to prevent excessive side-loading and premature seal wear. For applications requiring true load-holding without continuous air pressure, consider the SAIL locking cylinder instead, as the SAIJ rear stopper cannot function as a brake.
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 SAIJ50AX650-40S FAQ
At 0.5 MPa operating pressure, this 50 mm bore cylinder provides 982 N of push force and 825 N of pull force. It operates at speeds between 30 and 800 mm/s.
The rear adjuster screw allows you to shorten the effective travel from the nominal 650 mm down to 610 mm. This provides a 40 mm tuning window to set the exact retract end-position without changing the cylinder.
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