Airtac SAIJ50 Adjustable Cylinder SAIJ50BX105-30
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50BX105-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 105mm 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
- Stroke105 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 30 mm
About the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX105-30
The AirTAC SAIJ50X105-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the travel window from 75 to 105 mm during commissioning. Delivering 982 N of push thrust at 0.5 MPa, it integrates a durable SUS304 stainless steel rod and tapered PT ports for pneumatic connection. This adjustable design eliminates the need to swap cylinders or add external stops when dialing in exact end positions.
Unlike fixed-stroke SAI models, this variant uses an external rear screw to set the retract end-stop, acting as a travel limiter rather than a load-holding lock. The extruded aluminum barrel includes sensor grooves on both sides, supporting CMSE reed and DMSE electronic switches if a magnet is added later. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR brackets.
Airtac SAIJ50 Adjustable Cylinder SAIJ50BX105-30 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50BX105-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 105 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 SAIJ50BX105-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×105 | 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 SAIJ50BX105-30 Is Used
Machine Changeover
Dial in the 75-105 mm travel window during product size changes on the line without physically swapping the cylinder or adding external stopper blocks.
End-Position Tuning
Fine-tune the retract end position at commissioning to absorb mechanical tolerances, ensuring precise positioning using the rear adjustment screw.
Variable End Stops
Achieve exact clamping or pressing forces by adjusting the stroke on the fly, relying on the 982 N push thrust at 0.5 MPa to execute the work.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX105-30 the Right Cylinder?
Choose this 50 mm bore when an application requires precise end-position tuning without compromising the 825 N pull force at 0.5 MPa offered by this bore size. If your setup needs less force, stepping down to a 40 mm bore provides 528 N of pull, while stepping up to a 63 mm bore yields 1402 N for heavier loads. The adjustable stroke is ideal for machine changeovers and variable product sizes, whereas a fixed SAI cylinder is preferred for set-and-forget operations.
Because the nominal stroke is 105 mm, an external guide is not strictly necessary, but always account for side loads. Remember that the rear adjuster and air cushions only decelerate the travel end; they do not hold the load without live air. For true load-holding without pressure, consider an SAIL air-released lock, a BSAI clamp-lock, or an external rod lock. This cylinder is dimensionally interchangeable per ISO 15552 standards.
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 SAIJ50BX105-30 FAQ
At 0.5 MPa operating pressure, this 50 mm bore cylinder provides 982 N of push thrust and 825 N of pull thrust. At the maximum pressure of 1.0 MPa, it delivers up to 200 kgf.
The rear adjuster screw allows you to shorten the effective stroke by up to 30 mm, creating a usable travel window of 75 to 105 mm. This mechanism acts as a travel stop to fine-tune the end position and does not lock or hold the load without continuous air pressure.
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