Shimano Stella SW D Spinning Reels

The Infinity Drive structure is a more advanced version of the conventional X-SHIP structure that created exceptionally light winding. The main shaft, which had previously been supported by the pinion gear, is now supported by a new and unique low-friction bushing that significantly decreases frictional resistance. In addition, the main shaft has undergone a proprietary surface treatment and special processing to drastically reduce rotational torque, constructing a reel that can actively wind even under heavy loads.

Advancements in manufacturing technology and gear tooth design improve the surface contact and meshing between the drive gear and pinion gear. This revolutionary design efficiently distributes the load placed on the gear tooth surface across a wider area to prevent damage from stress points while significantly improving overall gear durability.

Each washer is made of metal and carbon. Larger diameter drag washers have been installed on both the top and bottom sides of the spool. As a result, smooth and stable drag performance has been enhanced by improving heat resistance and durability.

The Heatsink Drag is a revolutionary structure located at the bottom of the spool that helps achieve overwhelming drag performance and improved durability. The Heatsink Drag dissipates heat outside of the spool by about 50% to reduce the drag-force drop that is caused by friction and heat. To further improve performance, the Heat Insulation Sheet dampens the heat flowing to the line on the spool and reduces line temperature by 30% for increased dependability during long fights.

InfinityLoop technology delivers exceptional casting performance by drastically reducing friction on the line leaving the spool. Advancements in the internal structure and design extend the spool's oscillation to enable the spool to move up and down at an extremely low speed. This technology creates a precise winding pattern with less overlap that significantly reduces friction as the line leaves the spool during a cast. The result is smooth and exceptional casting performance, especially of light lures.

The flexible polymer fin is installed near the line roller. This maintains line tension to reduce sagging and prevents the line from falling off the bottom of the spool or wrapping around the spool in an uneven manner.