High-tension bobbin case for Janome Memory Craft models Part number 846652504 (846-652-504) Key benefits - Twice the tension of the standard red-marked bobbin case, enabling tighter control when the bobbin thread is finer than the needle thread - Helps prevent the bobbin thread from slipping to the top of the work during embroidery - Designed to maintain stitch balance when the bobbin thread is not Janome blister-packed pre-wound What this means for you - Clear improvement in embroidery quality when using finer bobbin thread, reducing thread show-through and puckering - Provides an easy option to adjust tension without changing needle or fabric settings - Can be swapped with the standard red-marked case to tailor performance to your project Compatibility and specifications - Compatible with Janome Memory Craft models - Part number: 846652504 (846-652-504) - High-tension configuration offers twice the tension of the standard bobbin case (the standard case is red-marked) When to use - Use this high-tension bobbin case whenever the bobbin thread is finer than the needle thread to prevent the bobbin thread from drifting to the top of the weave - During normal embroidery, if the bobbin thread is not Janome blister-packed pre-wound, it is recommended to use this high-tension bobbin case - Use the standard (red-marked) bobbin case when sewing lace designs or quilting in the hoop Use scenarios - Scenario 1: You are embroidering a design using a finer bobbin thread than the needle thread. Install the high-tension bobbin case to maintain stitch balance and reduce bobbin thread visibility on the surface. - Scenario 2: You are working with a non-Janome blister-packed pre-wound bobbin thread during normal embroidery. The high-tension case helps control bobbin thread tension for consistent results. - Scenario 3: You are sewing lace designs or quilting in the hoop. Switch to the standard red-marked bobbin case for optimal balance and performance on these projects Notes - This description reflects the product as specified: high-tension bobbin case with Part 846652504 for Janome Memory Craft models, offering twice the tension of the standard red-marked case, with explicit guidance on when to use high tension versus standard tension for different project types.