{"product_id":"ims-b702tch28-5e-praecisionskurv-58-mm","title":"IMS Competition Precision Filter Basket 58 mm Convex H28.5 – B702TCH28.5E","description":"\u003ch1\u003eIMS Competition Precision Filter Basket 58 mm Convex H28.5\u003c\/h1\u003e\n\u003cp\u003eGet a more precise and consistent foundation for your espresso with the \u003cstrong\u003eIMS Competition B702TCH28.5E\u003c\/strong\u003e. Developed for larger double espresso doses, this filter basket combines a cylindrical shape with a convex bottom and 715 precision-manufactured micro-holes.\u003c\/p\u003e\n\u003cp\u003eThe convex bottom directs the brewed espresso toward the center of the basket, making this model particularly suitable for use with a bottomless portafilter.\u003c\/p\u003e\n\u003ch2\u003eConvex bottom for centered flow\u003c\/h2\u003e\n\u003cp\u003eUnlike a traditional flat filter basket, the B702TCH28.5E has a slightly curved base. The shape concentrates the flow toward the middle of the basket, creating a centered stream of espresso.\u003c\/p\u003e\n\u003cp\u003eThe convex construction is designed to:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003eUtilize the entire coffee puck during extraction\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003eGather the flow toward the center of the basket\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003eProvide a clear flow in a bottomless portafilter\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003eSupport drying of the coffee puck\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003eMake the used puck easier to knock out\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003eThe shape of the basket alone cannot prevent channeling. Uniform grinding, proper distribution, and level tamping remain essential.\u003c\/p\u003e\n\u003ch2\u003e715 precision-manufactured holes\u003c\/h2\u003e\n\u003cp\u003eThe basket bottom features 715 holes with a diameter of 0.30 mm. The holes are arranged in a hexagonal pattern over a 49 mm perforated area.\u003c\/p\u003e\n\u003cp\u003eAs part of the IMS Competition series, the perforation is post-processed and calibrated to create a more consistent size and shape for the holes.\u003c\/p\u003e\n\u003cp\u003eThis provides a stable starting point when adjusting:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003eGrind size\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003eDosage\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003eBrew time\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003eYield\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003eBrew ratio\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003eA precision basket can therefore make it easier to replicate a good recipe and identify the effect of individual adjustments.\u003c\/p\u003e\n\u003ch2\u003eLarge capacity due to height\u003c\/h2\u003e\n\u003cp\u003eThe filter basket is 28.5 mm high and is designed for relatively large doses. IMS indicates different capacity ranges depending on the roast level of the coffee:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003eDark roast coffee: approximately 19–22 g\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003eMedium roast coffee: approximately 22–25 g\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003eLight roast coffee: approximately 23–27 g\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003eThe difference is due in part to the fact that light coffee beans typically have a higher density and therefore take up less space at the same weight than dark-roasted beans.\u003c\/p\u003e\n\u003cp\u003eThe dosages are indicative. The correct amount also depends on grind size, coffee density, and the clearance between the coffee puck and the machine's shower screen.\u003c\/p\u003e\n\u003ch2\u003eFor 58 and 58.4 mm tampers\u003c\/h2\u003e\n\u003cp\u003eIMS specifies the filter basket for tampers with a diameter of 58 or 58.4 mm. A snug-fitting tamper helps compress the coffee evenly all the way to the edge of the basket.\u003c\/p\u003e\n\u003cp\u003eThe basket dimensions are:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003eOuter rim: 70 mm\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003eBasket body: 60 mm\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003eHeight: 28.5 mm\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003eRecommended tamper: 58–58.4 mm\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003eThe designation 58 mm does not automatically mean that the basket fits all 58 mm espresso machines. The portafilter must also have the necessary internal diameter and depth.\u003c\/p\u003e\n\u003cp\u003eTherefore, always compare the dimensions with your existing filter basket before purchasing.\u003c\/p\u003e\n\u003ch2\u003eRidgeless construction\u003c\/h2\u003e\n\u003cp\u003eThe B702TCH28.5E is ridgeless and therefore has no external retention groove.\u003c\/p\u003e\n\u003cp\u003eThe smooth exterior makes the basket easier to insert and remove from the portafilter. How firmly it sits depends on the portafilter's spring and construction.\u003c\/p\u003e\n\u003cp\u003eA ridgeless basket can still be held securely by the portafilter spring, but the fit should be checked before use.\u003c\/p\u003e\n\u003ch2\u003eElectropolished surface\u003c\/h2\u003e\n\u003cp\u003eThe filter basket has an electropolished and passivated surface. The treatment reduces microscopic imperfections and creates a smooth surface that is easier to clean.\u003c\/p\u003e\n\u003cp\u003eThe smooth finish helps limit the buildup of coffee oils and fine coffee particles, but the basket must still be cleaned regularly.\u003c\/p\u003e\n\u003ch2\u003eParticularly suitable for bottomless portafilters\u003c\/h2\u003e\n\u003cp\u003eThe convex bottom gathers the espresso toward the center and therefore pairs well with a bottomless portafilter.\u003c\/p\u003e\n\u003cp\u003eA bottomless portafilter also makes it easier to observe:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003eWhether the flow starts evenly\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003eWhether the espresso gathers toward the center\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003eWhether channeling occurs\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003eWhether the tamping is uneven\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003eWhether puck preparation should be adjusted\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003eThe filter basket can also be used in compatible spouted portafilters if there is sufficient space under the basket's convex bottom.\u003c\/p\u003e\n\u003ch2\u003eHow to achieve a good result\u003c\/h2\u003e\n\u003col\u003e\n\n\u003cli\u003e\n\n\u003cp\u003eChoose a starting dose that fits the coffee's roast level.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003eDistribute the ground coffee evenly in the basket.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003eOptionally use a WDT tool to break up clumps.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003eTamp the coffee horizontally with a suitable tamper.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003eCheck that there is space between the puck and the shower screen.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003eBrew the espresso and evaluate the flow, time, and taste.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003eAdjust primarily the grind size while keeping the dosage stable.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ol\u003e\n\u003cp\u003eIt is recommended to start at the lower end of the suggested dosage range. An overfilled basket can cause the coffee puck to hit the brew head and affect water distribution.\u003c\/p\u003e\n\u003ch2\u003eCleaning and maintenance\u003c\/h2\u003e\n\u003cp\u003eKnock out the coffee grounds after brewing and rinse the basket thoroughly with hot water. Check regularly that the 715 holes are not clogged by coffee oils or fine particles.\u003c\/p\u003e\n\u003cp\u003eFor deep cleaning, the basket can be soaked in a suitable cleaning agent for espresso and coffee equipment. Follow the cleaner's instructions and rinse the basket thoroughly with clean water afterward.\u003c\/p\u003e\n\u003cp\u003eAvoid needles, steel brushes, and other sharp tools that can damage or alter the shape of the micro-holes.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cstrong\u003eBrand:\u003c\/strong\u003e IMS\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cstrong\u003eSeries:\u003c\/strong\u003e Competition Convex\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cstrong\u003eModel number:\u003c\/strong\u003e B702TCH28.5E\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cstrong\u003eProduct type:\u003c\/strong\u003e Precision basket for espresso\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cstrong\u003eCapacity:\u003c\/strong\u003e 2–3 cups\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cstrong\u003eHeight:\u003c\/strong\u003e 28.5 mm\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cstrong\u003eOuter rim:\u003c\/strong\u003e 70 mm\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cstrong\u003eBasket body:\u003c\/strong\u003e 60 mm\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cstrong\u003eTamper size:\u003c\/strong\u003e 58–58.4 mm\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cstrong\u003eBottom:\u003c\/strong\u003e Convex\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cstrong\u003eRetention groove:\u003c\/strong\u003e No – ridgeless\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cstrong\u003eNumber of holes:\u003c\/strong\u003e 715\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cstrong\u003eHole diameter:\u003c\/strong\u003e 0.30 mm\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cstrong\u003ePerforated area:\u003c\/strong\u003e 49 mm\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cstrong\u003eHole pattern:\u003c\/strong\u003e Hexagonal\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cstrong\u003eSurface:\u003c\/strong\u003e Electropolished and passivated\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cstrong\u003eSuggested dose, dark roast:\u003c\/strong\u003e 19–22 g\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cstrong\u003eSuggested dose, medium roast:\u003c\/strong\u003e 22–25 g\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cstrong\u003eSuggested dose, light roast:\u003c\/strong\u003e 23–27 g\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cstrong\u003ePortafilter included:\u003c\/strong\u003e No\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cstrong\u003eTamper included:\u003c\/strong\u003e No\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003eThe IMS Competition B702TCH28.5E is an obvious choice for the espresso enthusiast who wants a large, ridgeless, precision basket with a convex bottom, centered flow, and room for larger doses.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eHow much coffee fits in the IMS B702TCH28.5E?\u003c\/h3\u003e\n\u003cp\u003eIMS indicates approximately 19–22 g for dark roast coffee, 22–25 g for medium roast coffee, and 23–27 g for light roast coffee. The optimal dosage also depends on grind size and coffee density.\u003c\/p\u003e\n\u003ch3\u003eWhich tamper fits the basket?\u003c\/h3\u003e\n\u003cp\u003eThe basket is intended for tampers with a diameter of 58 or 58.4 mm. A snug-fitting tamper usually provides the most uniform tamping along the edge of the basket.\u003c\/p\u003e\n\u003ch3\u003eDoes the basket fit all 58 mm espresso machines?\u003c\/h3\u003e\n\u003cp\u003eNo. You must also check the basket's outer rim of 70 mm, the body diameter of 60 mm, and the height of 28.5 mm. Furthermore, the portafilter must have room for the convex bottom.\u003c\/p\u003e\n\u003ch3\u003eWhat does the convex bottom mean?\u003c\/h3\u003e\n\u003cp\u003eThe convex bottom is slightly curved and directs the finished espresso toward the center of the basket. The shape pairs particularly well with a bottomless portafilter.\u003c\/p\u003e\n\u003ch3\u003eWhat does ridgeless mean?\u003c\/h3\u003e\n\u003cp\u003eRidgeless means that the basket does not have an external retention groove. The smooth exterior makes the basket easier to remove, while the portafilter spring can still keep it in place.\u003c\/p\u003e\n\u003ch3\u003eHow many holes does the filter basket have?\u003c\/h3\u003e\n\u003cp\u003eThe basket has 715 precision-manufactured holes with a diameter of 0.30 mm.\u003c\/p\u003e\n\u003ch3\u003eDoes the basket prevent channeling?\u003c\/h3\u003e\n\u003cp\u003eNot on its own. The basket's uniform perforation provides a precise foundation, but correct grind size, distribution, dosage, and level tamping remain essential.\u003c\/p\u003e\n\u003ch3\u003eCan the basket be used in a spouted portafilter?\u003c\/h3\u003e\n\u003cp\u003eYes, if the portafilter has sufficient diameter and depth for the basket's height and convex bottom. Always compare with the dimensions of your current basket.\u003c\/p\u003e\n\u003ch3\u003eAre a portafilter or tamper included?\u003c\/h3\u003e\n\u003cp\u003eNo. The product consists only of the IMS filter basket. Portafilter, tamper, and other espresso equipment are purchased separately.\u003c\/p\u003e","brand":"Brændeholm Risteri","offers":[{"title":"Default Title","offer_id":54275113877847,"sku":null,"price":199.0,"currency_code":"DKK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0926\/0705\/4167\/files\/IMSCompetitionPraecisionskurv58mmConvexH28_5_B702TCH28.5E.jpg?v=1786048026","url":"https:\/\/braendeholmristeri.dk\/en\/products\/ims-b702tch28-5e-praecisionskurv-58-mm","provider":"Brændeholm Risteri","version":"1.0","type":"link"}