{"product_id":"ket-mr137-mr137zz-metric-miniature-ball-bearing-7x13x4mm-high-speed-precision-micro-bearing","title":"KET MR137 \/ MR137ZZ Metric Miniature Ball Bearing (7x13x4mm) - High-Speed Precision Micro Bearing","description":"\u003cp\u003e\u003cb\u003eProduct Description:\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eCore Selling Points\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eExact Metric Specifications:\u003c\/b\u003e Precision engineered with a 7 mm inner diameter and a 13 mm outer diameter, specifically designed for seamless integration into global metric-based mechanical assemblies.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eExtreme High-Speed Stability:\u003c\/b\u003e Capable of reaching up to 48,000 RPM with oil lubrication and 40,000 RPM with grease, ensuring flawless operational stability under rapid rotational stress.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eReliable Load Capacity:\u003c\/b\u003e Delivers a robust 540 N basic dynamic load rating and 276 N static load rating, providing excellent durability for compact high-stress micro-applications.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eFactory-Direct Supply:\u003c\/b\u003e Manufactured by Ningbo Kexiang Bearing Technology Co., Ltd. with a robust annual capacity of 100 million sets, securing highly competitive B2B wholesale pricing for global procurement.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eDetailed Overview\u003c\/b\u003e The KET MR137 series deep groove ball bearing is a premium ultra-precision component belonging to our specialized Metric Miniature Series. Established in 2008 in Ningbo, Zhejiang Province, our highly automated manufacturing facility operates under the internationally registered trademark \"KET,\" supplying world-class bearings to global OEM markets. The MR137 model provides the ultimate balance of a compact 7 mm shaft size and incredible rotational speed. It delivers true-to-design dimensional exactness with every production batch for clients utilizing strict metric engineering standards.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eExact Technical Specifications\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eBrand:\u003c\/b\u003e KET\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eModel Variants:\u003c\/b\u003e MR137 (Open Type) \/ MR137ZZ (Shielded Type)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eInner Diameter (d):\u003c\/b\u003e 7 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eOuter Diameter (D):\u003c\/b\u003e 13 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eWidth \/ Thickness (B\/B1):\u003c\/b\u003e 3 mm (Open) \/ 4 mm (Shielded)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eChamfer (r):\u003c\/b\u003e 0.2 mm (Open) \/ 0.15 mm (Shielded)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eBasic Dynamic Load Rating (Cr):\u003c\/b\u003e 540 N\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eBasic Static Load Rating (Cor):\u003c\/b\u003e 276 N\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eLimiting Speed (Grease Lubrication):\u003c\/b\u003e Up to 40,000 RPM\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eLimiting Speed (Oil Lubrication):\u003c\/b\u003e Up to 48,000 RPM\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003ePrimary Industrial Applications\u003c\/b\u003e The KET Metric Miniature Series is highly versatile and globally trusted by precision engineers. Featuring an industry-standard 7 mm bore profile, the MR137 bearing is specifically ideal for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eHigh-speed industrial micro motors, precision cooling fans, and delicate robotic actuators.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRemote control UAVs (Drones), advanced RC models, and aerospace micro-mechanisms.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAdvanced medical equipment, scientific testing instruments, and precision appliances enduring high operational stress.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eStrategic Manufacturing Partner Qualifications\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eInternationally Certified Quality Systems:\u003c\/b\u003e We operate strictly under rigorous global quality management frameworks, proudly holding dual ISO9001 certifications and the stringent automotive industry standard IATF16949.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eRecognized Engineering Innovation:\u003c\/b\u003e Our continuous investment in engineering R\u0026amp;D is officially validated by our recognition as a High-Tech Enterprise and a Technology-Based SME in Zhejiang Province.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eGlobal Material Safety Compliance:\u003c\/b\u003e We exclusively utilize premium raw materials that meet strict international safety directives. Our products pass comprehensive third-party SGS laboratory testing for SVHC and RoHS compliance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eUncompromised Quality Control:\u003c\/b\u003e 100% precision-tested utilizing state-of-the-art roundness instruments and automatic noise testing equipment prior to global shipment.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eContact Us for Global Wholesale \u0026amp; Bulk Purchasing\u003c\/b\u003e Optimize your supply chain costs without compromising on extreme speed performance. Contact our international business development department today for B2B quotes, comprehensive technical datasheets, or to request free evaluation samples.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eGlobal Sales Representative:\u003c\/b\u003e Ryan Fan\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eDirect Email:\u003c\/b\u003e ryan.fan@ketprecisionbearings.com\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eWhatsApp:\u003c\/b\u003e +86-18067291918\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eOfficial Website:\u003c\/b\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003ca rel=\"noopener\" href=\"https:\/\/www.google.com\/search?q=https%3A%2F%2Fwww.ketprecisionbearings.com\u0026amp;authuser=1\" class=\"ng-star-inserted\" target=\"_blank\"\u003ewww.ketprecisionbearings.com\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp id=\"p-rc_3391ca0a880d198b-1348\"\u003e\u003cspan\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003csup class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"KET Precision Bearings","offers":[{"title":"7mm \/ 13mm \/ 2.5 mm (Open) \/ 3 mm (Shielded)","offer_id":49417691595008,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0829\/6890\/3936\/files\/Ultra-microprecisiondeepgrooveballbearing.webp?v=1787508371","url":"https:\/\/ketprecisionbearings.com\/ru\/products\/ket-mr137-mr137zz-metric-miniature-ball-bearing-7x13x4mm-high-speed-precision-micro-bearing","provider":"KET Precision Bearings","version":"1.0","type":"link"}