{"product_id":"grade-5-silicon-nitride-ball-bearings-si3n4-ceramic-balls-diameter-10mm-38-1mm","title":"Grade 5 Silicon Nitride Ball Bearings Si3N4 Ceramic Balls Diameter 10mm-38.1mm","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003ch2\u003eGrade 5 Si3N4 Silicon Nitride Ceramic Balls — Precision Rolling Elements for Demanding Applications\u003c\/h2\u003e\n\u003cp\u003eWhen standard steel balls fail under corrosive fluids, extreme temperatures, or high-speed rotation, engineers and maintenance professionals turn to silicon nitride ceramic balls. Grade 5 Si3N4 ceramic balls deliver the dimensional accuracy and surface finish required for precision bearing assemblies, pumps, and instrumentation where contamination or magnetic interference cannot be tolerated.\u003c\/p\u003e\n\u003cp\u003eThese Grade 5 silicon nitride (Si3N4) ceramic balls are manufactured to ABEC\/ISO Grade 5 tolerances, covering diameters from 10 mm (0.394 in) to 38.1 mm (1.500 in) — including both metric and inch-series sizes such as 10.318 mm (13\/32\"), 12.7 mm (1\/2\"), 15.875 mm (5\/8\"), 19.05 mm (3\/4\"), 22.225 mm (7\/8\"), 25.4 mm (1\"), 28.575 mm (1-1\/8\"), 31.75 mm (1-1\/4\"), and 38.1 mm (1-1\/2\"). Available in quantities of 1, 2, 3, 5, 8, or 10 pieces per order to suit both prototype and production needs.\u003c\/p\u003e\n\u003cp\u003eGrade 5 Si3N4 ceramic balls are widely used as hybrid bearing rolling elements in CNC spindles and machine tool bearings where reduced centrifugal force extends spindle life, in chemical pump assemblies handling acids and alkalis where steel balls would corrode, and in MRI-adjacent or electromagnetic-sensitive equipment where non-magnetic rolling elements are required. The low density (approximately 3.2 g\/cm³ vs. 7.8 g\/cm³ for steel) also makes these balls a preferred choice for high-speed angular contact bearings targeting reduced heat generation.\u003c\/p\u003e\n\u003ch2\u003e✅ Key Features of These Si3N4 Silicon Nitride Ceramic Balls\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGrade 5 dimensional tolerance — tight sphericity and surface roughness for precision bearing applications\u003c\/li\u003e\n\u003cli\u003eSilicon nitride (Si3N4) material — hardness exceeding 1,500 HV, far above bearing steel\u003c\/li\u003e\n\u003cli\u003eCorrosion-resistant — withstands acids, alkalis, and saltwater environments where steel fails\u003c\/li\u003e\n\u003cli\u003eNon-magnetic and electrically insulating — suitable for electromagnetic-sensitive assemblies\u003c\/li\u003e\n\u003cli\u003eLow density (~3.2 g\/cm³) — reduces centrifugal load at high RPM, lowering heat and wear\u003c\/li\u003e\n\u003cli\u003eWide diameter range — 10 mm to 38.1 mm covering metric and inch-series bearing standards\u003c\/li\u003e\n\u003cli\u003eFlexible quantity options — 1, 2, 3, 5, 8, or 10 PCS to match replacement or production volume\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e📐 Technical Specifications — Silicon Nitride Ceramic Balls\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eSilicon Nitride (Si3N4)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGrade\u003c\/th\u003e\n\u003ctd\u003eGrade 5 (ISO 3290 \/ ABEC Grade 5)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDiameter Range\u003c\/th\u003e\n\u003ctd\u003e10 mm – 38.1 mm (metric \u0026amp; inch series)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHardness\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDensity\u003c\/th\u003e\n\u003ctd\u003e~3.2 g\/cm³\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSurface Finish (Ra)\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOperating Temperature\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMagnetic Properties\u003c\/th\u003e\n\u003ctd\u003eNon-magnetic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eElectrical Properties\u003c\/th\u003e\n\u003ctd\u003eElectrically insulating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity Options\u003c\/th\u003e\n\u003ctd\u003e1 \/ 2 \/ 3 \/ 5 \/ 8 \/ 10 PCS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat does Grade 5 mean for ceramic balls?\u003c\/summary\u003e\u003cp\u003eGrade 5 refers to the dimensional tolerance class per ISO 3290 \/ AFBMA standards. It specifies maximum allowable deviation in diameter, sphericity, and surface roughness. Grade 5 balls are suitable for precision bearing assemblies including angular contact, deep groove, and thrust bearings in demanding applications.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eAre Si3N4 ceramic balls compatible with standard steel bearing rings?\u003c\/summary\u003e\u003cp\u003eYes. Silicon nitride ceramic balls are commonly used as drop-in replacements for steel balls in hybrid bearings, paired with standard steel or stainless steel inner and outer rings. This hybrid configuration reduces weight, heat, and wear compared to all-steel designs.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhich diameter should I select for my bearing?\u003c\/summary\u003e\u003cp\u003eMatch the ball diameter to your bearing's specified rolling element diameter. Both metric sizes (e.g., 10 mm, 12 mm, 15 mm, 16 mm, 20 mm, 25 mm, 30 mm) and inch-series sizes (e.g., 10.318 mm = 13\/32\", 12.7 mm = 1\/2\", 15.875 mm = 5\/8\", 19.05 mm = 3\/4\", 25.4 mm = 1\") are available. Refer to your bearing manufacturer's datasheet for the correct ball diameter.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan these balls be used in corrosive or wet environments?\u003c\/summary\u003e\u003cp\u003eYes. Si3N4 silicon nitride is chemically inert to most acids, alkalis, and saltwater solutions, making these balls suitable for pump impellers, chemical processing equipment, and marine applications where steel balls would corrode or contaminate the fluid.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eHow many pieces do I need to order?\u003c\/summary\u003e\u003cp\u003eSelect the quantity that matches your bearing's ball complement or your replacement requirement. Options of 1, 2, 3, 5, 8, and 10 PCS are available. For full bearing rebuilds, consult your bearing's specification sheet for the number of rolling elements per row.\u003c\/p\u003e\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cp\u003e🛒 Select your Diameter(mm) and Quantity(PCS) above, then add to cart.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What does Grade 5 mean for ceramic balls?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Grade 5 refers to the dimensional tolerance class per ISO 3290 \/ AFBMA standards. It specifies maximum allowable deviation in diameter, sphericity, and surface roughness. Grade 5 balls are suitable for precision bearing assemblies including angular contact, deep groove, and thrust bearings in demanding applications.\"}},{\"@type\":\"Question\",\"name\":\"Are Si3N4 ceramic balls compatible with standard steel bearing rings?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. Silicon nitride ceramic balls are commonly used as drop-in replacements for steel balls in hybrid bearings, paired with standard steel or stainless steel inner and outer rings. This hybrid configuration reduces weight, heat, and wear compared to all-steel designs.\"}},{\"@type\":\"Question\",\"name\":\"Which diameter should I select for my bearing?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Match the ball diameter to your bearing's specified rolling element diameter. Both metric sizes (e.g., 10 mm, 12 mm, 15 mm, 16 mm, 20 mm, 25 mm, 30 mm) and inch-series sizes (e.g., 10.318 mm = 13\/32\\\", 12.7 mm = 1\/2\\\", 15.875 mm = 5\/8\\\", 19.05 mm = 3\/4\\\", 25.4 mm = 1\\\") are available. Refer to your bearing manufacturer's datasheet for the correct ball diameter.\"}},{\"@type\":\"Question\",\"name\":\"Can these balls be used in corrosive or wet environments?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. Si3N4 silicon nitride is chemically inert to most acids, alkalis, and saltwater solutions, making these balls suitable for pump impellers, chemical processing equipment, and marine applications where steel balls would corrode or contaminate the fluid.\"}},{\"@type\":\"Question\",\"name\":\"How many pieces do I need to order?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Select the quantity that matches your bearing's ball complement or your replacement requirement. Options of 1, 2, 3, 5, 8, and 10 PCS are available. For full bearing rebuilds, consult your bearing's specification sheet for the number of rolling elements per row.\"}}]}\u003c\/script\u003e\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"10mm \/ 1PCS","offer_id":52410035437842,"sku":"GLFBTXJ2024GANGZHU1494x1","price":15.08,"currency_code":"USD","in_stock":true},{"title":"10mm \/ 2PCS","offer_id":52410035470610,"sku":"GLFBTXJ2024GANGZHU1494x2","price":24.37,"currency_code":"USD","in_stock":true},{"title":"10mm \/ 3PCS","offer_id":52410035503378,"sku":"GLFBTXJ2024GANGZHU1494x3","price":33.66,"currency_code":"USD","in_stock":true},{"title":"10mm \/ 5PCS","offer_id":52410035536146,"sku":"GLFBTXJ2024GANGZHU1494x5","price":52.22,"currency_code":"USD","in_stock":true},{"title":"10mm \/ 8PCS","offer_id":52410035568914,"sku":"GLFBTXJ2024GANGZHU1494x8","price":80.09,"currency_code":"USD","in_stock":true},{"title":"10mm \/ 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