{"product_id":"house-brand-replacement-turntable-main-bearing-ball","title":"House Brand Replacement Turntable Main Bearing Ball","description":"\u003cp\u003eA replacement main bearing ball in multiple sizes and two grades: high-tolerance chrome or extremely-high-tolerance silicon nitride ceramic. These are The Listening Room's own aftermarket spare, not a factory fitted part for any particular turntable.\u003c\/p\u003e\n\u003ch5\u003e3\/16th of an Inch\u003c\/h5\u003e\n\u003cp\u003eCommon size for many US made tables and a common fitment for Rega and Pro-Ject turntables. 3\/16th inch balls are more widely available than 5mm balls and come in higher tolerance grades at a lower price.\u003c\/p\u003e\n\u003cp\u003eOur 3\/16th chrome balls have a sphericity of .000010 inch.\u003c\/p\u003e\n\u003cp\u003eOur 3\/16th ceramic balls have a sphericity of .000003 inch and are made of trisilicon tetranitride (silicon nitride) which resists chipping and cracking much better than cheaper ceramics.\u003c\/p\u003e\n\u003ch5\u003e7\/32nd of an Inch\u003c\/h5\u003e\n\u003cp\u003eCommon size for Michell Turntables built after 1985. Used for both the main bearing and suspension columns.\u003c\/p\u003e\n\u003cp\u003eOur 7\/32nd chrome balls have a sphericity of .000010 inch.\u003c\/p\u003e\n\u003cp\u003eOur 7\/32nd ceramic balls have a sphericity of .000003 inch and are made of trisilicon tetranitride (silicon nitride) which resists chipping and cracking much better than cheaper ceramics.\u003c\/p\u003e\n\u003ch5\u003e5mm\u003c\/h5\u003e\n\u003cp\u003eFactory size Gold Note turntables. Pricier than their non-metric siblings but the true proper fit.\u003c\/p\u003e\n\u003cp\u003eOur 5mm chrome balls have a sphericity of .000010 inch.\u003c\/p\u003e\n\u003cp\u003eOur 5mm ceramic balls have a sphericity of .000005 inch and are made of trisilicon tetranitride (silicon nitride) which resists chipping and cracking much better than cheaper ceramics.\u003c\/p\u003e\n\u003ch5\u003eHouse Brand Main Bearing Ball Specifications\u003c\/h5\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSizes\u003c\/td\u003e\n\u003ctd\u003e3\/16 inch (4.76mm), 7\/32 inch (5.56mm), 5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterials\u003c\/td\u003e\n\u003ctd\u003eChrome, or ceramic (silicon nitride, Si3N4)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChrome sphericity\u003c\/td\u003e\n\u003ctd\u003e.000010 inch (all sizes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCeramic sphericity\u003c\/td\u003e\n\u003ctd\u003e.000003 inch (3\/16 and 7\/32 inch), .000005 inch (5mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\/16 inch fitment\u003c\/td\u003e\n\u003ctd\u003eRega, Pro-Ject and many US made turntables\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e7\/32 inch fitment\u003c\/td\u003e\n\u003ctd\u003eMichell turntables built after 1985 (main bearing and suspension columns)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5mm fitment\u003c\/td\u003e\n\u003ctd\u003eGold Note turntables (factory size)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003eOne ball\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"The Listening Room","offers":[{"title":"3\/16th \/ Chrome","offer_id":67747725770848,"sku":"TLRBALL316CHR","price":0.95,"currency_code":"USD","in_stock":true},{"title":"3\/16th \/ Ceramic (Silicon Nitride)","offer_id":67747725803616,"sku":"TLRBALL316CER","price":14.95,"currency_code":"USD","in_stock":true},{"title":"7\/32nd \/ Chrome","offer_id":67755244322912,"sku":"TLRBALL732CHR","price":4.95,"currency_code":"USD","in_stock":true},{"title":"7\/32nd \/ Ceramic (Silicon Nitride)","offer_id":67755244355680,"sku":"TLRBALL732CER","price":19.95,"currency_code":"USD","in_stock":true},{"title":"5mm \/ Chrome","offer_id":67755244257376,"sku":"TLRBALL5MMCHR","price":9.95,"currency_code":"USD","in_stock":true},{"title":"5mm \/ Ceramic (Silicon Nitride)","offer_id":67755244290144,"sku":"TLRBALL5MMCER","price":24.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0555\/5073\/8528\/files\/house-brand-main-bearing-ball-ceramic-silicon-nitride.jpg?v=1794021544","url":"https:\/\/listenroom.com\/products\/house-brand-replacement-turntable-main-bearing-ball","provider":"The Listening Room","version":"1.0","type":"link"}