{"product_id":"pump-motor-bearing-6304-2rs","title":"6304 Pool \u0026 Spa Pump Motor Bearing 2RS Sealed - ID 20mm, OD 52mm, W 15mm","description":"\u003ch3\u003ePool \u0026amp; Spa Pump Motor Bearing 6304 2RS Sealed - ID 20mm, OD 52mm, W 15mm\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003cstrong\u003ePhysically Stocked, unlike most \"drop-shipping\" websites.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003cstrong\u003eShipped from VIC, NSW, WA, QLD\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSealed 6304 deep groove ball bearing for pool and spa pump electric motors. A heavy-duty 6300-series bearing with a 20mm shaft bore, a 52mm outside diameter and a 15mm width.\u003c\/p\u003e\n\u003cp\u003eSupplied from premium manufacturers including NTN, FAG, SKF, Nachi, NSK, Koyo\/JTEKT and Timken, depending on availability. All are sealed motor bearings suitable for the application.\u003c\/p\u003e\n\u003ch3\u003eCheck Your Existing Bearing Before Ordering\u003c\/h3\u003e\n\u003cp\u003eWhile these bearings are the sizes commonly used in the pumps listed below, we recommend double checking your current bearings before ordering. Brands use several variants of motor across a model's production life, so the pump model on the nameplate does not always identify the bearing fitted inside the motor.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBearing designation: 6304\u003c\/li\u003e\n\u003cli\u003eInside diameter (bore): 20mm\u003c\/li\u003e\n\u003cli\u003eOutside diameter: 52mm\u003c\/li\u003e\n\u003cli\u003eWidth: 15mm\u003c\/li\u003e\n\u003cli\u003eType: single row deep groove ball bearing, 6300 heavy series\u003c\/li\u003e\n\u003cli\u003eSealing: 2RS, rubber sealed both sides\u003c\/li\u003e\n\u003cli\u003eSold as: single bearing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhere This Size Is Used\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCommonly encountered in larger pool pump electric motors where a heavy duty bearing is required on a 20mm shaft.\u003c\/li\u003e\n\u003cli\u003eAustralian pump manufacturers have used different motor assemblies across apparently similar pump ranges, so model-only compatibility should not be assumed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eNot To Be Confused With The 6204 Or The 6205\u003c\/h3\u003e\n\u003cp\u003eThe \u003ca href=\"\/products\/pump-motor-bearing-6204-2rs\"\u003e6204\u003c\/a\u003e shares the 20mm bore but is 47mm across and 14mm wide. The \u003ca href=\"\/products\/pump-motor-bearing-6205-2rs\"\u003e6205\u003c\/a\u003e shares the 52mm outside diameter and 15mm width but has a larger 25mm bore. Check all three dimensions, because each of these neighbours matches the 6304 on two of them.\u003c\/p\u003e\n\u003ch3\u003eHow To Identify The Bearing You Need\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe most reliable method is to read the number stamped on the face of the old bearing. A 6304 will be marked 6304, usually followed by a suffix such as 2RS, 2RS1, 2RSH, DDU or C3.\u003c\/li\u003e\n\u003cli\u003eIf the marking is unreadable, measure the bore, the outside diameter and the width with vernier calipers and match them to the figures above.\u003c\/li\u003e\n\u003cli\u003eThe four-digit number sets the dimensions. Suffixes describe sealing type and internal clearance. Where the motor specifies a particular suffix or a special bearing arrangement, match that specification as well.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSymptoms Of A Failed Pump Motor Bearing\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eA rumble, growl or grinding that rises and falls with motor speed\u003c\/li\u003e\n\u003cli\u003eA high-pitched squeal on start-up that settles once warm\u003c\/li\u003e\n\u003cli\u003eNoise that gets steadily worse over weeks rather than appearing overnight\u003c\/li\u003e\n\u003cli\u003eA shaft that feels notchy or rough when turned by hand with the power isolated\u003c\/li\u003e\n\u003cli\u003eMotor running noticeably hotter than usual\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFind Out Why It Failed\u003c\/h3\u003e\n\u003cp\u003ePump motor bearings rarely fail from age alone. The most common cause is a weeping mechanical seal letting water track back along the shaft into the front bearing. Fitting new bearings without replacing the mechanical seal usually means doing the job again. Check that the shaft slinger is present and intact while the motor is apart.\u003c\/p\u003e\n\u003ch3\u003eFitting Notes\u003c\/h3\u003e\n\u003cp\u003eBearing replacement needs a puller and a press or a correctly sized drift. Never drive a bearing on by hitting the outer race, which brinells the tracks and guarantees early failure. Always replace both bearings, never one. This is workshop work for someone equipped to do it, and electrical reconnection must be carried out by a licensed electrician.\u003c\/p\u003e\n\u003ch3\u003eOther Pump Motor Bearing Sizes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/pump-motor-bearing-6201-2rs\"\u003e6201 - ID 12mm, OD 32mm, W 10mm\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/pump-motor-bearing-6202-2rs\"\u003e6202 - ID 15mm, OD 35mm, W 11mm\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/pump-motor-bearing-6203-2rs\"\u003e6203 - ID 17mm, OD 40mm, W 12mm\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/pump-motor-bearing-6204-2rs\"\u003e6204 - ID 20mm, OD 47mm, W 14mm\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/pump-motor-bearing-6205-2rs\"\u003e6205 - ID 25mm, OD 52mm, W 15mm\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/pump-motor-bearing-6302-2rs\"\u003e6302 - ID 15mm, OD 42mm, W 13mm\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/pump-motor-bearing-6303-2rs\"\u003e6303 - ID 17mm, OD 47mm, W 14mm\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat size is a 6304 bearing?\u003c\/strong\u003e\u003cbr\u003e20mm inside diameter, 52mm outside diameter and 15mm wide.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between a 6204 and a 6304?\u003c\/strong\u003e\u003cbr\u003eBoth have a 20mm bore. The 6304 is from the heavier 6300 series, at 52mm outside diameter and 15mm wide against the 6204 at 47mm and 14mm. They are not interchangeable.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMy bearing measures 52mm across. Is it a 6304 or a 6205?\u003c\/strong\u003e\u003cbr\u003eCheck the bore. A 6304 has a 20mm bore and a 6205 has a 25mm bore. Both are 52mm outside diameter and 15mm wide, so the shaft size is what separates them.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need one bearing or two?\u003c\/strong\u003e\u003cbr\u003eMost pump motors use two bearings, and they are not always the same size. Check both ends of the motor, and always replace them as a pair.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"text-decoration: underline;\"\u003eImportant Before Ordering:\u003c\/span\u003e\u003c\/strong\u003e Please ensure you order correctly. Confirm this product is suitable before ordering. Seek professional assistance, or \u003ca href=\"mailto:shop@hasp.com.au\"\u003econtact us\u003c\/a\u003e with photos of your existing part, model details, serial numbers, and any labels.\u003c\/p\u003e\n\u003cp\u003eAs with all products, these must be diagnosed and fitted by a qualified and experienced person.\u003c\/p\u003e\n\u003chr\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    { \"@type\": \"Question\", \"name\": \"What size is a 6304 bearing?\", \"acceptedAnswer\": { \"@type\": \"Answer\", \"text\": \"20mm inside diameter, 52mm outside diameter and 15mm wide.\" } },\n    { \"@type\": \"Question\", \"name\": \"What is the difference between a 6204 and a 6304 bearing?\", \"acceptedAnswer\": { \"@type\": \"Answer\", \"text\": \"Both have a 20mm bore. The 6304 is from the heavier 6300 series, at 52mm outside diameter and 15mm wide against the 6204 at 47mm and 14mm. They are not interchangeable.\" } },\n    { \"@type\": \"Question\", \"name\": \"My bearing measures 52mm across. Is it a 6304 or a 6205?\", \"acceptedAnswer\": { \"@type\": \"Answer\", \"text\": \"Check the bore. A 6304 has a 20mm bore and a 6205 has a 25mm bore. Both are 52mm outside diameter and 15mm wide, so the shaft size is what separates them.\" } },\n    { \"@type\": \"Question\", \"name\": \"Do I need one pump motor bearing or two?\", \"acceptedAnswer\": { \"@type\": \"Answer\", \"text\": \"Most pump motors use two bearings, and they are not always the same size. Check both ends of the motor, and always replace them as a pair.\" } }\n  ]\n}\n\u003c\/script\u003e","brand":"Heater and Spa Parts","offers":[{"title":"Default Title","offer_id":68069114380477,"sku":"6304-2rs","price":21.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0372\/5253\/files\/6304-pool-spa-pump-motor-bearing-2rs-sealed-id-20mm-od-52mm-w-15mm-parts-749.webp?v=1793311749","url":"https:\/\/hasp.com.au\/products\/pump-motor-bearing-6304-2rs","provider":"Heater and Spa Parts","version":"1.0","type":"link"}