{"product_id":"440-stainless-steel-thrust-ball-bearing-s511-s512-series","title":"440 Stainless Steel Thrust Ball Bearing Three Parts Bearings S511-S512 Series","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003e440 Stainless Steel Thrust Ball Bearings — Axial Load Capacity Across the Full S511 \u0026amp; S512 Range\u003c\/h2\u003e\n\u003cp\u003eWhen your rotating assembly demands reliable axial load handling in wet, corrosive, or high-cycle environments, standard carbon steel bearings fall short fast. Engineers, machinists, and serious DIYers working on pumps, marine hardware, rotary tables, and precision jigs need a thrust bearing that holds its geometry and resists surface degradation over time. These 440 stainless steel thrust ball bearings are built for exactly that application.\u003c\/p\u003e\n\u003cp\u003eEach bearing is a three-part assembly — shaft washer, housing washer, and ball-and-cage assembly — machined from 440-grade stainless steel. The S511 series covers inner diameters from 10 mm (0.39 in) to 130 mm (5.12 in) with outer diameters ranging from 24 mm (0.94 in) to 170 mm (6.69 in) and thickness from 9 mm (0.35 in) to 30 mm (1.18 in). The S512 series offers a heavier-duty profile with increased thickness for the same bore range, with thickness values from 11 mm (0.43 in) to 35 mm (1.38 in).\u003c\/p\u003e\n\u003cp\u003eTypical use cases include axial load management in vertical shaft pump assemblies, thrust positioning in CNC rotary axis builds, and corrosion-resistant bearing replacement in marine deck hardware and food-processing equipment where stainless is a specification requirement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e🔩\u003c\/span\u003e \u003cstrong\u003eCompatibility:\u003c\/strong\u003e Fits standard shaft and housing bores per ISO dimensions. S511 series matches light-duty axial applications; S512 series suits medium-duty axial loads with wider contact geometry. Verify ID, OD, and thickness against your housing drawing before ordering.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These 440 Stainless Steel Thrust Ball Bearings\u003c\/h2\u003e\n\u003cul class=\"hdiy-list\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🦾\u003c\/span\u003e\u003cstrong\u003e440 Stainless Steel Construction\u003c\/strong\u003e — Shaft washer, housing washer, and cage all in 440-grade stainless for consistent corrosion resistance across the full bearing assembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cstrong\u003eWide Size Range — S511 \u0026amp; S512 Series\u003c\/strong\u003e — 23 S511 variants (ID 10–130 mm) and 19 S512 variants (ID 10–90 mm) cover the most common bore sizes in a single listing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e\u003cstrong\u003eThree-Part Separable Design\u003c\/strong\u003e — Shaft washer, housing washer, and ball-and-cage unit are separable for easier installation, inspection, and replacement without disturbing adjacent components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e💧\u003c\/span\u003e\u003cstrong\u003eCorrosion-Resistant in Wet Environments\u003c\/strong\u003e — 440 stainless performs in water-exposed, humid, and mildly acidic environments where carbon steel bearings would corrode and seize.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e\u003cstrong\u003eAxial Load Optimized\u003c\/strong\u003e — Flat-race geometry is engineered for pure thrust (axial) loads; not intended for radial loading, keeping the contact stress where it belongs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\u003cstrong\u003eISO-Compatible Dimensions\u003c\/strong\u003e — Bore, OD, and thickness follow standard dimensional conventions, making these drop-in replacements for worn or corroded thrust bearings in existing assemblies.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — Thrust Ball Bearings\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSeries\u003c\/th\u003e\n\u003ctd\u003eS511 (light duty) \/ S512 (medium duty)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e440 Stainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBearing Type\u003c\/th\u003e\n\u003ctd\u003eThrust Ball Bearing, Three-Part\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInner Diameter (ID) Range\u003c\/th\u003e\n\u003ctd\u003e10 mm – 130 mm (0.39 in – 5.12 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Diameter (OD) Range\u003c\/th\u003e\n\u003ctd\u003e24 mm – 170 mm (0.94 in – 6.69 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThickness Range\u003c\/th\u003e\n\u003ctd\u003e9 mm – 35 mm (0.35 in – 1.38 in) — varies by variant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLoad Direction\u003c\/th\u003e\n\u003ctd\u003eAxial (Thrust) Only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCage Material\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLubrication\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDynamic Load Rating (C)\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStatic Load Rating (C0)\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMax Operating Speed\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\u003eContact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I choose between the S511 and S512 series?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe S511 series has a thinner profile and is suited for light axial loads where space is limited. The S512 series uses a thicker cross-section for the same bore diameter, providing a larger ball complement and higher load capacity. If your application involves significant thrust forces or shock loading, the S512 is the better choice. Check the variant name — S511xx vs S512xx — and match the thickness to your housing depth.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these bearings strong enough for industrial pump applications?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese bearings are designed for axial (thrust) load applications including vertical shaft pumps, rotary tables, and similar equipment. The 440 stainless construction provides adequate strength for moderate-duty industrial use. For heavy-duty or high-speed pump applications, verify the dynamic load rating (C) against your calculated bearing load before selecting a size.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill 440 stainless steel resist corrosion in saltwater or marine environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003e440 stainless steel offers good corrosion resistance in freshwater and mildly corrosive environments. In continuous saltwater immersion or highly chlorinated environments, 316 stainless would be more appropriate. For intermittent marine exposure — such as deck hardware or bilge pump shafts — 440 stainless performs well when kept clean and lightly lubricated.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these bearings for radial (side) loads?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eNo. Thrust ball bearings are designed exclusively for axial (thrust) loads applied parallel to the shaft axis. Applying radial loads to a thrust bearing will cause rapid wear, ball skidding, and premature failure. If your application involves combined radial and axial loads, use an angular contact or deep groove ball bearing instead.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I measure my existing bearing to find the right replacement size?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMeasure three dimensions with calipers: (1) Inner Diameter (ID) — the bore that fits over the shaft; (2) Outer Diameter (OD) — the overall outside diameter; (3) Thickness (T) — the total height of the assembled bearing. Match these three values to the variant name format shown in the listing: ID × OD × Thickness in millimeters. For example, S51104 (20×35×10) means ID=20mm, OD=35mm, Thickness=10mm.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo these bearings come pre-lubricated?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eLubrication state varies by variant — please contact us to confirm for your specific size. As a general practice for thrust ball bearings, applying a light coat of grease (NLGI #2) or oil to the raceways before installation is recommended, particularly in applications with moderate speeds or where re-lubrication access is limited.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the correct installation orientation for a thrust ball bearing?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe shaft washer (the washer with the smaller bore) seats against the rotating shaft shoulder. The housing washer (larger bore) seats against the stationary housing. Installing them reversed will cause the bearing to run incorrectly and wear prematurely. The ball-and-cage assembly sits between the two washers. Ensure both mating surfaces are flat, clean, and free of burrs before assembly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your Size (ID x OD x Thickness) above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"S51100 (10*24*9)","offer_id":52410796146962,"sku":"GLFBNHHSKDLJX1002x1","price":2.98,"currency_code":"USD","in_stock":true},{"title":"S51101 (12*26*9)","offer_id":52410796179730,"sku":"GLFBNHHSKDLJX1003x1","price":3.11,"currency_code":"USD","in_stock":true},{"title":"S51102 (15*28*9)","offer_id":52410796212498,"sku":"GLFBNHHSKDLJX1004x1","price":3.39,"currency_code":"USD","in_stock":true},{"title":"S51103 (17*30*9)","offer_id":52410796245266,"sku":"GLFBNHHSKDLJX1005x1","price":4.34,"currency_code":"USD","in_stock":true},{"title":"S51104 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