{"product_id":"single-direction-axial-thrust-ball-bearings-51100-51107","title":"Single Direction 51100 51101 - 51107 Axial Thrust Ball Bearings Plane Bearing","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eSingle-Direction Axial Thrust Ball Bearings 51100–51107 — Reliable Axial Load Control for Precision Applications\u003c\/h2\u003e\n\u003cp\u003eWhen a rotating shaft needs to handle axial (thrust) loads without radial interference, standard radial bearings fall short. Engineers, machinists, and serious DIYers working on lathes, rotary tables, screw jacks, and vertical shaft assemblies need a dedicated axial thrust ball bearing that seats cleanly, runs true, and holds up under sustained one-directional load. These single-direction axial thrust ball bearings cover the 51100–51107 series, giving you a matched solution across a wide range of shaft sizes.\u003c\/p\u003e\n\u003cp\u003eEach bearing in this series consists of two hardened steel washers (shaft washer and housing washer) with a ball-and-cage assembly between them. Inner diameters span 10 mm (0.39 in) to 35 mm (1.38 in), outer diameters from 24 mm (0.94 in) to 52 mm (2.05 in), and thickness from 9 mm (0.35 in) to 12 mm (0.47 in). All dimensions follow the ISO 51100-series standard, ensuring drop-in compatibility with existing housings designed for this series.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include axial thrust ball bearings for lathe tailstock spindles, rotary table thrust faces, screw jack thrust seats, and vertical pump shaft assemblies — anywhere a clean, low-friction axial load path is required without radial guidance.\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 Designed for single-direction axial loads only. Not suitable for combined radial + axial loading. Confirm shaft diameter and housing bore against the model dimensions before ordering.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These Axial 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\u003e8 Models, One Series:\u003c\/strong\u003e Covers 51100 through 51107 — ID 10 mm to 35 mm — so you can source the exact size for your shaft without adapters or shimming.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cstrong\u003eHardened Steel Washers:\u003c\/strong\u003e Both shaft and housing washers are through-hardened for consistent load distribution and resistance to brinelling under sustained axial force.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e\u003cstrong\u003eISO 51100-Series Dimensions:\u003c\/strong\u003e Conforms to standard dimensional tolerances, making these bearings interchangeable with OEM and aftermarket housings designed for the 51100 series.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\u003cstrong\u003eSingle-Direction Thrust Design:\u003c\/strong\u003e The flat washer-and-cage geometry transmits axial load in one direction with minimal friction, keeping rotating assemblies smooth at low-to-moderate speeds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\u003cstrong\u003eFlexible Pack Quantities:\u003c\/strong\u003e Available in 1, 5, 20, or 50-piece packs — order a single bearing for a repair or a bulk pack for production runs and maintenance stock.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\u003cstrong\u003eGrease-Lubricated Ready:\u003c\/strong\u003e The open design accepts standard bearing grease applied at installation, allowing you to match the lubricant to your operating temperature and load conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — Axial Thrust Ball Bearings\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBearing Type\u003c\/th\u003e\n\u003ctd\u003eSingle-Direction Axial Thrust Ball Bearing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSeries\u003c\/th\u003e\n\u003ctd\u003e51100 \/ 51101 \/ 51102 \/ 51103 \/ 51104 \/ 51105 \/ 51106 \/ 51107\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInner Diameter (ID)\u003c\/th\u003e\n\u003ctd\u003e10 mm – 35 mm (0.39 in – 1.38 in) — See variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Diameter (OD)\u003c\/th\u003e\n\u003ctd\u003e24 mm – 52 mm (0.94 in – 2.05 in) — See variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThickness\u003c\/th\u003e\n\u003ctd\u003e9 mm – 12 mm (0.35 in – 0.47 in) — See variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eHardened carbon steel (washers and balls)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCage Material\u003c\/th\u003e\n\u003ctd\u003eSteel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLubrication\u003c\/th\u003e\n\u003ctd\u003eOpen design — grease lubrication at installation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLoad Direction\u003c\/th\u003e\n\u003ctd\u003eAxial (single direction) only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensional Standard\u003c\/th\u003e\n\u003ctd\u003eISO 51100 series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantity\u003c\/th\u003e\n\u003ctd\u003e1 \/ 5 \/ 20 \/ 50 pcs — See variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight (per piece)\u003c\/th\u003e\n\u003ctd\u003eSee variant options\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 the right model number for my shaft?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMatch the bearing's inner diameter (ID) to your shaft diameter. For example, if your shaft is 15 mm, select model 51102 (15×28×9 mm). The outer diameter and thickness are fixed per model, so also confirm that your housing bore and axial clearance accommodate the OD and thickness listed in the variant name.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan these bearings handle radial loads as well as axial loads?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eNo. Single-direction axial thrust ball bearings are designed exclusively for axial (thrust) loads acting in one direction along the shaft axis. They provide no radial guidance. If your application involves combined radial and axial loading, you will need a separate radial bearing or a combined angular-contact bearing alongside this thrust bearing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the maximum speed these bearings are suitable for?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eAxial thrust ball bearings in the 51100 series are best suited for low-to-moderate rotational speeds. Exact speed limits depend on bearing size, lubrication, and load — consult the bearing's dynamic load rating and your application's RPM requirements. For high-speed applications, consider angular-contact or tapered roller bearings instead.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat lubricant should I use, and how often should I re-grease?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eApply a thin, even coat of general-purpose bearing grease (NLGI Grade 2 is a common choice) to both washer faces and the ball-cage assembly at installation. Re-greasing interval depends on operating speed, load, and environment — in typical workshop or light industrial use, inspect and re-grease every 500–1,000 operating hours or whenever the bearing runs noticeably warmer than ambient.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these bearings corrosion-resistant for outdoor or wet environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe standard 51100-series bearings are made from hardened carbon steel, which offers moderate corrosion resistance when properly greased but is not rated for continuous wet or corrosive exposure. For outdoor, marine, or washdown environments, apply a corrosion-inhibiting grease and consider adding a protective seal or shield around the bearing housing. If long-term corrosion resistance is critical, contact us to confirm availability of stainless-steel variants.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I install a single-direction thrust ball bearing correctly?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eSeat the shaft washer (the washer with the smaller bore) against the rotating shaft shoulder, and the housing washer (larger bore) against the stationary housing face. Apply grease before assembly. Ensure the shaft and housing faces are flat, clean, and perpendicular to the shaft axis — any angular misalignment will cause uneven load distribution and premature wear. Do not press-fit by striking the bearing directly; use a bearing press or a flat drift against the washer face.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I order a mixed pack of different model sizes?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eEach variant is sold as a single model size in the quantity you select (1, 5, 20, or 50 pcs). To order multiple sizes, simply add each model variant to your cart separately. If you need a custom assortment kit for a maintenance program, contact us to discuss bulk or mixed-model options.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your Model (IDxODxThickn) and Units (pcs) above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"51100 (10x24x9mm) \/ 1","offer_id":52409638519058,"sku":"LXDSHXJZC1518x1","price":4.01,"currency_code":"USD","in_stock":true},{"title":"51101 (12x26x9mm) \/ 1","offer_id":52409638551826,"sku":"LXDSHXJZC1519x1","price":4.15,"currency_code":"USD","in_stock":true},{"title":"51102 (15x28x9mm) \/ 1","offer_id":52409638584594,"sku":"LXDSHXJZC1520x1","price":4.34,"currency_code":"USD","in_stock":true},{"title":"51103 (17x30x9mm) \/ 1","offer_id":52409638617362,"sku":"LXDSHXJZC1521x1","price":4.47,"currency_code":"USD","in_stock":true},{"title":"51104 (20x35x10mm) \/ 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50","offer_id":52409639534866,"sku":"LXDSHXJZC1525x50","price":375.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/68d381ab-831c-48f3-b79f-4b896259faf8_60183282-05ce-43fb-a0c9-ebeee8a84db3.jpg?v=1782138913","url":"https:\/\/homediyer.com\/products\/single-direction-axial-thrust-ball-bearings-51100-51107","provider":"HomeDIYer","version":"1.0","type":"link"}