{"product_id":"needle-roller-bearing-na4900-na4919-inner-ring-drawn-cup-steel","title":"Bearing Needle Roller NA4900 - NA4919 with Inner Ring Drawn Cup Bearings Steel","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eNA4900–NA4919 Needle Roller Bearings with Inner Ring — Compact Radial Load Solution\u003c\/h2\u003e\n\u003cp\u003eWhen shaft space is tight but radial load demands are high, standard ball bearings fall short. Engineers, mechanics, and DIY builders working on gearboxes, automotive drivetrains, agricultural equipment, and industrial machinery need a bearing that delivers maximum load capacity in a minimal envelope. The NA4900–NA4919 series needle roller bearings with inner ring are engineered precisely for these demanding scenarios.\u003c\/p\u003e\n\u003cp\u003eEach bearing consists of a drawn cup outer ring, a full complement of hardened steel needle rollers, and a machined inner ring — all manufactured from bearing-grade steel. Available sizes span inner diameters from 10mm to 30mm (approximately 0.39\" to 1.18\"), outer diameters from 22mm to 47mm (approximately 0.87\" to 1.85\"), and heights of 13mm or 17mm (approximately 0.51\" to 0.67\"), covering the NA4900 through NA4919 designation range.\u003c\/p\u003e\n\u003cp\u003eTypical applications include compact gearbox shaft support, connecting rod small-end bearings in small engines, conveyor roller assemblies requiring high radial stiffness, and precision motion control systems where axial space is constrained. The included inner ring eliminates the need for a hardened shaft surface, making these bearings ideal for replacement and retrofit projects.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e🔧\u003c\/span\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Fits standard NA49xx series housing bores. Inner ring eliminates hardened shaft requirement — compatible with unhardened shafts. Verify ID × OD × Height dimensions against your application before ordering.\n\u003c\/div\u003e\n\n\u003ch2\u003e✅ Key Features of These Needle Roller Bearings with Inner Ring\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e⚙️\u003c\/div\u003e\n\u003cstrong\u003eFull Complement Needle Rollers\u003c\/strong\u003e\n\u003cp\u003eMaximizes the number of rolling elements for superior radial load capacity relative to bearing cross-section — ideal for space-constrained assemblies.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🔩\u003c\/div\u003e\n\u003cstrong\u003eIntegrated Machined Inner Ring\u003c\/strong\u003e\n\u003cp\u003eThe included inner ring distributes load evenly across the needle rollers and removes the need for a hardened shaft journal, simplifying installation in retrofit and repair applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🛡️\u003c\/div\u003e\n\u003cstrong\u003eBearing-Grade Steel Construction\u003c\/strong\u003e\n\u003cp\u003eDrawn cup outer ring and inner ring are manufactured from through-hardened bearing steel, providing resistance to deformation under sustained radial loads and cyclic stress.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e📐\u003c\/div\u003e\n\u003cstrong\u003eWide Size Range: NA4900–NA4919\u003c\/strong\u003e\n\u003cp\u003eSeven size options from 10×22×13mm to 30×47×17mm (ID×OD×H) cover a broad range of shaft diameters and housing bores within a single product family.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🔄\u003c\/div\u003e\n\u003cstrong\u003eLow Cross-Section Profile\u003c\/strong\u003e\n\u003cp\u003eThe drawn cup design keeps the radial wall thickness minimal, enabling use in assemblies where a standard deep-groove ball bearing would not physically fit.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e📦\u003c\/div\u003e\n\u003cstrong\u003eFlexible Quantity Options\u003c\/strong\u003e\n\u003cp\u003eAvailable in packs of 1, 2, 3, 5, or 10 pieces — order exactly what your project requires, from single-unit repairs to small production runs.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003ch2\u003e📐 Technical Specifications — Needle Roller Bearings\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBearing Series\u003c\/th\u003e\n\u003ctd\u003eNA4900 – NA4919\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eType\u003c\/th\u003e\n\u003ctd\u003eNeedle Roller Bearing with Inner Ring (Drawn Cup)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInner Diameter (ID)\u003c\/th\u003e\n\u003ctd\u003e10 – 30 mm (0.39\" – 1.18\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Diameter (OD)\u003c\/th\u003e\n\u003ctd\u003e22 – 47 mm (0.87\" – 1.85\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeight\u003c\/th\u003e\n\u003ctd\u003e13 – 17 mm (0.51\" – 0.67\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Size Options\u003c\/th\u003e\n\u003ctd\u003e10×22×13, 12×24×13, 15×28×13, 17×30×13, 20×37×17, 25×42×17, 30×47×17 (mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eBearing-grade hardened steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Ring Type\u003c\/th\u003e\n\u003ctd\u003eDrawn cup\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInner Ring\u003c\/th\u003e\n\u003ctd\u003eIncluded (machined)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRolling Element\u003c\/th\u003e\n\u003ctd\u003eFull complement needle rollers\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\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStatic Load Rating\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\u003ePack Quantity\u003c\/th\u003e\n\u003ctd\u003e1 \/ 2 \/ 3 \/ 5 \/ 10 Pcs (select above)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eHow do I select the correct size for my application?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMatch the bearing's Inner Diameter (ID) to your shaft diameter and the Outer Diameter (OD) to your housing bore. The Height dimension must fit within your available axial space. Cross-reference with the NA49xx designation chart: for example, NA4900 corresponds to 10×22×13mm. Always measure your existing bearing or shaft\/housing before ordering.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eDo I need a hardened shaft to use these bearings?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eNo. The integrated inner ring is the key advantage of the NA49xx series over caged needle roller assemblies without an inner ring. Because the needles run on the inner ring surface rather than directly on the shaft, the shaft does not need to be case-hardened or ground to bearing tolerances. This makes these bearings well-suited for replacement and retrofit applications.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhat radial load capacity can I expect?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe full complement needle roller design maximizes the number of rolling elements, giving these bearings a higher radial load capacity per unit cross-section than equivalent ball bearings. Specific dynamic (C) and static (C₀) load ratings vary by size — consult the NA49xx series datasheet for your specific designation. As a general guide, the 10mm ID variant handles lighter loads while the 30mm ID variant supports significantly higher radial forces.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eAre these bearings corrosion-resistant?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThese bearings are manufactured from standard bearing-grade carbon-chromium steel, which provides good wear resistance under normal operating conditions. They are not inherently stainless and will corrode if exposed to moisture or aggressive chemicals without adequate lubrication or protective coatings. For wet or corrosive environments, ensure proper sealing and re-lubrication intervals, or consider stainless steel variants for your application.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhat type of lubrication is recommended?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eGrease lubrication is suitable for most low-to-medium speed applications. For higher speeds or elevated temperatures, oil lubrication may be preferred. Apply lubricant before installation and establish a re-lubrication schedule based on operating speed, load, and environmental conditions. Avoid over-greasing, which can cause heat buildup in full complement designs.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eCan these replace OEM bearings in automotive or machinery applications?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes, provided the dimensional specifications (ID × OD × Height) match the OEM bearing exactly. The NA49xx designation is an internationally standardized series, so these bearings are dimensionally interchangeable with other manufacturers' NA4900–NA4919 bearings. Always verify the designation and dimensions against your service manual or the original bearing's markings before installation.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between ordering 1 Pcs vs. a multi-pack?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eEach pack contains the selected quantity of identical bearings in the same size. Multi-packs (2, 3, 5, or 10 Pcs) offer a lower per-unit cost and are practical for applications requiring multiple bearings — such as both ends of a shaft, multiple conveyor rollers, or keeping spares on hand for maintenance. Select the quantity that matches your project needs using the Amount option above.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-cta\"\u003e\n🛒 Select your ID × OD × Height size and quantity above, then add to cart.\n\u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I select the correct size for my application?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Match the bearing's Inner Diameter (ID) to your shaft diameter and the Outer Diameter (OD) to your housing bore. The Height dimension must fit within your available axial space. Cross-reference with the NA49xx designation chart: for example, NA4900 corresponds to 10x22x13mm. Always measure your existing bearing or shaft\/housing before ordering.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Do I need a hardened shaft to use these bearings?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"No. The integrated inner ring means the needles run on the inner ring surface rather than directly on the shaft, so the shaft does not need to be case-hardened or ground to bearing tolerances.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What radial load capacity can I expect?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The full complement needle roller design gives these bearings a higher radial load capacity per unit cross-section than equivalent ball bearings. Specific ratings vary by size — consult the NA49xx series datasheet for your designation.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these bearings corrosion-resistant?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"These bearings are made from standard bearing-grade carbon-chromium steel. They are not inherently stainless and require adequate lubrication or sealing in wet or corrosive environments.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What type of lubrication is recommended?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Grease lubrication suits most low-to-medium speed applications. For higher speeds or elevated temperatures, oil lubrication may be preferred. Establish a re-lubrication schedule based on operating conditions.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can these replace OEM bearings in automotive or machinery applications?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, provided the dimensional specifications (ID x OD x Height) match the OEM bearing exactly. The NA49xx designation is internationally standardized and dimensionally interchangeable with other manufacturers' NA4900-NA4919 bearings.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the difference between ordering 1 Pcs vs. a multi-pack?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Multi-packs (2, 3, 5, or 10 Pcs) offer a lower per-unit cost and are practical for applications requiring multiple bearings or keeping spares on hand. Select the quantity that matches your project needs.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"10 x 22 x 13mm \/ 1 Pcs","offer_id":52448922632466,"sku":"BGMSHXJZC0929x1","price":4.23,"currency_code":"USD","in_stock":true},{"title":"10 x 22 x 13mm \/ 2 Pcs","offer_id":52448922665234,"sku":"BGMSHXJZC0929x2","price":6.2,"currency_code":"USD","in_stock":true},{"title":"10 x 22 x 13mm \/ 3 Pcs","offer_id":52448922698002,"sku":"BGMSHXJZC0929x3","price":8.58,"currency_code":"USD","in_stock":true},{"title":"10 x 22 x 13mm \/ 5 Pcs","offer_id":52448922730770,"sku":"BGMSHXJZC0929x5","price":13.22,"currency_code":"USD","in_stock":true},{"title":"10 x 22 x 13mm \/ 10 Pcs","offer_id":52448922763538,"sku":"BGMSHXJZC0929x10","price":24.98,"currency_code":"USD","in_stock":true},{"title":"12 x 24 x 13mm \/ 1 Pcs","offer_id":52448922796306,"sku":"BGMSHXJZC0930x1","price":4.41,"currency_code":"USD","in_stock":true},{"title":"12 x 24 x 13mm \/ 2 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