{"product_id":"pom-plastic-bearing-rs-deep-groove-ball-bearings-8mm-12mm","title":"Pom Plastic Bearing-RS Deep Groove Ball Bearings Roller Bearings I.D:8mm-12mm","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003ePOM Plastic Deep Groove Ball Bearings RS — Corrosion-Resistant Rolling Elements for 8–12mm Bore Applications\u003c\/h2\u003e\n\u003cp\u003eWhen a standard steel bearing corrodes, seizes, or adds unwanted weight to a lightweight mechanism, engineers and DIY builders working in food-contact, medical, marine, or chemical-adjacent environments need a non-metallic alternative that still delivers reliable radial load capacity. These POM plastic deep groove ball bearings with RS (rubber-sealed) shields fill that gap — available in bore sizes from 8 mm to 12 mm (~0.315 in to ~0.472 in) with quantity options from single-piece to 30-piece packs.\u003c\/p\u003e\n\u003cp\u003eEach bearing features a POM (polyoxymethylene \/ acetal) outer ring, inner ring, and cage, with steel or stainless rolling elements and a rubber contact seal (RS) on one or both sides to retain lubrication and exclude contaminants. Bore sizes span 8 mm to 12 mm, with outer diameter and width varying by bore size in line with standard deep-groove bearing dimensional series. The POM construction reduces bearing mass by approximately 50–60% compared to an equivalent all-steel unit and eliminates galvanic corrosion in mixed-material assemblies.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include conveyor rollers and guide wheels in food-processing lines where metal contamination must be avoided, lightweight pivot bearings in medical device housings and laboratory instruments, corrosion-resistant support bearings in marine deck hardware and wet-area fixtures, and low-noise rolling elements in 3D-printer carriage assemblies and hobbyist robotics where reduced rotational inertia is beneficial.\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 Note:\u003c\/strong\u003e POM bearings are rated for moderate radial loads and low-to-medium speeds. They are not suitable for high-temperature environments (sustained above ~80°C \/ 176°F) or heavy shock loads. Verify bore size, outer diameter, and width against your housing drawing before ordering. Contact us to confirm suitability for your specific application.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These POM Plastic Deep Groove Ball Bearings\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-list\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e \u003cstrong\u003eRS Rubber Contact Seal\u003c\/strong\u003e\n\u003cp\u003eSingle rubber contact seal (RS) retains factory-applied grease and excludes dust and light moisture, extending service intervals in moderately contaminated environments without requiring frequent relubrication.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🧪\u003c\/span\u003e \u003cstrong\u003ePOM Acetal Ring \u0026amp; Cage Construction\u003c\/strong\u003e\n\u003cp\u003ePolyoxymethylene rings and cage deliver inherent corrosion resistance, low moisture absorption, and a self-lubricating surface that reduces friction in slow-to-medium speed applications without additional grease in many cases.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚖️\u003c\/span\u003e \u003cstrong\u003eApproximately 50–60% Lighter Than Steel Equivalents\u003c\/strong\u003e\n\u003cp\u003eReduced bearing mass lowers rotational inertia in high-cycle mechanisms and reduces total assembly weight in portable or weight-sensitive equipment without sacrificing dimensional interchangeability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e \u003cstrong\u003eBore Range: 8 mm – 12 mm (0.315 in – 0.472 in)\u003c\/strong\u003e\n\u003cp\u003eFour bore sizes in a single listing cover the most common small-to-mid bore requirements in food, medical, and light industrial applications, with quantity options from 1 to 30 pieces per order.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔇\u003c\/span\u003e \u003cstrong\u003eLow Noise \u0026amp; Vibration in Operation\u003c\/strong\u003e\n\u003cp\u003ePOM material dampens vibration and reduces operational noise compared to all-steel bearings, making these units well-suited for laboratory instruments, medical devices, and consumer electronics where acoustic performance matters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🤝\u003c\/span\u003e \u003cstrong\u003eNon-Magnetic \u0026amp; Electrically Non-Conductive\u003c\/strong\u003e\n\u003cp\u003ePOM construction makes these bearings suitable for MRI-adjacent equipment, electromagnetic-sensitive assemblies, and applications where electrical isolation between shaft and housing is required.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — POM Plastic Deep Groove Ball Bearings\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eRing \u0026amp; Cage Material\u003c\/th\u003e\n\u003ctd\u003ePOM (polyoxymethylene \/ acetal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRolling Element Material\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSeal Type\u003c\/th\u003e\n\u003ctd\u003eRS (rubber contact seal, one side)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore (I.D.) Range\u003c\/th\u003e\n\u003ctd\u003e8 mm – 12 mm (0.315 in – 0.472 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Diameter\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWidth\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBearing Type\u003c\/th\u003e\n\u003ctd\u003eDeep groove ball bearing (single row)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMax Operating Temperature\u003c\/th\u003e\n\u003ctd\u003eApproximately −40°C to +80°C (−40°F to +176°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLoad Direction\u003c\/th\u003e\n\u003ctd\u003eRadial (primary); light axial\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLubrication\u003c\/th\u003e\n\u003ctd\u003eFactory-greased (retained by RS seal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantity Options\u003c\/th\u003e\n\u003ctd\u003e1, 5, 10, 15, 20, or 30 pieces\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 select the correct bore size for my shaft?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMeasure your shaft diameter with a micrometer or digital caliper. The bearing bore (I.D.) must match the shaft diameter within the standard interference or clearance fit tolerance for your application. For a light press fit on a rotating shaft, the bore should be 0–0.01 mm smaller than the shaft. For a sliding or locating fit, match the bore to the shaft diameter exactly. Always verify the outer diameter and width against your housing drawing as well.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat load capacity do POM plastic bearings have compared to steel bearings?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003ePOM bearings carry lower dynamic and static load ratings than equivalent all-steel bearings due to the lower compressive strength of the polymer rings. They are suited for light-to-moderate radial loads at low-to-medium speeds. For heavy radial loads, high-speed spindle applications, or shock-load environments, a steel or stainless steel bearing is more appropriate. Contact us to confirm load suitability for your specific duty cycle.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these bearings suitable for food-contact or washdown environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003ePOM (acetal) is a food-safe polymer approved for incidental food contact in many jurisdictions. The RS rubber seal helps exclude water and light contaminants. For direct food-contact or full washdown applications, confirm that the rolling element material and lubricant are also food-grade rated. Contact us to confirm the specific configuration available for your compliance requirements.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the maximum operating temperature for POM bearings?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003ePOM (polyoxymethylene) begins to soften and lose dimensional stability above approximately 80°C (176°F) under sustained load. For applications with operating temperatures above this threshold — such as near motors, ovens, or steam lines — a PEEK, ceramic, or stainless steel bearing is recommended instead. Short-term peak temperatures up to approximately 100°C may be tolerable without load, but sustained operation above 80°C is not advised.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these bearings in wet or submerged conditions?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003ePOM rings are inherently corrosion-resistant and absorb minimal moisture, making them suitable for damp and splash environments. The RS rubber seal provides additional protection against water ingress. For fully submerged or high-pressure washdown applications, verify that the rolling element material (steel vs. stainless) and lubricant are compatible with continuous water exposure. Stainless rolling elements are recommended for prolonged wet service.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre POM bearings interchangeable with standard steel deep-groove bearings of the same bore size?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003ePOM deep-groove ball bearings are manufactured to the same dimensional standards as steel equivalents (ISO 15, 6000, 6200, or 6300 series depending on bore and OD), so they are dimensionally interchangeable in most housings. However, load ratings, speed limits, and temperature ranges differ. Always verify that the POM bearing's rated capacity meets your application requirements before substituting for a steel unit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo these bearings require additional lubrication after installation?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese bearings are factory-greased and sealed with an RS rubber contact seal, so they are ready to install without additional lubrication in most applications. POM's inherent low-friction surface also reduces grease consumption. For extended service intervals or high-cycle applications, inspect the bearing periodically and regrease if the seal allows access, or replace the bearing when noise or play increases.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your bore size and quantity above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"RS \/ 608-8*22*7mm \/ 1","offer_id":52409802883346,"sku":"GLFBMWXGLSMZC0125x1","price":6.68,"currency_code":"USD","in_stock":true},{"title":"RS \/ 608-8*22*7mm \/ 5","offer_id":52409802916114,"sku":"GLFBMWXGLSMZC0125x5","price":18.9,"currency_code":"USD","in_stock":true},{"title":"RS \/ 608-8*22*7mm \/ 10","offer_id":52409802948882,"sku":"GLFBMWXGLSMZC0125x10","price":36.65,"currency_code":"USD","in_stock":true},{"title":"RS \/ 608-8*22*7mm \/ 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