{"product_id":"3mm-10mm-bore-miniature-plane-thrust-ball-bearings-with-grooved-f3-8-to-f10-18","title":"3mm - 10mm Bore Miniature Plane Thrust Ball Bearings with Grooved F3-8 to F10-18","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003ch2\u003eMiniature Plane Thrust Ball Bearings — Precise Axial Load Control for Small-Bore Applications\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003cp\u003eWhen a rotating shaft needs to resist axial (thrust) forces in a compact space, standard radial bearings fall short. Hobbyists building RC vehicles, engineers assembling small gearboxes, and repair technicians servicing precision instruments all face the same challenge: finding a miniature thrust ball bearing that fits a 3–10 mm bore without sacrificing load capacity or dimensional accuracy. These miniature plane thrust ball bearings are engineered specifically for that gap.\u003c\/p\u003e\n\u003cp\u003eEach bearing consists of a grooved upper raceway, a grooved lower raceway, and a ball-and-cage assembly. The grooved raceway design channels axial loads evenly across all rolling elements, reducing point stress and extending service life. Bore sizes range from 3 mm (≈ 0.118 in) to 10 mm (≈ 0.394 in), with outer diameters from 8 mm to 18 mm and thicknesses from 3.5 mm to 5.5 mm depending on the selected variant. Bearing numbers follow the F-series designation (F3-8 through F10-18), making cross-referencing against standard bearing catalogs straightforward.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include axial load management in miniature stepper motor assemblies, thrust support in 3D printer Z-axis lead screw setups, and rotational constraint in small pneumatic or hydraulic valve actuators — all scenarios where a miniature thrust ball bearing for small shaft diameters is the correct engineering choice.\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 applications requiring axial load support on shafts with 3–10 mm diameter. Verify bore, O.D., and thickness against your housing dimensions before ordering. Refer to the Bearing No. (F-series) for catalog cross-referencing.\u003c\/div\u003e\n\u003ch2\u003e✅ Key Features of These Miniature Thrust Ball Bearings\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003cul class=\"hdiy-list\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cstrong\u003eGrooved Raceway Design:\u003c\/strong\u003e Upper and lower raceways feature precision-ground grooves that distribute axial loads evenly across the ball set, reducing localized stress and wear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cstrong\u003eWide Size Range (F3-8 to F10-18):\u003c\/strong\u003e Sixteen bore\/O.D.\/thickness combinations cover shaft diameters from 3 mm to 10 mm, eliminating the need to source multiple bearing families for a single project.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🏗️\u003c\/span\u003e\u003cstrong\u003eCompact Flat Profile:\u003c\/strong\u003e Thickness values of 3.5–7 mm allow installation in axially constrained assemblies where a standard deep-groove bearing would not fit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\u003cstrong\u003eF-Series Designation:\u003c\/strong\u003e Each variant carries a standard F-series bearing number (e.g., F6-14), enabling direct lookup in industry bearing catalogs for dimensional verification and interchangeability checks.\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, or 10-piece packs — order a single piece for prototyping or a 10-pack for production runs and maintenance stock.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\u003cstrong\u003eHardened Steel Construction:\u003c\/strong\u003e Raceways and balls are manufactured from hardened bearing steel, providing the dimensional stability and surface hardness needed for sustained axial loading in rotating machinery.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003ch2\u003e📐 Technical Specifications — Miniature Plane Thrust Ball Bearings\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBearing Type\u003c\/th\u003e\n\u003ctd\u003ePlane (flat) thrust ball bearing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBearing Series\u003c\/th\u003e\n\u003ctd\u003eF-series (F3-8 to F10-18)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter (I.D.)\u003c\/th\u003e\n\u003ctd\u003e3 mm – 10 mm (≈ 0.118 in – 0.394 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Diameter (O.D.)\u003c\/th\u003e\n\u003ctd\u003e8 mm – 20 mm (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThickness\u003c\/th\u003e\n\u003ctd\u003e3.5 mm – 7 mm (see variant options)\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\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eHardened bearing steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRaceway Profile\u003c\/th\u003e\n\u003ctd\u003eGrooved (both upper and lower)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantity Options\u003c\/th\u003e\n\u003ctd\u003e1 Pcs \/ 5 Pcs \/ 10 Pcs\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\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 select the correct bore size for my shaft?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMatch the I.D. (inner diameter) of the bearing to your shaft diameter. For example, if your shaft is 6 mm, select a variant with a 6 mm bore such as F6-12 or F6-14. The O.D. and thickness should then be verified against your housing bore and available axial space. Use the variant option table on this page to compare all available I.D. × O.D. × Thickness combinations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between F6-12 and F6-14 if both have a 6 mm bore?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eBoth share a 6 mm inner diameter, but F6-12 has a 12 mm outer diameter and 4.5 mm thickness, while F6-14 has a 14 mm outer diameter and 5 mm thickness. Choose F6-14 when your housing can accommodate the larger O.D. and you need a slightly wider load-bearing surface. Choose F6-12 when radial space is tighter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan these bearings handle radial (side) loads?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eNo. Plane thrust ball bearings are designed exclusively for axial (thrust) loads — forces acting parallel to the shaft axis. They are not rated for radial loads. If your application involves combined radial and axial loading, a deep-groove ball bearing or angular contact bearing would be more appropriate.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these bearings corrosion-resistant for use in damp environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese bearings are manufactured from hardened bearing steel, which provides good wear resistance but limited inherent corrosion resistance. For damp or wet environments, apply a compatible bearing grease or oil to the raceways and balls before installation, and re-lubricate periodically. For highly corrosive environments, contact us to confirm suitability or discuss stainless steel alternatives.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I verify compatibility with my existing bearing using the F-series number?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe F-series designation (e.g., F7-15) is a standardized bearing number used across major bearing catalogs. Look up the F-series number in any standard bearing reference — the I.D., O.D., and thickness listed there should match the variant dimensions shown on this product page. This makes direct substitution straightforward when replacing a worn bearing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eShould I order 1 Pcs, 5 Pcs, or 10 Pcs?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eOrder 1 Pcs for prototyping, fit-checking, or single-unit repairs. The 5 Pcs pack suits small batch builds or keeping one spare on hand. The 10 Pcs pack offers the best per-unit value for production runs, maintenance kits, or workshop stock where the same bearing size is used across multiple machines.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your I.D. × O.D. × Thickness and quantity above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"3 x 8 x 3.5 mm \/ F3-8 \/ 1 Pcs","offer_id":52409701368082,"sku":"PENG075399x1","price":7.47,"currency_code":"USD","in_stock":true},{"title":"4 x 9 x 4 mm \/ F4-9 \/ 1 Pcs","offer_id":52409701400850,"sku":"PENG075400x1","price":7.6,"currency_code":"USD","in_stock":true},{"title":"4 x 10 x 4 mm \/ F4-10 \/ 1 Pcs","offer_id":52409701433618,"sku":"PENG075401x1","price":7.6,"currency_code":"USD","in_stock":true},{"title":"5 x 10 x 4 mm \/ F5-10 \/ 1 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