{"product_id":"mounted-ball-bearings-two-bolt-flange-kirsite-8mm-35mm","title":"Mounted Ball Bearings With Two-Bolt Flange Kirsite Bore Diameter 8mm To 35mm","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eTwo-Bolt Flange Mounted Ball Bearings — Kirsite Housing, Bore 8mm to 35mm\u003c\/h2\u003e\n\u003cp\u003eWhen a shaft needs reliable radial support in a compact, bolt-down package, a loose bearing alone won't cut it. Maintenance technicians, machine builders, and DIY fabricators working on conveyor frames, agricultural equipment, and light industrial assemblies need a mounted unit that installs fast, stays put, and tolerates the occasional splash or dust exposure. These two-bolt flange mounted ball bearings deliver exactly that — a pre-assembled bearing-in-housing solution ready to bolt onto any flat surface.\u003c\/p\u003e\n\u003cp\u003eEach unit consists of a deep-groove ball bearing insert pressed into a kirsite (zinc alloy die-cast) two-bolt flange housing. Two series are available: the KFL series (oval flange plate) and the KP series (round flange plate), covering bore diameters from 8mm (~0.31 in) to 35mm (~1.38 in). The set-screw locking collar secures the shaft directly inside the bore, and the two mounting holes accept standard bolts for rigid surface attachment.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include light conveyor roller shafts, fan and blower shaft supports, small agricultural machinery pivot points, and DIY workshop jigs where a bolt-down bearing block is needed. The KFL oval flange suits narrow mounting rails, while the KP round flange works well on flat plates and brackets — making these two-bolt flange mounted ball bearings a versatile choice across multiple project types.\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 round shafts matching the selected bore diameter. KFL series uses an oval two-bolt flange; KP series uses a round two-bolt flange. Confirm shaft diameter and bolt-hole spacing before ordering.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These Two-Bolt Flange Mounted Ball Bearings\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-list\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e \u003cstrong\u003eTwo-Bolt Flange Design\u003c\/strong\u003e\n\u003cp\u003eOval (KFL) or round (KP) flange plate with two bolt holes allows rigid, vibration-resistant mounting to any flat surface without additional brackets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🏗️\u003c\/span\u003e \u003cstrong\u003eKirsite Zinc Alloy Housing\u003c\/strong\u003e\n\u003cp\u003eDie-cast kirsite housing offers a favorable strength-to-weight ratio and resists light corrosion from moisture and dust in indoor or sheltered outdoor environments.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e \u003cstrong\u003eWide Bore Range: 8mm to 35mm\u003c\/strong\u003e\n\u003cp\u003eNine bore sizes per series (8 \/ 10 \/ 12 \/ 15 \/ 17 \/ 20 \/ 25 \/ 30 \/ 35mm) cover the majority of light-duty shaft diameters used in conveyor, fan, and fabrication applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔒\u003c\/span\u003e \u003cstrong\u003eSet-Screw Shaft Locking\u003c\/strong\u003e\n\u003cp\u003eIntegrated set-screw collar locks the bearing insert onto the shaft without requiring a machined shoulder, simplifying installation on plain round bar stock.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e \u003cstrong\u003eDeep-Groove Ball Bearing Insert\u003c\/strong\u003e\n\u003cp\u003eThe inner bearing insert handles radial loads and limited axial loads in both directions, suitable for moderate-speed, light-to-medium duty rotating shaft applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e \u003cstrong\u003eSingle or 5-Pack Quantity Options\u003c\/strong\u003e\n\u003cp\u003eAvailable in 1-piece or 5-piece packs — order a single unit for a repair job or a 5-pack for multi-point shaft support on longer conveyor or drive systems.\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 — Two-Bolt Flange Mounted Ball Bearings\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSeries\u003c\/th\u003e\n\u003ctd\u003eKFL (oval flange) \/ KP (round flange)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter Range\u003c\/th\u003e\n\u003ctd\u003e8mm – 35mm (0.31 in – 1.38 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Bore Sizes\u003c\/th\u003e\n\u003ctd\u003e8 \/ 10 \/ 12 \/ 15 \/ 17 \/ 20 \/ 25 \/ 30 \/ 35mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHousing Material\u003c\/th\u003e\n\u003ctd\u003eKirsite (zinc alloy die-cast)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBearing Insert Type\u003c\/th\u003e\n\u003ctd\u003eDeep-groove ball bearing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShaft Locking Method\u003c\/th\u003e\n\u003ctd\u003eSet screw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNumber of Mounting Bolts\u003c\/th\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFlange Style\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOverall Housing Width\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBolt Hole Spacing\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLoad Type\u003c\/th\u003e\n\u003ctd\u003eRadial; limited axial (both directions)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLubrication\u003c\/th\u003e\n\u003ctd\u003ePre-lubricated (grease-filled)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePacking Quantity\u003c\/th\u003e\n\u003ctd\u003e1 Pcs or 5 Pcs (see 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 between the KFL series and the KP series?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe KFL series features an oval two-bolt flange plate, which is narrower and fits better on mounting rails or channels with limited width. The KP series uses a round two-bolt flange plate, which provides a larger footprint and is better suited for flat plates, brackets, or surfaces where bolt-hole placement flexibility matters. Both series share the same bore sizes and locking mechanism — the choice comes down to your mounting surface geometry.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat shaft diameter should I order for my application?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eOrder the bore size that matches your shaft's outer diameter exactly. For example, if your shaft is 20mm in diameter, select the 20mm bore variant (KFL004 or KP004). A bore that is too large will allow the shaft to wobble even with the set screw tightened; a bore that is too small will not accept the shaft. If your shaft is in inches, convert to millimeters first (1 inch = 25.4mm) and select the closest available bore size.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow strong is the kirsite housing compared to cast iron or steel?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eKirsite (zinc alloy) housing is lighter than cast iron and adequate for light-to-medium duty applications such as conveyor rollers, fans, and small agricultural equipment. It is not recommended for heavy shock loads, high-vibration industrial machinery, or applications where the housing itself bears significant structural load. For heavy-duty environments, consider cast iron or pressed-steel housed units instead.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these bearings suitable for outdoor or wet environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe kirsite housing resists light moisture and dust exposure in sheltered outdoor settings. However, these units are not rated for continuous immersion, washdown environments, or highly corrosive atmospheres. For outdoor use, ensure the bearing is shielded from direct rain and consider applying a light coat of grease around the housing seam to extend service life. For fully wet or corrosive environments, stainless steel housed units are a more appropriate choice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these bearings on a shaft that doesn't have a machined shoulder or keyway?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. The set-screw locking collar is designed to grip plain round bar stock directly, so no machined shoulder, keyway, or snap-ring groove is required. Tighten the set screw firmly against the shaft using the appropriate hex key. For best results, ensure the shaft surface is clean and free of oil or grease at the locking point before tightening.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eShould I order 1-piece or the 5-pack?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eOrder a single unit if you need one bearing point — for example, replacing a failed unit on an existing machine or supporting one end of a short shaft. Choose the 5-pack if your project requires multiple support points along a conveyor, drive shaft, or multi-roller assembly, or if you want to keep spares on hand for maintenance. The 5-pack offers a lower per-unit cost compared to buying five individual pieces separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your Size and Packing Quantity above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"KFL08(8mm) \/ 1Pcs","offer_id":52409758581010,"sku":"GLFBXXQSHXJZC0145x1","price":7.19,"currency_code":"USD","in_stock":true},{"title":"KFL08(8mm) \/ 5Pcs","offer_id":52409758613778,"sku":"GLFBXXQSHXJZC0145x5","price":22.85,"currency_code":"USD","in_stock":true},{"title":"KFL000(10mm) \/ 1Pcs","offer_id":52409758646546,"sku":"GLFBXXQSHXJZC0146x1","price":7.37,"currency_code":"USD","in_stock":true},{"title":"KFL000(10mm) \/ 5Pcs","offer_id":52409758679314,"sku":"GLFBXXQSHXJZC0146x5","price":28.17,"currency_code":"USD","in_stock":true},{"title":"KFL001(12mm) \/ 1Pcs","offer_id":52409758712082,"sku":"GLFBXXQSHXJZC0147x1","price":8.26,"currency_code":"USD","in_stock":true},{"title":"KFL001(12mm) \/ 5Pcs","offer_id":52409758744850,"sku":"GLFBXXQSHXJZC0147x5","price":32.88,"currency_code":"USD","in_stock":true},{"title":"KFL002(15mm) \/ 1Pcs","offer_id":52409758777618,"sku":"GLFBXXQSHXJZC0148x1","price":9.76,"currency_code":"USD","in_stock":true},{"title":"KFL002(15mm) \/ 5Pcs","offer_id":52409758810386,"sku":"GLFBXXQSHXJZC0148x5","price":40.39,"currency_code":"USD","in_stock":true},{"title":"KFL003(17mm) \/ 1Pcs","offer_id":52409758843154,"sku":"GLFBXXQSHXJZC0149x1","price":12.54,"currency_code":"USD","in_stock":true},{"title":"KFL003(17mm) \/ 5Pcs","offer_id":52409758875922,"sku":"GLFBXXQSHXJZC0149x5","price":54.26,"currency_code":"USD","in_stock":true},{"title":"KFL004(20mm) \/ 1Pcs","offer_id":52409758908690,"sku":"GLFBXXQSHXJZC0150x1","price":16.7,"currency_code":"USD","in_stock":true},{"title":"KFL004(20mm) \/ 5Pcs","offer_id":52409758941458,"sku":"GLFBXXQSHXJZC0150x5","price":85.26,"currency_code":"USD","in_stock":true},{"title":"KFL005(25mm) \/ 1Pcs","offer_id":52409758974226,"sku":"GLFBXXQSHXJZC0151x1","price":19.6,"currency_code":"USD","in_stock":true},{"title":"KFL005(25mm) \/ 5Pcs","offer_id":52409759006994,"sku":"GLFBXXQSHXJZC0151x5","price":101.46,"currency_code":"USD","in_stock":true},{"title":"KFL006(30mm) \/ 1Pcs","offer_id":52409759039762,"sku":"GLFBXXQSHXJZC0152x1","price":27.43,"currency_code":"USD","in_stock":true},{"title":"KFL006(30mm) \/ 5Pcs","offer_id":52409759072530,"sku":"GLFBXXQSHXJZC0152x5","price":146.19,"currency_code":"USD","in_stock":true},{"title":"KFL007(35mm) \/ 1Pcs","offer_id":52409759105298,"sku":"GLFBXXQSHXJZC0153x1","price":44.4,"currency_code":"USD","in_stock":true},{"title":"KFL007(35mm) \/ 5Pcs","offer_id":52409759138066,"sku":"GLFBXXQSHXJZC0153x5","price":240.48,"currency_code":"USD","in_stock":true},{"title":"KP08 (8mm) \/ 1Pcs","offer_id":52409759170834,"sku":"GLFBXXQSHXJZC0154x1","price":7.33,"currency_code":"USD","in_stock":true},{"title":"KP08 (8mm) \/ 5Pcs","offer_id":52409759203602,"sku":"GLFBXXQSHXJZC0154x5","price":22.79,"currency_code":"USD","in_stock":true},{"title":"KP000(10mm) \/ 1Pcs","offer_id":52409759236370,"sku":"GLFBXXQSHXJZC0155x1","price":8.35,"currency_code":"USD","in_stock":true},{"title":"KP000(10mm) \/ 5Pcs","offer_id":52409759269138,"sku":"GLFBXXQSHXJZC0155x5","price":33.29,"currency_code":"USD","in_stock":true},{"title":"KP001(12mm) \/ 1Pcs","offer_id":52409759301906,"sku":"GLFBXXQSHXJZC0156x1","price":9.29,"currency_code":"USD","in_stock":true},{"title":"KP001(12mm) \/ 5Pcs","offer_id":52409759334674,"sku":"GLFBXXQSHXJZC0156x5","price":38.05,"currency_code":"USD","in_stock":true},{"title":"KP002(15mm) \/ 1Pcs","offer_id":52409759367442,"sku":"GLFBXXQSHXJZC0157x1","price":12.0,"currency_code":"USD","in_stock":true},{"title":"KP002(15mm) \/ 5Pcs","offer_id":52409759400210,"sku":"GLFBXXQSHXJZC0157x5","price":51.54,"currency_code":"USD","in_stock":true},{"title":"KP003(17mm) \/ 1Pcs","offer_id":52409759432978,"sku":"GLFBXXQSHXJZC0158x1","price":13.45,"currency_code":"USD","in_stock":true},{"title":"KP003(17mm) \/ 5Pcs","offer_id":52409759465746,"sku":"GLFBXXQSHXJZC0158x5","price":66.45,"currency_code":"USD","in_stock":true},{"title":"KP004(20mm) \/ 1Pcs","offer_id":52409759498514,"sku":"GLFBXXQSHXJZC0159x1","price":19.86,"currency_code":"USD","in_stock":true},{"title":"KP004(20mm) \/ 5Pcs","offer_id":52409759531282,"sku":"GLFBXXQSHXJZC0159x5","price":103.09,"currency_code":"USD","in_stock":true},{"title":"KP005(25mm) \/ 1Pcs","offer_id":52409759564050,"sku":"GLFBXXQSHXJZC0160x1","price":21.88,"currency_code":"USD","in_stock":true},{"title":"KP005(25mm) \/ 5Pcs","offer_id":52409759596818,"sku":"GLFBXXQSHXJZC0160x5","price":114.17,"currency_code":"USD","in_stock":true},{"title":"KP006(30mm) \/ 1Pcs","offer_id":52409759629586,"sku":"GLFBXXQSHXJZC0161x1","price":32.71,"currency_code":"USD","in_stock":true},{"title":"KP006(30mm) \/ 5Pcs","offer_id":52409759662354,"sku":"GLFBXXQSHXJZC0161x5","price":176.57,"currency_code":"USD","in_stock":true},{"title":"KP007(35mm) \/ 1Pcs","offer_id":52409759695122,"sku":"GLFBXXQSHXJZC0162x1","price":47.02,"currency_code":"USD","in_stock":true},{"title":"KP007(35mm) \/ 5Pcs","offer_id":52409759727890,"sku":"GLFBXXQSHXJZC0162x5","price":255.12,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-02_e780e1b8-2ec7-4e93-8a4b-8087052e0c9f.jpg?v=1782230131","url":"https:\/\/homediyer.com\/de\/products\/mounted-ball-bearings-two-bolt-flange-kirsite-8mm-35mm","provider":"HomeDIYer","version":"1.0","type":"link"}