{"id":9830,"date":"2025-03-27T06:05:52","date_gmt":"2025-03-27T06:05:52","guid":{"rendered":"https:\/\/www.skf-eu.com\/?post_type=product&#038;p=9830"},"modified":"2025-04-24T08:06:32","modified_gmt":"2025-04-24T08:06:32","slug":"single-row-four-point-contact-ball-bearings","status":"publish","type":"product","link":"https:\/\/www.skf-eu.com\/fr\/produit\/single-row-four-point-contact-ball-bearings\/","title":{"rendered":"Roulements \u00e0 billes \u00e0 contact quadruple \u00e0 une rang\u00e9e"},"content":{"rendered":"<h2>Introduction to single-row four-point contact ball bearings<\/h2>\n<p><a href=\"https:\/\/www.skf-eu.com\/product\/single-row-four-point-contact-ball-bearings\/\"><strong>Single-row four-point contact ball bearings<\/strong><\/a> are a common rotating support element, characterized by a four-point contact structure between the inner and outer ring raceways and a single row of steel balls. This design enables it to withstand radial, axial and overturning moments at the same time, and has a compact design, high load capacity and excellent rotation performance, so it is widely used in a variety of equipment that requires support and rotation.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-9835 aligncenter\" data-src=\"https:\/\/www.skf-eu.com\/wp-content\/uploads\/2025\/03\/Four-point-contact-ball-slewing-bearings4.webp\" alt=\"Single row four point contact ball bearings\" width=\"486\" height=\"486\" srcset=\"https:\/\/www.skf-eu.com\/wp-content\/uploads\/2025\/03\/Four-point-contact-ball-slewing-bearings4.webp 486w, https:\/\/www.skf-eu.com\/wp-content\/uploads\/2025\/03\/Four-point-contact-ball-slewing-bearings4-480x480.webp 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 486px, 100vw\" \/><\/p>\n<h2>Common models and parameter list<\/h2>\n<p>Single-row four-point contact ball bearing models are classified according to size, load capacity and specific application scenarios. The following are some typical models and their parameters for reference:<\/p>\n<p>Model Inner diameter (mm) Outer diameter (mm) Height (mm) Dynamic load (kN) Static load (kN) Limiting speed (rpm)<\/p>\n<ul>\n<li>QJ204 20 47 14 12.5 6.8 9000<\/li>\n<li>QJ206 30 62 16 19.5 10.5 7500<\/li>\n<li>QJ208 40 80 18 28.5 15.5 6300<\/li>\n<li>QJ210 50 90 20 35.0 19.0 5600<\/li>\n<li>QJ212 60 110 22 45.0 25.0 4800<\/li>\n<li>QJ215 75 130 25 60.0 35.0 4000<\/li>\n<li>QJ218 90 160 30 85.0 50.0 3400<\/li>\n<li>QJ220 100 180 34 100.0 60.0 3000<\/li>\n<\/ul>\n<p><strong>Note: The data is for reference only. The specific parameters need to be confirmed according to different manufacturers or design specifications.<\/strong><\/p>\n<h2>Analysis of typical application fields<\/h2>\n<p>Due to its compact structure, strong load-bearing capacity and flexible operation, single-row four-point contact ball bearings are widely used in the following industries:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-9834 aligncenter\" data-src=\"https:\/\/www.skf-eu.com\/wp-content\/uploads\/2025\/03\/application-of-Slewing-Ring-Bearings.webp\" alt=\"Single row four point contact ball bearings\" width=\"597\" height=\"398\" \/><\/p>\n<h3>Engineering machinery<\/h3>\n<ul>\n<li>Application scenarios: excavators, cranes, concrete pump trucks, etc.<\/li>\n<li>Function: Support rotating platforms and withstand complex mechanical loads.<\/li>\n<li>Features: Simple design, quick installation, and can meet high load requirements.<\/li>\n<\/ul>\n<h3>Wind power generation equipment<\/h3>\n<ul>\n<li>Application scenarios: Yaw system of wind turbines.<\/li>\n<li>Function: Support tower rotation and resist wind and overturning loads.<\/li>\n<li>Features: High long-term operating reliability, suitable for harsh working conditions.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-9836 aligncenter\" data-src=\"https:\/\/www.skf-eu.com\/wp-content\/uploads\/2025\/03\/Slewing-Ring-Bearings-for-Wind-power.webp\" alt=\"Single row four point contact ball bearings\" width=\"547\" height=\"281\" srcset=\"https:\/\/www.skf-eu.com\/wp-content\/uploads\/2025\/03\/Slewing-Ring-Bearings-for-Wind-power.webp 313w, https:\/\/www.skf-eu.com\/wp-content\/uploads\/2025\/03\/Slewing-Ring-Bearings-for-Wind-power-300x154.webp 300w, https:\/\/www.skf-eu.com\/wp-content\/uploads\/2025\/03\/Slewing-Ring-Bearings-for-Wind-power-18x9.webp 18w\" sizes=\"(max-width: 547px) 100vw, 547px\" \/><\/p>\n<h3>Mat\u00e9riel m\u00e9dical<\/h3>\n<ul>\n<li>Application scenarios: CT scanners, X-ray machines, etc.<\/li>\n<li>Function: Provide rotation support to ensure accurate positioning.<\/li>\n<li>Features: Low noise, high precision, suitable for medical environment needs.<\/li>\n<\/ul>\n<h3>Industrial robots<\/h3>\n<ul>\n<li>Application scenarios: Robot joints, rotation modules.<\/li>\n<li>Function: Achieve high-precision rotation and positioning.<\/li>\n<li>Features: Small footprint, strong flexibility.<\/li>\n<\/ul>\n<h3>Defense equipment<\/h3>\n<ul>\n<li>Application scenarios: Radar antennas, missile launchers, etc.<\/li>\n<li>Function: Support rotating structures and adapt to complex mechanical conditions.<\/li>\n<li>Features: High load capacity, suitable for extreme environments.<\/li>\n<\/ul>\n<h2>R\u00e9sum\u00e9<\/h2>\n<p>Single-row four-point contact ball bearings are a comprehensive performance bearing with the following advantages:<\/p>\n<ol>\n<li>Compact structural design: Single-row steel ball layout, small footprint.<\/li>\n<li>High load capacity: Can withstand multiple mechanical loads at the same time.<\/li>\n<li>Excellent running performance: Low friction, suitable for high-speed operation.<\/li>\n<li>Wide range of applications: Engineering machinery, wind power equipment, medical instruments, robots and military equipment.<\/li>\n<\/ol>\n<p>When selecting such <a href=\"https:\/\/www.skf-eu.com\/category\/slewing-ring-bearings\/\"><strong>Roulements de bagues d'orientation<\/strong><\/a>, the actual working environment, load requirements and precision requirements should be considered comprehensively to ensure that they meet the performance and life requirements of equipment operation.<\/p>","protected":false},"excerpt":{"rendered":"<p><strong>Features:<\/strong><\/p>\n<ul>\n<li>Four-point contact<\/li>\n<li>Capacit\u00e9 de charge \u00e9lev\u00e9e<\/li>\n<li>Space-saving<\/li>\n<li>Grande rigidit\u00e9<\/li>\n<li>Easy installation<\/li>\n<\/ul>\n<p><strong>Application areas:<\/strong><\/p>\n<ul>\n<li>Construction machinery<\/li>\n<li>Wind power generation<\/li>\n<li>Mat\u00e9riel m\u00e9dical<\/li>\n<li>Industrial robots<\/li>\n<li>A\u00e9rospatiale<\/li>\n<\/ul>","protected":false},"featured_media":9831,"template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_cat":[252],"product_tag":[275],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.0 - 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