{"product_id":"14mm-u-groove-pom-track-wheel-pulley-625zz-bearing-black","title":"14mm U-Groove POM Track Wheel Pulley with 625ZZ Bearing – Black","description":"\n\u003ch2\u003e14mm Black U-Groove Track Wheel Pulley – POM Plastic with 625ZZ Bearing\u003c\/h2\u003e\n\u003cp\u003eThis compact and durable \u003cstrong\u003e14mm diameter U-groove track wheel pulley\u003c\/strong\u003e is built for smooth, reliable performance across a wide range of mechanical applications. Machined from high-strength \u003cstrong\u003ePOM (Polyoxymethylene)\u003c\/strong\u003e — a self-lubricating engineering plastic known for its rigidity and low friction — and fitted with a precision \u003cstrong\u003e625ZZ high-quality bearing steel\u003c\/strong\u003e core, this pulley delivers consistent motion with minimal wear.\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e POM Polyoxymethylene (hard engineering plastic) with rubber-coated outer track\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBearing Model:\u003c\/strong\u003e 625ZZ high-quality bearing steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 5 × 16 × 5 mm (inner diameter × outer diameter × width)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Wheel Diameter:\u003c\/strong\u003e 14 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGroove Profile:\u003c\/strong\u003e U-shaped\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax Speed:\u003c\/strong\u003e Below 790 RPM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight Bearing Capacity:\u003c\/strong\u003e Up to 77 kg\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Contents:\u003c\/strong\u003e 1 × Track Wheel Pulley\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Choose This Track Wheel?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Strength Construction:\u003c\/strong\u003e POM plastic is renowned for its excellent stiffness, dimensional stability, and resistance to abrasion — making it ideal for repeated mechanical use.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecision 625ZZ Bearing:\u003c\/strong\u003e The sealed steel bearing at the core ensures smooth rotation, reduces friction, and extends the service life of the pulley.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRubber-Coated Outer Ring:\u003c\/strong\u003e The rubber coating provides a secure grip on tracks, reduces vibration, and protects guide surfaces from scoring.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eU-Groove Design:\u003c\/strong\u003e The precisely formed U-shaped groove tracks securely on rails, wires, or ropes, preventing slippage during operation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact \u0026amp; Versatile:\u003c\/strong\u003e Small enough to fit into tight mechanical assemblies, yet rated for up to 77 kg load — delivering a strong performance-to-size ratio.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCommon Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eConveyor belt systems\u003c\/li\u003e\n  \u003cli\u003eSliding doors and window track guides\u003c\/li\u003e\n  \u003cli\u003e3D printer and CNC gantry carriages\u003c\/li\u003e\n  \u003cli\u003eBicycle and cable pulley assemblies\u003c\/li\u003e\n  \u003cli\u003eMobile viewing windows and display racks\u003c\/li\u003e\n  \u003cli\u003eDIY mechanical projects and automation builds\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Find Useful\u003c\/h3\u003e\n\u003cp\u003eLooking for more hardware and workshop essentials? Check out these items from our store:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003ca href=\"\/products\/1pc-10g-high-grade-silicon-grease-lubricant-o-lubrication-good-odorless-smoothness-for-o-rings-tube-silicone-grease-lubricant\"\u003e1PC 10g High Grade Silicon Grease Lubricant for O-Rings \u0026amp; Tubes\u003c\/a\u003e — ideal for maintaining smooth bearing and pulley action.\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/products\/3pcs-silicone-sealant-scraper-set-multi-functional-caulking-nozzle-tools-for-tile-floor-joints-grout-finishing-and-renovation\"\u003e3PCS Silicone Sealant Scraper Set – Multi-Functional Caulking Nozzle Tools\u003c\/a\u003e — great for finishing mechanical installations.\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/products\/1-pc-adjustable-invisible-zipper-guide-presser-foot-t69-for-single-needle-lockstitch-industrial-sewing-machine-accessories-parts\"\u003eAdjustable Invisible Zipper Guide Presser Foot for Industrial Sewing Machines\u003c\/a\u003e — another quality mechanical accessory for precision tasks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eMade in Mainland China.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eNote: Due to manual measurement, please allow a tolerance of 1–3 mm. Monitor colour settings may slightly affect the appearance of images; the actual product may vary slightly from photos shown.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/hand-power-tools\" target=\"_blank\" rel=\"noopener\"\u003eOSHA guidance on hand and power tools\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What material is the 14mm U-groove track wheel pulley made from?\u003c\/h4\u003e\n\u003cp\u003eA: The pulley body is made from \u003cstrong\u003ePOM (Polyoxymethylene)\u003c\/strong\u003e, a high-strength engineering plastic valued for its hardness, low friction, and dimensional stability. The outer track features a rubber coating for improved grip and surface protection, and the inner bearing is a \u003cstrong\u003e625ZZ sealed steel bearing\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch4\u003eQ: What is the maximum load and speed rating for this pulley?\u003c\/h4\u003e\n\u003cp\u003eA: This 14mm track wheel pulley is rated for a \u003cstrong\u003emaximum weight bearing of 77 kg\u003c\/strong\u003e and a \u003cstrong\u003emaximum operating speed of below 790 RPM\u003c\/strong\u003e, making it suitable for low-to-medium speed mechanical applications.\u003c\/p\u003e\n\u003ch4\u003eQ: What applications is this U-groove pulley suitable for?\u003c\/h4\u003e\n\u003cp\u003eA: This pulley is widely used in \u003cstrong\u003econveyor belt systems, sliding doors, window track guides, 3D printers, CNC machines, bicycle cable assemblies\u003c\/strong\u003e, and general DIY mechanical or automation projects. The U-groove profile ensures secure tracking on rails and cables.\u003c\/p\u003e\n\u003ch4\u003eQ: Is the 625ZZ bearing replaceable or pre-installed?\u003c\/h4\u003e\n\u003cp\u003eA: The \u003cstrong\u003e625ZZ bearing is pre-installed\u003c\/strong\u003e within the POM pulley body. It is a standard bearing size, so if ever needed, a replacement 625ZZ bearing can be sourced easily from most bearing or hardware suppliers.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What material is the 14mm U-groove track wheel pulley made from?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The pulley body is made from POM (Polyoxymethylene), a high-strength engineering plastic valued for its hardness, low friction, and dimensional stability. 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