10pcs F684 4x9x4mm DDLF940ZZ ABEC7 deep groove ball bearings are compact, precision bearings designed for reliable lowfriction rotation in small assemblies. Shielded on both sides (ZZ), these bearings provide protection against dust and debris while maintaining smooth operation at speeds. Key benefits precision ABEC7 tolerance for smooth, consistent performance and repeatable results ZZ shielding on both sides for effective protection against contaminants Compact 4x9x4 mm size fits tight spaces in small devices Durable bearing steel construction delivers reliable longterm operation Versatile and easy to integrate into a variety of small mechanisms Pack includes 10 pieces for easy replenishment and multiple applications Key specifications Model: DDLF940ZZ Bearing type: Deep groove ball bearing Size: 4x9x4 mm (bore 4 mm, outer diameter 9 mm, width 4 mm) Precision: ABEC7 Shielding: ZZ (shielded on both sides) Material: quality bearing steel Quantity: 10 pieces Attributes and compatibility Functionality: Deep groove design supports radial and axial loads with low friction and rotational efficiency Compatibility: Suitable for small motors, compact gear mechanisms, hobby electronics, and other micromechanisms requiring precise, durable bearings Size and fit: 4 mm bore, 9 mm outer diameter, 4 mm width for tight assemblies Performance: ABEC7 precision class for stable speed and reduced runout across suitable operating ranges Applications Replacement bearings in small DC motors, hobby robotics, and micro actuators Components in compact 3D printer assemblies, such as extruder drives or small gearheads Part of lightweight, precision gearboxes or instrumentation where space is constrained Notes See product title for exact specifications: F684 4x9x4 mm, model DDLF940ZZ, ABEC7, deep groove ball bearing, ZZ shielded, quantity 10 Built for reliable performance in compact, precisiondriven applications Suitable for hobbyists and professionals seeking consistent, longlasting bearings in smallformfactor projects