Options, Special Designs and Systems

Bearings, factory preloaded to your specifications. Instead of just the general Preload Classes, L-M-H (in a relation 1:3:6), we can provide specific force-value based preloads (e. g., Super-Light). Improved dimensional tolerances, even to 2...3 µm (d, D), upon application. Values are marked on the bearings. Marking on face, showing point of max. radial runout. Bearing Sets marked on the outer diameter. Special Precision Beyond P2/ABEC 9, there is HQ-Precision; radial runout of Inner Ring of 1.0...1.5 µm! Separate precision for Inner/Outer Ring (IR/AR), to help optimize the bearings for the application. Special Grease lubricants for high speed applications Spindle Bearings and High Speed Spindle Bearings are available with cover shields (2Z) integrated in the Outer Ring as contactless seals. With lifetime Grease lubrication ready for installation. Cages made of special plastics or solid (brass) materials, cages impregnated with dry lubricants for emergencies. Inner/Outer Rings with special coatings, for Maintenance-free and extreme conditions, e. g., space. Bearings made of special alloy steels, with increased toughness (i.e. CRONIDEX) for higher speeds and longer life. Custom designed, internal geometry, including special race geometry, contact angle, etc. Special Dimensions Slim Line Spindle Bearings, for limited space, e. g., d = 62 mm, D = 74 mm, two row, preloaded. Double row, headstock spindle bearings up to 240 mm ID: internal grinding of large work pieces. Active bearing-preload monitoring and adjusting system; continuous preload optimizing. Depending on the application, bearing preload is selected for either high speeds (light preload), or heavy loads (medium or heavy preload). Applications with varying speed and load conditions benefit from a variable preload system, because both productivity and quality can be optimized. UKF's VARIORING system uses "USO"-type Spindle Bearings, which are encirled by an hydraulic boundary ring. This reduces the housing clearence, increasing the preload inside the bearing. Adjustments are made without additional mechanical components, and without affecting the rigidity and location of the axis of rotation. Preload can be increased or decreased, depending on the speed of the machine.