NewBee Machinery is a professional machinery parts manufacturer providing high quality precision bearings, high-quality non-standard transmission components, and intelligent CNC equipment and more.
NewBee Machinery is a professional machinery parts manufacturer providing high quality precision bearings, high-quality non-standard transmission components, and intelligent CNC equipment and more.
RB Crossed Roller Bearings are high-precision components featuring cylindrical rollers arranged at 90°angles in alternating directions.This allows a single bearing to handle radial,axial,and moment loads simultaneously,making them ideal for compact,high-stiffness applications like robotics,CNC rotary tables,and medical equipment.Available precision grades cover P5,P4 and P2;inner diameter ranges from 30mm to 1250mm while cross-section height varies between 8mm and 110mm.The rings and rollers are manufactured from GCr15 high-carbon chrome steel with surface hardness HRC 60-62 or corrosion-resistant SUS440C stainless steel,and nylon 66 serves as lightweight bearing cage material.Two sealing options are available:standard open type for clean environment and UU/U contact rubber seal to block dust and liquid splashing with industrial heavy-duty grease lubrication.
Rotary bases of grinding machines and heavy vertical lathes are core rotary functional assemblies of heavy-duty metal-cutting machine tools,widely used in heavy machinery,energy equipment and large auto part processing industries.These turntable bases bear huge dead weight of large castings and forgings,as well as periodic alternating impact loads generated during rough turning,finish turning and precision grinding operations.In most structural designs,the main spindle of the rotary base is pre-fitted with reducers and transmission gears before bearing installation,which brings great assembly obstacles to traditional integral bearings.Meanwhile,the processing workshop is filled with cutting fluid splash,iron scraps and oil mist,requiring the matched bearings to have outstanding load capacity,structural rigidity,precision and reliable sealing performance.The machining flatness and dimensional accuracy of finished workpieces directly depend on the stable running performance of the base supporting bearings.
Multi-Directional Load Capacity:Unlike standard ball bearings,the crossed arrangement empowers the RB series to accommodate loads from all directions at once.
High Rigidity and Precision:The integration of a preload adjusts the bearing clearance,eliminating internal gaps and allowing for high rotational accuracy and minimal deformation under heavy loads.
Compact Space-Saving Profile:Because one crossed bearing replaces multiple conventional ball or roller bearings,they are exceptionally well-suited for tight,space-constrained assemblies.
Smooth Rotation:Spacer retainers separate the rollers,preventing them from skewing and eliminating friction between rolling elements for a stable,low-torque motion.
Industrial Robotics & Automation:Used in basic motion parts like rotary joints,waists,and wrists for smooth and precise motion control.
Precision Machine Tools:Utilized in the rotating tables of machining centers,rotary units of manipulators,and indexing heads to handle heavy,spinning components.
Medical Equipment:Deployed in sophisticated imaging components like MRI machines,CT scanners,and surgical robots to provide smooth,accurate,and vibration-free movement.
Semiconductor & IC Manufacturing:Provide micron-scale accuracy for wafer handling equipment,photolithography machines,and cleanroom pick-and-place systems.
Optical & Measuring Instruments:Essential for the tracking accuracy of astronomical telescopes,radar antennas,and Coordinate Measuring Machines (CMM).
RB crossed roller bearings act as irreplaceable core supporting parts for grinder and heavy vertical lathe rotary bases,directly determining machining precision and long-term equipment stability.
Split Outer Ring Simplifies Base Assembly:Separable outer ring can be installed around pre-assembled spindle with gears and reducers without disassembling existing transmission parts,greatly shortening machine assembly cycle and lowering production cost.
Integrated Multi-load Bearing Optimizes Base Layout:One single RB replaces multiple bearing sets to bear workpiece weight,axial clamping force and cutting overturning moment simultaneously,simplifying the internal mechanical layout of turntable.
Ultra-high Rigidity Suppresses Cutting Vibration:Superior structural rigidity restrains turntable deflection caused by heavy cutting impact,avoiding workpiece surface chatter mark and dimensional out-of-tolerance.
High Precision Ensures Finishing Quality:P4/P2 high precision controls tiny rotational wobble to guarantee high flatness and dimensional precision of ground/lathed large workpieces.
Diversified Sealing Adapts Harsh Cutting Environment:UU rubber sealing effectively prevents cutting liquid and iron filings from entering bearing cavity;SUS440C stainless steel customized option is available for corrosive coolant working conditions.
Excellent Wear Resistance Reduces Unplanned Downtime:Surface-hardened bearing components support 24-hour uninterrupted heavy-duty machining,decreasing regular maintenance and improving workshop production efficiency.
Newbeetrans is a professional RB crossed roller bearing manufacturer,supplying tailor-made bearing solutions for grinder and heavy vertical lathe rotary bases and various heavy precision equipment.
Machine Tool Special Customization:Develop high-rigidity,zero-backlash RB bearings with enhanced anti-coolant sealing and dedicated heavy-duty lubricant as required;custom samples available within 10–15 days.
Precision Manufacturing Process:All raceways and rollers are ultra-fine ground to meet P5/P4/P2 standards with full dimensional inspection;
Fast Global Delivery:Standard in-stock RB items can be dispatched promptly with worldwide multi-channel logistics service.
Authoritative Quality Certification:Products comply with ISO 9001 & GB/T 307.1 standards,and SGS inspection certificates can be provided upon customers' request.
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sales@newbeetrans.com
+8615090185276