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.
CRBH Cross Roller Bearings are ultra-precision,high-rigidity bearings featuring cylindrical rollers arranged at right angles between the inner and outer rings.This single-unit design allows them to simultaneously handle complex loads in all directions-radial,axial,and moment.Core Basic Specifications Accuracy grades:P5,P4,P2 ultra-precision levels for micron-level positioning Metric size range:Inner diameter 20-1250 mm,outer diameter 36-1500 mm,cross-section height 8-110 mm;miniature models like CRBH208A with only 8mm cross-section fit compact pan and tilt rotary shafts inside PTU equipment Material options:Bearing rings and rollers adopt GCr15 high-carbon chromium steel (surface hardness HRC 60-62) for standard industrial use;SUS440C stainless steel for corrosion-resistant,outdoor,moist and dust-prone working conditions.Cage materials include lightweight Nylon 66,high-strength brass,and customized composite materials Sealing forms:Open type CRBH-A for indoor clean optical PTU cabins;double-side contact rubber sealed CRBH-AUU for outdoor rainproof,dustproof surveillance and monitoring PTUs Lubrication modes:Long-term wide-temperature grease lubrication for outdoor all-weather PTU operation (-40℃~120℃);circulating oil lubrication for ultra-high speed ≤3000 rpm high-frequency scanning PTUs Delivery cycle:Standard stock models 7-15 days;customized PTU dedicated non-standard specifications require separate negotiation on production lead time
Pan-Tilt Units,abbreviated as PTU,are two-axis rotary positioning platforms that realize horizontal pan (azimuth rotation) and vertical tilt (elevation rotation) through servo or stepper drive systems.They are widely equipped with industrial cameras,laser rangefinders,infrared thermal imagers,radar sensors and optical detection lenses,serving core motion execution components in multiple fields.Typical application scenarios include outdoor security monitoring,aerial survey optical tracking,astronomical observation equipment,intelligent traffic detection,fire early warning monitoring,and military optoelectronic stabilization systems.During long-duration continuous rotation,the pan and tilt rotary shafts bear the eccentric self-weight of lenses,sensors and camera housings,as well as alternating overturning moment generated by rapid angle switching.PTUs have stringent mechanical performance demands:ultra-low rotation jitter to avoid image shaking during long-distance shooting,zero backlash to ensure target locking accuracy,dust/water/corrosion resistance for outdoor all-day operation,and long-term stable precision without frequent calibration.Any bearing clearance,micro-vibration or rust will cause target tracking deviation,blurred surveillance images and failure of optical detection tasks.
Multi-Directional Load Capacity:Cylindrical rollers are arranged crosswise at 90° angles in a V-groove,allowing a single bearing to handle loads from all directions simultaneously.
Integrated,Non-Separable Rings:Because the inner and outer rings are solid and do not separate,the bearing's performance is unaffected by the surrounding mounting structure.
Smooth Rotation:They utilize separators between the rollers to prevent friction and ensure smooth,stable rotation,even at medium-to-high speeds.
High Precision & Rigidity:The line-contact design between rollers and raceways keeps elastic deformation incredibly small,resulting in superior stiffness and minimal backlash.
Industrial Robotics & Automation:They are the premier choice for articulating robot joints (bases,waists,and wrists) and speed reducers,where they provide the precise motion control and rigidity necessary for heavy or delicate tasks.
Machine Tools:Employed extensively in CNC rotary tables,grinding machines,and turning centers,where heavy spinning components meet high resistance,they minimize mounting errors and offer high rigidity during operations.
Medical & Imaging Equipment:Their smooth,vibration-free rotation and compact size make them ideal for positioning articulating arms in labs and ensuring the precise rotation of camera or imaging components in CT scanners and MRI machines.
Semiconductor Manufacturing:They deliver the micron-scale precision and repeatability required for pick-and-place systems and wafer handling equipment.
Pan-Tilt Units (PTU):Sealed or stainless customized CRBH cross roller bearings serve the core pan and tilt rotary supports of optical tracking PTUs,outdoor surveillance PTUs,astronomical observation positioning platforms and laser scanning two-axis turrets,realizing backlash-free,low-vibration two-axis angle adjustment for optical sensing equipment.
Zero-backlash stable rotation ensures accurate target tracking:CRBH factory preload eliminates internal bearing clearance completely.When PTU executes fast pan/tilt switching and long-time fixed-point locking,there is no play or micro-shake at the rotation axis.It effectively prevents picture jitter of long-distance surveillance cameras and tracking offset of laser/infrared sensors,greatly improving target capture and positioning precision of optoelectronic PTU systems.
Single bearing bears eccentric sensor composite loads:Camera,thermal imager and radar modules installed on PTU tilt arms generate obvious eccentric weight and alternating overturning moment during vertical pitching movement.A single CRBH bearing can simultaneously bear radial,axial and moment loads without stacking multiple bearing sets,avoiding turret deformation and angle drift under long-hour cyclic rotation.
Compact thin-wall structure miniaturizes PTU overall volume:CRBH ultra-thin integrated cross-section cancels extra fixing flanges and multi-bearing stacked structures,effectively reducing the thickness and overall weight of PTU pan & tilt rotary modules.Smaller,lighter PTU units are easier to install on poles,vehicles,vessels and airborne equipment,optimizing space layout of mobile monitoring systems.
Sealed & stainless versions adapt harsh outdoor environments:CRBH-AUU double rubber sealed bearings block rainwater,sand and dust invasion; SUS440 stainless customized models resist salt fog,acid rain and atmospheric corrosion for coastal,mining and outdoor roadside PTUs.Low-outgassing wide-temperature special grease maintains stable rotation performance under extreme low and high temperature environments without precision attenuation.
Low friction smooth rotation reduces PTU power consumption:Precision polished roller end faces cut rotation friction torque significantly.PTU driven by small servo/stepper motors can realize fast,agile angle adjustment with lower power output,extending the service life of drive motors and reducing power consumption of battery-powered mobile PTU devices.
Long service life lowers field maintenance work:GCr15 or stainless bearing rings with surface hardening treatment lift anti-fatigue performance by 30%,adapting millions of pan-tilt reciprocating rotation cycles.Sealing structure avoids internal raceway abrasion caused by external pollutants,reducing on-site disassembly,cleaning and calibration frequency of outdoor PTU equipment,cutting after-sales maintenance costs for monitoring system manufacturers.
Simplify PTU mechanical design and assembly process:Different from RB split outer ring bearings requiring secondary preload adjustment during assembly,CRBH integrated inner and outer rings finish fixed preload at the factory.PTU structural designers do not need to design complex clearance adjustment mechanisms for rotary shafts,shortening product development,assembly and precision debugging cycles of two-axis positioning turrets.
Newbeetrans is a professional precision cross roller bearings manufacturer focusing on CRBH series bearings customized for all types of pan-tilt units (PTU) including surveillance tracking,astronomical and laser scanning two-axis turrets.We provide full-size standard CRBH stock and targeted customized bearing solutions for optoelectronic monitoring equipment manufacturers.
Full precision control:All raceways and cylindrical rollers undergo ultra-precision grinding to reach P5,P4 and P2 ultra-high precision standards.Every PTU special CRBH bearing passes strict low-jitter,zero-backlash and sealing performance inspection before delivery.
Diverse PTU customization capacity:Support SUS440 stainless anti-corrosion salt-fog versions,wide-temperature low-friction special grease,double-side sealed UU dustproof & waterproof structures and miniature thin-section non-standard sizes for small lightweight PTU turrets.
Stable fast delivery:Standard CRBH series in stock for 7-15 days;customized PTU dedicated bearings can complete sample delivery within 10-15 days according to drawing and sealing process complexity.
Authoritative quality certification:All CRBH bearings comply with ISO 9001 and GB/T 307.1 precision bearing standards,and SGS salt-fog and low-temperature test reports for outdoor PTU application can be provided upon client request.
Global one-stop service:Complete multi-channel global logistics support to deliver CRBH bearings to optoelectronic PTU manufacturers worldwide,with professional technical engineers providing bearing model,material and sealing selection guidance for two-axis pan-tilt rotary mechanisms.
For technical specifications,pricing,or custom bearing solutions:
Email:paul@newbeetrans.com
Website:www.newbeetrans.com
WhatsApp
sales@newbeetrans.com
+8615090185276