Rolling mill bearings

Deep Groove Ball Bearing

A deep groove ball bearing is the most common and versatile type of bearing, featuring deep, circular grooves in its inner and outer rings that allow it to handle both radial (sideways) and axial (thrust) loads in both directions, making them ideal for electric motors, appliances, and tools due to their low friction, high speed capability, and robust, simple design. 

Features: Inner Ring & Outer Ring: Integral structure (compact, high rigidity); Ball Arrangement: High-precision steel balls (evenly distributed in deep groove raceways, point contact, guided by cage); 

Accuracy: P0, P6, P5, P4;

Size: : Inner Diameter: 150–1400 mm; Outer Diameter: 190–1700 mm; Width:20–132mm;

Materials: Bearing Rings & Balls: GCr15 high-carbon chromium steel or SUS440C stainless steel; Cages: Brass, reinforced Nylon 66, or stamped steel;

Delivery: Standard models: 3–10 days; Customized models: Please contact the manufacturer. 

Techspecs

Deep Groove Ball Bearing
Part numberBoundary dimensionsBasic load ratingsMassInstallation dlmenslonLimiting speeds
CurrentOriginalmmKNkgmmr/min
dDBminCrCordaminDamaxramaxGreaseOil
NB.618301000830150190201.149.158.51.15156.6183.5130003600
NB.61930M1000930H2102828590.52.59159201228003400
NB.160307000130225241.191.998.53.62156.5218.5126003000
NB.6030130225352.11321254.24161214226003000
NB.6230230270453203199101632572.519002500
NB.633033032065428829522.7166304318002300
NB.618321000832160200201.148.5611.23166.5193.5128003400
NB.61932M1000932H22028287962.71169211226003200
NB.160327000132240251.5991084.21682321.524003000
NB.6032132240382.11451385.15171229224003000
NB.6232M232H29048321521814.51732772.519002400
NB.633233234068431334029176324318002200
NB.618341000834170215221.161.5781.9176.5208.5126003200
NB.61934100093423028288.81002.85179221224003000
NB.160347000134260281.51181305.711782521.522002800
NB.6034134260422.11701706.89181249222002800
NB.623423431052424526015.8186294319002400
NB.633433436072433537836.6286344317002000
NB.618361000836180225221.162.378.51.72186.5218.5124003000
NB.61936M1000936H2503321191334.16189241222002800
NB.61936X37362603421401476.1


21002700
NB.1603670001362803121451577.5189271220002600
NB.6036136280462.11881988.88191269220002600
NB.623623632052426228515.9196304318002200
NB.633633638075435540543.1196364216002000
NB.61838M1000838H190240241.575.193.52.531982321.522002800
NB.61938M1000938H2603321171335.18199251222002800
NB.1603870001382903121491687.78199281220002600
NB.6038138K1290462.11882019.39201279220002600
NB.623823834055428532222.3206324317002000
NB.633833840078535541549.7210380416001900
NB.61840M1000840H200250241.574982.672082421.522002800
NB.61940M1000940H280382.11491687.28211269220002600
NB.16040700014031034216719110209301219002400
NB.6040140310512.120722612211299219002400
NB.624024036058428833226.7216344317002000
NB.634034042080538044555.3220400415001800
NB.61844M1000844H220270241.576.597.82.92282621.519002400
NB.619441000944300382.11521787.88231289219002400
NB.160447000144340372.118021713.1231329218002200
NB.604414434056325226818.62333272.518002200
NB.624424440065435536537.4236384315001800
NB.634434446088541052073.9240440413001600
NB.61848100084824030028283.51084.48249291218002200
NB.61948M1000948H320382.11541908.49251309218002200
NB.160487000148360372.119624313.9251349217002000
NB.604814836056327029219.92533472.517002000
NB.624824844072435846750.5256424313001600
NB.634834850095547062594.4260480411001400
NB.61852M1000852H2603202821011484.84269311217002000
NB.61952M1000952H360462.121026814271349216001900
NB.16052700015240044323731021.12733872.515001800
NB.6052M152H40065429137529.4276384315001800
NB.625225248080540054067280460411001400
NB.63523525401026505710118284516510001300
NB.6185610008562803503321331917.2289341216001900
NB.61956M1000956H380462.120927215.1291369215001800
NB.16056700015642044324333022.72934072.514001700
NB.605615642065430041031.2296404314001700
NB.625625650080540055070.4300480411001400
NB.6356356580108657084014430455659501200
NB.60860X17603003602521051665.05


15001800
NB.618601000860380382.116623310.3311369214001700
NB.61960M1000960H42056326937023.93134072.513001600
NB.16060700016046050428540531.5316447312001500
NB.606016046074435550044.2316447312001500
NB.626026054085546567087.8320520410001300
NB.63603206201097.559388616933258868001000
NB.618641000864320400382.116824410.8331389213001600
NB.61964100096444056327539225.33334272.512001500
NB.16064700016448050429343033.2336464311001400
NB.606416448074439057046.5336464311001400
NB.626426458092553080511134056049501200
NB.618681000868340420382.117526511.5351409212001500
NB.61968100096846056329241826.63534472.511001400
NB.16068700016852057434552045356507310001300
NB.606816852082544066062.3360500410001300
NB.626826862092653082012936459659001100
NB.618721000872360440382.119229011.8371429211001400
NB.61972100097248056328042527.93734672.511001400
NB.16072700017254057435155049376527310001300
NB.607217254082546072065.3380520410001300
NB.61072X387255085546072072.6380530410001300
NB.62722726509565559051453846264750950
NB.618761000876380480462.123837519.5391469210001300
NB.16976700097652044325639030.5


10001300
NB.61976100097652065432551040396504310001300
NB.16076700017656057437762051


9501200
NB.60761765608254557256840465659501200
NB.618801000880400500462.124139020.5411489210001300
NB.6198010009805406543355404241652439501200
NB.608018060090551082588.442058049001100
NB.618841000884420520462.124541021.443150929501200
NB.61984100098456065434057043.643654439001100
NB.608418462090553089592.244060049001100
NB.618881000888440540462.124942522.345152929001100
NB.61988F3100098860074439568060.245658439001100
NB.608818865094655096510646063048501000
NB.61892100089246058056331055034.34735672.59001100
NB.61992100099262074440572062.647660438501000
NB.6092192680100660510801234806604800950
NB.61896100089648060056331557535.44935872.58501000
NB.61996100099665078545081573.55006304800950
NB.6096196700100660510901275006804750900
NB.618/50010008/50050062056332060037.25136072.5800950
NB.619/50010009/500670785460865825206504750900
NB.60/5001/500720100663011701315246965750900
NB.618/53010008/53053065056332562539.85436372.5750900
NB.619/53010009/53071082545587089.85506904750900
NB.60/5301/530780112668013001845547565700850
NB.618/56010008/56056068056333065041.55736672.5700850
NB.619/56010009/56075085552510401055807304670800
NB.618/60010008/60060073060335573550.96137172.5670800
NB.619/60010009/60080090555011601206207804630750
NB.60/6001/600870118679016402366248465600700
NB.618/63010008/63063078069442089071.36467673630750
NB.619/63010009/630850100662513501636548265600700
NB.60/630N11/630K9201287.575016202856628886560670
NB.618/67010008/67067082069443596575.46868073560670
NB.619/67010009/670900103667514601816948765530630
NB.60/6701/6709801367.576517303517029486500600
NB.618/71010008/710710870744480110092.67268543530630
NB.619/71010009/710950106671516402207349265500600
NB.60/7101/71010301407.5102023103867429986480560
NB.618/75010008/75075092078552512601107709004500600
NB.619/75010009/7501000112678518402457749765480560
NB.60/750175010901507.5995236048578210586450530
NB.618/80010008/80080098082553013101328209804450530
NB.619/80010009/80010601156825205027582410365430500
NB.618/850X33707/85085011501101012703860140904109610430500
NB.618/90010008/9009001090855618153216092010704380450
NB.618/100010008/10001000122010066371250245102411965340400
NB.618/106010008/10601060128010067281500260108412565300360
NB.618/112010008/11201120136010667651960315114413365--
NB.618/114010008/11401140138010668582390324


--
NB.618/118010008/11801180142010667922210342120413965260320
NB.618/125010008/12501250150011239272670178127414765

NB.618/132010008/13201320160012269562350500134415765190240
NB.618/140010008/1400140017001327.511202750615143216886190240

Description

Design Principles: Adopt point contact design of deep groove raceways and high-precision steel balls, with optimized raceway curvature to balance load-bearing capacity and friction loss, realizing efficient transmission of radial loads and small bidirectional axial loads; the integral inner/outer ring structure enhances rigidity, reduces cumulative assembly errors, and the cage guides steel balls to move orderly, avoiding friction and collision between steel balls, improving operational smoothness at high speeds. Raceways undergo precision grinding (Ra≤0.02μm) to reduce friction coefficient and operating noise; sealing design can be flexibly selected according to working conditions, adapting to clean, dusty and other environments; universal structure design is compatible with the assembly needs of most equipment without additional adaptation adjustments. Performance Features: Core High-Speed Adaptation: Optimized raceway and cage design, maximum speed up to 6000 rpm with grease lubrication and 8000 rpm with oil lubrication, 20% higher than bearings of the same size, adapting to high-speed operation scenarios. Universal Load Bearing: Can simultaneously bear radial loads and small bidirectional axial loads, no need for additional bearings, adapting to multiple types of load requirements. Compact Structure: Small size and light weight, stronger adaptability under the same installation space, adapting to equipment scenarios with limited space. Long Service Life & Stability: Surface hardening treatment of GCr15 material, precision polishing of steel balls, fatigue life increased by 30% compared with conventional bearings, adapting to long-term continuous operation. Low Friction & Low Noise: Friction coefficient ≤0.0012, operating noise ≤50 dB, adapting to silent scenario requirements. Customization Options: Supports non-standard size (inner diameter/outer diameter/width) customization, corrosion-resistant material (SUS440C) customization, special lubrication solutions for high/low temperature, seal type upgrade (composite seal), and cage material customization (high-speed/silent dedicated).
Deep Groove Ball Bearing

Features

Strong Universal Adaptability

Can bear radial and small bidirectional axial loads without additional bearings, covering more than 90% of general machinery scenario needs.

High Speed & Low Friction

Maximum speed up to 8000 rpm, low friction coefficient, high operating efficiency and low energy consumption.

Convenient Installation & Maintenance

Integral structure + standardized size, no complex assembly process, low maintenance cost and easy replacement

High-performance, cost-effective import substitute

Technical specifications fully match those of imported products, ensuring stable supply and reducing procurement costs by 20%-30%.

Wide Application Adaptability

Compatible with various environments such as clean, high-temperature, and low-noise conditions, supports multi-dimensional customization, covering machinery, automotive, household appliances, electronics and other fields.

Working Principle

Deep Groove Ball Bearing
Working Principle Ball Arrangement and Load Distribution: High-precision steel balls are evenly distributed along deep groove raceways, guided by the cage for orderly movement to avoid frictional interference between steel balls; radial loads are evenly transmitted to the inner and outer rings through point contact between steel balls and raceways, and small bidirectional axial loads are borne through contact between the side of the raceway and steel balls; the point contact design reduces friction loss, improving operating efficiency and smoothness at high speeds. Thermal Management and Sealing: Thermal Management: Precision grinding of raceways and steel balls + low-friction cage design reduce frictional heat generation, effectively controlling operating temperature rise (typical temperature rise ≤8°C); combined with the thermal stability of dedicated grease or circulating oil, it ensures thermal stability under ultra-high speed and long-time operation. Sealing Protection: Contact seals (2RS/ZZ) effectively block dust and liquid intrusion, adapting to complex industrial environments; non-contact seals (Z/RS) reduce high-speed operating resistance, meeting the needs of ultra-high speed precision operation; open design facilitates lubrication supply, adapting to clean heavy-load working conditions. Installation Adaptability: The inner and outer rings adopt standard fits with shafts and housings (shaft h7/housing bore H8), compatible with the assembly tolerance requirements of most industrial equipment; the integral structure supports direct installation without additional positioning components; standardized size design can directly replace similar imported bearings, adapting to the upgrading and transformation of existing equipment; lubrication schemes or seal types can be adjusted to adapt to different working condition requirements.

Application & Case

Applications of Deep Groove Ball Bearings

1. Electric Motors

AC and DC motors

Servo motors

Small and medium-sized motors

Used for smooth, low-noise, high-speed operation.

2. Household Appliances

Washing machines

Refrigerators

Air conditioners

Vacuum cleaners

Provide reliable and quiet performance.

3. Automotive Industry

Alternators

Water pumps

Wheel hubs (light-duty)

Support combined loads with long service life.

4.Industrial Machinery

Pumps

Fans and blowers

Compressors

Operate efficiently at various speeds.

5. Gearboxes & Transmissions

Light to medium-duty gearboxes

Handle radial loads with moderate axial forces.

6. Agricultural Machinery

Seeders

Harvesters

Perform reliably in dusty environments (often sealed types).

7. Construction Equipment

Concrete mixers

Small power tools

Used for robustness and simplicity.

8. Office & Automation Equipment

Printers

Conveyors

Linear motion systems

Provide precise and smooth motion.

9. Medical & Laboratory Equipment

Centrifuges

Diagnostic machines

Require high accuracy and low vibration.

10. Power Tools

Drills

Grinders

Saws

Operate at high speed with minimal friction.

FAQ

Deep groove ball bearings use point contact, featuring high speed, low friction, and strong versatility, capable of bearing small axial loads; deep groove roller bearings use line contact, with stronger radial load-bearing capacity but lower speed and complex structure. The selection depends on load size and speed requirements.
They can only bear small axial loads (≤15% of radial load) and cannot bear large axial loads alone. If large axial loads need to be borne, they should be used in combination with thrust bearings
Usually 4-8 weeks. Specifically, it needs to be determined according to size complexity, structure optimization requirements, material supply and production schedule. Urgent production services for precision equipment or emergency projects are supported.
For high-temperature environments, GCr15 material + high-temperature special grease (adapted to ≤150°C) should be selected, combined with open or non-contact seals; for corrosive environments, SUS440C stainless steel material + corrosion-resistant grease + 2RS contact seals should be selected to ensure service life and stability under working conditions.

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