H1: low-noise electric motor bearings
Subhead: deep groove ball bearing with ZZ or 2RS, noise ZV2/ZV3/ZV4
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![Electric Motor Bearing 6205-2RS]()
Electric Motor Bearing 6205-2RSBearing Type: Radial ball bearing 6205-2RS 6206-2RS 6206-2RS for electric motorview more
Dimensions (dxDxB): 25*52*15mm (6205)
Material: Chrome steel GCr15, SAE52100, SUJ2... -
![Deep Groove Ball Bearing 6204ZZ]()
Deep Groove Ball Bearing 6204ZZBearing Type: Radial ball bearing 6204-ZZ for electric motorview more
Dimensions (dxDxB): 20*47*12mm (6204)
Material: Chrome steel GCr15, SAE52100, SUJ2
Seals: Metal shield on both side -
![Ball Bearing 6308-2RS]()
Ball Bearing 6308-2RSBearing Type: Ball bearing 6308-2RS for electric motor three-phase motor frame size 90Sview more
Dimensions (dxDxB): 40*90*23mm (6308)
Material: 100% Chrome Steel for higher resistance and... -
![Deep Groove Ball Bearings 6205ZZ]()
Deep Groove Ball Bearings 6205ZZBearing Type: Radial ball bearing 6205-ZZ for electric motorview more
Dimensions (dxDxB): 25*52*15mm (6205)
Material: Chrome steel GCr15, SAE52100, SUJ2
Seals: Metal shield on both side -
![Deep Groove Ball Bearing 6314-2RS]()
Deep Groove Ball Bearing 6314-2RSBearing Type: Radial ball bearing 6314-2RSview more
Dimensions (dxDxB): 70*150*35mm (6314)
Material: 100% Chrome Steel for higher resistance and durability material
Seals: Rubber seals... -
![Electric Motor Bearings 6208-2RS]()
Electric Motor Bearings 6208-2RSBearing Type: Electric motor bearings 6208-2RSview more
Dimensions (dxDxB): 40*80*18mm (6308)
Material: 100% Chrome Steel for higher resistance and durability material
Seals: Rubber... -
![Electric Motor Bearings 6307-2RZP5]()
Electric Motor Bearings 6307-2RZP5Bearing Type: Electric motoer bearings 6307-2RZP5view more
Dimensions (dxDxB): 35*80*21mm (6307)
Material: 100% Chrome Steel for higher resistance and durability material
Seals: Rubber... -
![Deep Groove Ball Bearings 6310C3]()
Deep Groove Ball Bearings 6310C3Bearing Type: Radial ball bearing 6310C3view more
Dimensions (dxDxB): 50*110*27mm (6310)
Material: 100% Chrome Steel for higher resistance and durability material
Cage: Steel -
![Deep Groove Ball Bearing 61902-2RS]()
Deep Groove Ball Bearing 61902-2RSBearing Type: Ball bearing 61902-2RS 6902-2RSview more
Dimensions (dxDxB): 15*28*7mm
Material: Chrome steel GCr15, SAE52100, SUJ2
Seals: Rubber seals on both side -
![Deep Groove Ball Bearings 61904-2Z]()
Deep Groove Ball Bearings 61904-2ZBearing Type: Ball bearing 61904-2Z 6904-ZZview more
Dimensions (dxDxB): 20*37*9mm
Material: Chrome steel GCr15, SAE52100, SUJ2
Seals: Rubber seals on both side -
![Radial Ball Bearing 6007-2RS]()
Radial Ball Bearing 6007-2RSBearing Type: Radial ball bearing 6007-2RSview more
Dimensions (dxDxB): 35*62*14mm (6007)
Material: Chrome steel GCr15, SAE52100, SUJ2
Seals: Rubber seals on both side
Low friction
point contact gives a friction coefficient in the ~0.001–0.0015 range; cooler running, less energy loss.
High speed
up to ~600,000 DmN with proper lubrication; 6200-series can exceed 20,000 RPM grease-lubricated (manufacturer data).
Radial + axial loads, both directions
deep grooves handle combined loads, so one bearing replaces several designs.
Low noise & low vibration
optimized rolling contact; Schaeffler reports internal noise-reduction measures cutting friction by ~35%, extending grease and bearing life.
Long service life
precision-ground GCr15/SAE 52100 steel, advanced seals and lubricants.
Low maintenance
sealed/shielded variants (ZZ, 2RS) are grease-packed and maintenance-free for life.
Easy mounting & interchangeability
standardized ISO/DIN bore/OD/width; drop-in replacement worldwide; special bore/OD on request (SKF).
Best cost-performance
mass production makes premium performance available at commodity prices.
Deep Groove Ball Bearing — Engineering Specifications
① Standards
Boundary dimensions: ISO 15 (ANSI/AFBMA Std. 12.2 inch). Tolerances: ISO 492 / DIN 620-2, classes Normal (P0), P6, P5 standard, P4/P2 on request (≈ ABEC 1/3/5/7/9). Internal clearance: ISO 5753 (C1–C5). Vibration: ISO 15242.
② Reference size 6204 (verified)
d 20 × D 47 × B 14 mm, r_min 1.0 mm; Cr 12.8–14.1 kN, C0r 6.55–6.6 kN (varies by maker); limiting speed: 15,000 rpm grease / 18,000 rpm oil (open), 22,000 rpm oil (shielded ZZ).
③ Materials
Rings/balls: GCr15 / SAE 52100, ≈60–66 HRC; options: 440C stainless, hybrid Si₃N₄ ceramic balls; cages: pressed steel, brass, glass-reinforced polyamide; seals: open / ZZ / 2RS (NBR) / 2RZ.
④ Ratings & life
P = X·Fr + Y·Fa (X = 0.56 when Fa/Fr > e); L₁₀ = (Cr/P)³ × 10⁶ revs; static safety s₀ = C0r/P0 (recommend ≥ 1–2); DmN = 0.5(D+d)·n, DGBB up to ≈600,000.
⑤ Clearance (ISO 5753, bore 18–24 mm)
C2 0–10 · CN 5–20 · C3 13–28 · C4 20–36 · C5 28–48 μm. CN standard; C3 for e-motors/interference fits; C4/C5 for heat or heavy fits.
⑥ Operating envelope
≈ −20…+120 °C with standard grease; heat-stabilized rings SN 120 °C / S0 150 °C / S1 200 °C; NBR seals ≈ −40…+100 °C.
Industry Applications
Why each industry picks it — the same four features drive adoption across sectors: high speed & low heat (point contact, μ ~0.001, up to ~600,000 DmN); quiet & smooth (low-vibration design, low-noise grease, P5/P6 precision); maintenance-free & long life (sealed 2RS/ZZ, life-lubricated, GCr15/52100 steel); and versatile drop-in fit (ISO 15/492, radial + axial load both directions).
The eight major application sectors:
Electric motors & generators
AC/DC, servo/stepper, EV traction, e-bike, gensets, fans. The single largest end-use. Typical: 6200/6300, 2RS/ZZ, C3, low-noise grease.
01
Automotive & EV
alternators, starters, water/coolant pumps, cooling fans, A/C & e-compressors, idler pulleys, window/seat/wiper motors, EV traction & e-axle. Typical: 6200/6300, 2RS, temp-rated grease.
02
Household appliances
washers/dryers, refrigerators & compressors, vacuums, blenders, coffee machines, microwaves, room AC. Typical: 6000/6200, 2RS, miniature 608/626.
03
Power tools & garden equipment
drills, grinders, saws, sanders, lawn mowers, trimmers, blowers, chainsaws. Typical: 6200/6300, 2RS; hybrid ceramic for premium high-thrust tools.
04
Industrial machinery & automation
gearboxes, pumps, fans, compressors, conveyors, machine tools, robotics, textile/printing/packaging, food processing. Typical: 6200/6300/6400, open/oil, P5/P6, C3; stainless/food-grade for food lines.
05
Medical, dental & laboratory
dental handpieces, surgical drills, centrifuges, analyzers, MRI auxiliaries, infusion/dialysis pumps, ventilators. Typical: miniature 608/626/688, hybrid Si₃N₄, 440C stainless, P4/P5.
06
Aerospace & defense
actuators, gyroscopes/instruments, APUs, landing-gear accessories, control & guidance, satellite mechanisms. Typical: P4/P2, special alloys/coatings, hybrid ceramic, dry-film lubrication, full traceability.
07
Sports, leisure & office/IT
bicycle hubs/bottom brackets, skateboards, inline skates, fishing reels, gym equipment; printers/copiers, scanners, HDD fans, paper-feed rollers. Typical: 608 (skateboard/bicycle), 626/688, stainless for outdoor, hybrid ceramic for premium cycling.
08
Also widely used in agriculture, construction, energy & renewables (wind auxiliaries, solar trackers, hydro pumps), and rail transit.
Hangzhou Huaxing Kechuang Holding Group Co., Ltd. is one of the leading manufacturers and suppliers of electric motor bearings in China, featured by quality products and good service. Please rest assured to buy bulk durable electric motor bearings from our factory. Welcome to view our website for more information.
6308-LLU, 6314-DDU, electric motor bearings
