Miniature Bearings

601 to 609 series are high-precision miniature deep groove ball bearings, designed for low noise, high speed and smooth operation. They are ideal for a wide range of applications including small electric motors, fans, power tools, toys, home appliances, office equipment, 3D printers, hair dryers, pumps, medical devices and precision instruments. These small ball bearings are also perfect for DIY projects and as replacement miniature bearings in various equipment.

Classification :

Deep Groove Ball Bearings

Keywords :

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Miniature Deep Groove Ball Bearings Wholesale | Metric Micro Mini Bearings Factory CAT Catalog, Full Dimensions Chart

Category Overview

Miniature deep groove ball bearings, also known as micro ball bearings, tiny miniature bearings, small metric ball bearings, ultra small ball bearings, are high-precision single-row ball bearings with inner diameter below 10mm and outer diameter under 26mm. These miniature bearings support radial loads and moderate axial loads, fit high-speed, compact installation scenarios. Widely supplied in bulk for global distributors, machinery manufacturers, RC drone factories and medical device brands.
Spanish market keyword: rodamientos miniatura métricos, rodamientos micro para impresoras 3D y drones FPV.

Hot Series & Dimensions (Metric Standard Mini Bearings, Full Suffix Options In Stock)

1. Standard Metric Mini Series (68 / 69 / 60 / Mini 62 Series)

Covers full range: 68 Series(681~689), 69 Series(691~699), 60 Series(601~609), 62 Mini Series(623~629). Complete stock of open, ZZ, 2RS, RZ, 2RZ and NR flanged bearing suffixes.

Series Range	Inner d(mm)	Outer D(mm)	Width B(mm)	Available Seal/Suffix Types	Core Features & Alias Names	Main Industrial & Hobby Applications
68 Series (681~689) Extra Thin Mini Bearings	1~9	3~19	1~5	Open, ZZ, 2RS, 2RZ, NR, LF Flanged	Ultra thin cross section, space-saving micro ball bearing, slim miniature bearing, low weight for narrow installation space, high speed low noise	Hard disk drive HDD, mechanical watches, small precision gears, dental handpieces, tiny medical sensors, miniature camera modules
69 Series (691~699) Slim Micro Ball Bearings	1~9	4~20	1.6~6	Open, ZZ, 2RS, RZ, LF flanged, C3 clearance	Slim medium load miniature bearing, balance compact size & load capacity, high rotation stability, micro motor dedicated bearing	Mini DC motors, office printers, small industrial robotics, mini cooling fans, beauty salon small equipment, handheld measuring tools
60 Series (601~609) Standard Width Miniature Bearings	1~9	4~24	2~7	Open, Z, ZZ, RS, 2RS, RZ, 2RZ, C2/C3 clearance, LF flange	Standard width tiny ball bearing, higher radial load capacity, universal miniature metric bearing, interchangeable NSK SKF micro bearing	Cordless power tools, small water pumps, RC hobby car models, miniature textile machinery, smart wearable electronic equipment
62 Mini Series (623~629) Heavy Duty Mini Bearings	3~9	7~26	2~8	Open, ZZ, 2RS, 2RZ, NR snap ring, LF flange, C3 high temp clearance	Wider heavy load miniature deep groove ball bearing, thick raceway for bigger load, most popular heavy-duty micro bearing for small machinery	Small industrial gear motors, handheld power drills, mini agricultural small machines, 3D printer spindles, drone propeller shafts, skateboard mini wheels

2. MR Special Narrow Miniature Series (Japanese Standard Micro Bearings)

Also called R series mini bearings, JIS standard non-ISO narrow cross-section bearings, full range MR63~MR148 for RC hobby and precision electronics.

Series Range	Inner d(mm)	Outer D(mm)	Width B(mm)	Suffix & Seal Options	Alias & Key Features	Typical Usage Scenarios
MR Series (MR63 ~ MR148) R Series Mini Bearings	2~8	6~14	2.5~4	Open, ZZ metal shield, FR flanged outer ring	JIS standard tiny micro bearing, ultra narrow cross-section, light weight low friction, compact hobby bearing, small RC bearing	Precision optical instruments, RC drone & car hobby models, miniature toy gearboxes, portable electronic sensors, small camera gimbal shafts

3. Flanged Miniature Bearing Series (LF / FR Flange Type)

Integrated outer flange anti-rotation positioning, one-step press-fit mounting without extra retaining ring, also named lip flange micro bearing.

Flange Series Code	Base Bearing Series	Complete Model Examples	Core Flange Advantages	Market Alias Names	Mounting Application Scenarios
LF Series	68 / 69 / 60 / Mini 62	LF-683ZZ, LF606-2RS, LF628ZZ	Integrated single outer flange, anti-slip anti-rotation, quick press-fit installation, save bearing seat space	Flanged miniature ball bearing, lip flange micro bearing, single flange tiny bearing	Mini gearbox fixed shafts, small pump rotor positioning, 3D printer linear slide blocks, medical handheld device spindles
FR Series	MR / R Narrow Mini Series	FR-133, FR126ZZ	Small thin flange matched MR narrow micro bearing, ultra compact fixed structure for tiny equipment	FR flange R miniature bearing, narrow flanged micro ball bearing	RC drone motor shafts, miniature camera stabilizers, small beauty massage equipment, portable testing sensors

Full Single Model Dimension Tables (d/D/B mm) – Standard Double Column Size Chart Format

68 Series Full Dimension Table (681~689)

Model	d Inner	D Outer	B Width	Model	d Inner	D Outer	B Width
681	1	3	1	686	6	13	3.5
682	2	5	1.5	687	7	14	3.5
683	3	7	2	688	8	16	4
684	4	9	2.5	689	9	19	5
685	5	11	3

69 Series Full Dimension Table (691~699)

Model	d Inner	D Outer	B Width	Model	d Inner	D Outer	B Width
691	1	4	1.6	696	6	15	5
692	2	6	2.3	697	7	17	5
693	3	8	3	698	8	19	6
694	4	11	4	699	9	20	6
695	5	13	4

60 Series Full Dimension Table (601~609)

Model	d Inner	D Outer	B Width	Model	d Inner	D Outer	B Width
601	1	4	2	606	6	17	6
602	2	6	2.5	607	7	19	6
603	3	8	3	608	8	22	7
604	4	12	4	609	9	24	7
605	5	14	5

62 Mini Series Full Dimension Table (623~629)

Model	d Inner	D Outer	B Width	Model	d Inner	D Outer	B Width
623	3	10	4	627	7	22	7
624	4	13	5	628	8	24	8
625	5	16	5	629	9	26	8
626	6	19	6

MR Series Full Dimension Table (MR63~MR148)

Model	d Inner	D Outer	B Width	Model	d Inner	D Outer	B Width
MR63	2	6	2.5	MR115	5	11	4
MR74	2.5	7	2.5	MR117	7	11	3
MR84	4	8	3	MR126	6	12	4
MR85	5	8	2.5	MR128	8	12	3.5
MR95	5	9	3	MR137	7	13	4
MR104	4	10	4	MR148	8	14	4
MR105	5	10	4
MR106	6	10	3

Standard Seal & Structure Suffix Code Glossary (Mini Bearing CAT Index)

Open: No shield / seal (Example: 684, MR84) | Open type miniature ball bearing for regular lubrication high speed
Z / ZZ / 2Z: Single / Double metal dust shield | ZZ micro bearing dustproof low friction for light dust environment
RS / 2RS: Single / Double rubber contact seal | 2RS miniature bearing waterproof dustproof maintenance free
RZ / 2RZ: Single / Double non-contact rubber seal | Low noise high speed mini bearing for fan & precision motor
-F / LF- / FR-: Integrated flanged outer ring | Flange micro bearing anti rotation positioning installation
C2 / CN / C3: Internal clearance grade, C3 most popular for high temp mini motors
NR: Outer ring snap ring groove with matching circlip, mini bearing with retaining ring

Frequently Asked Questions (Wholesale Buyers & Distributors)

Q1: Are you a factory or trading company? How many years have you produced miniature ball bearings?

A: We are a professional miniature bearing manufacturer with over 10 years of production experience, independent production workshop, complete CNC grinding assembly lines, full stock of 68/69/60/62 mini/MR series micro bearings. All products comply with ISO international standards, direct factory supply without middlemen, competitive wholesale price for global distributors.

Q2: What is your MOQ for miniature deep groove ball bearings? Can I mix different models in one order?

A: Our standard MOQ for regular stock miniature bearings is 100pcs per model, small trial orders are acceptable for new distributors. We fully support mixed batch wholesale, you can combine 68,69,60,mini 62,MR series different sizes and seal types in one shipment to lower your procurement cost and reduce inventory pressure.

Q3: Can your miniature bearings 100% interchange with SKF, NTN, NSK standard micro bearings?

A: Yes. All our mini bearings strictly follow ISO metric and JIS dimensional standards, inner diameter, outer diameter, width, tolerance, inner clearance are fully consistent with mainstream brands SKF/NTN/NSK, 100% interchangeable without modification for replacement projects.

Q4: Can I get free samples for testing? What is the sample and bulk order lead time?

A: We provide free miniature bearing samples for qualified wholesale distributors, buyers only need to bear the express freight. Sample production lead time: 3-5 working days. Mass bulk order lead time: 7-15 days based on order quantity, large stock models can ship within 48 hours after deposit confirmation.

Q5: Do you support OEM & custom service for miniature bearings?

A: We offer full OEM custom solutions: laser custom brand logo on bearing inner/outer ring, customized neutral/color export packaging, special clearance C2/C3 customization, special stainless steel material mini bearings, custom flanged LF/FR bearing size for special equipment.

Global Wide Applications of Miniature Deep Groove Ball Bearings

Precision Medical & Instrument: Dental handpieces, surgical miniature equipment, measuring gauges, optical detection sensors, lab micro testing devices
Español: rodamientos para equipos médicos y instrumentos ópticos de precisión
Consumer Electronics: HDD hard disk drives, notebook cooling fans, inkjet printers, smart watches, camera lens rotating shafts, bluetooth wearable devices
Español: rodamientos para electrónica portátil y relojes inteligentes
Hobby & RC Industry: RC racing cars, FPV drone motors, mini skateboards, 3D printer spindles, model ship/aircraft gearboxes
Español: rodamientos para drones FPV, impresoras 3D y modelos RC
Light Mini Industrial Machinery: Tiny DC gear motors, micro water pumps, small textile looms, handheld cordless power tools, mini conveyor rollers
Español: rodamientos para motores DC pequeños y maquinaria ligera

Category Introduction

Deep Groove Ball Bearings are the most versatile and widely used type of rolling element bearings, suitable for a vast range of general industrial applications. Characterized by their simple construction, high speed capability, and low friction, these bearings are designed to handle radial loads as well as bidirectional axial loads.Our deep groove ball bearing product line covers an extensive size range, from ultra-miniature bearings for electronic components to large-sized bearings for heavy machinery and motors. We offer open, ZZ metal-shielded, and 2RS rubber-sealed versions to ensure optimal performance in both clean and harsh environmental conditions.

Our Series Breakdown

We provide a full spectrum of deep groove ball bearing series to meet every precision and load requirement:

Series	Size Range	Key Features	Typical Applications
6000 Series	Miniature & Small	Ultra-compact, high speed, low noise	Small motors, office equipment, power tools
6200 Series	General Purpose	Excellent all-round performance, high rigidity	Electric motors, fans, pumps, conveyors
6300 Series	Medium Duty	Higher radial load capacity, sturdy structure	Gearboxes, agricultural machinery, industrial drives
6400 Series	Heavy Duty	Extra large cross-section, maximum load	Heavy mining equipment, large crushers, high load motors
6700/6800 Series	Ultra-Thin	Space-saving, thin section design	Precision instruments, medical devices, small electronics
Flange Series	Integrated Mount	Built-in flange for easy axial positioning	Robotics, small mechanisms, precision modules

Core Advantages

High Speed & Smoothness: Optimized raceway design ensures quiet and stable operation at high rotational speeds.
Universal Compatibility: Seamlessly fits into most standard machinery due to interchangeable dimensions.
Cost-Effective Reliability: A cost-efficient solution with long service life and low maintenance costs.
Full Sealing Options: Available with ZZ (Metal Shields) and 2RS (Rubber Seals) for maximum protection against dust and moisture.

PRODUCT TESTING

Bearing Forging

Bearing Annealing

Turning Process

Quenching

Bearing Assembly

Bearing Clearance Testing

Grease injection

Bearing Marking

Deep Groove Ball Bearings

Model	d Inner	D Outer	B Width	Model	d Inner	D Outer	B Width
681	1	3	1	686	6	13	3.5
682	2	5	1.5	687	7	14	3.5
683	3	7	2	688	8	16	4
684	4	9	2.5	689	9	19	5
685	5	11	3

Model	d Inner	D Outer	B Width	Model	d Inner	D Outer	B Width
691	1	4	1.6	696	6	15	5
692	2	6	2.3	697	7	17	5
693	3	8	3	698	8	19	6
694	4	11	4	699	9	20	6
695	5	13	4

Model	d Inner	D Outer	B Width	Model	d Inner	D Outer	B Width
601	1	4	2	606	6	17	6
602	2	6	2.5	607	7	19	6
603	3	8	3	608	8	22	7
604	4	12	4	609	9	24	7
605	5	14	5

Model	d Inner	D Outer	B Width	Model	d Inner	D Outer	B Width
681	1	3	1	686	6	13	3.5
682	2	5	1.5	687	7	14	3.5
683	3	7	2	688	8	16	4
684	4	9	2.5	689	9	19	5
685	5	11	3

Model	d Inner	D Outer	B Width	Model	d Inner	D Outer	B Width
691	1	4	1.6	696	6	15	5
692	2	6	2.3	697	7	17	5
693	3	8	3	698	8	19	6
694	4	11	4	699	9	20	6
695	5	13	4

Model	d Inner	D Outer	B Width	Model	d Inner	D Outer	B Width
601	1	4	2	606	6	17	6
602	2	6	2.5	607	7	19	6
603	3	8	3	608	8	22	7
604	4	12	4	609	9	24	7
605	5	14	5

Model	d Inner	D Outer	B Width	Model	d Inner	D Outer	B Width
681	1	3	1	686	6	13	3.5
682	2	5	1.5	687	7	14	3.5
683	3	7	2	688	8	16	4
684	4	9	2.5	689	9	19	5
685	5	11	3

Model	d Inner	D Outer	B Width	Model	d Inner	D Outer	B Width
691	1	4	1.6	696	6	15	5
692	2	6	2.3	697	7	17	5
693	3	8	3	698	8	19	6
694	4	11	4	699	9	20	6
695	5	13	4

Model	d Inner	D Outer	B Width	Model	d Inner	D Outer	B Width
601	1	4	2	606	6	17	6
602	2	6	2.5	607	7	19	6
603	3	8	3	608	8	22	7
604	4	12	4	609	9	24	7
605	5	14	5