Miniature Ball Bearings · Metric Miniature Deep Groove Series

Miniature Deep Groove Ball Bearings

Q: What closure options are available?

Open bearings leave the raceway accessible, ZZ uses metal shields, and 2RS uses rubber seals. Protection and grease retention generally increase from Open to ZZ to 2RS, while closure drag can also increase. Availability and dimensions depend on the selected model; the table publishes Open and ZZ widths where the source provides them.

Q: What precision and clearance options can be supplied?

Precision class and internal clearance are reviewed against the model, speed, noise target, shaft and housing fits, temperature and load. Series-level options are not default specifications for every listed model. Send the required class or the application inputs for confirmation.

Q: Are stainless steel miniature bearings available?

Stainless steel options can be reviewed for applicable models. Material selection should consider corrosion exposure, load, speed, temperature and lubrication rather than treating stainless steel as a direct substitute in every application.

Q: Can I request samples before production?

Yes. Send the model or dimensions together with the application, speed, load, fit and environmental conditions. LUMI can then review the available configuration and define the sample evaluation scope before bulk production.

Q: Can LUMI review my current drawing or bearing sample?

Yes. Submit the drawing, existing model, sample information or measured d × D × B dimensions through the inquiry page. Include the application and observed operating issue when possible. Technical documents and sample arrangements are handled through direct project communication.

This metric miniature deep groove series covers the 1–10 mm bore range listed in the current LUMI selection catalogue.

Search by model or d × D × B to compare model-level dimensions, Cr, C0r and catalogue speed values.

Closure, lubrication, precision and internal clearance must be checked against the actual speed, load, fit, noise and operating environment.

1–10 mm bore rangeOpen / ZZ / 2RS optionsCr, C0r & speed data

Find Your Size Send Your Requirements

Miniature deep groove ball bearings in multiple sizes

Models: 78
Bore range: 1–10 mm
Closures: Open / ZZ / 2RS

Selection table

Find a Bearing by Model or Dimensions

Model-level dimensions and catalogue ratings from the LUMI selection catalogue.

Search model

Bore dOuter DWidth B

78 of 78 models

★ Marked as regular-use in the LUMI catalogue

Model									Request
681	1	3	1	—	96	26	0.7	0.9	Request This Model
691	1	4	1.6	—	141	37	1	1.2	Request This Model
601Xzz	1.5	6	2.5	3	330	99	36	40	Request This Model
★681Xzz	1.5	4	1.2	2	112	33	40	48	Request This Model
691Xzz	1.5	5	2	2.6	169	50	40	48	Request This Model
602ZZ	2	7	2.8	3.5	386	129	30	40	Request This Model
★682ZZ	2	5	1.5	2.3	169	50	23	35	Request This Model
★692ZZ	2	6	2.3	3	330	99	38	45	Request This Model
★MR52ZZ	2	5	2	2.5	169	50	40	50	Request This Model
MR62ZZ	2	6	2.5	2.5	330	99	35	42	Request This Model
MR72ZZ	2	7	2.8	3	386	129	32	40	Request This Model
602xZZ	2.5	8	2.8	4	552	177	20	27	Request This Model
682xZZ	2.5	6	1.8	2.6	209	74	25	32	Request This Model
692xZZ	2.5	7	2.5	3.5	386	129	23	30	Request This Model
MR82x	2.5	8	2.5	—	558	180	20	29	Request This Model
603ZZ	3	9	3	5	571	189	33	42	Request This Model
★623ZZ	3	10	4	4	631	219	41	50	Request This Model
633ZZ	3	13	5	5	1301	488	31	42	Request This Model
★683ZZ	3	7	2	3	311	112	35	42	Request This Model
★693ZZ	3	8	3	4	558	180	40	50	Request This Model
★MR63ZZ	3	6	2	2.5	209	74	32	41	Request This Model
MR83ZZ	3	8	2.5	3	395	141	34	41	Request This Model
MR93ZZ	3	9	2.5	4	571	189	38	48	Request This Model
★604ZZ	4	12	4	4	957	350	35	45	Request This Model
★624ZZ	4	13	5	5	1301	488	34	42	Request This Model
634ZZ	4	16	5	5	1340	523	28	35	Request This Model
★684ZZ	4	9	2.5	4	641	227	40	50	Request This Model
★694ZZ	4	11	4	4	957	350	38	47	Request This Model
★MR74ZZ	4	7	2	2.5	255	108	25	32	Request This Model
★MR84ZZ	4	8	2	3	395	141	28	33	Request This Model
★MR104ZZ	4	10	3	4	711	272	38	47	Request This Model
★605ZZ	5	14	5	5	1329	507	32	41	Request This Model
★625ZZ	5	16	5	5	1729	675	30	40	Request This Model
635ZZ	5	19	6	6	2336	896	28	35	Request This Model
★685ZZ	5	11	3	5	716	282	30	37	Request This Model
★695ZZ	5	13	4	4	1077	432	33	42	Request This Model
★MR85ZZ	5	8	2	2.5	218	90	22	25	Request This Model
★MR95ZZ	5	9	2.5	3	431	169	24	27	Request This Model
★MR105ZZ	5	10	3	4	431	169	32	39	Request This Model
★MR115ZZ	5	11	—	4	716	282	29	35	Request This Model
606ZZ	6	17	6	6	2263	846	31	40	Request This Model
★626ZZ	6	19	6	6	2336	896	30	41	Request This Model
636ZZ	6	22	7	7	3290	1360	29	38	Request This Model
★686ZZ	6	13	3.5	5	1082	442	35	41	Request This Model
★696ZZ	6	15	5	5	1340	523	36	42	Request This Model
★MR106ZZ	6	10	2.5	3	496	218	23	27	Request This Model
★MR126ZZ	6	12	3	4	716	295	25	29	Request This Model
607ZZ	7	19	6	6	2336	896	30	39	Request This Model
627ZZ	7	22	7	7	3290	1360	30	39	Request This Model
★687ZZ	7	14	3.5	5	1173	513	30	39	Request This Model
697ZZ	7	17	5	5	1605	719	28	36	Request This Model
MR117ZZ	7	11	2.5	3	455	202	24	28	Request This Model
MR137ZZ	7	13	3	4	541	276	25	29	Request This Model
★608ZZ	8	22	7	7	3290	1360	30	38	Request This Model
628ZZ	8	24	8	8	3330	1410	28	35	Request This Model
638ZZ	8	28	9	9	4160	1780	25	33	Request This Model
★688ZZ	8	16	4	5	1252	592	32	41	Request This Model
698ZZ	8	19	6	6	2237	917	28	36	Request This Model
★MR128ZZ	8	12	2.5	3.5	543	274	23	27	Request This Model
★MR148ZZ	8	14	3.5	4	817	386	25	29	Request This Model
609ZZ	9	24	7	7	3330	1410	32	38	Request This Model
629ZZ	9	26	8	8	4160	1780	28	34	Request This Model
639ZZ	9	30	10	10	5120	2390	24	30	Request This Model
★679ZZ	9	14	3	4.5	919	468	36	42	Request This Model
★689ZZ	9	17	4	5	1327	668	36	43	Request This Model
699ZZ	9	20	6	6	2467	1081	34	40	Request This Model
★6000ZZ	10	26	8	8	4160	1780	29	34	Request This Model
★6200ZZ	10	30	9	9	5110	2380	25	30	Request This Model
6300ZZ	10	35	11	11	7640	3470	23	27	Request This Model
★6700ZZ	10	15	4	4	855	435	15	17	Request This Model
★6800ZZ	10	19	5	5	1716	840	34	40	Request This Model
6900ZZ	10	22	6	6	2690	1270	30	36	Request This Model
★16100ZZ	10	28	8	8	5110	2380	25	37	Request This Model
62000ZZ	10	26	10	10	4160	1780	27	35	Request This Model
62200ZZ	10	30	14	14	5110	2380	29	36	Request This Model
62300ZZ	10	35	17	17	7640	3470	26	37	Request This Model
62800ZZ	10	19	6	6	1590	750	26	34	Request This Model
63800ZZ	10	19	7	7	1590	750	34	40	Request This Model

Open and ZZ widths are listed separately where applicable. Limiting speeds are catalogue values in ×1000 rpm; suitable application speed depends on the final bearing configuration and operating conditions.

Need a drawing or additional parameter confirmation? Technical files are supplied through direct project communication.

Request Technical Information

Product Overview

Miniature deep groove bearings provide shaft support in limited installation space. The current catalogue covers 1–10 mm bore sizes; the listed dimensions and ratings apply to the individual model rows rather than every miniature bearing configuration.

MR105 open miniature deep groove ball bearing showing balls and cage

Compact metric design

The d × D × B envelope is the first selection constraint for small shafts and housings. Open and ZZ widths are listed separately where the source catalogue provides both values.

Radial and axial load behaviour

Deep groove geometry primarily carries radial load and can accept limited axial load in either direction. Actual capacity depends on the model, fit, speed, lubrication and load condition.

Friction, noise and speed

Catalogue speed values are model-level references. Raceway quality, internal clearance, mounting fit, load and lubricant also influence operating speed, noise and rotational consistency.

Service life factors

Load direction, alignment, contamination, temperature, installation and lubrication affect bearing life. These conditions should be reviewed before a production specification is released.

Bearing Structure

The raceways, balls and cage form the load-carrying assembly. Optional shields or seals retain lubricant and limit contamination; their effect on friction and operating behaviour must be considered separately.

Outer ringThe outer ring fits the housing. Its raceway guides the balls and transfers load between the rolling elements and housing support.
Inner ringThe inner ring fits the shaft. Raceway geometry, surface finish and dimensional consistency influence running accuracy and vibration behaviour.
BallsThe rolling elements transmit load between the rings. Ball quality and matching influence friction, noise and rotational consistency.
CageThe cage maintains ball spacing and guides the rolling elements during rotation.
Shield or sealOptional closures help retain lubricant and reduce contamination ingress. Closure type changes protection, friction and operating behaviour.

Closure Options

Open

No shield or seal over the raceway

The rolling elements remain accessible because no closure covers the raceway. This avoids closure-related contact and can simplify lubricant access.

Suited to cleaner assemblies
Machine enclosure may provide contamination control
Lubrication access remains available

ZZ / Metal Shield

Metal shields on both sides

Metal shields help retain grease and reduce entry of larger particles. Their non-contact or limited-contact arrangement normally adds less closure drag than contact rubber sealing.

Grease retention for enclosed operation
Protection from larger particles
Common option for motors and compact rotating assemblies

2RS / Rubber Seal

Rubber seals on both sides

Rubber sealing provides stronger dust and moisture protection and improves grease retention. Sealing contact can add drag compared with open or shielded options.

Higher contamination protection
Improved grease retention
Selection should account for speed and sealing drag

Configuration	Protection	Grease retention	Relative closure drag	Typical selection priority
Open	Low	Low without surrounding control	Low	Clean assembly and lubricant access
ZZ / Metal Shield	Medium	Medium	Low to medium	Balanced protection and running behaviour
2RS / Rubber Seal	Higher	Higher	Higher	Dust, moisture and lubricant retention

Materials & Configuration

Available options depend on the model and application. Listed series capabilities are not default specifications for every model.

MR105-2RS miniature deep groove ball bearing with rubber seals

MaterialBearing steel · Stainless steel options

ClosureOpen · ZZ metal shields · 2RS rubber seals

PrecisionApplication-specific tolerance class

Internal clearanceApplication-specific clearance

LubricationGrease selection · Oil-lubricated arrangements

Applications

Small Electric Motors

Compact motor assemblies require stable shaft support. Speed, running noise, fit and repeated duty influence the bearing configuration.

Application details

BLDC Motors

Bearing fit, clearance and lubrication affect vibration, rotational stability and running consistency in compact, higher-speed motor layouts.

Application details

FPV / UAV Motors

High rotational speed, low rotating mass and vibration sensitivity make fit, lubrication and running consistency important selection inputs.

Application details

Encoders

Low runout, smooth rotation and dimensional consistency support repeatable feedback and positioning in compact encoder assemblies.

Application details

Compact Gearboxes

Combined loading, alignment, lubrication and limited installation space should be checked for small gearbox shafts and gear stages.

Application details

Home Appliance Motors

Operating duty, noise, temperature and repeat-production consistency often determine closure, clearance and lubricant selection.

Application details

OEM Support

Send the model and operating conditions so the available configuration, sample scope and supply requirements can be reviewed before production.

Useful information to send

Model or d × D × B
Application and operating speed
Load and duty cycle
Noise or vibration target
Temperature and environment
Closure and lubrication preference
Estimated quantity

Send Your Requirements

Bearing configuration

Material, closure, precision and internal clearance can be reviewed against speed, load, noise and installation conditions.

Lubrication

Grease or oil arrangements can be reviewed against speed, noise, temperature, duty and surrounding conditions.

Sample validation

For a new project or supplier replacement, samples can support dimensional, running and application evaluation before bulk production.

OEM supply

Marking, packaging, approved specification control and repeat-order requirements can be reviewed where applicable.

Quality & Inspection

Dimensional inspection against the agreed drawing or sample plan
Noise and vibration screening for the requested evaluation scope
Environmental validation when required by the application

FAQ

How do I select the right miniature bearing size?

Use the shaft diameter for d and the available housing envelope for D and B. The table can then narrow the listed models by those dimensions. Check load, speed, fit, closure, lubrication and operating environment before releasing the final specification.

What closure options are available?

What precision and clearance options can be supplied?

Are stainless steel miniature bearings available?

Can I request samples before production?

Can LUMI review my current drawing or bearing sample?

Need help selecting a miniature bearing?

Send the model or d × D × B dimensions, application, speed, load, noise requirement and expected quantity. Our team can review the available configuration with you.

Send Your Requirements