NMB Bearing Cross Reference Chart

Who is NMB Bearing?

NMB, namely Nippon Miniature Bearing Co., Ltd., was established in Japan in 1951. It is a specialized manufacturer of miniature precision ball bearings and small sized ball bearings with an outer diameter of or less than 30 mm. Nippon Miniature Bearing Co., Ltd changed its name into Minebea Co., Ltd in October 1981. And in 2017, Minebea Co., Ltd merged with Mitsumi Electric Co., Ltd, and changed its name to Minebea Mitsumi Co., Ltd.

Now, NMB is the world’s largest manufacturer of miniature precision ball bearings. It is also leading manufacturer of precision electro-mechanical components, including cooling fans and blowers, precision small motors, etc. Its high-precision miniature ball bearings are widely used in video recorders, air conditioners, vacuum cleaners, and automotive motors. transmission and other fields of medical equipment, and computer peripheral hardware, especially in high-speed and high-precision products.

Who is Fitrun Bearing?

Fitrun Bearing was founded in 2003 who is engaged in manufacturing miniature ball bearings with bore diameter of or less than 10 mm. With over 20 years development, it expands the product range and also manufactures ball bearings with bore diameter larger than 10 mm now.

It has 2 ISO9001:2015 certified ball bearing factories with a production capability over 35 million sets of miniature bearings annually, and the bearings are exported to more than 30 countries worldwide.

NMB Bearing Cross Reference Size Chart

Fitrun’s many models of miniature ball bearings have a potential interchange with NMB bearings. You will find the interchange information in the following NMB Bearing Cross Reference Charts for some of the models.

All the models listed in the charts are stainless steel ball bearings, they are also available in chrome steel which is relatively cost effective for lower requirement applications. If you could not find what you are looking for, please contact with us and we will find it for you. We provide free samples to you to test the compatibility before volume.

Metric Standard, Open Type

FitrunNMBBore DiaOuter Dia
S681DDL-3101 mm3 mm
S681XDDL-4151.5 mm4 mm
S691XDDR-5151.5 mm5 mm
S682DDL-5202 mm5 mm
SMR52DDL-520W022 mm5 mm
S692DDR-6202 mm6 mm
SMR62DDR-620W522 mm6 mm
SMR72DDR-720Y522 mm7 mm
S602DDR-7202 mm7 mm
S682XDDL-6252.5 mm6 mm
S692XDDR-7252.5 mm7 mm
S602XDDR-8252.5 mm8 mm
SMR63DDL-6303 mm6 mm
S683DDL-7303 mm7 mm
S693DDR-8303 mm8 mm
SMR93DDR-930Y523 mm9 mm
S603DDR-9303 mm9 mm
S623DDR-10303 mm10 mm
SMR74DDL-7404 mm7 mm
SMR84DDL-8404 mm8 mm
S684DDL-9404 mm9 mm
SMR104DDL-10404 mm10 mm
S694DDR-11404 mm11 mm
S604DDR-12404 mm12 mm
S624DDR-13404 mm13 mm
SMR85DDL-8505 mm8 mm
SMR95DDL-9505 mm9 mm
SMR105DDL-10505 mm10 mm
S685DDL-11505 mm11 mm
S695DDR-13505 mm13 mm
S605DDR-14505 mm14 mm
SMR106DDL-10606 mm10 mm
SMR126DDL-12606 mm12 mm
S686DDL-13606 mm13 mm
S696DDR-15606 mm15 mm
SMR117DDL-11707 mm11 mm
SMR137DDL-13707 mm13 mm
S687DDL-14707 mm14 mm
SMR128DDL-12808 mm12 mm
SMR148DDL-14808 mm14 mm
S688DDL-16808 mm16 mm
S689DDL-17909 mm17 mm
Size Chart of Potential Interchange Between Fitrun Bearing and NMB Bearing for Metric Standard Open Type Miniature Ball Bearings

Metric Standard, Double Shielded

FitrunNMBBore DiaOuter Dia
S681XZZDDL-415ZZ1.5 mm4 mm
S691XZZDDR-515ZZ1.5 mm5 mm
S682ZZDDL-520ZZ2 mm5 mm
SMR52ZZDDL-520W02ZZ2 mm5 mm
S692ZZDDR-620ZZ2 mm6 mm
SMR62ZZDDR-620W52ZZ2 mm6 mm
SMR72ZZDDR-720Y52ZZ2 mm7 mm
S602ZZDDR-720ZZ2 mm7 mm
S682XZZDDL-625ZZ2.5 mm6 mm
S692XZZDDR-725ZZ2.5 mm7 mm
SMR63ZZDDL-630ZZ3 mm6 mm
S683ZZDDL-730ZZ3 mm7 mm
S693ZZDDR-830ZZ3 mm8 mm
SMR93ZZDDR-930Y52ZZ3 mm9 mm
S623ZZDDR-1030ZZ3 mm10 mm
SMR74ZZDDL-740ZZ4 mm7 mm
SMR84ZZDDL-840ZZ4 mm8 mm
S684ZZDDL-940ZZ4 mm9 mm
SMR104ZZDDL-1040ZZ4 mm10 mm
S694ZZDDR-1140ZZ4 mm11 mm
S604ZZDDR-1240ZZ4 mm12 mm
S624ZZDDR-1340ZZ4 mm13 mm
SMR85ZZDDL-850ZZ5 mm8 mm
SMR95ZZDDL-950ZZ5 mm9 mm
SMR105ZZDDL-1050ZZ5 mm10 mm
SMR115ZZDDL-1150Y04ZZ5 mm11 mm
S685ZZDDL-1150ZZ5 mm11 mm
S695ZZDDR-1350ZZ5 mm13 mm
S605ZZDDR-1450ZZ5 mm14 mm
SMR106ZZDDL-1060ZZ6 mm10 mm
SMR126ZZDDL-1260ZZ6 mm12 mm
S686ZZDDL-1360ZZ6 mm13 mm
S696ZZDDR-1560ZZ6 mm15 mm
SMR117ZZDDL-1170ZZ7 mm11 mm
SMR137ZZDDL-1370ZZ7 mm13 mm
S687ZZDDL-1470ZZ7 mm14 mm
SMR128ZZDDL-1280ZZ8 mm12 mm
SMR148ZZDDL-1480ZZ8 mm14 mm
S688ZZDDL-1680ZZ8 mm16 mm
S689ZZDDL-1790ZZ9 mm17 mm
Size Chart of Potential Interchange Between Fitrun Bearing and NMB Bearing for Metric Standard Double Shielded Miniature Ball Bearings

Metric Flanged, Open Type

FitrunNMBBore DiaOuter Dia
SF681XDDLF-4151.5 mm4 mm
SF691XDDRF-5151.5 mm5 mm
SF682DDLF-5202 mm5 mm
SMF52DDLF-520WO22 mm5 mm
SF692DDRF-6202 mm6 mm
SMF72DDRF-720Y522 mm7 mm
SF682XDDLF-6252.5 mm6 mm
SF692XDDRF-7252.5 mm7 mm
SF602XDDRF-8252.5 mm8 mm
SMF63DDLF-6303 mm6 mm
SF683DDLF-7303 mm7 mm
SF693DDRF-8303 mm8 mm
SMF93DDRF-930Y523 mm9 mm
SF623DDRF-10303 mm10 mm
SMF74DDLF-7404 mm7 mm
SMF84DDLF-8404 mm8 mm
SF684DDLF-9404 mm9 mm
SMF104DDLF-10404 mm10 mm
SF694DDRF-11404 mm11 mm
SF604DDRF-12404 mm12 mm
SF624DDRF-13404 mm13 mm
SMF85DDLR8505 mm8 mm
SMF95DDLF-9505 mm9 mm
SMF105DDLF-10505 mm10 mm
SF685DDLF-11505 mm11 mm
SF695DDRF-13505 mm13 mm
SF605DDRF-14505 mm14 mm
SMF106DDLF-10606 mm10 mm
SMF126DDLF-12606 mm12 mm
SF686DDLF-13606 mm13 mm
SF696DDRF-15606 mm15 mm
SMF117DDLF-11707 mm11 mm
SMF137DDLF-13707 mm13 mm
SF687DDLF-14707 mm14 mm
SMF128DDLF-12808 mm12 mm
SMF148DDLF-14808 mm14 mm
SF688DDLF-16808 mm16 mm
SF689DDLF-17909 mm17 mm
Size Chart of Potential Interchange Between Fitrun Bearing and NMB Bearing for Metric Flanged Open Type Miniature Ball Bearings

Metric Flanged, Double Shielded

FitrunNMBBore DiaOuter Dia
SF681XZZDDLF-415ZZ1.5 mm4 mm
SF691XZZDDRF-515ZZ1.5 mm5 mm
SF682ZZDDLF-520ZZ2 mm5 mm
SMF52ZZDDLF-520WO2ZZ2 mm5 mm
SF692ZZDDRF-620ZZ2 mm6 mm
SMF72ZZDDRF-720Y52ZZ2 mm7 mm
SF602ZZDDRF-720ZZ2 mm7 mm
SF682XZZDDLF-625ZZ2.5 mm6 mm
SF692XZZDDRF-725ZZ2.5 mm7 mm
SF602XZZDDRF-825ZZ2.5 mm8 mm
SMF63ZZDDLF-630ZZ3 mm6 mm
SF683ZZDDLF-730ZZ3 mm7 mm
SF693ZZDDRF-830ZZ3 mm8 mm
SMF93ZZDDRF-930Y52ZZ3 mm9 mm
SF623ZZDDRF-1030ZZ3 mm10 mm
SMF74ZZDDLF-740ZZ4 mm7 mm
SMF84ZZDDLF-840ZZ4 mm8 mm
SF684ZZDDLF-940ZZ4 mm9 mm
SMF104ZZDDLF-1040ZZ4 mm10 mm
SF694ZZDDRF-1140ZZ4 mm11 mm
SF604ZZDDRF-1240ZZ4 mm12 mm
SF624ZZDDRF-1340ZZ4 mm13 mm
SMF85ZZDDLR850ZZ5 mm8 mm
SMF95ZZDDLF-950ZZ5 mm9 mm
SMF105ZZDDLF-1050ZZ5 mm10 mm
SF685ZZDDLF-1150ZZ5 mm11 mm
SF695ZZDDRF-1350ZZ5 mm13 mm
SF605ZZDDRF-1450ZZ5 mm14 mm
SMF106ZZDDLF-1060ZZ6 mm10 mm
SMF126ZZDDLF-1260ZZ6 mm12 mm
SF686ZZDDLF-1360ZZ6 mm13 mm
SF696ZZDDRF-1560ZZ6 mm15 mm
SMF117ZZDDLF-1170ZZ7 mm11 mm
SMF137ZZDDLF-1370ZZ7 mm13 mm
SF687ZZDDLF-1470ZZ7 mm14 mm
SMF128ZZDDLF-1280ZZ8 mm12 mm
SMF148ZZDDLF-1480ZZ8 mm14 mm
SF688ZZDDLF-1680ZZ8 mm16 mm
SF689ZZDDLF-1790ZZ9 mm17 mm
Size Chart of Potential Interchange Between Fitrun Bearing and NMB Bearing for Metric Flanged Double Shielded Miniature Ball Bearings

Inch Standard, Open Type

FitrunNMBBore DiaOuter Dia
SR09DDRI-20.04″0.125″
SR0DDRI-21/20.04688″0.15625″
SR1DDRI-30.05556″0.1875″
SR1-4DDRI-40.07813″0.25″
SR1-5DDRI-50.09375″0.3125″
SR133DDRI-33320.09375″0.1875″
SR144DDRI-4180.125″0.25″
SR2DDR-20.125″0.375″
SR2-5DDRI-5180.125″0.3125″
SR2-6DDRI-6180.125″0.375″
SR2ADDR-2A0.125″0.5″
SR155DDRI-55320.15625″0.3125″
SR156DDRI-56320.1875″0.3125″
SR166DDRI-66320.1875″0.375″
SR3DDR-30.1875″0.5″
SR168DDRI-6140.25″0.375″
SR188DDRI-8140.25″0.5″
SR4DDR-40.25″0.625″
Size Chart of Potential Interchange Between Fitrun Bearing and NMB Bearing for Inch Standard Open Type Miniature Ball Bearings

Inch Standard, Double Shielded

FitrunNMBBore DiaOuter Dia
SR0ZZDDRI-21/2ZZ0.04688″0.15625″
SR1ZZDDRI-3ZZ0.05556″0.1875″
SR1-4ZZDDRI-4ZZ0.07813″0.25″
SR133ZZDDRI-3332ZZ0.09375″0.1875″
SR1-5ZZDDRI-5ZZ0.09375″0.3125″
SR2ZZDDR-2ZZ0.125″0.375″
SR2-6ZZDDRI-618ZZ0.125″0.375″
SR2AZZSR2ACHH0.125″0.5″
SR155ZZDDRI-5532ZZ0.15625″0.3125″
SR156ZZDDRI-5632ZZ0.1875″0.3125″
SR166ZZDDRI-6632ZZ0.1875″0.375″
SR3ZZDDR-3ZZ0.1875″0.5″
SR168ZZDDRI-614ZZ0.25″0.375″
SR188ZZDDRI-814ZZ0.25″0.5″
SR4ZZDDR-4ZZ0.25″0.625″
Size Chart of Potential Interchange Between Fitrun Bearing and NMB Bearing for Inch Standard Double Shielded Miniature Ball Bearings

Inch Flanged, Open Type

FitrunNMBBore DiaOuter Dia
SFR0DDRIF-21/20.04688″0.15625″
SFR1DDRIF-30.05556″0.1875″
SFR1-4DDRIF-40.07813″0.25″
SFR1-5DDRIF-50.09375″0.3125″
SFR133DDRIF-33320.09375″0.1875″
SFR144DDRIF-4180.125″0.25″
SFR2DDRF-20.125″0.375″
SFR2-5DDRIF-5180.125″0.3125″
SFR2-6DDRIF-6180.125″0.375″
SFR155DDRIF-55320.15625″0.3125″
SFR156DDRIF-56320.1875″0.3125″
SFR166DDRIF-66320.1875″0.375″
SFR3DDRF-30.1875″0.5″
SFR168DDRIF-6140.25″0.375″
SFR188DDRIF-8140.25″0.5″
SFR4DDRF-40.25″0.625″
Size Chart of Potential Interchange Between Fitrun Bearing and NMB Bearing for Inch Flanged Open Type Miniature Ball Bearings

Inch Flanged, Double Shielded

FitrunNMBBore DiaOuter Dia
SFR0ZZDDRIF-21/2ZZ0.04688″0.15625″
SFR1ZZDDRIF-3ZZ0.05556″0.1875″
SFR1-4ZZDDRIF-4ZZ0.07813″0.25″
SFR133ZZDDRIF-3332ZZ0.09375″0.1875″
SFR1-5ZZDDRIF-5ZZ0.09375″0.3125″
SFR2ZZDDRF-2ZZ0.125″0.375″
SFR2-6ZZDDRIF-618SS0.125″0.375″
SFR155ZZDDRIF-5532ZZ0.15625″0.3125″
SFR156ZZDDRIF-5632ZZ0.1875″0.3125″
SFR166ZZDDRIF-6632ZZ0.1875″0.375″
SFR3ZZDDRF-3ZZ0.1875″0.5″
SFR168ZZDDRIF-614ZZ0.25″0.375″
SFR188ZZDDRIF-814ZZ0.25″0.5″
SFR4ZZDDRF-4ZZ0.25″0.625″
Size Chart of Potential Interchange Between Fitrun Bearing and NMB Bearing for Inch Flanged Double Shielded Miniature Ball Bearings