Flanged Miniature Bearings: F, MF and FR Series Size Chart

Flange OD is not the bearing OD

D is the outside diameter of the outer ring below the flange. The housing bore is machined to D.
Df is the flange outside diameter and Bf is the flange thickness.
A worn or unmarked flanged bearing is often measured across the flange. Ordering by Df instead of D gives the wrong bearing. Measure d, D, B, Df and Bf separately.

How flanged bearing numbers are built

Prefix or mark	Meaning	Example
F	Flanged version of a 60x, 62x, 63x, 68x or 69x miniature bearing	F608 ZZ = 608 ZZ with a flange
MF	Flanged version of a metric thin-section MR bearing	MF105 = MR105 with a flange
FR	Flanged version of an inch R-series bearing	FR4 = R4 with a flange
S…	Stainless steel version of the same size	SF608, SMF105, SFR4
X or /1.5	Bore 0.5 mm above the digit, or a fractional bore	F602X has a 2.5 mm bore
ZZ / 2RS	Metal shields / rubber seals. In miniature sizes the shielded version is often wider than the open one.	See the separate rows in the tables

Flanged bearing size charts

Each row is one size. Open, shielded, sealed and stainless versions that share the size are listed together and link to their model pages. Dimensions are in millimetres and are the same as on each model page.

F series: flanged 60x, 62x, 63x, 68x and 69x

d	D	B	Df	Bf	Models
1	3	1	3.8	0.3	F681 SF681
1	4	1.6	5	0.5	F691 SF691
1.5	4	1.2	5	0.4	F68/1.5 SF681x
1.5	4	2	5	0.6	F68/1.5 ZZ F681x F681XZZ SF681xzz
1.5	5	2	6.5	0.6	F69/1.5 SF691x
1.5	5	2.6	6.5	0.8	F69/1.5 ZZ F691x F691XZZ SF691xzz
1.5	6	2.5	7.5	0.6	F60/1.5 F601x SF601x
1.5	6	3	7.5	0.8	F60/1.5 ZZ F601XZZ SF601xzz
2	5	1.5	6.1	0.5	SF682
2	5	2.3	6.1	0.6	F682 F682 2rs F682 ZZ F682ZZ SF682 2rs SF682zz
2	6	2.3	7.5	0.6	F692 SF692
2	6	3	7.5	0.8	F692 2rs F692 ZZ SF692 2rs SF692zz
2	7	2.8	8.5	0.7	SF602
2	7	3.5	8.5	0.9	F602 F602 2rs F602 ZZ F602ZZ SF602 2rs SF602zz
2.5	6	1.8	7.1	0.5	F682XF SF682x
2.5	6	2.6	7.1	0.8	F682x F682x 2rs F682X ZZ SF682x 2rs SF682xzz
2.5	7	2.5	8.5	0.7	F692XF SF692x
2.5	7	3.5	8.5	0.9	F692x F692x 2rs F692X ZZ SF692x 2rs SF692xzz
2.5	8	2.8	9.5	0.7	F602XF SF602x
2.5	8	4	9.5	0.9	F602x F602x 2rs F602X ZZ SF602x 2rs SF602xzz
3	7	2	8.1	0.5	F683A SF683
3	7	3	8.1	0.8	F683 F683 2rs F683A ZZ F683zz SF683 2rs SF683zz
3	8	3	9.5	0.7	SF693
3	8	4	9.5	0.9	F693 F693 2rs F693 ZZ SF693 2rs SF693zz
3	9	3	10.5	0.7	F603 F603 2rs SF603 SF603 2rs
3	9	5	10.5	1	F603 ZZ SF603zz
3	10	4	11.5	1	F623 F623 2rs F623 ZZ SF623 SF623 2rs SF623zz
3	13	5	15	1	F633 F633 ZZ
4	9	2.5	10.3	0.6	SF684
4	9	4	10.3	1	F684 F684 2rs F684 ZZ SF684 2rs SF684zz
4	11	4	12.5	1	F694 F694 2rs F694 ZZ SF694 SF694 2rs SF694zz
4	12	4	13.5	1	F604 F604 2rs F604 ZZ SF604 SF604 2rs SF604zz
4	13	5	15	1	F624 F624 2rs F624 ZZ SF624 SF624 2rs SF624zz
4	16	5	18	1	F634 F634 2rs F634 ZZ F634zz F634ZZ1 SF634 SF634 2rs SF634zz
5	11	3	12.5	0.8	SF685
5	11	5	12.5	1	F685 F685 2rs F685ZZ SF685 2rs SF685zz
5	13	4	15	1	F695 F695 2rs F695DD F695VV F695ZZ SF695 SF695 2rs SF695zz
5	14	5	16	1	F605 F605 2rs F605DD F605ZZ SF605 SF605 2rs SF605zz
5	16	5	18	1	F625 F625 2rs F625DD F625VV F625ZZ SF625 SF625 2rs SF625zz
5	19	6	22	1.5	F635 F635 2rs F635DD F635VV F635zz F635ZZ1 SF635 SF635 2rs SF635zz
6	13	3.5	15	1	F686A SF686
6	13	5	15	1.1	F686 F686 2rs F686A 2RS F686A 2RZ F686A ZZ F686ADD F686AVV F686zz SF686 2rs SF686zz
6	15	5	17	1.2	F696 F696 2rs F696 2RZ F696 ZZ F696DD F696VV F696zz F696ZZ1 SF696 SF696 2rs SF696zz
6	17	6	19	1.2	F606 F606 2rs F606 2RZ F606 ZZ F606DD F606VV SF606 SF606 2rs SF606zz
6	19	6	22	1.5	F626 F626 2rs F626 2RZ F626 ZZ F626DD F626VV F626zz F626ZZ1 SF626 SF626 2rs SF626zz
6	22	7	25	1.5	F636 F636 2RS F636 2RZ F636 ZZ F636DD F636VV
7	14	3.5	16	1	SF687
7	14	5	16	1.1	F687 F687 2rs F687 2RZ F687 ZZ F687DD F687VV F687ZZ1 SF687 2rs SF687zz
7	17	5	19	1.2	F697 F697 2rs F697 2RZ F697 ZZ F697DD F697VV F697zz F697ZZ1 SF697 SF697 2rs SF697zz
7	19	6	22	1.5	F607 F607 2rs F607 2RZ F607 ZZ F607DD F607VV F607zz F607ZZ1 SF607 SF607 2rs SF607zz
7	22	7	25	1.5	F627 F627 2rs F627 2RZ F627 ZZ F627DD F627VV SF627 SF627 2rs SF627zz
8	16	4	18	1	F688 F688A SF688
8	16	5	18	1.1	F688 2rs F688A 2RS F688A 2RZ F688A ZZ F688ADD F688AVV F688AZZ1 F688zz SF688 2rs SF688zz
8	19	6	22	1.5	F698 F698 2rs F698 2RZ F698 ZZ F698DD F698VV SF698 SF698 2rs SF698zz
8	22	7	25	1.5	F608 F608 2rs F608 2RZ F608 ZZ F608DD F608VV SF608 SF608 2rs SF608zz
9	14	3	15.5	0.8	SF679
9	14	4.5	15.5	0.8	F679 F679 2rs F679zz SF679 2rs SF679zz
9	17	4	19	1	F689 SF689
9	17	5	19	1.1	F689 2rs F689 ZZ F689DD F689VV F689zz F689ZZ1 SF689 2rs SF689zz
9	20	6	23	1.5	F699 F699 2rs F699 2RZ F699 ZZ F699DD F699VV F699zz F699ZZ1 SF699 SF699 2rs SF699zz
9	24	7	27	1.5	F609 F609 2rs F609zz SF609 SF609 2rs SF609zz
10	15	3	16.5	0.8	F6700 ZZ SF6700
10	15	4	16.5	0.8	F6700 F6700ZZ SF6700ZZ
10	19	5	21	1	F6800 F6800 ZZ SF6800 SF6800ZZ
10	19	7	21	1.5	F63800 F63800 ZZ SF63800 SF63800ZZ
10	22	6	25	1.5	F6900 F6900 ZZ SF6900 SF6900ZZ
10	26	8	28	2	F6000 F6000zz
10	30	9	32.25	2.25	F6200 F6200ZZ
12	18	4	19	0.8	F6701 SF6701
12	18	4	19.5	0.8	F6701 ZZ SF6701ZZ
12	21	5	23	1.1	F6801 F6801 ZZ SF6801 SF6801ZZ
12	21	7	23	1.5	F63801 F63801 ZZ SF63801 SF63801ZZ
12	24	6	26	1.5	F6901 SF6901
12	24	6	26.5	1.5	F6901 ZZ SF6901ZZ
12	28	8	30	2	F6001 F6001zz
12	32	10	34.5	2.5	F6201 F6201ZZ
15	21	4	22	0.8	F6702 SF6702
15	21	4	22.5	0.8	F6702 ZZ SF6702ZZ
15	24	5	26	1.1	F6802 F6802 ZZ SF6802 SF6802ZZ
15	24	7	26	1.5	F63802 F63802 ZZ SF63802 SF63802ZZ
15	28	7	30	1.5	F6902 SF6902
15	28	7	30.5	1.5	F6902 ZZ SF6902ZZ
15	35	11	37.75	2.75	F6202 F6202ZZ
17	23	4	24	0.8	F6703 SF6703
17	23	4	24.5	0.8	F6703 ZZ SF6703ZZ
17	26	5	28	1.1	F6803 F6803 ZZ SF6803 SF6803ZZ
17	26	7	28	1.5	F63803 F63803 ZZ SF63803 SF63803ZZ
17	30	7	32	1.5	F6903 SF6903
17	30	7	32.5	1.5	F6903 ZZ SF6903ZZ
17	35	10	37.5	2.5	F6003 F6003zz
17	40	12	43	3	F6203 F6203ZZ
20	27	4	28	0.8	F6704 SF6704
20	27	4	28.5	0.8	F6704 ZZ F6704ZZ
20	32	7	35	1.5	F6804 F6804 ZZ SF6804 SF6804ZZ
20	32	10	35	2	F63804 F63804ZZ SF63804 SF63804ZZ
20	37	9	40	2	F6904 F6904 ZZ SF6904 SF6904ZZ
20	42	12	45	3	F6004 F6004zz
20	47	14	50.5	3.5	F6204 F6204ZZ
25	32	4	34	1	F6705 F6705 ZZ SF6705
25	37	7	40	1.5	F6805 F6805 ZZ SF6805 SF6805ZZ
25	37	10	40	2	F63805 F63805ZZ SF63805 SF63805ZZ
25	42	9	45	2	F6905 F6905 ZZ SF6905 SF6905ZZ
25	47	12	50	3	F6005 F6005zz
25	52	15	55.75	3.75	F6205 F6205ZZ
30	37	4	39	1	F6706 F6706 ZZ SF6706
30	42	7	45	1.5	F6806 F6806 ZZ SF6806 SF6806ZZ
30	42	10	45	2	F63806 F63806ZZ SF63806 SF63806ZZ
30	47	9	50	2	F6906 F6906 ZZ SF6906 SF6906ZZ
30	55	13	58.25	3.25	F6006 F6006zz
35	47	7	50	1.5	F6807 F6807ZZ SF6807 SF6807ZZ
35	55	10	58	2.5	F6907 F6907ZZ SF6907 SF6907ZZ
40	52	7	55	1.5	F6808 F6808ZZ SF6808 SF6808ZZ
40	62	12	65	2.5	F6908 SF6908
40	62	12	64.5	2.5	F6908ZZ SF6908ZZ
45	58	7	61	1.5	F6809 F6809ZZ SF6809 SF6809ZZ
45	68	12	71	2.5	F6909 F6909ZZ SF6909 SF6909ZZ
50	65	7	68	1.5	F6810 F6810ZZ SF6810 SF6810ZZ
50	72	12	75	2.5	F6910 F6910ZZ SF6910 SF6910ZZ

MF and SMF series: flanged MR thin-section

d	D	B	Df	Bf	Models
1.2	4	1.8	4.8	0.4	FMR41X MF41x SMF41x
2	5	2	6.2	0.6	MF52B
2	5	2.5	6.2	0.6	MF52 MF52 2rs MF52B ZZ MF52zz SMF52 SMF52 2rs SMF52zz
2	6	2.5	7.2	0.6	MF62 MF62 2rs MF62zz SMF62 SMF62 2rs SMF62zz
2	7	2.5	8.2	0.6	MF72 SMF72
2	7	3	8.2	0.6	MF72 2rs MF72 ZZ MF72ZZ SMF72 2rs SMF72zz
2.5	8	2.5	9.2	0.6	MF82x MF82x 2rs MF82xzz SMF82x SMF82x 2rs SMF82xzz
3	6	2	7.2	0.6	SMF63
3	6	2.5	7.2	0.6	MF63 MF63 2rs MF63 ZZ SMF63 2rs SMF63zz
3	8	3	9.5	0.7	MF83 MF83 2rs MF83zz SMF83 SMF83 2rs SMF83zz
3	9	2.5	10.2	0.6	MF93 SMF93
3	9	4	10.6	0.8	MF93 2rs MF93 ZZ SMF93 2rs SMF93zz
4	7	2.5	8.2	0.6	MF74 MF74 2rs MF74 ZZ SMF74 SMF74 2rs SMF74zz
4	8	2	9.2	0.6	MF84 SMF84
4	8	3	9.2	0.6	MF84 2rs MF84 ZZ SMF84 2rs SMF84zz
4	10	3	11.2	0.6	MF104 MF104B
4	10	4	11.6	0.8	MF104 2rs MF104B ZZ MF104zz SMF104 SMF104 2rs SMF104zz
5	8	2	9.2	0.6	SMF85
5	8	2.5	9.2	0.6	MF85 MF85 2rs MF85 ZZ SMF85 2rs SMF85zz
5	9	3	10.2	0.6	FMR95 MF95 MF95 2rs MF95 ZZ SMF95 SMF95 2rs SMF95zz
5	10	4	11.6	0.8	MF105 MF105 2rs MF105 ZZ SMF105 SMF105 2rs SMF105zz
5	11	4	12.6	0.8	MF115 MF115 2rs MF115zz SMF115 SMF115 2rs SMF115zz
6	10	2.5	11.2	0.6	MF106
6	10	3	11.2	0.6	FMR106 MF106 2rs MF106 ZZ MF106ZZ1 SMF106 SMF106 2rs SMF106zz
6	12	4	13.6	0.8	FMR126 MF126 MF126 2rs MF126 ZZ SMF126 SMF126 2rs SMF126zz
7	11	3	12.2	0.6	MF117 MF117 2rs MF117 ZZ SMF117 SMF117 2rs SMF117zz
7	13	3	14.2	0.6	MF137 SMF137
7	13	4	14.6	0.8	MF137 2rs MF137 ZZ SMF137 2rs SMF137zz
8	12	2.5	13.2	0.6	SMF128
8	12	3.5	13.6	0.8	FMR128 FMR148 MF128 MF128 2rs MF128 ZZ MF128zz MF128ZZ1 SMF128 2rs SMF128zz
8	14	4	15.6	0.8	MF148 MF148 2rs MF148 2RZ MF148 ZZ SMF148 SMF148 2rs SMF148zz

FR and SFR series: flanged inch sizes

d	D	B	Df	Bf	Models
1.191	3.967	2.38	5.156	0.787	FR0 ZZ
1.191	3.97	1.588	5.156	0.33	FR0 SFR0
1.191	3.97	2.38	5.156	0.787	SFR0zz
1.397	4.762	1.984	5.944	0.584	FR1 SFR1
1.397	4.762	2.779	5.944	0.787	FR1 ZZ SFR1zz
1.984	6.35	2.38	7.518	0.584	FR1-4 SFR1-4
1.984	6.35	3.571	7.518	0.787	FR1-4 2rs
1.984	6.35	3.571	7.518	0.787	FR1-4 ZZ SFR1-4 2rs
2.38	4.762	2.38	5.944	0.787	FR133ZZS
2.38	7.938	3.571	9.119	0.787	FR1-5ZZ
2.383	4.762	1.588	5.944	0.457	FR133 SFR133
2.383	4.762	2.38	5.944	0.787	FR133 2rs FR133zz
2.383	4.762	2.38	5.944	0.787	SFR133 2rs SFR133zz
2.383	7.938	2.779	9.119	0.584	FR1-5 SFR1-5
2.383	7.938	3.571	9.119	0.787	FR1-5 2rs SFR1-5 2rs SFR1-5zz
3.175	6.35	2.38	7.518	0.584	SFR144
3.175	6.35	2.779	7.518	0.787	FR144 FR144ZZ SFR144 2rs SFR144zz
3.175	6.35	2.779	7.518	0.787	FR144 2rs
3.175	7.938	2.779	9.119	0.584	SFR2-5
3.175	7.938	3.571	9.119	0.787	FR2-5 FR2-5 2rs FR2-5ZZ SFR2-5 2rs SFR2-5zz
3.175	9.525	2.779	10.719	0.584	FR2-6 SFR2-6
3.175	9.525	3.571	10.719	0.787	FR2-6 2rs FR2-6zz FR2-6ZZS SFR2-6 2rs SFR2-6zz
3.175	9.525	3.967	11.176	0.762	FR2 FR2 2rs FR2ZZ SFR2 SFR2 2rs SFR2zz
3.967	7.938	3.175	9.119	0.914	FR155ZZS
3.97	7.938	2.779	9.119	0.584	SFR155
3.97	7.938	3.175	9.119	0.914	FR155 SFR155 2rs SFR155zz
3.97	7.938	3.175	9.119	0.914	FR155 2rs FR155zz
4.762	7.938	2.779	9.119	0.584	SFR156
4.762	7.938	3.175	9.119	0.914	FR156 FR156 2rs FR156zz FR156ZZS SFR156 2rs SFR156zz
4.762	9.525	3.175	10.719	0.584	FR166 SFR166
4.762	9.525	3.175	10.719	0.787	FR166 2rs FR166ZZ SFR166 2rs SFR166zz
4.762	12.7	4.978	14.351	1.067	FR3 FR3ZZ SFR3 2rs SFR3zz
4.762	12.7	4.978	14.351	1.067	FR3 2rs
6.35	9.525	3.175	10.719	0.584	FR168 FR168B SFR168
6.35	9.525	3.175	10.719	0.914	FR168 2rs FR168zz
6.35	9.525	3.175	10.719	0.914	FR168BZZ SFR168 2rs SFR168zz
6.35	12.7	3.175	13.894	0.584	SFR188
6.35	12.7	4.762	13.894	1.143	FR188 FR188ZZ SFR188 2rs SFR188zz
6.35	12.7	4.762	13.894	1.143	FR188 2rs
6.35	15.875	4.978	17.526	1.067	FR4 FR4B FR4BZZ SFR4 SFR4 2rs SFR4zz
6.35	15.875	4.978	17.526	1.067	FR4 2rs FR4zz
7.938	12.7	3.967	13.894	0.787	FR1810 FR1810ZZ SFR1810 SFR1810 2rs SFR1810zz
7.938	12.7	3.967	13.894	0.787	FR1810 2rs
9.525	22.225	5.558	24.613	1.57	FR6 SFR6
9.525	22.225	7.142	24.613	1.57	FR6 2rs FR6 ZZ SFR6 2rs SFR6zz

Flange dimensions are catalog reference values. Flange OD and thickness can differ between manufacturers for the same designation. Confirm Df and Bf on the drawing before you machine the housing.

Housing design with a flanged bearing

Machine the housing bore to the bearing outside diameter D with the fit the application needs. The flange face then sets the axial position.
The flange locates the bearing in one direction only. Use a retaining ring, cover or opposing shoulder for the other direction.
The flange is thin. Check any axial load that passes through the flange with the supplier before you finalise the design.
Keep the housing face flat and square to the bore. A tilted flange face tilts the outer ring.

When the size you need is not in the table

Send the drawing or a sample with d, D, B, Df, Bf, seal type and quantity. We check whether a catalog size can be used and, if not, confirm feasibility, tooling and lead time before quoting.

Frequently asked questions

What is the difference between F and MF flanged bearings?

F bearings are flanged versions of the 60x, 62x, 63x, 68x and 69x miniature series. MF bearings are flanged versions of the metric MR thin-section series, which have thinner rings for the same bore.

Is the flange size standardised?

Not fully. Flange OD and thickness come from manufacturer catalogs and can differ for the same designation. Always check Df and Bf.

Do shielded flanged bearings have the same width as open ones?

Often not in miniature sizes. The shielded version is frequently wider, which is why the tables list it in a separate row.

Can I replace a flanged bearing with a plain bearing?

Only if the housing is changed to provide axial location, for example with a shoulder or retaining ring.

Flanged Miniature Bearings: F, MF and FR Series