Small-Diameter Ball Bearing
Brand :
KMT BEARING
Caution
Product Description
[Features]
Small-diameter ball bearing in witch both inner & outer rings and rolling element bearing are made of steel.
[Applications]
Electric tools, measuring instruments, office machines, etc.
Dimensional Drawing
With flange
Standard table
| Main Dimensions (mm) | Bearing Number | Basic Load Rating | Installation Dimension (mm) Reference Values | Allowable Maximum Speed (min-1) Grease Lubricant rpm | Weight (g) Reference | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| d | D | B | rs (min) | Shields | Cr (N) | Cor (N) | Da (min) | da (max) | R (max) | ZZ | |
| 3 | 6 | 2.5 | 0.10 | MR63ZZ | 208 | 74 | 5.4 | 3.7 | 0.10 | 71000 | 0.27 |
| 8 | 4 | 0.15 | 693ZZ | 560 | 179 | 7.3 | 4.3 | 0.15 | 60000 | 0.83 | |
| 9 | 5 | 0.15 | 603ZZ | 570 | 187 | 7.9 | 4.3 | 0.15 | 56000 | 1.45 | |
| 10 | 4 | 0.15 | 623ZZ | 630 | 218 | 8.0 | 4.3 | 0.15 | 50000 | 1.66 | |
| 4 | 7 | 2.5 | 0.10 | MR74ZZ | 255 | 107 | 6.3 | 4.8 | 0.10 | 60000 | 0.29 |
| 8 | 3 | 0.15 | MR84ZZ | 395 | 139 | 7.4 | 5.0 | 0.10 | 56000 | 0.56 | |
| 9 | 4 | 0.15 | 684ZZ | 640 | 225 | 8.1 | 5.2 | 0.10 | 53000 | 1.01 | |
| 10 | 4 | 0.20 | MR104ZZ | 710 | 270 | 8.8 | 5.9 | 0.20 | 50000 | 1.42 | |
| 11 | 4 | 0.20 | 694ZZ | 960 | 345 | 9.9 | 5.6 | 0.20 | 48000 | 1.75 | |
| 12 | 4 | 0.20 | 604ZZ | 960 | 345 | 9.9 | 5.6 | 0.20 | 48000 | 2.29 | |
| 13 | 5 | 0.20 | 624ZZ | 1300 | 485 | 11.3 | 6.0 | 0.20 | 40000 | 3.04 | |
| 16 | 5 | 0.30 | 634ZZ | 1730 | 670 | 13.8 | 7.5 | 0.30 | 36000 | 5.21 | |
| 5 | 8 | 2.5 | 0.10 | MR85ZZ | 310 | 120 | 7.4 | 5.8 | 0.10 | 53000 | 0.34 |
| 9 | 3 | 0.15 | MR95ZZ | 430 | 168 | 8.2 | 6.0 | 0.15 | 50000 | 0.58 | |
| 10 | 4 | 0.15 | MR105ZZ | 430 | 168 | 8.4 | 6.0 | 0.20 | 50000 | 1.29 | |
| 11 | 4 | 0.15 | MR115ZZ | 715 | 276 | 9.8 | 6.3 | 0.15 | 48000 | 1.49 | |
| 11 | 5 | 0.15 | 685ZZ | 715 | 281 | 9.9 | 6.2 | 0.15 | 45000 | 1.96 | |
| 13 | 4 | 0.20 | 695ZZ | 1080 | 430 | 11.2 | 6.6 | 0.20 | 43000 | 2.50 | |
| 14 | 5 | 0.20 | 605ZZ | 1330 | 505 | 12.2 | 6.9 | 0.20 | 40000 | 3.48 | |
| 16 | 5 | 0.30 | 625ZZ | 1730 | 670 | 13.8 | 7.5 | 0.30 | 36000 | 4.86 | |
| 19 | 6 | 0.30 | 635ZZ | 2340 | 885 | 16.5 | 8.5 | 0.30 | 32000 | 8.34 | |
| Main Dimensions (mm) | Bearing Number | Basic Load Rating | Installation Dimension (mm) Reference Values | Allowable Maximum Speed (min-1) Grease Lubricant rpm | Weight (g) Reference | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| d | D | B | rs (min) | Shields | Cr (N) | Cor (N) | Da (min) | da (max) | R (max) | ZZ | |
| 6 | 10 | 3 | 0.15 | MR106ZZ | 495 | 218 | 9.3 | 7.0 | 0.15 | 45000 | 0.68 |
| 12 | 4 | 0.20 | MR126ZZ | 715 | 292 | 10.9 | 7.2 | 0.20 | 43000 | 1.74 | |
| 13 | 5 | 0.20 | 686ZZ | 1080 | 440 | 11.7 | 7.4 | 0.20 | 40000 | 2.69 | |
| 15 | 5 | 0.30 | 696ZZ | 1730 | 670 | 13.3 | 7.9 | 0.30 | 40000 | 3.72 | |
| 17 | 6 | 0.30 | 606ZZ | 2260 | 835 | 14.8 | 8.2 | 0.30 | 38000 | 6.08 | |
| 19 | 6 | 0.30 | 626ZZ | 2340 | 885 | 16.5 | 8.5 | 0.30 | 32000 | 7.94 | |
| 22 | 7 | 0.30 | 636ZZ | 3300 | 1370 | 19.0 | 10.5 | 0.30 | 30000 | 14.00 | |
| 7 | 14 | 5 | 0.15 | 687ZZ | 1170 | 510 | 12.7 | 8.5 | 0.15 | 40000 | 2.97 |
| 17 | 5 | 0.30 | 697ZZ | 1610 | 710 | 14.8 | 10.2 | 0.30 | 36000 | 5.12 | |
| 19 | 6 | 0.30 | 607ZZ | 2340 | 885 | 16.5 | 9.1 | 0.30 | 36000 | 7.51 | |
| 22 | 7 | 0.30 | 627ZZ | 3300 | 1370 | 19.0 | 10.5 | 0.30 | 30000 | 12.90 | |
| 8 | 12 | 3.5 | 0.10 | MR128ZZ | 545 | 274 | 11.3 | 9.0 | 0.15 | 40000 | 0.97 |
| 14 | 4 | 0.20 | MR148ZZ | 820 | 385 | 12.8 | 9.2 | 0.20 | 38000 | 2.16 | |
| 16 | 5 | 0.20 | 688ZZ | 1610 | 710 | 14.2 | 10.2 | 0.20 | 36000 | 4.02 | |
| 19 | 6 | 0.30 | 698ZZ | 2240 | 910 | 16.5 | 10.0 | 0.30 | 36000 | 7.18 | |
| 22 | 7 | 0.30 | 608ZZ | 3300 | 1370 | 19.0 | 10.5 | 0.30 | 34000 | 12.20 | |
| 24 | 8 | 0.30 | 628ZZ | 3350 | 1430 | 20.5 | 12.0 | 0.30 | 28000 | 17.40 | |
| 28 | 9 | 0.30 | 638ZZ | 4550 | 1970 | 22.8 | 12.8 | 0.30 | 28000 | 28.60 | |
| 9 | 17 | 5 | 0.20 | 689ZZ | 1330 | 665 | 15.2 | 11.5 | 0.20 | 36000 | 4.43 |
| 20 | 6 | 0.30 | 699ZZ | 1720 | 840 | 17.2 | 12.0 | 0.30 | 34000 | 8.33 | |
| 24 | 7 | 0.30 | 609ZZ | 3350 | 1430 | 20.5 | 12.0 | 0.30 | 32000 | 14.70 | |
| 26 | 8 | 0.30 | 629ZZ | 4550 | 1970 | 22.8 | 12.8 | 0.30 | 28000 | 19.30 | |
With flange
| Main Dimensions (mm) | Bearing Number | Basic Load Rating | Installation Dimension (mm) Reference Values | Allowable Maximum Speed (min-1) Grease Lubricant rpm | Weight (g) Reference | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| d | D | D1 | B | C | rs (min) | Shields | Cr (N) | Cor (N) | da (max) | R (max) | ZZ | |
| 3 | 6 | 7.2 | 2.5 | 0.6 | 0.10 | MF63ZZ | 208 | 74 | 3.7 | 0.10 | 71000 | 0.33 |
| 4 | 7 | 8.2 | 2.5 | 0.6 | 0.10 | MF74ZZ | 255 | 107 | 4.8 | 0.10 | 60000 | 0.35 |
| 8 | 9.2 | 3 | 0.6 | 0.10 | MF84ZZ | 395 | 139 | 5.0 | 0.10 | 56000 | 0.63 | |
| 9 | 10.3 | 4 | 1.0 | 0.10 | F684ZZ | 640 | 225 | 5.2 | 0.10 | 53000 | 1.14 | |
| 10 | 11.6 | 4 | 0.8 | 0.20 | MF104ZZ | 710 | 270 | 5.9 | 0.20 | 50000 | 1.59 | |
| 11 | 12.5 | 4 | 1.0 | 0.20 | F694ZZ | 960 | 345 | 5.6 | 0.20 | 48000 | 1.96 | |
| 5 | 8 | 9.2 | 2.5 | 0.6 | 0.10 | MF85ZZ | 310 | 120 | 5.8 | 0.10 | 53000 | 0.41 |
| 9 | 10.2 | 3 | 0.6 | 0.15 | MF95ZZ | 430 | 168 | 6.0 | 0.15 | 50000 | 0.66 | |
| 10 | 11.6 | 4 | 0.8 | 0.15 | MF105ZZ | 430 | 168 | 6.0 | 0.20 | 50000 | 1.46 | |
| 11 | 12.6 | 4 | 0.8 | 0.15 | MF115ZZ | 715 | 276 | 6.3 | 0.15 | 48000 | 1.67 | |
| 11 | 12.5 | 5 | 1.0 | 0.15 | F685ZZ | 715 | 281 | 6.2 | 0.15 | 45000 | 2.18 | |
| 13 | 15.0 | 4 | 1.0 | 0.20 | F695ZZ | 1080 | 430 | 6.6 | 0.20 | 43000 | 2.84 | |
| Main Dimensions (mm) | Bearing Number | Basic Load Rating | Installation Dimension (mm) Reference Values | Allowable Maximum Speed (min-1) Grease Lubricant rpm | Weight (g) Reference | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| d | D | D1 | B | C | rs (min) | Shields | Cr (N) | Cor (N) | da (max) | R (max) | ZZ | |
| 6 | 10 | 11.2 | 3 | 0.6 | 0.15 | MF106ZZ | 495 | 218 | 7.0 | 0.15 | 45000 | 0.77 |
| 12 | 13.6 | 4 | 0.8 | 0.20 | MF126ZZ | 715 | 292 | 7.2 | 0.20 | 43000 | 1.94 | |
| 13 | 15.0 | 5 | 1.1 | 0.15 | F686ZZ | 1080 | 440 | 7.4 | 0.20 | 40000 | 3.04 | |
| 15 | 17.0 | 5 | 1.2 | 0.30 | F696ZZ | 1730 | 670 | 7.9 | 0.30 | 40000 | 4.26 | |
| 17 | 19.0 | 6 | 1.2 | 0.30 | F606ZZ | 2260 | 835 | 8.2 | 0.30 | 38000 | 6.61 | |
| 8 | 12 | 13.6 | 3.5 | 0.8 | 0.15 | MF128ZZ | 545 | 274 | 9.0 | 0.15 | 40000 | 1.15 |
| 14 | 15.6 | 4 | 0.8 | 0.20 | MF148ZZ | 820 | 385 | 9.2 | 0.20 | 38000 | 2.39 | |
| 16 | 18.0 | 5 | 1.1 | 0.20 | F688ZZ | 1610 | 710 | 10.2 | 0.20 | 36000 | 4.47 | |
| 19 | 22.0 | 6 | 1.5 | 0.30 | F698ZZ | 2240 | 910 | 10.0 | 0.30 | 36000 | 8.30 | |
| 22 | 25.0 | 7 | 1.5 | 0.30 | F608ZZ | 3300 | 1370 | 10.5 | 0.30 | 34000 | 13.50 | |
Cr = Basic dynamic load rating
Cor = Basic static load rating
Product specifications
- Inner and outer rings: SUJ2 (equivalent)
- Ball: SUJ2 (equivalent)
- Retainer: SPCC/SUS304 (equivalent)
- Shields: SPCC/ SUS304 (equivalent)
- Lubricating oil: Lithium-based grease
- Accuracy grade: JIS Grade 0
- Clearance: MC3
Technical Information
Permissible differences and tolerance values of inner rings / Permissible differences and tolerances value of outer ring width
Units/μm
| Nominal Bearing Inner Diameter d (mm) | Dimensional Deviations of Mean Inner Diameter in a Single Plane ⊿dmp | Dimensional Deviations of Inner Diameter ⊿ds | Variations of Inner Diameter in a Single Plane Vdp | Variations of Mean Inner Diameter in a Single Plane Vdmp | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Class 0 | Class 6 | Class 5 | Class 4 | Class 4 | Class 0 | Class 6 | Class 5 | Class 4 | Class 0 | Class 6 | Class 5 | Class 4 | |||||||||||||
| Diameter Series | |||||||||||||||||||||||||
| 0, 1, 2, 3, 4 | 9 | 0, 1 | 2, 3, 4 | 9 | 0, 1 | 2, 3, 4 | 9 | 0, 1, 2, 3, 4 | 9 | 0, 1, 2, 3, 4 | |||||||||||||||
| Over | Incl. | Upper | Lower | Upper | Lower | Upper | Lower | Upper | Lower | Upper | Lower | Max. | Max. | Max. | Max. | Max. | Max. | Max. | Max. | ||||||
| 2.5 10 18 30 50 | 10 18 30 50 80 | 0 0 0 0 0 | -8 -8 -10 -12 -15 | 0 0 0 0 0 | -7 -7 -8 -10 -12 | 0 0 0 0 0 | -5 -5 -6 -8 -9 | 0 0 0 0 0 | -4 -4 -5 -6 -7 | 0 0 0 0 0 | -4 -4 -5 -6 -7 | 10 10 13 15 19 | 8 8 10 12 19 | 6 6 8 9 11 | 9 9 10 13 15 | 7 7 8 10 15 | 5 5 6 8 9 | 5 5 6 8 9 | 4 4 5 6 7 | 4 4 5 6 7 | 3 3 4 5 5 | 6 6 8 9 11 | 5 5 6 8 9 | 3 3 3 4 5 | 2 2 2.5 3 3.5 |
| Nominal Bearing Inner Diameter d (mm) | Dimensional Deviations of Inner Ring Width ⊿Bs | Variations of Inner Ring Width VBs | Radial Runout of Inner Ring Kia | Lateral Runout of Inner Ring Sd | Axial Runout of Inner Ring Sia | Dimensional Deviations of Outer Ring Width ⊿Cs | Variations of Outer Ring Width VCs | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Class 0, Class 6 | Class 5, Class 4 | Class 0 | Class 6 | Class 5 | Class 4 | Class 0 | Class 6 | Class 5 | Class 4 | Class 5 | Class 4 | Class 5 | Class 4 | Class 0, Class 6 | Class 5, Class 4 | Class 0 | Class 6 | ||||||
| Over | Incl. | Upper | Lower | Upper | Lower | Max. | Max. | Max. | Max. | Max. | Max. | Max. | Max. | Max. | Max. | Max. | Max. | Upper | Lower | Upper | Lower | Max. | Max. |
| 2.5 10 18 30 50 | 10 18 30 50 80 | 0 0 0 0 0 | -120 -120 -120 -120 -150 | 0 0 0 0 0 | -40 -80 -120 -120 -150 | 15 20 20 20 25 | 15 20 20 20 25 | 5 5 5 5 6 | 2.5 2.5 2.5 3 4 | 10 10 13 15 20 | 6 7 8 10 10 | 4 4 4 5 5 | 2.5 2.5 3 4 4 | 7 7 8 8 8 | 3 3 4 4 5 | 7 7 8 8 8 | 3 3 4 4 5 | 0 0 0 0 0 | -120 -120 -120 -120 -150 | 0 0 0 0 0 | -40 -80 -120 -120 -150 | 15 20 20 20 25 | 15 20 20 20 25 |
Permissible differences and tolerance values of outer ring
Units/μm
| Nominal Bearing Outer Diameter D (mm) | Dimensional Deviations of Mean Outer Diameter in a Single Plane ⊿Dmp | Variations of Mean Outer Diameter in a Single Plane VDmp | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Class 0 | Class 6 | Class 5 | Class 4 | Class 0 | Class 6 | Class 5 | Class 4 | ||||||
| Over | Incl. | Upper | Lower | Upper | Lower | Upper | Lower | Upper | Lower | Max. | Max. | Max. | Max. |
| *2.5 6 18 30 50 80 | 6 18 30 50 80 120 | 0 0 0 0 0 0 | -8 -8 -9 -11 -13 -15 | 0 0 0 0 0 0 | -7 -7 -8 -9 -11 -13 | 0 0 0 0 0 0 | -5 -5 -6 -7 -9 -10 | 0 0 0 0 0 0 | -4 -4 -5 -6 -7 -8 | 6 6 7 8 10 11 | 5 5 6 7 8 10 | 3 3 3 4 5 5 | 2 2 2.5 3 3.5 4 |
| Nominal Bearing Outer Diameter D (mm) | Dimensional Deviations of Outer Diameter ⊿Ds | Variations of Outer Diameter in a Single Plane VDp | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Class 0 | Class 6 | Class 5 | Class 4 | ||||||||||||
| Class 4 | Open bearings | Seal Shield bearings | Open bearings | Seal Shield bearings | Open bearings | Open bearings | |||||||||
| Diameter Series | |||||||||||||||
| 0, 1, 2, 3, 4 | 9 | 0, 1 | 2, 3, 4 | 2, 3, 4 | 9 | 0, 1 | 2, 3, 4 | 0, 1, 2, 3, 4 | 9 | 0, 1, 2, 3, 4 | 9 | 0, 1, 2, 3, 4 | |||
| Over | Incl. | Upper | Lower | Max. | Max. | Max. | Max. | ||||||||
| *2.5 6 18 30 50 80 | 6 18 30 50 80 120 | 0 0 0 0 0 0 | -4 -4 -5 -6 -7 -8 | 10 10 12 14 16 19 | 8 8 9 11 13 19 | 6 6 7 8 10 11 | 10 10 12 16 20 26 | 9 9 10 11 14 16 | 7 7 8 9 11 16 | 5 5 6 7 8 10 | 9 9 10 13 16 20 | 5 5 6 7 9 10 | 4 4 5 5 7 8 | 4 4 5 6 7 8 | 3 3 4 5 5 6 |
Units/μm
| Nominal Bearing Outer Diameter D (mm) | Radial Runout of Outer Ring Kea | Perpendicularity of Outer Diameter Surface SD | Axial Runout of Outer Ring Sea | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Class 0 | Class 6 | Class 5 | Class 4 | Class 5 | Class 4 | Class 5 | Class 4 | ||
| Over | Incl. | Max. | Max. | Max. | Max. | Max. | Max. | Max. | Max. |
| *2.5 6 18 30 50 80 | 6 18 30 50 80 120 | 15 15 15 20 25 35 | 8 8 9 10 13 18 | 5 5 6 7 8 10 | 3 3 4 5 5 6 | 8 8 8 8 8 9 | 4 4 4 4 4 5 | 8 8 8 8 10 11 | 5 5 5 5 5 6 |
*2.5mm is included in this size category.
Tolerance values of flanged bearings
Units/μm
| Nominal Flange Outer Diameter D1 (mm) | Dimensional Deviations of Flange Outer Diameter ⊿D1s | ||
|---|---|---|---|
| Over | Incl. | Upper | Lower |
10 18 | 10 18 30 | +220 +270 +330 | -36 -43 -52 |
Permissible differences and tolerance values of flange width / Tolerance values of rotational accuracy related to flanges
Units/μm
| Nominal Bearing Outer Diameter D (mm) | Dimensional Deviations of Flange Width ⊿C1s | Variations of Flange Width VC1s | Perpendicularity of Outer Diameter Surface of Bearings with respect to Back Face of Flange SD1 | Axial Runout of Back Face of Flange Sea1 | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Class 0 | Class 6 | Class 5 | Class 4 | Class 0 | Class 6 | Class 5 | Class 4 | Class 5 | Class 4 | Class 5 | Class 4 | ||||||||
| Over | Incl. | Upper Lower | Max. | Max. | Max. | ||||||||||||||
| *2.5 6 18 | 6 18 30 | Based on the tolerance of ⊿Bs for d of the same bearing in the same class. | Based on the tolerance of ⊿VBs for d of the same bearing in the same class. | 5 5 5 | 25 2.5 2.5 | 1.5 1.5 1.5 | 8 8 8 | 4 4 4 | 1.5 1.5 1.5 | 11 11 11 | 7 7 7 | 3 3 3 | |||||||
*2.5mm is included in this size category.
■ General fitting standard (outline)
● Shaft
| Radial Bearings (Class 0, Class 6X, Class 6) | MISUMI Products | ||||
|---|---|---|---|---|---|
| Conditions | Ball Bearings | Shaft Tolerance Class | |||
| Shaft Dia (mm) | |||||
| Types of load | Sizes of load, etc. | Over | Incl. | ||
| Inner ring rotation load Load with variable directions | Light load Variable load | － | 18 | h5 | Shaft |
| 18 | 100 | js6 | － | ||
| 100 | 200 | k6 | － | ||
| Normal load | － | 18 | js5 | － | |
| 18 | 100 | k5 | － | ||
| 100 | 140 | m5 | － | ||
| Inner ring static load | The inner ring is required to move easily on the shaft | Total shaft dia | g6 | Shaft rotation axis | |
| The inner ring is not required to move easily on the shaft | Total shaft dia | h6 | － | ||
● Housing
| Radial Bearings (Class 0, Class 6X, Class 6) | ||||
|---|---|---|---|---|
| Conditions | Housing Tolerance Class | Housing | ||
| Types of load | Sizes of load, etc. | Outer Ring Axial Movement | ||
| Outer ring static load | Each load (light, medium, heavy) | Can be easily moved | H7 | Integrated Split |
| The shaft and inner ring become hot | Can be easily moved | G7 | ||
| Requires precision rotation with light or normal loads | Usually cannot be moved | K6 | Integrated | |
| Can be moved | JS6 | |||
| Requires quiet operation | Can be easily moved | H6 | ||
| Load with variable directions | Light load, normal load | Usually able to move | JS7 | |
| Normal load, heavy load | Usually cannot be moved | K7 | ||
| Large impact loads | Cannot be moved | M7 | ||
| Outer ring rotation load | Light load, variable load | Cannot be moved | M7 | |
| Normal load, heavy load | Cannot be moved | N7 | ||
| Heavy load with thin wall housing | Cannot be moved | P7 | ||
[!] Based on JIS B 1566 (2015) Annex B (reference).
[!] Load position
● Inner ring rotating load: The load position on the inner ring changes.
● Inner ring static load: The load position on the inner ring does not change.
● Outer ring rotation load: The load position on the outer ring changes.
● Outer ring static load: The load position on the outer ring does not change.
● Load with variable directions: Load position is uncertain
(Reference: See selections of fitting combinations)
● Inner ring rotating load: The load position on the inner ring changes.
● Inner ring static load: The load position on the inner ring does not change.
● Outer ring rotation load: The load position on the outer ring changes.
● Outer ring static load: The load position on the outer ring does not change.
● Load with variable directions: Load position is uncertain
(Reference: See selections of fitting combinations)
[!] Types of load
● Light load: 6% or less of the basic dynamic load rating.
● Normal load: More than 6% and less than 12% of the basic dynamic load rating.
● Heavy load: Exceeds 12% of the basic dynamic load rating.
● Light load: 6% or less of the basic dynamic load rating.
● Normal load: More than 6% and less than 12% of the basic dynamic load rating.
● Heavy load: Exceeds 12% of the basic dynamic load rating.