Rollerblading, inline skating and skateboarding.  The high precision provides high speed and the convenience of removal shields for cleaning and relubrication. Our skating bearings with their terrific speed and close tolerances. These special bearings are manufactured to the exact ABEC tolerances necessary to bring you absolute speed and durability in your rollerblading and skateboarding endeavors!

The balls are usually made out of steel? What kind? Are they honed into balls? Are they the same material as the races?
Races:
The races are the “tracks” that the balls roll in. The balls sit in between the inner and outer races. (show diagram). How are races made?
Shields:
The shields cover the innards of the bearings. They are usually made of thin sheet metal. New shield designs have led to rubber and plastic shields. Shields can be removable. Removable shields are a convenient feature for cleaning and maintaining your skateboard bearings.

Bearing Designation

Bore Diamete(d)

Outer Diameter(D)

Width(b)

LoadRating Cr(N)

LoadRating Cor(N)

Max. Speed

open

zz

Grease

Oil

*1000rpm

681

1

3

1

-

96

26

130

150

691

4

1.6

-

141

37

100

120

681Xzz

1.5

4

1.2

2

112

33

100

120

691Xzz

5

2

2.6

169

50

85

100

601Xzz

6

2.5

3

330

99

75

90

682zz

2

5

1.5

2.3

169

50

85

100

MR52zz

5

2

2.5

169

50

85

100

692zz

6

2.3

3

330

99

75

90

MR62zz

6

2.5

2.5

330

99

75

90

MR72zz

7

2.8

3

386

129

63

75

602zz

7

2.8

3.5

386

129

60

71

682Xzz

2.5

6

1.8

2.6

209

74

71

80

692Xzz

7

2.5

3.5

386

129

63

75

MR82X

8

2.5

-

558

180

60

67

602Xzz

8

2.8

4

552

177

60

71

MR63zz

3

6

2

2.5

209

74

71

80

683zz

7

2

3

311

112

63

75

MR83zz

8

2.5

3

395

141

60

67

693zz

8

3

4

558

180

60

67

MR93zz

9

2.5

4

571

189

56

67

603zz

9

3

5

571

189

56

67

623zz

10

4

4

631

219

50

60

633zz

13

5

5

1301

488

40

48

MR74zz

4

7

2

2.5

255

108

60

67

MR84zz

8

2

3

395

141

56

67

684zz

9

2.5

4

641

227

53

63

MR104zz

10

3

4

711

272

48

56

694zz

11

4

4

957

350

48

56

604zz

12

4

4

957

350

48

56

624zz

13

5

5

1301

488

40

48

634zz

16

5

5

1340

523

36

43

MR85zz

5

8

2

2.5

218

90

53

63

MR95zz

9

2.5

3

431

169

50

60

MR105zz

10

3

4

431

169

50

60

MR115zz

11

-

4

716

282

45

53

685zz

11

3

5

716

282

45

53

695zz

13

4

4

1077

432

43

50

605zz

14

5

5

1329

507

40

50

625zz

16

5

5

1729

675

36

43

635zz

19

6

6

2336

896

32

40

MR106zz

6

10

2.5

3

496

218

45

53

MR126zz

12

3

4

716

295

43

50

686zz

13

3.5

5

1082

442

40

50

696zz

15

5

5

1340

523

40

45

606zz

17

6

6

2263

846

38

45

626zz

19

6

6

2336

896

32

40

636zz

22

7

7

3333

1423

30

36

MR117zz

7

11

2.5

3

455

202

43

50

MR137zz

13

3

4

541

276

40

48

687zz

14

3.5

5

1173

513

40

50

697zz

17

5

5

1605

719

36

43

607zz

19

6

6

2336

896

36

43

627zz

22

7

7

3287

1379

30

36

637zz

26

9

6

4563

1983

28

34

MR128zz

8

12

2.5

3.5

543

274

40

48

MR148zz

14

3.5

4

817

386

38

45

688zz

16

4

5

1252

592

36

43

698zz

19

6

6

2237

917

36

43

608z

22

7

7

3293

1379

34

40

628zz

24

8

8

3333

1423

28

34

638zz

28

9

9

4563

1983

28

34

679zz

9

14

3

4.5

919

468

36

42

689zz

17

4

5

1327

668

36

43

699zz

20

6

6

2467

1081

34

40

609zz

24

7

7

3356

1444

32

38

629zz

26

8

8

4575

1983

28

34

639zz

30

10

10

4659

2080

24

30

6700zz

10

15

4

4

855

435

15

17

6800zz

19

5

5

1716

840

37

43

6900zz

22

6

6

2695

1273

34

41

6000zz

26

8

8

4550

1970

30

36

6200zz

30

9

9

5100

2390

24

30

6300zz

35

11

11

8100

3450

22

26

6701zz

12

18

4

4

926

530

13

15

6801zz

21

5

5

1915

1041

33

39

6901zz

24

6

6

2886

1466

31

36

6001zz

28

8

8

5100

2370

28

32

6201zz

32

10

10

6800

3050

22

28

6301zz

37

12

12

9700

4200

990

425