When you need maximum radial load capacity in minimal space, BK Series Drawn Cup Needle Roller Bearings deliver exceptional performance through their unique closed-end design. These specialized bearings feature a thin-walled, deep-drawn outer ring manufactured from case-hardened steel. The closed bottom eliminates the need for separate end caps while providing effective sealing at shaft terminals. You'll find these bearings particularly valuable in automotive transmissions and industrial applications where space constraints demand compact solutions without compromising load capacity.

The technical foundation of these bearings centers on a case-hardened steel outer cup combined with high-carbon chromium steel needle rollers. The outer ring utilizes low-carbon steel (typically ST14 or equivalent) that's deep-drawn to create the characteristic cup shape with integrated bottom closure.
The bearing structure consists of three primary components working in harmony. The outer cup provides the raceway surface and structural integrity. High-precision needle rollers distribute radial loads efficiently across the contact area. The cage assembly maintains proper roller spacing and prevents skewing during operation.
| Component | Material | Grade/Standard | Heat Treatment |
|---|---|---|---|
| Outer Cup | ST14 Low Carbon Steel | Case-hardened | 58-64 HRC |
| Needle Rollers | GCr15 Bearing Steel | G2 Precision | Through-hardened |
| Cage | Steel Stamped/PA66 | - | - |
The bearing works on the rule of rolling contact between needle rollers and the raceway surfaces. The thin-profile rollers make line contact or maybe than point contact, dispersing loads over a bigger surface range. This plan empowers you to accomplish higher stack appraisals compared to ball orientation of proportionate size.
The closed-end setup gives hub direction for the shaft whereas keeping up the bearing's essential spiral stack work. The obstructions fit mounting strategy guarantees legitimate arrangement and dispenses with the require for extra maintenance hardware.
Space Efficiency
You can accomplish critical space investment funds due to the negligible outspread cross-section tallness. The bearing's external distance across closely matches the lodging bore, whereas the spiral thickness breaks even with fair the needle roller breadth also the glass divider thickness.
High Stack Capacity
The ceaseless line contact between rollers and raceways empowers uncommon spiral stack dissemination. You'll ordinarily see stack evaluations 30-40% higher than proportionate ball bearings.
Integrated Sealing
The closed foot plan gives characteristic assurance against contaminants whereas avoiding grease spillage. This dispenses with your require for partitioned fixing components in numerous applications.
Cost-Effective Installation
The obstructions fit mounting disentangles lodging plan prerequisites. You won't require machined shoulders, snap ring grooves, or partitioned maintenance equipment.
|
Bearing Designations
|
Shaft Diameter(mm)
|
Boundary Dimensions(mm)
|
Basic Load Rating(N)
|
Limiting Speed(r/min)
|
Weight(g)
|
|||
|
|
|
Fw
|
D
|
C
|
Cr
|
Cor
|
Oil
|
|
|
BK0306
|
3
|
3
|
6.5
|
6
|
1320
|
950
|
6000
|
1.6
|
|
BK0408
|
4
|
4
|
8
|
8
|
1540
|
1070
|
40000
|
1.8
|
|
BK0509
|
5
|
5
|
9
|
9
|
2200
|
1790
|
36000
|
2.1
|
|
BK0608
|
6
|
6
|
10
|
8
|
1830
|
1550
|
32000
|
2.2
|
|
BK0609
|
6
|
6
|
10
|
9
|
2650
|
2400
|
30000
|
2.6
|
|
BK0709
|
7
|
7
|
11
|
9
|
2800
|
2150
|
27000
|
2.9
|
|
BK0808
|
8
|
8
|
12
|
8
|
2550
|
2400
|
21000
|
3
|
|
BK0810
|
8
|
8
|
12
|
10
|
3700
|
3450
|
21000
|
3.4
|
|
BK08X14X10
|
8
|
8
|
14
|
10
|
3800
|
3950
|
25000
|
5.8
|
|
BK0908
|
9
|
9
|
13
|
8
|
3650
|
4050
|
25000
|
3.4
|
|
BK0910
|
9
|
9
|
13
|
10
|
4050
|
4250
|
25000
|
4.3
|
|
BK0912
|
9
|
9
|
13
|
12
|
5000
|
6000
|
25000
|
4.9
|
|
BKl010
|
10
|
10
|
14
|
10
|
3900
|
4800
|
19000
|
4.3
|
|
BKl012
|
10
|
10
|
14
|
12
|
5000
|
6300
|
19000
|
5
|
|
BKl015
|
10
|
10
|
14
|
15
|
6700
|
7800
|
19000
|
6.2
|
|
BKl0X16X10
|
10
|
10
|
16
|
10
|
6800
|
8800
|
18000
|
6.8
|
|
BKl210
|
12
|
12
|
16
|
10
|
4150
|
5800
|
19000
|
5.2
|
|
BKl212
|
12
|
12
|
16
|
12
|
3800
|
5100
|
15000
|
6.2
|
|
BKl2X18X12
|
12
|
12
|
18
|
12
|
5500
|
6300
|
17000
|
10.3
|
|
BKl312
|
13
|
13
|
19
|
12
|
6200
|
7100
|
17000
|
11.2
|
|
BKl410
|
14
|
14
|
20
|
10
|
6700
|
7000
|
16000
|
12.1
|
|
BKl512
|
15
|
15
|
21
|
12
|
7000
|
8400
|
14000
|
12.7
|
|
BKl515
|
15
|
15
|
21
|
15
|
9800
|
11400
|
14000
|
14.2
|
|
BKl516
|
15
|
15
|
21
|
16
|
9800
|
11400
|
14000
|
16.5
|
|
BKl518
|
15
|
15
|
21
|
18
|
10100
|
10800
|
14000
|
18
|
|
BKl522
|
15
|
15
|
21
|
22
|
10400
|
16500
|
14000
|
22
|
|
BKl612
|
16
|
16
|
22
|
12
|
7100
|
9200
|
14000
|
13.8
|
|
BKl616
|
16
|
16
|
22
|
16
|
10100
|
14300
|
14000
|
17.6
|
|
BKl622
|
16
|
16
|
22
|
22
|
11100
|
17400
|
14000
|
23.4
|
|
BKl712
|
17
|
17
|
23
|
12
|
6900
|
9300
|
13000
|
14.5
|
|
BKl716
|
17
|
17
|
23
|
16
|
8500
|
12500
|
10000
|
14.6
|
|
BKl812
|
18
|
18
|
24
|
12
|
7100
|
9900
|
12000
|
14.9
|
|
BKl816
|
18
|
18
|
24
|
16
|
10600
|
15300
|
12000
|
19.9
|
|
BK2010
|
20
|
20
|
26
|
10
|
5900
|
7200
|
10000
|
14
|
|
BK2012
|
20
|
20
|
26
|
12
|
7600
|
10100
|
10000
|
16.7
|
|
BK2016
|
20
|
20
|
26
|
16
|
11700
|
29100
|
10000
|
22.3
|
|
BK2020
|
20
|
20
|
26
|
20
|
13700
|
24000
|
10000
|
27.1
|
|
BK2030
|
20
|
20
|
26
|
30
|
21800
|
40000
|
10100
|
43
|
|
BK2212
|
22
|
22
|
28
|
12
|
8100
|
10400
|
10100
|
18.1
|
|
BK2216
|
22
|
22
|
28
|
16
|
11400
|
18100
|
10100
|
24.3
|
|
BK2220
|
22
|
22
|
28
|
20
|
14500
|
25000
|
10100
|
29.9
|
|
BK2512
|
25
|
25
|
32
|
12
|
10000
|
14200
|
9000
|
23.2
|
|
BK2516
|
25
|
25
|
32
|
16
|
13600
|
50000
|
9000
|
31
|
|
BK2520
|
25
|
25
|
32
|
20
|
17900
|
30000
|
9000
|
38.7
|
|
BK2526
|
25
|
25
|
32
|
26
|
22500
|
42000
|
9000
|
49
|
|
BK2538
|
25
|
25
|
32
|
38
|
30000
|
58000
|
9000
|
69
|
|
BK2816
|
28
|
28
|
35
|
16
|
15400
|
22500
|
8700
|
34.1
|
|
BK2820
|
28
|
28
|
35
|
20
|
18900
|
32000
|
8700
|
43
|
|
BK3012
|
30
|
30
|
37
|
12
|
10100
|
16200
|
8100
|
27.9
|
|
BK3016
|
30
|
30
|
37
|
16
|
15200
|
27000
|
8100
|
37.1
|
|
BK3020
|
30
|
30
|
37
|
20
|
19700
|
33500
|
8100
|
46.5
|
|
BK3026
|
30
|
30
|
37
|
26
|
24000
|
50000
|
8100
|
59.4
|
|
BK3038
|
30
|
30
|
37
|
38
|
32500
|
74000
|
8100
|
82.5
|
|
BK3512
|
35
|
35
|
42
|
12
|
12100
|
19300
|
7100
|
32.9
|
|
BK3516
|
35
|
35
|
42
|
16
|
15700
|
27500
|
7100
|
43.8
|
|
BK3520
|
35
|
35
|
42
|
20
|
20800
|
41000
|
7100
|
54.8
|
|
BK3530
|
35
|
35
|
42
|
30
|
20801
|
41001
|
7101
|
58.4
|
|
BK4012
|
40
|
40
|
47
|
12
|
14000
|
24300
|
6300
|
38.2
|
|
BK4016
|
40
|
40
|
47
|
16
|
20000
|
38500
|
6300
|
51
|
|
BK4020
|
40
|
40
|
47
|
20
|
25500
|
52000
|
6300
|
62
|
|
BK4512
|
45
|
45
|
52
|
12
|
12900
|
22500
|
5800
|
45
|
|
BK4516
|
45
|
45
|
52
|
16
|
19300
|
38000
|
5800
|
56
|
|
BK4520
|
45
|
45
|
52
|
20
|
22000
|
51000
|
5800
|
72
|
|
BK5020
|
50
|
50
|
58
|
20
|
28000
|
60000
|
5300
|
87.3
|
|
BK5025
|
50
|
50
|
58
|
25
|
34500
|
80000
|
5300
|
109
|
|
BK5520
|
55
|
55
|
63
|
20
|
29500
|
59900
|
4600
|
93.8
|
|
BK5528
|
55
|
55
|
63
|
28
|
39090
|
98000
|
4600
|
132
|
|
BK6012
|
60
|
60
|
68
|
12
|
12400
|
29000
|
4100
|
77
|
|
BK6020
|
60
|
60
|
68
|
20
|
30500
|
72000
|
4100
|
105
|
|
BK6032
|
60
|
60
|
68
|
32
|
50000
|
131000
|
4100
|
164
|

Car Industry
You'll discover these orientation broadly utilized in programmed transmissions, manual gearboxes, and differential congregations. The compact plan suits cutting edge lightweighting necessities whereas taking care of the tall loads ordinary in powertrain applications.
Industrial Equipment
Machine device shafts, printing apparatus, and material gear advantage from the space-efficient plan. The coordinates fixing demonstrates especially profitable in situations with constrained support access.
Motorcycle Applications
Engine applications and transmission frameworks in cruisers utilize these orientation where weight and space limitations are basic plan factors.
Our fabricating handle actualizes comprehensive quality control measures all through generation. Crude fabric review confirms steel composition and hardness properties some time recently handling. In-process observing guarantees dimensional precision and surface wrap up quality amid container shaping and warm treatment operations.
Final assessment incorporates vibration testing, dimensional confirmation, and stack testing on test bunches. Each generation run experiences confirmation of 12 center execution pointers. Our quality control framework keeps up an ex-factory capability rate surpassing 99.9%.
We provide comprehensive customization services for non-standard applications. Our engineering team analyzes your specific operating conditions to recommend optimal bearing configurations. BK Series Drawn Cup Needle Roller Bearings can be modified for special dimensional requirements, alternative materials, or enhanced performance characteristics.
Standard delivery time for catalog items is 7 working days. Custom configurations typically require 15-20 days depending on specification complexity. Sample services are available for evaluation and testing purposes.
Proper installation requires careful attention to housing bore tolerances and interference fit specifications. The housing bore should maintain H7 tolerance for optimal performance. During installation, apply force only to the outer ring to prevent roller damage.
Regular maintenance involves periodic lubrication according to operating conditions. High-speed applications may require synthetic lubricants, while standard mineral oils suit most industrial applications. Monitor bearing temperatures during initial operation to verify proper installation and lubrication.

With 30 years of bearing industry experience, we deliver reliable BK Series Drawn Cup Needle Roller Bearings backed by comprehensive technical support. Our integrated manufacturing capabilities ensure consistent quality while providing flexible customization options for unique applications.
Our supply chain network maintains inventory of over 1,000 bearing types for rapid delivery. Regional warehousing centers enable 48-hour delivery for standard configurations. Technical support includes on-site installation guidance and full-lifecycle maintenance planning.
For technical specifications, custom solutions, or ordering information, contact our engineering team at auto@lyautobearing.com. We provide detailed application analysis to ensure optimal bearing selection for your specific requirements.
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