The ball-roller combined slewing bearing is a specially designed combined structure bearing that integrates both steel balls and rollers as rolling elements,also roller and ball bearings .This innovative design combines the smooth and flexible rotation of a ball bearing with the high load-carrying capacity of a roller bearing, making it ideal for heavy-duty and precision applications.
Ball-Roller Combined Slewing Bearing With External Gear
Bearing Model
Dimensions
External gear parameters
D
d
T
D₁
d₁
d
dm
n
n₁
H
h
b
m
d
z
xm
221.32.3550
3698
3358
159
3638
3418
30
M27
76
10
143
50
109
16
3772.8
232
16
221.32.3750
3906
3558
159
3846
3618
30
M27
80
10
143
50
109
16
3980.8
246
8
221.32.4000
4146
3808
159
4086
3868
30
M27
84
12
143
50
109
16
4220.8
261
8
221.32.4250
4402
4058
159
4342
4118
30
M27
90
12
143
50
109
16
4476.8
276
16
221.36.4000
4161
3792
175
4095
3858
33
M30
76
12
159
50
125
18
4244.4
232
18
221.36.4250
4413
4042
175
4347
4108
33
M30
80
12
159
50
125
18
4496.4
247
9
221.36.4500
4665
4292
175
4599
4358
33
M30
84
14
159
50
125
18
4748.4
261
9
221.36.4750
4917
4542
175
4851
4608
33
M30
90
14
159
50
125
18
5000.4
275
9
221.40.4500
4684
4276
183
4612
4348
36
M33
72
14
167
50
133
20
4776
236
10
221.40.4750
4924
4526
183
4852
4598
36
M33
76
14
167
50
133
20
5016
248
10
221.40.5000
5184
4776
183
5112
4848
36
M33
80
16
167
50
133
20
5276
261
10
221.40.5300
5484
5076
183
5412
5148
36
M33
84
16
167
50
133
20
5576
276
10
221.45.5000
5195
4747
203
5117
4825
39
M36
76
16
187
50
153
22
5297.6
238
11
221.45.5300
5503
5047
203
5425
5125
39
M36
80
16
187
50
153
22
5605.6
252
11
221.45.5600
5789
5347
203
5711
5425
39
M36
84
18
187
50
153
22
5891.6
265
11
221.45.6000
6185
5747
203
6107
5825
39
M36
90
18
187
50
153
22
6287.6
282
22
221.50.5600
5808
5342
221
5730
5420
39
M36
90
18
205
65
156
24
5923.2
244
12
221.50.6000
6192
5742
221
6114
5820
39
M36
96
18
205
65
156
24
6307.2
260
12
221.50.6700
6912
6442
221
6834
6520
39
M36
108
20
205
65
156
24
7027.2
290
12
Ball-Roller Combined Slewing Bearing Without Gear
Bearing Model
Dimensions
Mounting Dimensions
Structural Dimension
D
d
T
D₁
d₁
d
dm
n
n₁
H
h
b
m
220.32.3550
3698
3358
159
3638
3418
30
M27
76
10
143
50
109
16
220.32.3750
3906
3558
159
3846
3618
30
M27
80
10
143
50
109
16
220.32.4000
4146
3808
159
4086
3868
30
M27
84
12
143
50
109
16
220.32.4250
4402
4058
159
4342
4118
30
M27
90
12
143
50
109
16
220.36.4000
4161
3792
175
4095
3858
33
M30
76
12
159
50
125
18
220.36.4250
4413
4042
175
4347
4108
33
M30
80
12
159
50
125
18
220.36.4500
4665
4292
175
4599
4358
33
M30
84
14
159
50
125
18
220.36.4750
4917
4542
175
4851
4608
33
M30
90
14
159
50
125
18
220.40.4500
4684
4276
183
4612
4348
36
M33
72
14
167
50
133
20
220.40.4750
4924
4526
183
4852
4598
36
M33
76
14
167
50
133
20
220.40.5000
5184
4776
183
5112
4848
36
M33
80
16
167
50
133
20
220.40.5300
5484
5076
183
5412
5148
36
M33
84
16
167
50
133
20
220.45.5000
5195
4747
203
5117
4825
39
M36
76
16
187
50
153
22
220.45.5300
5503
5047
203
5425
5125
39
M36
80
16
187
50
153
22
220.45.5600
5789
5347
203
5711
5425
39
M36
84
18
187
50
153
22
220.45.6000
6185
5747
203
6107
5825
39
M36
90
18
187
50
153
22
220.50.5600
5808
5342
221
5730
5420
39
M36
90
18
205
65
156
24
220.50.6000
6192
5742
221
6114
5820
39
M36
96
18
205
65
156
24
220.50.6700
6912
6442
221
6834
6520
39
M36
108
20
205
65
156
24
Ball-roller combined slewing bearing features
1. Dual Load Capacity: Ball-roller slewing bearings consist of one row of ball rolling elements and one row of cylindrical rolling elements. This ball and roller combination design combines the advantages of ball bearings (light load, high speed, low friction) and roller bearings (heavy load, high rigidity). The combination of balls and rollers allows the bearing to withstand high axial loads, radial loads, and overturning moments simultaneously.
2. Optimized Load Distribution: Balls provide smooth rotation and lower friction, while rollers offer higher load capacity. This hybrid design ensures a balanced load distribution.
3. Smooth and Precise Rotation: Ball raceways ensure stable, low-resistance motion, improving rotational accuracy and maintaining stable performance even at low speeds.
4 Compact Structure and Superior Performance: Compared to common slewing bearings, ball-roller combination bearings offer higher load capacity without increasing size, enabling more compact equipment layouts.
5. Long Service Life: With optimized contact geometry and high-strength materials, this bearing offers superior wear resistance and a longer service life, making it particularly suitable for heavy-duty or continuous rotation applications.
Precision Machining: The outer ring, inner ring, and raceway are all precisely machined using CNC machining centers. Precision machining dimensions range from 300mm to 15000mm, and bearing accuracy covers P0-P5. Dimensional tolerances are controlled within ±0.02mm, ensuring smooth rotation and positioning accuracy.
Heat Treatment and Hardening: Key bearing components undergo quenching and surface tempering treatment, achieving a hardness of HRC58–62, providing excellent wear resistance and long-term stability.
Compact Design: Achieving high rigidity and high load-bearing capacity within a limited space, suitable for large engineering machinery, offshore platforms, port equipment, and wind turbine rotating structures.
Bearing Lubrication and Sealing: LTZC provides high wear-resistant and corrosion-resistant materials such as FKM, NBR, and PU, along with a special sealing design to extend the bearing's service life.
LTZC possesses a complete independent production system and large-scale precision machining capabilities. LTZC can produce large slewing bearings with diameters ranging from300mm to 15000mm and holds international certifications including ISO9001, 14001, 45001, CCS, BV, and ABS. LTZC bearings are suitable for marine engineering equipment, wind power, port machinery, construction machinery, and ultra-heavy-duty rotating structures. The products feature high load-bearing capacity, high stability, and long service life, meeting the continuous operation requirements under harsh working conditions.
With over 20 years of experience in bearing R&D, our global service network covers countries such as India and Russia, ensuring fast and efficient technical support for all bearing issues and ensuring the smooth operation of your equipment.
Advanced CNC production equipment and manufacturing processes guarantee bearing precision and durability. LTZC bearings also carry third-party testing reports to ensure they meet international standards.
LTZC products include slewing bearings, slewing drives, precision thin-wall bearings, and custom bearings. They are widely used in cranes, heavy machinery, and port machinery, maintaining stable performance under harsh operating conditions.
Our experienced technical team provides customized bearing solutions for complex applications. Services include load analysis and bearing selection, service life calculations, 3D design, and engineering drawings.
LTZC slewing bearing manufacturer
LTZC Bearings is a trusted bearing manufacturer specializing in slewing bearings, slewing drives, and precision bearings. With advanced CNC machining equipment, comprehensive heat treatment, and strict quality control, our products meet international standards and are ISO certified.
We export high-quality industrial bearings to Germany, India, Russia, and Canada, earning over 10,000 satisfied customer feedbacks. With strong OEM and ODM capabilities, LTZC provides fast delivery and custom bearing solutions for heavy machinery, construction, and automation industries.
LTZC is a professional slewing bearing manufacturer，providing a full range of custom bearing services, including slewing rings, non-standard bearings, large bearings, thin-section bearings, crossed roller bearings, and four-point contact ball bearings. Whether the requirements are special sizes, materials, or complex operating conditions, we can provide customers with the optimal solution through professional R&D and precision manufacturing.
LTZC provides precision slewing bearings, precision robot bearing, customized bearing solutions, thin section bearing widely used in rotating equipment in the field of industrial automation.
LTZC specializes in manufacturing bearings of various sizes, LTZC specializes in developing marine-grade and defense-grade bearings designed to deliver exceptional strength, corrosion resistance, and long-term operational stability.
LTZC bearings are widely used in the aerospace field, LTZC is committed to providing high-precision, high-performance slewing bearing solutions for the aerospace and communications sectors.
LTZC offers high-performance slewing bearings, large diameter slewing bearings, wheel bearings, and slew ring solutions with competitive bearing prices and reliable manufacturing quality.
Feel free to get a quote on the latest price of slewing bearings for any largeapplications,
please include your application, needs, requirements and otherdetails.
WhatsApp
Eric.wang@ltzzc.com
0086-379-69950051
