Open Type Linear Ball Bearing
Our open type linear bearing is similar to the standard type in structure, including the outer race, steel ball, cage, and end ring.
Among these structural components, the cage allows the steel balls to be constrained in the circuit, while the end ring enables
the cage to be fixed in the outer ring. However, the open type is cut off a group of circuit on the basis of the standard type.
This allows easy connection to the guide rail and brings convenience for use in some special machinery. The open type
linear bearing is divided into three series, LM-OP, LME-OP, and LMB-OP. They are manufactured respectively in accordance
with the standards in Asia, Europe and the Americas, so as to adapt to use in different regions. Due to various models with different dimensions, the user has lots of choices.
The LM-OP open linear motion bearing with special open design and metric size is suitable for machines in Asian and
other areas. It can be divided into a variety of products according to different nominal shaft diameter, which is controlled
within the range between 10mm and 150mm. These products also vary from 29mm to 240mm in length, coming with very
small length tolerance. For example, an open linear motion bearing as long as 240mm comes with a length tolerance
value of only 400 μm. Due to the high matching degree, customers can directly purchase products depending on the required size.
Technical Parameters
| Nominal shaft dia. mm |
Resin retainer |
mm |
dr |
| Tolerance µm |
| Open type LM...UU-OP |
Ball circuit |
Weight (gf) |
Precision |
High |
| 10 |
LM10UU-OP |
3 |
23 |
10 |
0 -6 |
0 -9 |
| 12 |
LM12UU-OP |
3 |
25 |
12 |
| 13 |
LM13UU-OP |
3 |
34 |
13 |
| 16 |
LM16UU-OP |
4 |
52 |
16 |
| 20 |
LM20UU-OP |
4 |
69 |
20 |
0 -7 |
0 -10 |
| 25 |
LM25UU-OP |
5 |
188 |
25 |
| 30 |
LM30UU-OP |
5 |
210 |
30 |
| 35 |
LM35UU-OP |
5 |
335 |
35 |
0 -8 |
0 -12 |
| 40 |
LM40UU-OP |
5 |
500 |
40 |
| 50 |
LM50UU-OP |
5 |
1340 |
50 |
| 60 |
LM60UU-OP |
5 |
1610 |
60 |
0 -9 |
0 -15 |
| 80 |
LM80UU-OP |
5 |
3650 |
80 |
| 100 |
LM100UU-OP |
5 |
7200 |
100 |
0 -10 |
0 -20 |
| 120 |
LM120UU-OP |
6 |
11600 |
120 |
| 150 |
LM150UU-OP |
6 |
15700 |
150 |
0 -13 |
0 -25 |
| Major dimensions and tolerance(T) |
Eccentricity µM |
Radial clearance (max) µm |
Basic load rating |
| mm |
D |
mm |
L |
mm |
B |
W mm |
D1 mm |
h mm |
h1 mm |
θ |
| T μm |
T μm |
T μm |
Precision |
High |
Dynamic C N |
Static Co N |
| 19 |
0 -13 |
29 |
0 -200 |
22 |
0 -200 |
1.3 |
18 |
1 |
6.8 |
80° |
8 |
12 |
-4 |
372 |
549 |
| 21 |
30 |
23 |
1.3 |
20 |
1.5 |
8 |
80° |
510 |
784 |
| 23 |
32 |
23 |
1.3 |
22 |
1.5 |
9 |
80° |
510 |
784 |
| 28 |
37 |
26.5 |
1.6 |
27 |
1.5 |
11 |
80° |
-6 |
774 |
1,180 |
| 32 |
0 -16 |
42 |
30.5 |
1.6 |
30.5 |
1.5 |
11 |
60° |
10 |
15 |
882 |
1,370 |
| 40 |
59 |
0 -300 |
41 |
0 -300 |
1.85 |
38 |
2 |
12 |
50° |
980 |
1,570 |
| 45 |
64 |
44.5 |
1.85 |
43 |
2.5 |
15 |
50° |
-8 |
1,570 |
2,740 |
| 52 |
0 -19 |
70 |
49.5 |
2.1 |
49 |
2.5 |
17 |
50° |
12 |
20 |
1,670 |
3,140 |
| 60 |
80 |
60.5 |
2.1 |
57 |
3 |
20 |
50° |
-10 |
2,160 |
4,020 |
| 80 |
100 |
74 |
2.6 |
76.5 |
3 |
25 |
50° |
-13 |
3,820 |
7,940 |
| 90 |
0 -22 |
110 |
85 |
3.15 |
86.5 |
3 |
30 |
50° |
17 |
25 |
4,700 |
10,000 |
| 120 |
140 |
0 -400 |
105.5 |
0 -400 |
4.15 |
116 |
3 |
40 |
50° |
-20 |
7,350 |
16,000 |
| 150 |
0 -25 |
175 |
125.5 |
4.15 |
145 |
3 |
50 |
50° |
20 |
30 |
14,100 |
34,800 |
| 180 |
200 |
158.6 |
4.15 |
175 |
3 |
85 |
80° |
-25 |
16,400 |
40,000 |
| 210 |
0 -29 |
240 |
170.6 |
5.15 |
204 |
3 |
105 |
80° |
25 |
40 |
21,100 |
54,300 |
The dimensions of LME-OP open linear bearing adopt the units in metric system. As the sizes and the tolerances of bore
diameter are in line with the European standards, the product is commonly used in the European machines.
This series of products can be applied to the shaft with a nominal diameter of 10mm, 12mm, 25mm, 60mm, etc.,
as well as has a variety of length, weight, and tolerance values. Hence, the user can rest assured purchase the
open linear bearing of appropriate sizes, and applied it to the machinery of different requirements.
Technical Parameters
| Nominal shaft dia. mm |
Resin retainer |
mm |
dr |
| Tolerance µm |
| Open type LME...UU-OP |
Ball circuit |
Weight (gf) |
Precision |
High |
| 10 |
LME10UU-OP |
3 |
23 |
10 |
- |
+8 0 |
| 12 |
LME12UU-OP |
3 |
32 |
12 |
| 16 |
LME16UU-OP |
4 |
44 |
16 |
- |
+9 -1 |
| 20 |
LME20UU-OP |
4 |
75 |
20 |
| 25 |
LME25UU-OP |
5 |
181 |
25 |
- |
+11 -1 |
| 30 |
LME30UU-OP |
5 |
272 |
30 |
| 40 |
LME40UU-OP |
5 |
600 |
40 |
- |
+13 -2 |
| 50 |
LME50UU-OP |
5 |
970 |
50 |
| 60 |
LME60UU-OP |
5 |
1580 |
60 |
| Major dimensions and tolerance(T) |
Eccentricity µM |
Radial clearance (max) µm |
Basic load rating |
| mm |
D |
mm |
L |
mm |
B |
W mm |
D1 mm |
h mm |
h1mm |
θ |
| T μm |
T μm |
T μm |
Dynamic C N |
Static Co N |
| 19 |
0 -9 |
29 |
0 -200 |
22 |
0 -200 |
1.3 |
18 |
1 |
6.8 |
80º |
12 |
-4 |
372 |
549 |
| 22 |
32 |
22.9 |
1.3 |
21 |
1.5 |
7.5 |
78º |
510 |
784 |
| 26 |
36 |
24.9 |
1.3 |
24.9 |
1.5 |
10 |
78º |
578 |
892 |
| 32 |
0 -11 |
45 |
31.5 |
1.6 |
30.3 |
2 |
10 |
60º |
15 |
-6 |
862 |
1370 |
| 40 |
58 |
0 -300 |
44.1 |
0 -300 |
1.85 |
37.5 |
2 |
12.5 |
60º |
980 |
1570 |
| 47 |
68 |
52.1 |
1.85 |
44.5 |
2 |
12.5 |
50º |
-8 |
1570 |
2,740 |
| 62 |
0 -13 |
80 |
60.6 |
2.15 |
59 |
3 |
16.8 |
50º |
17 |
2160 |
4,020 |
| 75 |
100 |
77.6 |
2.65 |
72 |
3 |
21 |
50º |
-13 |
3820 |
7,940 |
| 90 |
0 -15 |
125 |
0 -400 |
101.7 |
0 -400 |
3.15 |
86.5 |
3 |
27.2 |
54º |
20 |
4,700 |
9,800 |
The load capacity of LMB-OP open linear bushing has been greatly improved compared to other standard products,
so that it is applicable to a wide range of machines. This product is applicable to different nominal shaft diameters,
ranging from 1/2 inch to 2 inch. For example, the 2 inch type comes with a length of 4 inch and a weight of 980gf.
In addition, it is provided with five rows of steel balls to ensure adequate carrying capacity, thus prolonging the
service life of the machine. This series of open linear bearing adopts inch size, and is popular in the Americas region.
Technical Parameters
| Nominal shaft dia. inch mm |
Resin retainer |
inch mm |
dr |
Eccentricity inch/µm |
Radial clearance (max) inch/µm |
Basic load rating |
| Tolerance inch/µ m |
| Open type LMB...UU-AJ |
Ball circuit |
Weight (gf) |
Precision |
High |
Precision |
High |
Dynamic C N |
Static Co N |
| 1/2 12.700 |
LMB8UU_OP |
3 |
28 |
0.5000 12.700 |
0-0.00025 0 -6 |
0 -0.00040 0 -9 |
0.0003 8 |
0.0005 12 |
-0.0001 -4 |
510 |
784 |
| 5/8 15.875 |
LMB10UU_OP |
3 |
57 |
0.6250 15.875 |
774 |
1,180 |
| 3/4 19.050 |
LMB12UU_OP |
4 |
76 |
0.7500 19.050 |
0 -0.00030 0 -7 |
0 -0.00040 0 -10 |
0.0004 10 |
0.0006 15 |
-0.0002 -6 |
862 |
1,370 |
| 1 25.400 |
LMB16UU_OP |
5 |
170 |
1.0000 25.400 |
980 |
1,570 |
| 1-1/4 31.750 |
LMB20UU_OP |
5 |
370 |
1.2500 31.750 |
0 -0.00035 0 -8 |
0 -0.00050 0 -12 |
0.0005 12 |
0.0008 20 |
-0.0003 -8 |
1,570 |
2,740 |
| 1-1/2 38.100 |
LMB24UU_OP |
5 |
570 |
1.5000 38.100 |
2,180 |
4,020 |
| 2 50.800 |
LMB32UU_OP |
5 |
980 |
2.0000 50.800 |
0.0007 17 |
0.0010 25 |
-0.0005 -13 |
3,820 |
7,940 |
| Major dimensions and tolerance(T) |
| inch mm |
D |
inch mm |
L |
inch mm |
B |
W inch mm |
D1 inch mm |
h inch mm |
h1 inch mm |
θ |
| T inch μm |
T inch μm |
T inch μm |
| 0.8750 22.225 |
0 -0.00050 0 -13 |
1.2500 31.750 |
0 -200 |
.9625 24.46 |
0 -200 |
0.0459 1.168 |
0.8209 20.853 |
0.06 1.5 |
0.34 7.9375 |
80° |
| 1.1250 28.575 |
1.5000 38.100 |
1.1039 28.04 |
0.0559 1.422 |
1.0590 26.899 |
0.06 1.5 |
0.375 9.525 |
80° |
| 1.2500 31.750 |
0 -0.00065 0 -16 |
1.6250 41.275 |
1.1657 29.61 |
0.0559 1.422 |
1.1760 29.870 |
0.06 1.5 |
0.4375 11.1125 |
60° |
| 1.5625 39.688 |
2.2500 57.150 |
0 -0.012 |
1.7547 44.57 |
0 -0.012 |
0.0679 1.727 |
1.4687 37.306 |
0.06 1.5 |
0.5625 14.2875 |
50° |
| 2.0000 50.800 |
0 -0.00075 0 -19 |
2.6250 66.675 |
2.0047 50.92 |
0.0679 1.727 |
1.8859 47.904 |
0.10 2.5 |
0.625 15.875 |
50° |
| 2.3750 60.325 |
3.0000 76.200 |
0 -300 |
2.4118 61.26 |
0 -300 |
0.0859 2.184 |
2.2389 56.870 |
0.12 3 |
0.75 19.05 |
50° |
| 3.0000 76.200 |
0 -0.00090 0 -22 |
4.0000 101.600 |
3.1917 81.07 |
0.1029 2.616 |
2.8379 72.085 |
0.12 3 |
1.0 25.40 |
50 |
As a professional standard linear bearing manufacturer and supplier in China, we also offer adjustable type linear bearing, round flange mount linear bearing, SC-UU slide block, SHF horizontal shaft support, and much more.
The LM-UU linear motion bearing is manufactured in line with Asia's mechanical standards, so that it is suitable for use in Asia. The products we offer include many models with the applicable shaft nominal diameter ranging from 3mm to 150mm. They differ in the main dimensions and tolerances, the degree of eccentricity, the maximum radial clearance, and the rated load. Therefore, this linear bearing for Asia market can be used in different sizes and models of machinery, serving to reduce friction and extend life of the equipment.
Our workroom of linear ball bearing at a glance:
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Wide Application of our Linear ball bearingfor example:
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