ISUTAMI BEARINGS
Standard Linear Bearing KB
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ISUTAMI BEARINGS

Standard Linear Bearing KB

Standard Linear Bearing KB
ISUTAMI KB standard linear bearing is also known as KB standard linear ball bearing or KB standard linear bushing bearing. KB is the code name for the metric series of linear bearings and it is applied in European markets, such as Germany and France.

KB European standard linear bearing, its bushing, and steel balls are made of high carbon bearing steel. The linear bushing is produced from a solid steel outer cylinder and incorporates an industrial strength resin retainer. The retaining ring, also called sealing ring, normally indicated by U or P, is made of NBR material. The ball retainer is mounted inside the linear bushing together with the steel balls and sealed with a seal ring from one side or both sides of the bushing.
Standard Linear Bearing KB
ISUTAMI KB standard linear bearing is also known as KB standard linear ball bearing or KB standard linear bushing bearing. KB is the code name for the metric series of linear bearings and it is applied in European markets, such as Germany and France.

KB European standard linear bearing, its bushing, and steel balls are made of high carbon bearing steel. The linear bushing is produced from a solid steel outer cylinder and incorporates an industrial strength resin retainer. The retaining ring, also called sealing ring, normally indicated by U or P, is made of NBR material. The ball retainer is mounted inside the linear bushing together with the steel balls and sealed with a seal ring from one side or both sides of the bushing.

Standard Linear Bearing KB Size Chart

Standard Linear Bearing KB

Bearing No. Number
of Ball
Rows
Mian Dimensions Eccen-
Tiricity
(MAX.)
Basic Load Rating Weight
(kg)
Inscribed
Circle
Diameter
Outer
Diameter
Length Outer Locking
Groove
W h h1 θ DYNAMIC
Cr(kgf)
STATIC
Co(kgf)
dr Tolerance D Tolerance L Tolerance B Tolerance D1
KB3 4 3 +0.008
0
7 0
-0.008
10 0
-0.12
0.010 7 11
KB4 4 4 8 12 9 13
KB5 4 5 12 22 0
-0.20
14.5 0
-0.20
11.5 1.1 1 0.012 21 27 0.014
KB8 4 8 16 25 16.5 15.2 1.1 1 27 41 0.020
KB10 4 10 19 0
-0.009
29 22 18 1.3 1.5 6.8 80° 38 47 0.030
KB12 4 12 22 32 22.9 21 1.3 1.5 7.5 78° 52 79 0.040
KB16 5 16 +0.009
-0.001
26 36 24.9 24.9 1.3 1.5 10 78° 59 91 0.050
KB20 5 20 32 0
-0.011
45 31.5 30.3 1.6 2 10 60° 0.015 88 140 0.090
KB25 6 25 +0.011
-0.001
40 58 0
-0.30
44.1 0
-0.30
37.5 1.85 2 12.5 60° 100 160 0.207
KB30 6 30 47 68 52.1 44.5 1.85 2 12.5 50° 160 280 0.320
KB40 6 40 +0.013
-0.002
62 0
-0.013
80 60.6 59 2.15 3 16.8 50° 0.017 220 400 0.674
KB50 6 50 75 100 77.6 72 2.65 3 21 50° 390 810 1.170
KB60 6 60 90 0
-0.015
125 0
-0.40
101.7 0
-0.40
86.5 3.15 3 27.2 54° 0.020 480 1020 1.950
Remarks:Specifications for POM retainer, steel retainer, stainless steel type, oil-less series are the same

Standard Linear Bearing KB Features

The outer bushing surface of the KB standard linear bearing is completely closed, and has outer stop grooves for fixing the bearing. KB European series standard linear bearings supplied by ISUTAMI:
The number of ball rows varies according to bearing size changes, ranging from 4 to 6 columns;
The inner diameter (dr) range is 3-60mm, and the inner diameter tolerance range varies with the inner diameter. It is mainly divided into 0~+0.008mm, -0.001~+0.009mm, -0.001~+0.011mm, -0.002~+0.013mm;
The outer diameter (D) range is 7-90mm, and the outer diameter tolerance range varies with the outer diameter, which is mainly divided into -0.008~0mm, -0.009~0mm, -0.011~0mm, -0.013~0mm, -0.015~ 0mm;
The length (L) range is 10-125mm, and the length tolerance range varies with length. It is mainly divided into four intervals of -0.12~0mm, -0.2~0mm, -0.3~0mm, -0.4~0mm;
The maximum radial eccentricity is divided into five grades of 0.01mm, 0.012mm, 0.015mm, 0.017mm and 0.02mm according to the bearing size;
The basic dynamic load rating (C) ranges from 7 to 480 kgf (basic rated life is 50 km);
The basic static load rating (Co) ranges from 11 to 1020 kgf (basic rated life is 50 km);
KB standard linear bearings are generally installed in KBA standard linear bearing pillow blocks, KBA-S short linear bearing pillow blocks, KBA-L long linear bearing pillow blocks, KBB standard linear bearing pillow blocks and KBSB standard linear bearing pillow blocks, with the linear shaft. It can be interchangeable with SKB super standard linear bearings.

Different from the plastic linear bearing, the movement principle of the metal KB standard linear bearing is rolling friction. The steel balls contact the bushing and the cylindrical shaft , and rotates with a very small frictional resistance, so that high precision can be obtained. The KB linear bushing bearing is suitable for low loads with high-speed linear motion. In addition, please note the linear bearing structure features cannot be rotated.

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