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THK Linear Ball Bushings（Motion：Linear/Rotary）

TYPE

Straight
Flange
Housings
Related Components
Standard Flange
Center Flange
Pilot Flange

2 items

: 30; 45; 60

Linear Ball Bushings - Linear/Rotating, single, with seals. Series ST-UU, ST-UUB.

THK

Hardened shaft, recommended for use with outer diameter tolerance (k5, m5, n5 or p5).

[Features]
· [Extremely low friction coefficient] Enables rotation with extremely low friction coefficient (=0.0006 to 0.0012) due to point contacts between the balls and ball rolling surface, and the separation of the balls within the ball cage.
· [Compact-design] Since the cross-sectional profile is simply the combination of the thin-walled outer cylinder and the balls, the outer diameter of this bearing is small and it is suitable for lightweight and space-saving compact designs.
· [High accuracy and low price] The sliding parts can be manufactured at low cost and a high level of accuracy is obtained.

Volume Discount

CAD ：

2D / 3D
Days to Ship: Same day or more

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Linear Ball Bushings - Linear/Rotating, single, no seals. ST, ST-B Series.

THK

Hardened shaft, recommended for use with outer diameter tolerance (k5, m5, n5 or p5).

[Features]
· In the ST type, the balls and ball cage are embedded in the inner side the of outer cylinder, which has been precision ground to ensure a cylindrical form
· The balls are arranged in a staggered form to that the load is equally distributed
· The ball cage is a machined cage made out of lightweight and highly rigid light alloy.
· A slide ring and retainer ring are provided on two sides of the internal diameter of the outer cylinder to prevent overrun of the ball cage.
· With this structure, it is possible to achieve rotating, linear and mixed action with a low friction coefficient.
· Stroke length can be up to double the range of movement of the ball cage within the outer cylinder
· Suitable for a wide range of applications where it is necessary to obtain high accuracy at a low price, including the ink roll parts of a printing machine, the work chuck of a punching press work, press feeders, the work head of an electric discharge machine, the correction device of a take-up roll, textile machines, strain measuring equipment, optical measuring device spindle, copiers, etc.
· Enables rotation with extremely low friction coefficient (=0.0006 to 0.0012) due to point contacts between the balls and ball rolling surface, and the separation of the balls within the ball cage.
· Since the cross-sectional profile is simply the combination of the thin-walled outer cylinder and the balls, the outer diameter of this bearing is small and it is suitable for lightweight and space-saving compact designs.

Volume Discount

CAD ：

2D / 3D
Days to Ship: Same day or more

Show Stock Products

Days to Ship:	Same day or more

Days to Ship:	Same day or more


Brand
Product Series
CAD
Days to Ship
TYPE
Motion
Style
Outer Cylinder Material
Outer Cylinder Surface Finish
For Shaft Size(mm)
For Shaft Size(inch)
Overall Length L(mm)
Overall Length L(inch)
Flange Type
Lubrication Type
O.D. D(mm)
O.D. D(inch)
Type
Length
Ball Recirculating Type
Precision
Eccentricity(µm)


Brand	THK	THK
Product Series	Linear Ball Bushings - Linear/Rotating, single, with seals. Series ST-UU, ST-UUB.	Linear Ball Bushings - Linear/Rotating, single, no seals. ST, ST-B Series.
CAD	2D / 3D	2D / 3D
Days to Ship	Same day or more Show Stock Products	Same day or more Show Stock Products
TYPE	Straight	Straight
Motion	Linear/Rotary	Linear/Rotary
Style	-	-
Outer Cylinder Material	-	-
Outer Cylinder Surface Finish	-	-
For Shaft Size(mm)	8 ～ 100	6 ～ 100
For Shaft Size(inch)	-	-
Overall Length L(mm)	24 ～ 100	19 ～ 100
Overall Length L(inch)	-	-
Flange Type	-	-
Lubrication Type	-	-
O.D. D(mm)	15 ～ 130	12 ～ 130
O.D. D(inch)	-	-
Type	Standard	Standard
Length	-	-
Ball Recirculating Type	-	-
Precision	-	-
Eccentricity(µm)	-	-

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Specification/Dimensions

Motion
- Linear Motion
- Linear/Rotary
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Style
- Standard
- Open
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Outer Cylinder Material
- Steel
- Stainless Steel
- Aluminum
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Outer Cylinder Surface Finish
- None
- Plated
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Metric / Inch
- metric
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For Shaft Size(mm)
3

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For Shaft Size(inch)
0.19 in (3/16")

0.25 in (1/4")

0.38 in (3/8")

0.50 in (1/2")

0.63 in (5/8")

0.75 in (3/4")

1.00 in (1")

1.25 in (1-1/4")

1.50 in (1-1/2")

2.00 in (2")

2.50 in (2-1/2")

3.00 in (3")

4.00 in (4")
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Overall Length L(mm)
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Drawing

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Overall Length L(inch)
0.56 in (9/16")

0.75 in (3/4")

0.750 in (3/4")

0.875 in (7/8")

1.19 in

1.25 in (1-1/4")

1.250 in (1-1/4")

1.31 in (1-5/16")

1.375 in (1-3/8")

1.50 in (1-1/2")

1.500 in (1-1/2")

1.594 in (1-19/32")

1.625 in (1-5/8")

1.69 in

1.75 in (1-3/4")

1.875 in (1-7/8")

1.94 in

2.06 in

2.25 in (2-1/4")

2.250 in (2-1/4")

2.375 in (2-3/8")

2.625 in (2-5/8")

2.81 in

2.813 in (2-13/16")

2.88 in

3.00 in (3")

3.000 in (3")

3.094 in (3-3/32")

3.20 in

3.38 in

3.50 in (3-1/2")

3.63 in (3-5/8")

3.75 in (3-3/4")

3.95 in

4.00 in (4")

4.281 in (4-9/32")

4.50 in (4-1/2")

4.75 in (4-3/4")

5.00 in (5")

5.000 in (5")

5.33 in

5.688 in (5-11/16")

6.00 in (6")

7.50 in (7-1/2")

8.00 in (8")

9.00 in (9")
Clear

Flange Type
- Standard Flange
- Center Flanged
- Pilot Flanged
Larger Image

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Lubrication Type
- Standard
- Grease coating
- With Lubrication Unit MX
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O.D. D(mm)
7

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Drawing

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O.D. D(inch)
0.375 in (3/8")

0.50 in (1/2")

0.5000 in (1/2")

0.625 in (5/8")

0.6250 in (5/8")

0.7500 in (3/4")

0.875 in (7/8")

0.8750 in (7/8")

1.125 in (1-1/8")

1.1250 in (1-1/8")

1.25 in (1-1/4")

1.2500 in (1-1/4")

1.56 in (1-9/16")

1.5625 in (1-9/16")

1.69 in

1.75 in (1-3/4")

2.00 in (2")

2.0000 in (2")

2.25 in (2-1/4")

2.375 in (2-3/8")

2.3750 in (2-3/8")

3.00 in (3")

3.62 in (3-5/8")

3.75 (3-3/4")

4.50 in (4-1/2")

6.00 in (6")
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Type
- Standard
- Open
- Clearance Adjustment Type
- with End Flange
- with Center Flange
- with Pilot, End Flange
- Housing Type
- Pillow Blocks Wide Block Type
- Shaft-Sliding Linear Bushing Pillow Blocks
- Related Components
Images

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Length
- Standard
- Short
- Medium
- Double
- Medium Long
- Long
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Ball Recirculating Type
- Single
- Double
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Precision
- High Grade
- Precision Grade
See the precision standard of each manufacturer.

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Eccentricity(µm)
4

8

10

12

12.7(0.5 µin)

15

15.24(0.6 µin)

17

20

20.32(0.8 µin)

25

25.4(1 µin)

30
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