(2) The particle size of the dust. Dust particle size refers to the size of the dust particle size. In general, the smaller the dust particles, the greater the harm to people.
(3) Dispersion of dust. The degree of dust dispersion refers to the percentage of dust particles of various grain sizes in the overall composition of the dust. In the dust composition, the larger the percentage of dust particles smaller than 5um, the greater the harm to humans.
(4) The concentration of dust. The concentration of dust refers to the amount of floating dust contained in a unit volume of air. The higher the dust concentration, the greater the harm to the human body.
(5) Adsorption of dust. The adsorption capacity of dust is closely related to the surface area of ​​dust particles. The larger the dispersion, the larger the surface area and the enhanced adsorption capacity. The main indicators are hygroscopicity and toxicity.
(6) The chargeability of dust. Dust particles can carry electric charge. The source is that coal rock is charged by friction during pulverization, or it is charged by collision with ions in the air. The amount of dust particles depends on the size of the dust particles and is related to temperature and humidity. When the amount of electricity is increased, the amount of charge is reduced when the humidity is increased.
(7) Combustion and explosiveness of coal dust. When coal dust reaches a certain concentration in the air, it can be burned and exploded under the ignition of an open flame.
Precision Plus Ground and Whirled Ball Screw Assemblies are the highest precision product available, with standard lead accuracies of ±6µm/300mm. These ball screw assemblies feature a FL-Style ball nut, precisely preloaded to customer specifications. This unique nut design provides high repeatability and high stiffness for the most demanding ball screw applications. Each nut comes standard with awiper to protect against chips and Other debris.
Miniature Metric Precision Ball Screws are an efficient and cost-effective solution in a small envelope, ideal for use in small spaces. Ball screw assemblies range from 4 to 14mm in diameter with leads from 1 to 20mm - all with standard lead accuracies of ±52µm/300mm. Miniature Rolled Ball Screws are ideal for laboratory, semiconductor, and medical applications.
Diameter
Pitch
Cycle mode
Nut Type
R/L thread
Raw Material
Surface Finishing
End Shaft Journal
4
1
I
F
R/L thread
S1
S2
S3
S4
G
CR
WS
MS
BR
BL
K
R thread
5
1
I
F
R/L thread
6
1
I
F
R/L thread
A
R/L thread
S
R thread
K
F
R thread
2
I
F
R/L thread
A
R/L thread
6
E
F
R thread
8
1
I
F
R/L thread
A
R thread
S
R thread
C
R/L thread
K
F
R/L thread
2
I
F
R/L thread
A
R thread
S
R/L thread
K
F
R/L thread
2.5
I
F
R thread
A
R thread
4
U
F
R thread
P
F
R/L thread
5
P
F
R/L thread
8
P
F
R thread
E
F
R/L thread
10
2
I
F
R/L thread
A
R/L thread
K
F
R/L thread
3
I
F
R/L thread
4
I
F
R/L thread
A
R thread
W
F
R thread
10
E
F
R/L thread
12
1
I
F
R/L thread
2
I
F
R/L thread
A
R/L thread
3
I
F
R/L thread
4
I
F
R/L thread
A
R thread
5
I
F
R thread
A
R thread
C
R thread
E
F
R/L thread
8
P
F
R thread
10
W
F
R/L thread
14
2
I
F
R/L thread
3
I
F
R/L thread
4
I
F
R/L thread
5
I
F
R/L thread
16
2
I
F
R/L thread
4
U
F
R/L thread
5
I
F
R/L thread
U
F
R/L thread
10
I
F
R/L thread
U
F
R/L thread
16
E
F
R thread
20
4
U
F
R/L thread
5
I
F
R/L thread
U
F
R/L thread
10
U
F
R/L thread
25
4
U
F
R/L thread
5
I
F
R/L thread
U
F
R/L thread
6
U
F
R/L thread
10
I
F
R/L thread
32Mm Ball Screw,Sfu1204 Ball Screw,Ground Ball Screws,Ground Miniature Ball Screw
SCREW TECHNOLOGY CO., LIMITED , https://www.screw-tech.com