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#001 Pictorial and Explanations on LCA Standard Components : How to Select Standard Components

Category : Automation elements technology
July13, 2009

MISUMI's FA Mechanical catalog contains many components with similar appearances. However, they differ in design specifications such as material, surface treatments, dimensional tolerances and shaft-end configurations.

= Example: Case of [1] Shafts, [2] Rotary shafts, [3] Rods, and [4] Posts / Stands =
Explanation

our groups above have the similar appearances but with different functions

[1] Shafts and [2] Rotary shafts are motion mechanism components as moving parts.
[3] Rods and [4] Posts / Stands are structural components as non-moving parts.
For the motion mechanism components, material and surface treatments can be specified for durability, and tolerances for dimensional accuracy can be specified.

[Comparison table of four product groups]
Product nameMaterial
[JIS]
[ANSI]
[EN]
HardnessSurface treatmentO.D. tolerance and accuracy
Shafts
One end male thread type
equivalent

[S45C]
[1045 Steel]
[1.1191 / C45E
(Ck45)]


[SUS304]
[304 Stainless
Steel]

[1.4301 /
X5CrNi18-10]

58HRC〜
56HRC〜
(Induction hardening)
Hard Cr plating(HV750〜) Shaft O.D.: g6, f8 Circularity, Straightness, Verticalness, Concentricity can be Specified
Rotary shafts One end male thread type [S45C]
[1045 Steel]
[1.1191 /
C45E (Ck45)]


[SUS304]
[304 Stainless
Steel]

[1.4301 /
X5CrNi18-10]


[SCM435]
[4137 Alloy
Steel]

[1.7220 /
34CrMo4]
-Black oxide Electroless nickel plating Shaft O.D.: g6 Circularity, Straightness, Verticalness, Concentricity can be Specified
Thick-wall ground stainless steel pipe, male thread type [SUS304]
[304 Stainless
Steel]

[1.4301 /
X5CrNi18-10]

--Pipe O.D.: h8
Round posts One end male thread type [SS400]
[1018 Steel
Equivalent]

[1.0040 /
Ust.42.2]


[SUS304]
[304 Stainless
Steel]

[1.4301 /
X5CrNi18-10]
-Black oxide Electroless nickel plating Shaft O.D. : 0 -0.1

[Pic.1][Pic.2]

Organizing LCA mechanisms

The LCA is comprised of the following configuration, and this establishes the reference for the components' functionality.

LCA = Mechanism + Actuator + Controller

images

Structural member is: Non-moving mechanical elements that support the entire mechanism. Drive mechanism is: Moving mechanical elements.
In order to make proper product selections from the catalog, it is important to understand the specific characteristics of the listed components. We will explain the characteristics of the standard components using visual information such as photos and pictorials, hereafter. Usage examples of shafts will be explained with pictorials next.

MISUMI USA eCatalog