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We have prepared a webpage on "commonly used fits." We introduce tables of commonly used shaft basis fits and illustrations of commonly used shaft basis fits (for reference dimensions exceeding 10mm and up to 18mm). For more details, please refer to the related links. [Contents] ■ Table of commonly used hole basis fits ■ Illustration of commonly used hole basis fits ■ Table of commonly used shaft basis fits ■ Illustration of commonly used shaft basis fits *For more information, please download the PDF or feel free to contact us.

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Introducing the "Fit Tolerance Table (Excerpt from JIS B 0401-1:2016/JIS B 0401-2:2016)." JIS B 0401-1 specifies the ISO codes for size tolerances used for dimensions related to the geometric characteristics of products/basics of fits, concerning the lengths of shapes (cylindrical and opposing parallel planes). JIS B 0401-2 specifies the tolerance values for the tolerance classes commonly used for holes and shafts, calculated from the tables defined in JIS B 0401-1. For more details, please refer to the related links. [Contents] ■ Hole Dimension Tolerance Table (Dimensional Tolerances) [Excerpt from JIS B 0401] ■ Shaft Dimension Tolerance Table (Dimensional Tolerances) [Excerpt from JIS B 0401] *For more details, please download the PDF or feel free to contact us.

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We have prepared a web page for the "SI Units List and Conversion Table (International System of Units)." We introduce conversion rate tables for main SI units such as work, energy, heat, power (work rate, horsepower), heat flow, kinematic viscosity, and thermal conductivity. For more details, please refer to the related links. [Contents] ■ SI Base Units ■ Consistent SI Derived Units represented by unique names and symbols ■ SI Prefixes ■ Conversion rate tables for main SI units *For more information, please download the PDF or feel free to contact us.

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Here is an introduction to the "List of Formulas for Calculating Moment of Inertia (Inertia) J." The moment of inertia is fundamentally based on the formula that represents the product of the mass M [kg] of a rotating body and the square of its radius R [m]. It also explains the necessity of the moment of inertia and the differences between the International System of Units and the imperial unit system. For more details, please refer to the related links. 【Formulas (Excerpt)】 ■ Formula for the moment of inertia of a rotating rod ■ Formula for the moment of inertia of a rod when the rotation center is offset ■ Formula for the moment of inertia of a winding mechanism ■ Formula for the moment of inertia when a counterbalance is present ■ Formula for the moment of inertia of a rectangular prism *For more details, please download the PDF or feel free to contact us.

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Introducing the "Moment of Inertia J Quick Reference Table." This table provides the moment of inertia J [kg·m²] for a circular disk made of steel (specific gravity 7.85) with a thickness of 10mm and a diameter of Dmm. The values are listed vertically for every 10mm, while the horizontal values represent increments of 1mm. For disks with a thickness other than 10mm, you can obtain the moment of inertia by multiplying the values in the table by the thickness Lmm divided by 10mm. For more details, please refer to the related links. *For more information, please download the PDF or feel free to contact us.*

• Belts and pulleys

Here is an introduction to the "Load Torque Calculation Formula." The values of each friction coefficient μ vary depending on the machining accuracy and lubrication conditions of the machine, so please be careful when calculating the load torque. For more details, please refer to the related links. 【Load Torque Calculation Formula】 ■ Torque when external force is applied to a rotating body: T ■ Torque due to frictional force and external force of the feed screw: T ■ Torque due to frictional force and external force of the rack and pinion: T ■ Torque due to frictional force and external force of the belt conveyor: T ■ Motor shaft equivalent torque: To *For more details, please download the PDF or feel free to contact us.

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We have prepared a webpage titled "Hardness Conversion Table for Steel Rockwell C - Overview." It introduces Brinell hardness (HB) with a 10mm ball load of 3000 kgf, as well as Rockwell superficial hardness with a diamond cone indenter. For more details, please refer to the related links. [Items Listed (Excerpt)] ■ Rockwell C Scale Hardness (HRC) ■ Vickers Hardness (HV) ■ Rockwell Hardness ■ Shore Hardness (HS) ■ Rockwell C Scale Hardness Standard Ball (HRC) *For more information, please download the PDF or feel free to contact us.

• Belts and pulleys