Page 25 - Modular design for machine tools

Conversion Table

The research and engineering development into the modular design and
machine tool joint were first launched in Germany and the U.S.S.R., and then
prevailed across the whole industrial nations through the activities of the
United Kingdom. In addition, their history can be traced to the 1930s.
To respect the originality and priority of the materials to be referred
to, the numerical unit within each material is not converted to the
SI unit within this book, and thus the reader is requested to refer to the
following conversion table, if necessary.

Length
1 µin 0.0254 µm
Force
1 kgf 9.80665 N
1 tonf 9.8 kN
1 lb 4.448 N
1 (short) ton 2000 lb 907.18 kgf
1 (long) ton 2240 lb 1016.05 kgf

Pressure
2 4
1 kgf/cm 9.80665 10 Pa 0.098 MPa
2 2
1 (long)ton/in 157. 48 kgf/cm 15.4 MPa
2 2
1 lb/in 0.07 kgf/cm 7 kPa
Torque and Moment
1 kgf m 9.80665 N m
1 lb in 0.113 N m
Stiffness
1 kgf/mm 9.80665 N/mm
1 kgf/µm 9.80665 N/µm
1 lb/in 175.1 N/m

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