Table 4 Clamping Coefficient Μsp For Steel Parts - Rohm Norm RN 1391 Informaciones Y Directivas Generales Para El Empleo De Instalaciones De Sujeción Accionadas Por Fuer

The clamping coefficient μsp accounts for the friction existing between the
clamping surface of the jaws and the workpiece in the zone of contact. It is in-
fluenced by
▪ the pattern of the clamping surfaces of the jaws
▪ the surface quality of the workpiece
▪ the material.
The clamping coefficient can be obtained from Table 4.
Forces are more efficiently transmitted by a tight fit than by edge or
saddle-type seats.
Workpiece surface
Smooth machine finish
ground
Rough to medium machine
finish
Unmachined
Corrections:
Table 4: Clamping coefficient μsp for steel parts
RN-1391
Reference Speed and Clamping Force Calculation |
Smooth Clamping surface of
jaws diamond
serration
0.07 0.12
0.10 0.20
0.15 0.30
Al, alloys = 0.95, Ms = 0.90, GG = 0.80
Serrated
0.20
0.35
0.45
45 / 138
2
EN