Operation manual for linear units type LK
DS-ENGLISH-SCHUB-LK-V1.00-2020.03.23
SEC-DS-ENGLISH-SCHUB-LK-V1.00-2020.03.23
Operation manual for linear units type LK
1 General
Type LK linear units are offered in different variants, see Table 1. These are mounted together with electric
open/close or modulating actuators, of the series CM, on valves which require a linear positioning movement.
These linear units convert the torque output from the actuator into an axial force through a ball screw drive.
Not only is a higher control accuracy allowed, but also a longer lifetime is provided with the use of a ball screw
drive. The combination of actuator and linear unit, is based on the required thrust and the necessary stroke.
Type Actuator
Output
flange
Stroke
Output
thread
Pitch Factor (
Nm
kN
) Weight [kg]
LK50 CM03 G0/F10 50mm M20x1,5 5mm/rev 1,06 12,3
LK100 CM03 G0/F10 100mm M20x1,5 5mm/rev 1,06 15,0
LK120 CM06 G0/F10 120mm M20x1,5 5mm/rev 1,06 19,2
CM06 G
1
2
/F14 120mm M36x3,0 5mm/rev 1,06 23,6
Table 1: Technical data linear units
2 Structure
Figure 1 shows e.g. an CM03 actutator with mounted LK linear unit. The linear unit itself consists essentially of
a solid cast housing, a mounted spindle nut and a non-rotating spindle, see Figure 2. To prevent contamination
by dusty ambient air and to ensure the mechanical protection, the linear unit is completely sealed with O-rings
at the output.
Figure 1: CM03-Actuator with mounted LK100 linear unit
1
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