Because of using hefty steel tubes for the columns and the robust dimensioning of all components the deflection, even under high drilling pressure, stays slight.
 The quill drillings are honed in micrometer range The spindles up from installation size 15/18 are embedded in ball casters. The quills are secured against contortions due to self-adjusting channels.
Large, dynamically balanced v-belt pulleys guarantee a secure power transmission even in the lower rotation speeds and a calmer run.
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