Ball screws and screw nuts View larger

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Ball screws and screw nuts

Properties
• We provide various rolled ball screw sets: ranging from Ø 6 to Ø 80 mm, in quality C7, with various pitches, as right-hand and some left-hand threads, in lengths up to 3000 mm
• Standard products are Ø 12 to Ø 40 mm, right-hand thread, nuts with double-sided flange cut and preload of P0
• Material: steel 50CrMo5QT, surface hardened 58-62HRC, hardening depth 2 mm from thread root
• In the following overview, the preferred types which are mostly available from stock are marked in red
• Higher preloads, ground screws, round nut flanges, etc. are available on request
• A higher preload of the nut enables a more precise positioning but leads to less efficiency
• Ball screw sets with preload P1 to P4 are delivered only in their assembled state. For preload P0, we deliver the screw and nut separately.
• End machining for fixed and floating bearings made according to your drawings are available on request. For examples, refer to pages V 061 and V 062
• Note that screws can buckle when installed vertically and placed under pressure or lifting loads
• Take the screw torsion into account when operating at high turning speeds

Advantages
• Rolling friction in the thread – thus very high efficiency
• Suitable for high speeds
• High positioning accuracy
• Lubrication required – usually nuts with lubrication hole
• No self-locking! Vertical ball screw sets must be mounted with brake motors

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Applications
• Transmission of rotational to linear motions
• Very precise positioning in conjunction with preload of P1 to P4
• Drives for fast linear units and screw jacks
• Well suited for usage combined with servo and stepper motors
• Replacement for pneumatic drives