KP-55 Steel Ball 520K05
The Steel Ball #520K05 is an OEM replacement component designed for use with the KUPA KP-series handpieces (including the KP-55, KP-55A, KP-60, KP-60A and compatible models such as the Medicool 20K/35K) as listed in the parts catalogue.
This ball (outside diameter ~2.30 mm) is built for high-speed, high-precision applications inside the handpiece assembly. It typically serves a role (such as a cam ball or rotor/shaft contact point) where smooth, hardened metal contact is required for reliable, vibration-free rotation.
Features
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Smooth performance: Installing fresh steel balls in the appropriate assembly maintains smooth, consistent operation of the handpiece, reducing wobble and vibration.
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Prolongs machine life: A small but critical part—wearing steel balls can lead to premature wear of adjacent parts (cams, bearings), so replacing them helps avoid broader damage.
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Cost-effective maintenance: Rather than replacing larger assemblies, swapping out steel balls is a low-cost service item that delivers tangible improvement.
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OEM fit & reliability: Using the exact part number (#520K05) ensures correct sizing and material, which helps retain the handpiece’s design performance.
Installation Tips
Confirm your handpiece model and internal revision—if it’s a variant, verify that 2.30 mm OD balls are used.
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When servicing, confirm the ball seating area is clean, free of debris/metal shavings, and that mating surfaces (cams, races) are in good condition; otherwise the new ball may not perform optimally.
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Power off and unplug the handpiece.
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Disassemble to access the component area (e.g., cam or rotor assembly) that uses the steel ball.
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Remove the old ball(s), clean the seating area thoroughly.
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Insert the new steel ball(s) from the pack, ensure proper seating and alignment with adjacent components.
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Re-assemble the handpiece and run it unloaded (no bit) at low speed to ensure smooth rotation and correct operation before full use.