help] (Dremel 4000) I need to replace this bearing(B) but can't

Disassemble/repair Dremel 4000.

CRAFTSMAN Cutout Tool 1-speed Cordless 20-volt Max Routing Rotary Tool in the Rotary Tools department at

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My dremel keeps loosening while I use it. I've tried multi-chucks, bit adapters, etc., and it keeps losing my bits mid-carve. : r/stonecarving

Dremel 4000 Bearing Assembly Replacement - iFixit Repair Guide

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Dremel 4000 Bearing Assembly Replacement - iFixit Repair Guide

VXM Bike Bicycle Headset Bearing Bowl Cup BB Bottom Bracket Press In Install Removal Tool Repair Tools Set - AliExpress

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Disassemble/repair Dremel 4000.

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Dremel 4000 Bearing Assembly Replacement - iFixit Repair Guide