The Dremel 4000 is a high-performance rotary tool known for its variable speed (5,000–35,000 RPM) and electronic feedback. Whether you are troubleshooting a malfunction, replacing a worn part, or reassembling the tool after cleaning, the parts diagram is your most essential resource. This write-up breaks down the key assemblies shown in the official Dremel 4000 parts schematic. 1. Housing & External Components The outer shell protects internal electronics and provides user control points.
| Part Number (Typical) | Component Name | Function | |----------------------|----------------|-----------| | 261000XXXX | Motor Housing (Left/Right Halves) | Clamshell design; encloses motor and fan. | | 261000XXXX | Nose Cap | Threads onto the front; holds the collet nut and collet. | | 261000XXXX | Ventilation Sleeve (Black band) | Covers air intake vents; reduces dust ingress. | | 261000XXXX | Shaft Lock Button | Press to lock the output shaft for accessory changes. | | 261000XXXX | Speed Dial (Variable speed) | 10-position dial for precise RPM control. | | 261000XXXX | On/Off Slide Switch | Mechanical slide switch with locking feature. | | 261000XXXX | Power Cord (with strain relief) | Provides AC power (120V or 230V depending on region). | These parts are revealed when you split the motor housing. They are the most common failure points. Dremel 4000 Parts Diagram