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Dremel 4000 Shaft Lock Pin Replacement

Dremel 4000 Shaft Lock Pin Replacement

John Cobb

John Cobb and 2 other contributors

Last updated on May 20, 2020

6 minutes
Very easy
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Introduction

Go to step 1

This is likely the simplest repair possible for this device. Simply access the shaft lock pin after opening the case.

What you need

Parts

Tools

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  1. Dremel 4000 Shaft Lock Pin Replacement, Back Case: step 1, image 1 of 2 Dremel 4000 Shaft Lock Pin Replacement, Back Case: step 1, image 2 of 2
    • Start by removing the housing cap by unscrewing it.

    • Next, unscrew the now exposed collet nut while holding down the shaft lock button.

    • To remove the collet nut, you may need to use the small open-end wrench provided with the Dremel.

  2. Dremel 4000 Shaft Lock Pin Replacement: step 2, image 1 of 1
    • Using your hands, carefully remove hanger from casing.

  3. Dremel 4000 Shaft Lock Pin Replacement: step 3, image 1 of 2 Dremel 4000 Shaft Lock Pin Replacement: step 3, image 2 of 2
    • Remove the brush caps (one on each side) by using a flathead screwdriver bit.

    • The brush caps are spring loaded.

  4. Dremel 4000 Shaft Lock Pin Replacement: step 4, image 1 of 1
    • Using the Torx 15 screwdriver tip, remove the 5 screws (12.5 mm) that hold the casing together.

  5. Dremel 4000 Shaft Lock Pin Replacement: step 5, image 1 of 1
    • Use a plastic opening tool to gently wedge apart the hard plastic threads.

  6. Dremel 4000 Shaft Lock Pin Replacement: step 6, image 1 of 1
    • Use your hands to carefully remove the back casing so that none of the components fall out.

  7. Dremel 4000 Shaft Lock Pin Replacement, Shaft Lock Pin: step 7, image 1 of 1
    • If the shaft lock pin is not engaging the rotary gear, or if the spring is missing or damaged, it will need to be replaced.

    • Remove the damaged shaft lock pin and spring by hand.

    • Place new shaft lock pin so that the spring functions and the lock engages the rotary gear.

Conclusion

To reassemble your device, follow these instructions in reverse order.

3 other people completed this guide.

John Cobb

Member since: 01/20/16

1,743 Reputation

4 Guides authored

Team

USF Tampa, Team 15-4, Remmell Spring 2016 Member of USF Tampa, Team 15-4, Remmell Spring 2016

USFT-REMMELL-S16S15G4

4 Members

13 Guides authored

3 Comments

These instructions are idiotic! I want to replace the shaft lock pin because it is not WORKING. Step 1 instructs me to use the shaft lock pin to remove the exposed collet nut. The reason I am changing the shaft lock pin is because it won’t hold the shaft for loosening the collet nut. DUH!

mitchthane - Reply

three years later and I came to the same conclusion: DUH

Randy Martin -

Four years later and I came to the same conclusion: DUH

Ben simon -

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