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Dremel 4000 Bearing Assembly Replacement

Introduction

If bearings are worn or if fan is damaged, the replacement of the entire bearing assembly is required. After opening the case, the bearing assembly can be lifted out by hand.

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  1. Dremel 4000 Bearing Assembly Replacement, Back Case: étape 1, image 1 de 2 Dremel 4000 Bearing Assembly Replacement, Back Case: étape 1, image 2 de 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.

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  2. Dremel 4000 Bearing Assembly Replacement: étape 2, image 1 de 1

    • Using your hands, carefully remove hanger from casing.

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  3. Dremel 4000 Bearing Assembly Replacement: étape 3, image 1 de 2 Dremel 4000 Bearing Assembly Replacement: étape 3, image 2 de 2

    • Remove the brush caps (one on each side) by using a flathead screwdriver bit.

    • The brush caps are spring loaded.

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  4. Dremel 4000 Bearing Assembly Replacement: étape 4, image 1 de 1

    • Using the Torx 15 screwdriver tip, remove the 5 screws (12.5 mm) that hold the casing together.

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  6. Dremel 4000 Bearing Assembly Replacement: étape 5, image 1 de 1

    • Use a plastic opening tool to gently wedge apart the hard plastic threads.

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  7. Dremel 4000 Bearing Assembly Replacement: étape 6, image 1 de 1

    • Use your hands to carefully remove the back casing so that none of the components fall out.

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  8. Dremel 4000 Bearing Assembly Replacement, Power Cord: étape 7, image 1 de 2 Dremel 4000 Bearing Assembly Replacement, Power Cord: étape 7, image 2 de 2

    • To clear access to the electrical assembly, remove the variable speed dial cap and blue power lever, and set them aside.

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  9. Dremel 4000 Bearing Assembly Replacement: étape 8, image 1 de 1

    • Using your fingers, carefully pull the circuit board from the casing. This will make it easier to remove the power cord.

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  10. Dremel 4000 Bearing Assembly Replacement: étape 9, image 1 de 1

    • Each wire is fed through a small opening on the circuit board and held with a flat head screw.

    • Loosen the screw just enough to remove the wire by gently pulling it with your hand.

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  11. Dremel 4000 Bearing Assembly Replacement: étape 10, image 1 de 1

    • Carefully remove both wires from circuit board with your hands.

    • Take careful note of which side has the black wire and which has the white wire.

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  12. Dremel 4000 Bearing Assembly Replacement, Bearing Assembly: étape 11, image 1 de 2 Dremel 4000 Bearing Assembly Replacement, Bearing Assembly: étape 11, image 2 de 2

    • Carefully pull up on the shaft to lift out of the casing.

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  13. Dremel 4000 Bearing Assembly Replacement: étape 12, image 1 de 2 Dremel 4000 Bearing Assembly Replacement: étape 12, image 2 de 2

    • Firmly hold the field assembly in one hand and the bearing assembly in the other.

    • Carefully slide the bearing assemble out of the field assembly.

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Conclusion

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

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Eugene

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USF Tampa, Team 15-4, Remmell Spring 2016 Membre de l'équipe USF Tampa, Team 15-4, Remmell Spring 2016

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5 commentaires

Nice guide. FYI, I've found that removing the rotor/bearing assembly is just as easy without removing the input power wires.

Chris Barth - Réponse

Absolutely, it is.

josephbolton -

yeah why did we do that?

Junk McNuggets (Junk; Justin) -

thats an abrupt end for someone trying to learn all of this the first time. which one of those is the field assembly and which is the bearing assembly? my guess is the bearing assembly is the cylinder looking thing on the right...

and then what? it just says do it all backwards to put it together again...? whyd we take it apart for? mines whistling or squealing or just going "EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE..." when i turn it on. just started today too. am i supposed to just, like, smack this can shaped part on the table and then cram it all back into its plastic case?

i mean, that works when the kids are acting up so im gonna give it a try.,..

Junk McNuggets (Junk; Justin) - Réponse

Disassembly is shown, but main action of removing ball bearings from the shaft of the armature - vital essential sequence of removing - how to remove the collate pipe from the armature shaft, then how to pull out, ball bearings from the armature shaft is not shown. That is the most important procedure. No one wants to replace the whole armature and ball bearing assembly, at unnecessary high cost when the armature is okay. Please show how to remove ball bearings and replace them on the existing working armature.

Dileep Ghatge - Réponse

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