Question about Milwaukee 5321-21 Rotary Hammer

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When drilling the clutch starts to slip

Hammer drill 5321-21

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  • David Ford
    David Ford May 11, 2010

    When you say starting to slip are you jamming the bit? This tool has an internal clutch that is preset to slip when the bit binds up to protect the user. If it does it all the time you would need to send it in for service. This is not a repair that can be done at home.

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  • 2,176 Answers

If it slips to easily that is a problem, but it is designed to slip some when the bit binds up in the concrete. If you feel it is too easy, I would not recommend trying to service at home. I used to work on them and they are a pain, the clutch is an assembly and I would recommend taking to an authorized service station so they can check the static slip on the clutch mechanism and then advise whether needs serviced or acceptable.

Posted on Nov 05, 2009

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