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How to Repair and Replace a Drill Press Chuck

November 15, 2018Olen Murriel

A chuck is a special clamp which is used to hold objects with the symmetrical cylinder Most of them have claws which are arranged symmetrically. They can be loosened by using chuck key.


  • Jawed chucks

They are subdivided into self —centering, drill chuck, independent —jaw and spiders.

  • Special direct system

They are found as SDS-plus, SDS —top, and SDS-max.

Chucks with both indexable positioning and clamping.


What causes chucks breakage?

Chucks are prone to break if it not properly maintained. Drills can break because of the following

  • Deflected breakage-This is caused by breakage at the end of the flute.
  • The twisted breakage-the drill bit gets broken at the center of the flute.


Causes of breakages.

  • Weak drill bit
    It is caused by a large deflection which causes breakage at the flute’s end.
  • The diameter of drill bits
    This leads to increase cutting resistance thus leading to breakage.
  • Poor drill chucking
    Dust in spindle chuck, scratching and wearing are caused by increased in dynamic deflection by poor chucking causes breakage.


How to Replace a Drill Chuck

Most of the cordless and power drills use keyed or keyless chuck with movable jaws. Most of the power drills require repairmen especially for jammed or damaged chuck. Whether you want to repair or upgrade, you first need to know how to repair drill chuck. Therefore here are tips that you need to know to achieve this.

Why replace the chuck.

Why is replacing a drill chuck necessary?Well, most people do it because of abuse or neglect but sometimes you might want to upgrade your drill you might want to switch keyless chuck or increase grip drill bits. Here are some ways you can keep your chuck in good condition:

  • Don’t use tools on a keyless chuck.
  • Don’t close the jaws of a keyless chuck or tighten it with a monkey wrench, channel lock pliers, water pump pliers because these tools will damage the chuck.
  • Don’t over-tighten the keyed chucks because the teeth can break or strip the threads on the jaws.
  • Oil the chuck regularly.

By doing this, you will have minimized possible breakages.

Determine the type of the chuck

Most handled drill chucks are connected to the drill motor.The best way to tell the type of your chuck is to open the jaws and to look at its base. Note the type of the screw head if it is there. If there is no screw, it is likely to be a tapered spindle and this procedure might not be applicable.

Tools and parts.

You will require the following tools to replace your drill chucks;

  • screwdriver-you will require it to remove retaining or set screw.
  • hemmer—this is used for pushing jaws into the chuck.
  • pin punch-it will help you push the chuck jaws and the setscrews.
  • allen /hex key-you will have to choose the one that will fit the chuck are removing.

Remove a working chuck

If your drill is broken but the chuck is still in good condition you will have to remove the chuck from the drill. When the drill is running the set screw tighten onto the spindle thus it can be challenging to remove. Therefore, you will need to open the chuck to remove the setscrew. Turn the chuck counterclockwise to remove it from the spindle.

Open and remove a seized chuck

If the chuck is seized use the key to turn int counterclockwise and tap the jaws with a hammer. Thereafter,remove the set screw and ensure the key is not pressing the ring gear Spin the chuck counterclockwise using a hammer but don’t damage the chuck key or the ring gear.

Replace the chuck

When the chuck is replaced well, it should turn easily on the spindle in a clockwise direction and the setscrew screw it counterclockwise. Open the jaws of the new chuck and re-insert the screw that you have removed earlier and tightened it in its place. If the screw seems loose after the initial use of the new chuck then you will have to re-tighten.

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