What Holds the Chuck to Shaft in Place

Introduction

The chuck on a drill is often the start part to clothing out or break. Luckily, replacing it is a fairly easy process that does not normally require disassembly of the drill.

Even if the spindle or gearbox of your drill needs replacing - which does crave disassembly - it'due south all-time to remove the chuck before disassembling the housing.

This guide should assist yous to supplant the chuck on well-nigh whatsoever corded or cordless drill, equally drill chucks are almost always attached to the spindle past a screw thread. By far the near mutual thread size is 1/two" x 20tpi UNF, just smaller drills can take a 3/8" or even smaller thread.

In some rare cases such as bending drills, very erstwhile models or large machines, the chuck may be mounted on a tapered shank or it may even have a proprietary fitting requiring disassembly of the housing. In those cases, this guide is not applicable. When in doubt, refer to the technical documentation for your make and model.

• Whenever performing repair or maintenance, make certain to unplug the tool showtime.

• The last thing you want is for the drill to start spinning a wrench around at 3000 RPM in case you inadvertently pull the trigger!



• Open up the jaws all the way and look for a retaining screw at the bottom of the chuck. If a screw is present, you will demand to remove it before you can unscrew the chuck.

• These retaining screws always take a left hand thread, so yous'll take to plough clockwise to remove it.

• Endmost the jaws until they just touch the screwdriver can assist to go on information technology centered (especially on slotted screws) and perpendicular.

• The screw tin be stubborn to come loose, especially if information technology has threadlocking compound on information technology or if it is rusty. An impact driver can work wonders here. And recall - clockwise!

• Depending on the specific make and model of your drill and chuck, information technology may be possible to grip either or both with a regular open up end wrench.

• Some spindles accept a hexagon-shaped portion, some have flats machined on ii sides. Some chucks also accept ii flats or a hex shape machined either at the front or dorsum end.

• Depending on which portions you lot tin fit a wrench to, y'all'll be using the Twin Wrench, Single Wrench or No Wrench Method.

• Use the Twin Wrench Method whenever possible as this is more civilized and allows you to use more controlled strength.

• If both the spindle and the chuck have some provision that allows the use of a wrench, information technology'due south your lucky solar day!

• In some cases, y'all may need to use a sparse wrench (or grind down a regular one) as there may not be sufficient space to fit a regular size wrench.

• Unlike the retaining screw, the chuck is held on with a regular correct-hand thread. Plough counter-clockwise to remove.

• With the opposing action of two wrenches, even the near stubborn of chucks should come loose.

• If the chuck has no provision for a wrench, the easiest way to turn it forcefully is by means of a hex central gripped in the chuck jaws past its short cease.

• If a wrench can be fitted to the spindle, lay the drill flat on the edge of a workbench or sturdy table, with the wrench resting on the tabular array, the chuck overhanging the edge and the hex key pointing slightly up from horizontal.

• Information technology won't injure to try if you can release the chuck by pushing downwards on the hex key by hand - though this will rarely piece of work.

• If paw forcefulness isn't sufficient, firmly concur downwardly the drill and requite the end of the hex wrench a solid whack, preferably with a wooden or plastic hammer. A sharp accident should loosen the chuck instantly.

• Even if the spindle cannot exist gripped by any means, the hex key method described in the previous footstep will usually work on both corded and cordless models.

• Many cordless drills take an automated spindle lock.

• On mains powered drills, inertia of motor and gears usually offers sufficient resistance to free the chuck from the spindle.

• If you're relying solely on inertia, y'all need a sudden jolt to loosen the chuck. Press down hard on the drill to continue it from moving and striking the hex key with a especially sharp accident.

• This volition take a steel hammer - much equally you may hate to mistreat your honey hex wrench like that - as a plastic or wooden hammer would absorber the impact.

• For cordless drills and depression speed/high torque corded models, an culling to the No Wrench Method is to grip the hex key in a vise, put the drill in reverse, hold it tightly with both hands and clasp the trigger.

• However this method is not for beginners as it is non without risk: the reaction torque could hurt your wrist and the locked rotor current could burn out the drill motor.

• If the drill has a mechanical speed selector and/or clutch, make sure to set the gear to the lowest speed and/or the clutch to the highest setting.

• If the chuck is completely cleaved, yous may non exist able to tighten its jaws on a hex key. In those cases, the Single Wrench or No Wrench Method won't work.

• On keyed chucks, if no other provision for gripping is nowadays, you can use a claw spanner by locating the pin in one of the holes for the chuck key.

• If you were built-in nether a very lucky star, yous might become away with plumbing fixtures a chuck fundamental and hitting that with a hammer at just the right bending. I did non tell you to do that.

• A pipe wrench will grip just about any chuck, but at the risk of damaging it.

• If all else fails, it is always possible to disassemble the drill, clamp either the chuck or the spindle in a vise and grip the other part with a pipe wrench or other gripping tool. This is very likely to damage the spindle and/or chuck though.

• If there's no retaining screw and you lot conceptualize forceful counterclockwise action (equally when unscrewing), apply a small-scale amount of threadlocking compound to the spindle thread.

• Use a medium-strength multifariousness, not the kind you'll accept to rut with a blowtorch if yous need to accept off the chuck over again at a afterward stage!

• Screw the chuck onto the spindle as far as it will go. Yous don't demand to tighten information technology with excessive force, information technology volition tighten itself with normal utilise.

• Insert and tighten the retaining screw if applicable (not all chucks are counterbored to accept a retaining screw).

• Counter-clockwise of form!

• If the screw is damaged, use a fresh 1 to spare yourself some aggravation down the road.

• It doesn't hurt to also treat these threads to a dab of threadlocker.

• Presto - your new chuck should provide you with years of drilling joy!

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Source: https://www.ifixit.com/Guide/Power+Drill+Chuck+Replacement/75418

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