Question about Hilti TE 7-C 120V Rotary Hammer Drill

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Small ball inside chuck missing - Hilti TE 7-C 120V Rotary Hammer Drill

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Posted on Nov 17, 2010

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Blackanddecker typye 2 recip-saw handi saw cordless ,blade wont stay locked in while cutting keeps poping out worthless to use as soon as u put presure on it pops right out


There is a small ball inside the chuck that sometimes gets stuck on these quick release chucks. Check and see if it is still in there and if it is see if it is stuck. If it is just put a drop of oil on it and keep working it. It will loosen up and you will be back in operation.

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On makita hammer drill, bits fall out of chuck. How can I fix it?


This is an SDS chuck and uses ball in tapered slots to hold the bit - if the inside of the chuck is dirty (dust+grease) it will not operate correctly. Use a cleaning degreaser spray and wash the inside out whilst moving the chuck outer body up and down. Try your SDS bits in it and if it works okay - spray some WD40 in it and then keep clean and re lubricate it regularly after use - hope this helps

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Bit will not lock into chuck. Ball inside chuck is stuck in "in" position, Bit slides all the way in and out w/o engaging the ball.


Open locking sleeve, clean the inside with a good "rust type cleaner" WD40 if you can't find anything else, let it sit overnight, I suggest doing this 2 or 3 times, leave tool with drill end facing down. Clean out with small round wire brush, lubricate with white grease.

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I have a HILTI TE905 breaker and something is seems wrong with the chuck or the chilsal as it keeps falling out of the end and not gripping it. Is it possible to take the chuck apart to see if I can spot...


I have just dismantled my own TE 905 to see why it was dropping the chisels and have found the following:-

1. The chisel is worn and has almost become too small for the chuck. (mesure the thickness of the chisel at both ends of the hexagonal shaft and see the difference)

2. The chuck is worn and will probably need to be replaced.
I phoned Hilti today and was quoted £100 for ONE PART OF THE CHUCK!!!

a. The chuck as a whole can easily be removed by undoing the four torx screws that hold the chuck on to the main body.

b. The chuck can be dismantled by removing the retaining ring that holds the metal outer case in place at the front of the chuck. This is very fiddly and requires some engineering skill, the use of pointed instruments could easily result in injury.

The third fix is the one I am going to use to 'patch up' my old breaker. This involves welding some small amounts of dissimilar weld onto the points of the hexagonal section at the rear of the chisel then grinding them to near enough the original size of the un-damaged section of the chisel.
This will very crudely stop the chisel from passing the ball bearings inside the chuck. PLEASE NOTE THAT ANY HEAT APPLIED TO THE CHISEL WILL CAUSE STRESS AND POSSIBLE FAILURE OF THE CHISEL. ANY MODIFICATIONS OF THIS NATURE COULD RESULT IN INJURY TO PERSONS WORKING AROUND YOU AND ARE NOT RECOMMENDED IF YOU ARE WORKING AT HEIGHT OR WITH PEOPLE BELOW YOU. This is a fix that should only be attempted by competent engineers for use on a DIY or small job basis. Hope this helps.

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1 Answer

Damaged chuck on a a.e.g. drill, chuck is one half inch, no screw inside chuck, how do i remove the chuck, the chuck brand is jacobs, thanks, jim


Jacobs makes a couple different kinds. You say no screw inside so I would guess it is the tapered fit. It will require a couple of shims to be driven in between the chuck and head of the drill to press the chuck off. There are tools to do this but sometimes this can be done with shims. Shim each side the same and tap them in equally. If you are familiar with the pickle fork used on auto's to remove ball-joints, something like this may work as well. I hope this helps you.

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1 Answer

How to replace the chuck on a hilti te10


The complete chuck is not easily replaced. It you stick an SDS+ bit in the chuck and it seems to fit tight without much wiggle then the chuck can be replaced without taking the tool apart. The rubber cap on the end will just pull off. Next the locking collar with the annular spring will come off with the out side sleeve. Underneath is the guide tube with two enlongated rollers. The locking collar should have a ball bearing underneath it that locks the sleeve in place. Usually the roller bearings or ball bearing are missing.

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Hilti TE 10 drill. It doesn't seem to hold the


Probably a missing ball problem---contact Hilti website.

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The bit in my Stanley ratchet screwdriver does not lock into place, falls out when screwdriver is pointing down


There is a small springs steel wire that fits into the chuck. the bit slides into the chuck and then into the spring and the spring holds the bit inside the chuck. This ring seems to be missing. Thus the bit falls out. You might try going to a hardware store and they make a device that is two magnets held together with a rubber band. When they are together there is a small hole in the center. You can slide any screwdriver or bit into the hole in the center and it magnetizes the bit or driver. Magnetizing your bits should keep them from falling out of the ratchet screwdriver.

Dec 04, 2009 | Tools & Hardware - Others

1 Answer

Fix a broken chuck assembly on a Milwaukee 5303-20 rotary


No hard at all go to Milwaukeetool.com and type in your model number and you can download a parts schematic for this showing the complete assembly directions.

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