Hello Help please, I need to replace the chuck and not sure how to remove the old one ( not SDS ). I can see where to put the spanner on the shaft. Do I stick the chuck in a vice and use the spanner to remove it. Until I remove the old one I don't know the size of the replacement. Many thanks Keith
Look down inside the chuck itself as there may be a screw inside it, you may need a torch or a good light source to see it though The head may be a cross point, star or allen key (perhaps)
I think you place a spanner on that flat, and secure that in a vice or similar to hold the drill shaft steady. Then position the chuck key in place and whallop it firmly with a rubber mallet to unscrew the chuck. As you look direct at the end of the chuck, you aim to unscrew it anticlockwise. I think.
Have you opened the chuck up as far as it will open ?? You will find it is a countersink head screw http://www.mtmc.co.uk/Bosch-PSB-680-2-RE-/-0603161596-Spare-Parts__p-52949.aspx
Yes, fully open. At the bottom of the 3 grip bars there is a lip then a further hole about an inch deep, nothing at the bottom
To see if the screw is missing get a long thin screw / bolt or similar, push it into the hole & feel to see if there is a thread in the hole itself. You may find that the screw is in a recess & may be grease or dirt of the head of the screw. The countersink screw may be counter clockwise (Left hand thread) Make sure the drill is not plugged in though, when tapping the nut counter clockwise aka (Left hand thread)
The parts diagram certainly shows a screw, but I have a Makita 1620 that doesn't have one . If I may make a suggestion, it may be better to grip a large Allen key in the chuck,as it will give you more purchase,rather than use the chuck key. The thread is probably 1/2-20 UNF.
Hi Guys. I forgot to put that it is keyless type. I have scraped the bottom of the hole and definitely no screw or key though it feels like there could be a thread.
Follow Malkies suggestion for gripping an allen key or similar strong angled metal in the chuck, then with the spanner tap it counter clockwise, & bob should be your uncle
I'm sure, just pointing out that it should have one. If the screw is missing or removed, then grip a 10mm Allen key in the chuck by the short end. Clamp drill in a vice wrapped in a towel to protect its body from damage. Whack the Allen key anti clockwise with a hammer, Chuck comes undone, Simples.