The large black part of the chuck should turn left and right to extend (close) and retract (open) the three chuck teeth that hold the bit in place. Turn the chuck to open it far enough to get your bit fully in the chuck then turn it closed to hold the bit in. When the teeth make contact turn the chuck a bit further to get it tight enough that the bit won't slip. When you get used to it, sometimes it's easier to hold the chuck lightly and turn it by lightly squeezing the trigger to turn the chuck with the drill motor.
SOURCE: makita 6222D hole drill bit is stuck
When this happened to me I held the shaft of the drill bit tightly with my hand and reversed the direction of drive for an instant. It released at that point. It still does that occassionally though.
SOURCE: makita dc1804f charger will not charge new i-mh 1834 18v battery
I think your tryiong to charge NIMH batteries oon a charger designed for Lithium Ion batteries. With all the new style batteries such as NICAD, NIMH and LI-ION, charging becomes difficult. Most chargers pre NIMH and LI-ion, were designed for NICAD's. The best advise, match your batteries with the correct charger
SOURCE: makita 1420 - 14.4v 1.3Ah cordless drill
try toolpartsdirect.com & go to makita & type in model #
SOURCE: drill bit is stuck inside my makita drill chuck
Try using the low torque setting on the drill when reversing and something to assist you getting a better grip to hold the chuck from spinning when reversing. This may help.
Good Luck
SOURCE: lost 18V AC adaptor- can I use one made for laptop with 18V output?
I don't know if I would try this or not. there could be a difference in the amps and usually a charger is designed to shut off or go to trickle when the battery is fully charged.
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