I have a Makita MXT drill (cordless combi).

Unfortunately, though it's apparently in most respects a decent bit of
kit, the chuck is absolute garbage. Even with the easiest of tasks,
the bits work loose. On hammer action, it works loose even just
running it in the air!

So I've decided to replace the chuck. Even the cheapo drills in B&Q
have what seem good designs. I've seen Rohm and Jacobs chucks which
apparently "lock" tight with a clicking mechanism, and also usefully
have a free spinning outer shell on the chuck, Ii guess so you can put
your hand on it to guide the drill while in action. I'd like to hear
of recommendations and where I might purchase (ebay seems obvious!)

Second, I don't seem to be able to remove my existing chuck. I've
removed the bolt that runs down the middle of it. However, after that
I'm stuck. I've put a big allen key in the chuck and whacked it in all
directions and can't get it to budge. Any help with that would be
welcome too.

Thanks.

wrote in message
ups.com...
I have a Makita MXT drill (cordless combi).

Unfortunately, though it's apparently in most respects a decent bit of
kit, the chuck is absolute garbage. Even with the easiest of tasks,
the bits work loose. On hammer action, it works loose even just
running it in the air!

So I've decided to replace the chuck. Even the cheapo drills in B&Q
have what seem good designs. I've seen Rohm and Jacobs chucks which
apparently "lock" tight with a clicking mechanism, and also usefully
have a free spinning outer shell on the chuck, Ii guess so you can put
your hand on it to guide the drill while in action. I'd like to hear
of recommendations and where I might purchase (ebay seems obvious!)

Second, I don't seem to be able to remove my existing chuck. I've
removed the bolt that runs down the middle of it. However, after that
I'm stuck. I've put a big allen key in the chuck and whacked it in all
directions and can't get it to budge. Any help with that would be
welcome too.

When I did my Makita Small Tools training course a while ago, the
recommended way was to drill through the side plastic behind the chuck with
a 3.2mm drill approx halfway through the diameter of the chuck mount at 90
degrees.
Insert an Allen key through the hole to loc the chuck and put another (8mm)
Allen key in the chuck then strike smartly anti-clockwise to release the
chuck.
The screw sometimes found in the centre is left hand, but you have removed
it.
There *might* be threadlocking compound on the threads, so warming carefully
the chuck will assist in release.

On 29 Apr, 15:04, "R" wrote:
wrote in message

ups.com...



I have a Makita MXT drill (cordless combi).

Unfortunately, though it's apparently in most respects a decent bit of
kit, the chuck is absolute garbage. Even with the easiest of tasks,
the bits work loose. On hammer action, it works loose even just
running it in the air!

So I've decided to replace the chuck. Even the cheapo drills in B&Q
have what seem good designs. I've seen Rohm and Jacobs chucks which
apparently "lock" tight with a clicking mechanism, and also usefully
have a free spinning outer shell on the chuck, Ii guess so you can put
your hand on it to guide the drill while in action. I'd like to hear
of recommendations and where I might purchase (ebay seems obvious!)

Second, I don't seem to be able to remove my existing chuck. I've
removed the bolt that runs down the middle of it. However, after that
I'm stuck. I've put a big allen key in the chuck and whacked it in all
directions and can't get it to budge. Any help with that would be
welcome too.

When I did my Makita Small Tools training course a while ago, the
recommended way was to drill through the side plastic behind the chuck with
a 3.2mm drill approx halfway through the diameter of the chuck mount at 90
degrees.
Insert an Allen key through the hole to loc the chuck and put another (8mm)
Allen key in the chuck then strike smartly anti-clockwise to release the
chuck.
The screw sometimes found in the centre is left hand, but you have removed
it.
There *might* be threadlocking compound on the threads, so warming carefully
the chuck will assist in release.

Thanks. I'm not quite clear on the reason for drilling the hole, and
to be honest I'm very reluctant to do that! I have tried clamping a
big allen key in the chuck, and striking it. Indeed, I've probably
done about half a dozen full rotations in a counter clockwise
direction, but it's still not loose.

wrote in message
oups.com...
On 29 Apr, 15:04, "R" wrote:
wrote in message

ups.com...



I have a Makita MXT drill (cordless combi).

Unfortunately, though it's apparently in most respects a decent bit of
kit, the chuck is absolute garbage. Even with the easiest of tasks,
the bits work loose. On hammer action, it works loose even just
running it in the air!

So I've decided to replace the chuck. Even the cheapo drills in B&Q
have what seem good designs. I've seen Rohm and Jacobs chucks which
apparently "lock" tight with a clicking mechanism, and also usefully
have a free spinning outer shell on the chuck, Ii guess so you can put
your hand on it to guide the drill while in action. I'd like to hear
of recommendations and where I might purchase (ebay seems obvious!)

Second, I don't seem to be able to remove my existing chuck. I've
removed the bolt that runs down the middle of it. However, after that
I'm stuck. I've put a big allen key in the chuck and whacked it in all
directions and can't get it to budge. Any help with that would be
welcome too.

When I did my Makita Small Tools training course a while ago, the
recommended way was to drill through the side plastic behind the chuck
with
a 3.2mm drill approx halfway through the diameter of the chuck mount at
90
degrees.
Insert an Allen key through the hole to loc the chuck and put another
(8mm)
Allen key in the chuck then strike smartly anti-clockwise to release the
chuck.
The screw sometimes found in the centre is left hand, but you have
removed
it.
There *might* be threadlocking compound on the threads, so warming
carefully
the chuck will assist in release.

Thanks. I'm not quite clear on the reason for drilling the hole, and
to be honest I'm very reluctant to do that! I have tried clamping a
big allen key in the chuck, and striking it. Indeed, I've probably
done about half a dozen full rotations in a counter clockwise
direction, but it's still not loose.

You don't mention a specific model.

The reason for the hole is to provide an aperture to put the 3 mm Allen key
through into the hole in the side of the shaft to lock it.
Even in low gear (If chooseable) all you will succeed in doing is spinning
the shaft.

If the 2 shell casings are removable (Usually several screws around the
case) you might try stripping the gearing out and holding in a vice using
aluminium or copper vice jaws (Flattened plumbing pipe will do) and then try
to undo the chuck.

On 29 Apr, 09:46, wrote:
I have a Makita MXT drill (cordless combi).

Unfortunately, though it's apparently in most respects a decent bit of
kit, the chuck is absolute garbage. Even with the easiest of tasks,
the bits work loose. On hammer action, it works loose even just
running it in the air!

So I've decided to replace the chuck. Even the cheapo drills in B&Q
have what seem good designs. I've seen Rohm and Jacobs chucks which
apparently "lock" tight with a clicking mechanism, and also usefully
have a free spinning outer shell on the chuck, Ii guess so you can put
your hand on it to guide the drill while in action. I'd like to hear
of recommendations and where I might purchase (ebay seems obvious!)

Second, I don't seem to be able to remove my existing chuck. I've
removed the bolt that runs down the middle of it. However, after that
I'm stuck. I've put a big allen key in the chuck and whacked it in all
directions and can't get it to budge. Any help with that would be
welcome too.

Thanks.

If the drill's not too old, get it checked under the warranty - the
chuck in mine is absolutely fine. The bits work loose if I catch the
side of the chuck against something occasionally, but otherwise, as
long as I tighten it properly to start with, it's fine.

A

wrote in message
oups.com...
On 29 Apr, 15:04, "R" wrote:
wrote in message

ups.com...



I have a Makita MXT drill (cordless combi).

Unfortunately, though it's apparently in most respects a decent bit of
kit, the chuck is absolute garbage. Even with the easiest of tasks,
the bits work loose. On hammer action, it works loose even just
running it in the air!

So I've decided to replace the chuck. Even the cheapo drills in B&Q
have what seem good designs. I've seen Rohm and Jacobs chucks which
apparently "lock" tight with a clicking mechanism, and also usefully
have a free spinning outer shell on the chuck, Ii guess so you can put
your hand on it to guide the drill while in action. I'd like to hear
of recommendations and where I might purchase (ebay seems obvious!)

Second, I don't seem to be able to remove my existing chuck. I've
removed the bolt that runs down the middle of it. However, after that
I'm stuck. I've put a big allen key in the chuck and whacked it in all
directions and can't get it to budge. Any help with that would be
welcome too.

When I did my Makita Small Tools training course a while ago, the
recommended way was to drill through the side plastic behind the chuck
with
a 3.2mm drill approx halfway through the diameter of the chuck mount at
90
degrees.
Insert an Allen key through the hole to loc the chuck and put another
(8mm)
Allen key in the chuck then strike smartly anti-clockwise to release the
chuck.
The screw sometimes found in the centre is left hand, but you have
removed
it.
There *might* be threadlocking compound on the threads, so warming
carefully
the chuck will assist in release.



Thanks. I'm not quite clear on the reason for drilling the hole, and
to be honest I'm very reluctant to do that! I have tried clamping a
big allen key in the chuck, and striking it. Indeed, I've probably
done about half a dozen full rotations in a counter clockwise
direction, but it's still not loose.


I suppose that you're relying solely on the braking force generated by the
geared down drill armature. That may not be enough. I would follow the
advice given to you: drill that hole (it may not have to go as deep as
directed). Then you'll have a _more positive_ resistance when you're
attempting to unscrew that chuck.

Sylvain.

On 29 Apr, 17:33, "Sylvain VAN DER WALDE"
wrote:
wrote in message

oups.com...



On 29 Apr, 15:04, "R" wrote:
wrote in message

roups.com...

I have a Makita MXT drill (cordless combi).

Unfortunately, though it's apparently in most respects a decent bit of
kit, the chuck is absolute garbage. Even with the easiest of tasks,
the bits work loose. On hammer action, it works loose even just
running it in the air!

So I've decided to replace the chuck. Even the cheapo drills in B&Q
have what seem good designs. I've seen Rohm and Jacobs chucks which
apparently "lock" tight with a clicking mechanism, and also usefully
have a free spinning outer shell on the chuck, Ii guess so you can put
your hand on it to guide the drill while in action. I'd like to hear
of recommendations and where I might purchase (ebay seems obvious!)

Second, I don't seem to be able to remove my existing chuck. I've
removed the bolt that runs down the middle of it. However, after that
I'm stuck. I've put a big allen key in the chuck and whacked it in all
directions and can't get it to budge. Any help with that would be
welcome too.

When I did my Makita Small Tools training course a while ago, the
recommended way was to drill through the side plastic behind the chuck
with
a 3.2mm drill approx halfway through the diameter of the chuck mount at
90
degrees.
Insert an Allen key through the hole to loc the chuck and put another
(8mm)
Allen key in the chuck then strike smartly anti-clockwise to release the
chuck.
The screw sometimes found in the centre is left hand, but you have
removed
it.
There *might* be threadlocking compound on the threads, so warming
carefully
the chuck will assist in release.

Thanks. I'm not quite clear on the reason for drilling the hole, and
to be honest I'm very reluctant to do that! I have tried clamping a
big allen key in the chuck, and striking it. Indeed, I've probably
done about half a dozen full rotations in a counter clockwise
direction, but it's still not loose.

I suppose that you're relying solely on the braking force generated by the
geared down drill armature. That may not be enough. I would follow the
advice given to you: drill that hole (it may not have to go as deep as
directed). Then you'll have a _more positive_ resistance when you're
attempting to unscrew that chuck.

Sylvain.

Sorry, I am *really* dumb, I really have no idea what is going on
inside the case. Let me get this right: I drill a hole in the black
plastic section between the drill itself and the chuck? (this is the
rotating piece which sets the torque on my 8414D)? Then I stick an
allen key into it, and what does it latch onto when inside? (Can't
pretend drilling a hole in the case appeals to much...)

Another question which may convince you I am out of my depth he
when I'm trying to release the chuck, in which direction am I trying
to turn it as I look at the drill with it pointing at me?

wrote:
I have a Makita MXT drill (cordless combi).

Unfortunately, though it's apparently in most respects a decent bit of
kit, the chuck is absolute garbage. Even with the easiest of tasks,
the bits work loose. On hammer action, it works loose even just
running it in the air!

Sounds like it is shagged certainly. The previous generation of those
drills used ratchet action Rhom chucks with a free spinning cap which
really were first rate. Some of the later ones are not as good IMHO
(although not as bad as yours - so something is not right with it)

Second, I don't seem to be able to remove my existing chuck. I've
removed the bolt that runs down the middle of it. However, after that
I'm stuck. I've put a big allen key in the chuck and whacked it in all
directions and can't get it to budge. Any help with that would be
welcome too.

Have you looked at the exploded diagram for your drill? It may help:

http://www.toolshopdirect.co.uk/part...Cordless_Tools


--
Cheers,

John.

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|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

John Rumm wrote:

Sounds like it is shagged certainly.

Have you looked at the exploded diagram for your drill? It may help:
http://www.toolshopdirect.co.uk/part...Cordless_Tools

Also bear in mind the experience of a. n. other contributor:
http://groups.google.com/group/uk.d-...e=source&hl=en

--
Andy

Andy Wade wrote:

Sounds like it is shagged certainly.

Have you looked at the exploded diagram for your drill? It may help:
http://www.toolshopdirect.co.uk/part...Cordless_Tools


Also bear in mind the experience of a. n. other contributor:
http://groups.google.com/group/uk.d-...e=source&hl=en

That is a good point and often overlooked. I am often surprised how cost
effective it can be using the official service route!


--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

On Mon, 30 Apr 2007 13:50:33 +0100, John Rumm
mused:

Andy Wade wrote:

Sounds like it is shagged certainly.

Have you looked at the exploded diagram for your drill? It may help:
http://www.toolshopdirect.co.uk/part...Cordless_Tools


Also bear in mind the experience of a. n. other contributor:
http://groups.google.com/group/uk.d-...e=source&hl=en

That is a good point and often overlooked. I am often surprised how cost
effective it can be using the official service route!

I've sent some of my drills into oficial service centres rather than
back to Makita directly and have had a replacement rear half and motor
for a 14.4V cordless and a service and few new parts on a 110V SDS for
about 30 quid. Hardly worth getting your fingers greased up.
--
Regards,
Stuart.

John Rumm wrote:
Andy Wade wrote:

Sounds like it is shagged certainly.

Have you looked at the exploded diagram for your drill? It may help:

http://www.toolshopdirect.co.uk/part...ss_Tools/Cordl
ess_Tools
Also bear in mind the experience of a. n. other contributor:

http://groups.google.com/group/uk.d-...4cf?dmode=sour
ce&hl=en

That is a good point and often overlooked.

It's a kind of selective blindness, a perfectly normal symptom of being
DIY Positive. Usually harmless but sometimes expensive.


--
Ian White

On 30 Apr, 17:35, Lurch wrote:
On Mon, 30 Apr 2007 13:50:33 +0100, John Rumm
mused:

Andy Wade wrote:

Sounds like it is shagged certainly.

Have you looked at the exploded diagram for your drill? It may help:
http://www.toolshopdirect.co.uk/part...ess_Tools/Cord...

Also bear in mind the experience of a. n. other contributor:
http://groups.google.com/group/uk.d-...e84cf?dmode=so...

That is a good point and often overlooked. I am often surprised how cost
effective it can be using the official service route!

I've sent some of my drills into oficial service centres rather than
back to Makita directly and have had a replacement rear half and motor
for a 14.4V cordless and a service and few new parts on a 110V SDS for
about 30 quid. Hardly worth getting your fingers greased up.
--
Regards,
Stuart.

Hmmm...does make you think. Thing is, money's tight and I've removed
the chuck from another old drill that will do. The one on the Makita
however is absolutely jammed solid. I rang Makita and have done as
they say: put in low gear, put in drill setting, pu in allen key and
smack anti clockwise. But it just won't budge!

On 30 Apr, 04:04, John Rumm wrote:

Sounds like it is shagged certainly. The previous generation of those
drills used ratchet action Rhom chucks with a free spinning cap which
really were first rate. Some of the later ones are not as good IMHO
(although not as bad as yours - so something is not right with it)
========================================/

Well, I finally got the bugger loose, and in fact installed a Rohm
Extra RV as you describe, John. This one he

http://www.roehm.biz/268.html?&L=1&u...ash=c966ea1d72

Superb. The ratcheting locking mechanism works an absolute treat, and
the spinning cap makes holding the drill so much easier (for me at
least). Brilliant design.

wrote:

Well, I finally got the bugger loose, and in fact installed a Rohm
Extra RV as you describe, John. This one he

http://www.roehm.biz/268.html?&L=1&u...ash=c966ea1d72

Superb. The ratcheting locking mechanism works an absolute treat, and
the spinning cap makes holding the drill so much easier (for me at
least). Brilliant design.

Yup, that looks like the one on mine. Handy to know you can order them
separately.

(the other change they made to the latest Makita combis was to add an
extra skirt round the base of the chuck - closing up the gap between the
back of the chuck and the front of the gearbox. Oddly I find that
reduces the grip you can get on the chuck because you can no longer get
hold of the rear edge of it)

--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/