Drill repair

Tim Lamb

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Nov 17, 2022, 3:39:40 PM11/17/22

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Ok. so there is an impact driver in the post:-)

While I have your attention, has anyone attempted a gearbox repair on a
Makita HP457D ?

Engaging low speed has worsened such that several attempts are now
needed. Stays engaged once the right slot is found.
--
Tim Lamb

Andy Burns

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Nov 17, 2022, 3:44:15 PM11/17/22

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Tim Lamb wrote:

> has anyone attempted a gearbox repair on a Makita HP457D ?

I have a BHP458, the keyless chuck's going a bit graunchy, but that's all.

Thomas Prufer

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Nov 18, 2022, 4:35:48 AM11/18/22

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On Thu, 17 Nov 2022 20:39:24 +0000, Tim Lamb <t...@marfordfarm.demon.co.uk>
wrote:

>While I have your attention, has anyone attempted a gearbox repair on a
>Makita HP457D ?
>
>Engaging low speed has worsened such that several attempts are now
>needed. Stays engaged once the right slot is found.

A generic repair is to open gearbox, redistribute the grease inside, and add
some -- I use a lithium grease as for grease guns. This generally lets the
gearbox run quieter, and more smoothly. I'd think it there's a chance it'd help
in this case -- easy enough to try, and you could have a look round for any
obvious wear. Axial wear can be compensated by using a washer as a shim, radial
not so much.

Thomas Prufer

Tim Lamb

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Nov 18, 2022, 5:17:28 AM11/18/22

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In message <a7kenh1l4c8afn4rk...@4ax.com>, Thomas Prufer
<prufer...@mnet-online.de.invalid> writes

Ok. I was hoping someone would have done a strip down and could point
up any *gotchas* regarding benefits. As things stand, the drill is
usable but moderately annoying: drill the holes and then struggle to
change gear for fitting the screws.
--
Tim Lamb

Tim Lamb

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Nov 18, 2022, 6:58:00 AM11/18/22

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In message <6thl7frw...@marfordfarm.demon.co.uk>, Tim Lamb
<t...@marfordfarm.demon.co.uk> writes

Ok. All. I have found a video of a gearbox change. At 34.56 my
enthusiasm is dwindling:-)

https://www.youtube.com/watch?v=Nqo9Dq_Te_E

--
Tim Lamb

John Rumm

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Nov 18, 2022, 8:27:59 PM11/18/22

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You can probably get the whole drill "body only" for that kind of money...

> https://www.youtube.com/watch?v=Nqo9Dq_Te_E
>
>
>

--
Cheers,

John.

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

alan_m

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Nov 19, 2022, 7:25:40 AM11/19/22

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Could the fault be as simple as
https://youtu.be/HeehcC0M5pc?t=233

--
mailto : news {at} admac {dot} myzen {dot} co {dot} uk

Tim Lamb

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Nov 19, 2022, 10:38:25 AM11/19/22

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In message <jts0a0...@mid.individual.net>, alan_m
<ju...@admac.myzen.co.uk> writes

>On 17/11/2022 20:39, Tim Lamb wrote:
>> Ok. so there is an impact driver in the post:-)
>> While I have your attention, has anyone attempted a gearbox repair
>>on a Makita HP457D ?
>> Engaging low speed has worsened such that several attempts are now
>>needed. Stays engaged once the right slot is found.
>
>Could the fault be as simple as
>https://youtu.be/HeehcC0M5pc?t=233

Indeed. I found that one but struggled with his English.

As John says the bare drill can be bought for £39.95 or so.

I might go as far as the checking slider but would be very surprised to
find that level of crap inside.

The bare impact driver is due here between 4 and 6.00 today.
(Hermes/evri) This may inform my choice:-)
>

--
Tim Lamb

alan_m

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Nov 19, 2022, 11:01:29 AM11/19/22

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On 19/11/2022 15:36, Tim Lamb wrote:

> I might go as far as the checking slider but would be very surprised to
> find that level of crap inside.

I may have the same drill as yours and it was crap (plaster dust) that
stopped my forward/reverse switch from working smoothly. I didn't
dismantle too much to clean that out to get it working again.

The only other thing I've managed to break after many years of hard use
was the keyless chuck. One of the fingers that held the drill bits
jammed up. This was replaced with a third party chuck from ebay for
under £10.

>
> The bare impact driver is due here between 4 and 6.00 today.
> (Hermes/evri) This may inform my choice:-)
>>

Just remember that it doesn't have a chuck so you need bits with an end
that can be held by the driver mechanism or a (magnetic) bit holder.

Examples
https://www.ebay.co.uk/itm/273585418517
https://www.ebay.co.uk/itm/163922517693
https://www.ebay.co.uk/itm/183907559013

You can also get bit holders with the same latching mechanism as on the
end of the driver which can act as an extension to get into tighter spaces.

Tim Lamb

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Nov 19, 2022, 1:30:24 PM11/19/22

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In message <jtscul...@mid.individual.net>, alan_m
<ju...@admac.myzen.co.uk> writes

>On 19/11/2022 15:36, Tim Lamb wrote:
>
>> I might go as far as the checking slider but would be very surprised
>>to find that level of crap inside.
>
>I may have the same drill as yours and it was crap (plaster dust) that
>stopped my forward/reverse switch from working smoothly. I didn't
>dismantle too much to clean that out to get it working again.

Ok. The hammer action is poor on this drill so most work has been
drilling timber and then fitting screws.

>
>The only other thing I've managed to break after many years of hard use
>was the keyless chuck. One of the fingers that held the drill bits
>jammed up. This was replaced with a third party chuck from ebay for
>under £10.
>
>> The bare impact driver is due here between 4 and 6.00 today.
>>(Hermes/evri) This may inform my choice:-)

It is here! As advised!

>>>
>
>
>Just remember that it doesn't have a chuck so you need bits with an end
>that can be held by the driver mechanism or a (magnetic) bit holder.
>
>Examples
>https://www.ebay.co.uk/itm/273585418517
>https://www.ebay.co.uk/itm/163922517693
>https://www.ebay.co.uk/itm/183907559013
>
>
>You can also get bit holders with the same latching mechanism as on the
>end of the driver which can act as an extension to get into tighter
>spaces.

I have a mains operated impact driver so plenty of suitable bits.
>

--
Tim Lamb

Dave Plowman (News)

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Nov 20, 2022, 10:38:55 AM11/20/22

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In article <tl9ber$327kg$1...@dont-email.me>,

John Rumm <see.my.s...@nowhere.null> wrote:
> > Ok. All. I have found a video of a gearbox change. At 34.56 my
> > enthusiasm is dwindling:-)

> You can probably get the whole drill "body only" for that kind of money...

Might be worth looking out for a used one on Ebay where the battery has
failed and they've bought new complete?

--
*How do they get the deer to cross at that yellow road sign?

Dave Plowman da...@davenoise.co.uk London SW
To e-mail, change noise into sound.

John Rumm

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Nov 20, 2022, 11:53:15 AM11/20/22

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I thought what Tim ordered was more "impact wrench" rather than driver?

(although with a suitable square drive to hex adaptor, it would probably
work ok for driving screws etc as well as torquing nuts!)

Tim Lamb

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Nov 20, 2022, 12:23:18 PM11/20/22

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In message <tldm1n$3i5a8$1...@dont-email.me>, John Rumm
<see.my.s...@nowhere.null> writes

Terminology? It has a hex gripper although I do have a hex-square
adapter.
>

--
Tim Lamb

Roger Mills

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Nov 20, 2022, 5:18:39 PM11/20/22

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Indeed. I've got an impact wrench with a 1/2" square drive which is
capable of undoing tight wheelnuts. It would smash the hell out of your
average screw.
--
Cheers,
Roger

John Rumm

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Nov 20, 2022, 7:10:53 PM11/20/22

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On 20/11/2022 17:13, Tim Lamb wrote:

My bad in which case, perhaps I am confusing with one mentioned in
another thread.

Yup impact driver[1], normally has a sprung female hex socket on the
front to hold standard hex bits etc. Impact wrench usually larger and
more powerful with a square drive.

[1] http://wiki.diyfaq.org.uk/index.php/Impact_driver