Dremmel minidrill , normal or worn ?

[N_Cook]

Mod 358, ser 5-13. I'd not noticed before but there is a lot of axial
movement of the chuck. Normal or worn ? Went inside , needed a clean out and
lubricating if nothing else. There is a wavy thin compression spring/washer
on the axle but it is about 1mm away from the bearing, so about 2mm of
possible movement between static and active use.


--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/

 

[Dave Platt]

Mod 358, ser 5-13. I'd not noticed before but there is a lot of axial
movement of the chuck. Normal or worn ? Went inside , needed a clean out and
lubricating if nothing else. There is a wavy thin compression spring/washer
on the axle but it is about 1mm away from the bearing, so about 2mm of
possible movement between static and active use.

My model 359 Dremel has perhaps .5 mm of play along the axis.

--
Dave Platt <dplatt@radagast.org> AE6EO
Friends of Jade Warrior home page: http://www.radagast.org/jade-warrior
I do _not_ wish to receive unsolicited commercial email, and I will
boycott any company which has the gall to send me such ads!

 

[N_Cook]

Dave Platt <dplatt@radagast.org> wrote in message
news:2mfna6-1js.ln1@radagast.org...

Mod 358, ser 5-13. I'd not noticed before but there is a lot of axial
movement of the chuck. Normal or worn ? Went inside , needed a clean out
and
lubricating if nothing else. There is a wavy thin compression
spring/washer
on the axle but it is about 1mm away from the bearing, so about 2mm of
possible movement between static and active use.

My model 359 Dremel has perhaps .5 mm of play along the axis.

--
Dave Platt <dplatt@radagast.org> AE6EO
Friends of Jade Warrior home page: http://www.radagast.org/jade-warrior
I do _not_ wish to receive unsolicited commercial email, and I will
boycott any company which has the gall to send me such ads!

Normally it would not matter but yesterday I was using it for "precision
grinding" but as very light back torque/ cutting force. I don't think it
affected things, the reaction thrust from the fan was enough to make sure
the chuck did not move forward. I will have another look now the grinding
job is done.


--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/

 

[N_Cook]

some repair notes
Mark which way round the bearing retaining clips are mounted and
the stator orientation before unclipping the bearings.
Note the stator wire furthest from the cable inlet goes under
the brush mount. a nylon pad is located as axle back stop.
The shaft is domed at the end and for some odd reason a pip on
top of that that had worn into the pad. Turned this pad around
and added 1mm extra padding glued behind it. But was too much
so removed and added (glued in place) 0.6mm instead. To check out motor and
use commutator bedding stone its a matter of
taping around the chuck lock spring ring and a couple of cable
ties around each brush mount and around 2 partially replaced body screw and
through vent holes
to operate with the commutator exposed.
Triac BT24A, 100nF 250V, 10K,4.7K, 390K , 56R
and log pot that measured 220K max, in cct