Flex shaft grinder maintenance

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Flex shaft grinder maintenance

This topic has 8 replies, 8 voices, and was last updated 8 March 2018 at 10:33 by Ian S C.

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6 March 2018 at 17:55 #344719
Rainbows
Participant
@rainbows
Now a proud owner of a Wolf flex shaft grinder

It has two speeds 11,500 and 1200 RPM. The motor has a gearbox inside and to switch speeds you unscrew the flex shaft off one output and onto the other. However both the flex shaft and the plug that covers the output not in use and stuck on tight. I don't want to use pliers for damaging the nice knurling but putting cloth between the pliers and nut doesn't give enough grip. Any ideas how to get it free without marring it?

Also should I be lubricating the flex shaft itself? If so what should I use?

More dumb questions probably yet to come
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6 March 2018 at 17:55 #18869
Rainbows
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@rainbows
6 March 2018 at 18:12 #344723
Peter Tucker
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@petertucker86088
Hi Rainbows,

It wouldn't be a left hand thread?

Peter.
6 March 2018 at 18:35 #344727
Tractor man
Participant
@tractorman
I wouldn’t have thought it would be left hand thread but worth a try.
Molybdenum grease for the shaft and oil for the headpiece is what I use.
Best regards Mick
6 March 2018 at 18:46 #344731
Grindstone Cowboy
Participant
@grindstonecowboy
Firstly, apply a bit of WD40 or Plus Gas and let it soak in. Then bore a hole in a piece of wood the same diameter as the knurled nut, then split the wood into two – effectively making a set of curved safe jaws to go around the nut. Pop it in a vice , or a G clamp, and carefully turn, trying both directions in case it is LH.

Of course, one of the nuts might get in the way of the other so it might be a bit fiddly.

Regards,

Rob
6 March 2018 at 19:24 #344738
Michael Gilligan
Participant
@michaelgilligan61133
Posted by Rainbows on 06/03/2018 17:55:52:

… I don't want to use pliers for damaging the nice knurling but putting cloth between the pliers and nut doesn't give enough grip. Any ideas how to get it free without marring it?

.

Curved-jaw 'Mole Grips' lined with soft copper strip.

MichaelG.

.

I picked-up a few of these cheaply at a car-boot sale … they are ideal material

https://www.travisperkins.co.uk/Easytrim-Easy-Fix-Copper-Slate-Strap-100-Pk/p/530334

Edited By Michael Gilligan on 06/03/2018 19:30:08
7 March 2018 at 18:47 #344884
mechman48
Participant
@mechman48
My Aldi mini bench grinder ( usual disclaimer ) has a flexible shaft attachment & that is definitely a left hand thread, so the odds are…

George.
8 March 2018 at 00:03 #344933
peak4
Participant
@peak4
I'd say LH thread, if you have a peruse of these two links

Link-1

Link-2

Nice find by the way

Bill
8 March 2018 at 10:33 #344969
Ian S C
Participant
@iansc
Wrap a thick bit of leather around it (bit of an old belt), use a large pair of Polygrip/Channel Lock pipe pliiers.

Ian S C
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