Thread Tools
May 09, 2006, 10:11 AM
Guy Griffin
Guy Griffin
Guest

Dremel spindle thread size


Hi,

Does anyone have a Dremel multitool, and could they tell me the
length/diameter/pitch of the spindle thread? It may be imperial as these
things are American, and around 7mm/0.275" dia.

Reason is, I found a little dremel 3-pin chuck - just right for a
high-speed drill, except the thread in the back is obscured by a central
pin and not accessible to measure.

cheers
Guy
May 09, 2006, 12:11 PM
Peter Fairbrother
Peter Fairbrother
Guest

Re: Dremel spindle thread size


Guy Griffin wrote:

> Hi,
>
> Does anyone have a Dremel multitool, and could they tell me the
> length/diameter/pitch of the spindle thread? It may be imperial as these
> things are American, and around 7mm/0.275" dia.
>
> Reason is, I found a little dremel 3-pin chuck - just right for a
> high-speed drill, except the thread in the back is obscured by a central
> pin and not accessible to measure.


I haven't got an actual Dremel, but I have three dremel-type tools - the
collet chucks on all three have M8 x 0.8 threads (even though the collets
are not interchangeable - some are longer than others).

HTH


--
Peter Fairbrother

May 09, 2006, 12:11 PM
Tim Auton
Tim Auton
Guest

Re: Dremel spindle thread size


Peter Fairbrother <[email protected]> wrote:
>Guy Griffin wrote:
>>
>> Does anyone have a Dremel multitool, and could they tell me the
>> length/diameter/pitch of the spindle thread? It may be imperial as these
>> things are American, and around 7mm/0.275" dia.
>>
>> Reason is, I found a little dremel 3-pin chuck - just right for a
>> high-speed drill, except the thread in the back is obscured by a central
>> pin and not accessible to measure.

>
>I haven't got an actual Dremel, but I have three dremel-type tools - the
>collet chucks on all three have M8 x 0.8 threads (even though the collets
>are not interchangeable - some are longer than others).


My RotoCraft tool has metric threads too. The tools don't fit my
Dremel Professional. Nor does my metric thread pitch gauge. And I
couldn't find my imperial gauge. Quick and dirty (calipers and
counting) measurements of the Dremel spindle are:

OD 7.2mm (9/32"?)
Pitch around 0.63mm (40tpi?)
The spindle has just under 12mm threaded, and 2mm unthreaded (at the
end you hold). With a Dremel chuck fully screwed on there is 2mm of
thread still showing.


Tim
--
Did I really still have that sig?
May 09, 2006, 04:11 PM
Guy Griffin
Guy Griffin
Guest

Re: Dremel spindle thread size


Tim Auton wrote:
> Peter Fairbrother <[email protected]> wrote:
>> Guy Griffin wrote:
>>> Does anyone have a Dremel multitool, and could they tell me the
>>> length/diameter/pitch of the spindle thread?


> OD 7.2mm (9/32"?)
> Pitch around 0.63mm (40tpi?)
> The spindle has just under 12mm threaded, and 2mm unthreaded (at the
> end you hold). With a Dremel chuck fully screwed on there is 2mm of
> thread still showing.


Thanks Tim, much appreciated. A bit more web searching in various (US)
forums suggests most people clock it as .275" x 40tpi, so 9/32" (without
clearance) seems very likely.

I'm not surprised oriental copy tools aren't interchangeable, they seem
to prefer metric!

cheers
Guy
May 09, 2006, 08:11 PM

Re: Dremel spindle thread size



On 9-May-2006, Guy Griffin <[email protected]> wrote:

> Does anyone have a Dremel multitool, and could they tell me the
> length/diameter/pitch of the spindle thread? It may be imperial as these
> things are American, and around 7mm/0.275" dia.
>
> Reason is, I found a little dremel 3-pin chuck - just right for a
> high-speed drill, except the thread in the back is obscured by a central
> pin and not accessible to measure.
>
> cheers
> Guy




Workshop Practice Series No. 27 "Spndles" by Harprit Sandhu gives the following
dimensions for the Dremel Thread - 0.277" x 40 TPI
On pages 132/133 drawings for the spindle, collet & cap

Regards
Brian


Quick Reply
Message:

Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
hs-81mg thread size for servo horn whirlyspud Electric Plane Talk 3 Aug 29, 2003 08:17 AM
IPD/EPS prop shaft thread size? ScienceGuy Power Systems 3 Aug 29, 2003 06:15 AM
Thread size of GWS shaft? akh223 Parkflyers 1 Apr 02, 2003 12:02 AM
Thread size for Mini Piper wing bolt? Jeff Kelety Parkflyers 2 Jan 05, 2003 11:38 AM
6v 400 mounting hole thread size Al P Electric Plane Talk 16 Jun 06, 2001 12:25 AM