I bought some 'wood' discs that are about 1" in diameter. I want to
drill a 1/4" or so hole in the middle of the disc. Using a 1" forstner
bit I drilled a depression in a piece of MDF for the disk to sit in. The
disc fits nicely in the depression and I don't have to worry about
holding the disc. I tried drilling the middle hole with a 1/4" bit. The
drill started nicely but then the disc started spinning and burning the
mdf and itself. The disc actually spun onto the bit as the bit was
raised up. The hole was a mess. I tried changing to a 1/4" forstner bit
hoping the outcome would be different but it was the same.
Other than holding the disc still somehow, is there a way to resolve
thie problem? Change the speed of press maybe?
Thomas
I guess I should have included that the thickness of the disc is 1/4" at
the most. I'll try slowing down the press to see if that helps.
Woody wrote:
> Yes, lower the speed and slow down your feed rate during the cut.
> Helps to also withdraw the bit now and then to stop burning and clear any
> chips that may wedge the bit and wood together causing it to catch.
>
>
> --
> Regards,
>
> Dean Bielanowski
> Editor,
> Online Tool Reviews
> http://www.onlinetoolreviews.com
> ------------------------------------------------------------
> Latest 5 Reviews:
> - Ryobi AP13 Planer/Thicknesser
> - BeadLOCK Loose Tenon Joinery System
> - Hyphone Air Tool Kit & Impact Wrench
> - Veritas Basic Grinding Set
> - Book: Making Workbenches
> ------------------------------------------------------------
>
> "Thomas Mitchell" <[email protected]> wrote in message
> news:[email protected]...
>
>>I bought some 'wood' discs that are about 1" in diameter. I want to
>>drill a 1/4" or so hole in the middle of the disc. Using a 1" forstner
>>bit I drilled a depression in a piece of MDF for the disk to sit in. The
>>disc fits nicely in the depression and I don't have to worry about
>>holding the disc. I tried drilling the middle hole with a 1/4" bit. The
>>drill started nicely but then the disc started spinning and burning the
>>mdf and itself. The disc actually spun onto the bit as the bit was
>>raised up. The hole was a mess. I tried changing to a 1/4" forstner bit
>>hoping the outcome would be different but it was the same.
>>
>>Other than holding the disc still somehow, is there a way to resolve
>>thie problem? Change the speed of press maybe?
>>
>>
>>Thomas
>>
>
>
>
Yes that worked really well. Unfortunately the disk still rides up with
the bit so I have to stop the press and take off the disc, but I was
wondering how I was going to get the disc out of the MDF anyway since it
was such a tight fit. I nice clean hole at least.
Woody wrote:
> Yes, lower the speed and slow down your feed rate during the cut.
> Helps to also withdraw the bit now and then to stop burning and clear any
> chips that may wedge the bit and wood together causing it to catch.
>
>
> --
> Regards,
>
> Dean Bielanowski
> Editor,
> Online Tool Reviews
> http://www.onlinetoolreviews.com
> ------------------------------------------------------------
> Latest 5 Reviews:
> - Ryobi AP13 Planer/Thicknesser
> - BeadLOCK Loose Tenon Joinery System
> - Hyphone Air Tool Kit & Impact Wrench
> - Veritas Basic Grinding Set
> - Book: Making Workbenches
> ------------------------------------------------------------
>
> "Thomas Mitchell" <[email protected]> wrote in message
> news:[email protected]...
>
>>I bought some 'wood' discs that are about 1" in diameter. I want to
>>drill a 1/4" or so hole in the middle of the disc. Using a 1" forstner
>>bit I drilled a depression in a piece of MDF for the disk to sit in. The
>>disc fits nicely in the depression and I don't have to worry about
>>holding the disc. I tried drilling the middle hole with a 1/4" bit. The
>>drill started nicely but then the disc started spinning and burning the
>>mdf and itself. The disc actually spun onto the bit as the bit was
>>raised up. The hole was a mess. I tried changing to a 1/4" forstner bit
>>hoping the outcome would be different but it was the same.
>>
>>Other than holding the disc still somehow, is there a way to resolve
>>thie problem? Change the speed of press maybe?
>>
>>
>>Thomas
>>
>
>
>
One of the reasons for the hole was that I could easily find the center
point of the disc. Drill the hole with the forstner bit, change bit and
the hole is centered in the disc. Not sure if I could set up the
centering very accurate without the hole, but I'll give it a try.
George wrote:
> Doublestick tape, no hole.
>
> "Thomas Mitchell" <[email protected]> wrote in message
> news:[email protected]...
>
>>Yes that worked really well. Unfortunately the disk still rides up with
>>the bit so I have to stop the press and take off the disc, but I was
>>wondering how I was going to get the disc out of the MDF anyway since it
>>was such a tight fit. I nice clean hole at least.
>
>
>
Yep, that's similar to the idea I had as well. I was just going to use
some sort of a tong device, but your idea would work as well.
KS wrote:
> In article <[email protected]>, [email protected] says...
>
>>Yes that worked really well. Unfortunately the disk still rides up with
>>the bit so I have to stop the press and take off the disc, but I was
>>wondering how I was going to get the disc out of the MDF anyway since it
>>was such a tight fit. I nice clean hole at least.
>>
>
> How about drilling a hole in another board slightly smaller than the
> disk. Then use that board on top of the disk to hold it down in the mdf
> that your using now. Maybe?
Yes, lower the speed and slow down your feed rate during the cut.
Helps to also withdraw the bit now and then to stop burning and clear any
chips that may wedge the bit and wood together causing it to catch.
--
Regards,
Dean Bielanowski
Editor,
Online Tool Reviews
http://www.onlinetoolreviews.com
------------------------------------------------------------
Latest 5 Reviews:
- Ryobi AP13 Planer/Thicknesser
- BeadLOCK Loose Tenon Joinery System
- Hyphone Air Tool Kit & Impact Wrench
- Veritas Basic Grinding Set
- Book: Making Workbenches
------------------------------------------------------------
"Thomas Mitchell" <[email protected]> wrote in message
news:[email protected]...
> I bought some 'wood' discs that are about 1" in diameter. I want to
> drill a 1/4" or so hole in the middle of the disc. Using a 1" forstner
> bit I drilled a depression in a piece of MDF for the disk to sit in. The
> disc fits nicely in the depression and I don't have to worry about
> holding the disc. I tried drilling the middle hole with a 1/4" bit. The
> drill started nicely but then the disc started spinning and burning the
> mdf and itself. The disc actually spun onto the bit as the bit was
> raised up. The hole was a mess. I tried changing to a 1/4" forstner bit
> hoping the outcome would be different but it was the same.
>
> Other than holding the disc still somehow, is there a way to resolve
> thie problem? Change the speed of press maybe?
>
>
> Thomas
>
Doublestick tape, no hole.
"Thomas Mitchell" <[email protected]> wrote in message
news:[email protected]...
> Yes that worked really well. Unfortunately the disk still rides up with
> the bit so I have to stop the press and take off the disc, but I was
> wondering how I was going to get the disc out of the MDF anyway since it
> was such a tight fit. I nice clean hole at least.
Here is how I do it [making wheels for toys]. Drill a 1" hole in a 2" wide
board about 16" long. Then cut a thin kerf from the long end into the hole
you have drilled. Now, insert the disk into the hole and put one that you
have already drilled on top of it. Squeeze the handle to hold the disks
from spinning and drill through the center hole. I have made them in
several sizes and they work for me. harrym
"Thomas Mitchell" <[email protected]> wrote in message
news:[email protected]...
> I bought some 'wood' discs that are about 1" in diameter. I want to
> drill a 1/4" or so hole in the middle of the disc. Using a 1" forstner
> bit I drilled a depression in a piece of MDF for the disk to sit in. The
> disc fits nicely in the depression and I don't have to worry about
> holding the disc. I tried drilling the middle hole with a 1/4" bit. The
> drill started nicely but then the disc started spinning and burning the
> mdf and itself. The disc actually spun onto the bit as the bit was
> raised up. The hole was a mess. I tried changing to a 1/4" forstner bit
> hoping the outcome would be different but it was the same.
>
> Other than holding the disc still somehow, is there a way to resolve
> thie problem? Change the speed of press maybe?
>
>
> Thomas
>