Useful Trick

Printable View

Jan 8, 2020, 09:37 AM
kess

10 Attachment(s)

Useful Trick

An easy and useful trick when some times the standard numbers of drill bits (In my case Ø16 & Ø16.5mm) isn't suitable for our needs and the price of midrange numbers is too expensive to bay one and perhaps for only one time use.
I have use an Ø6mm aluminum pipe (because it was at front of me),
but a piece of an Ø6mm steel rod it is a better choice with longer life.
At the middle of the one edge I make a cut using my grinder with a cutting disk 1mm.
Then I passed through a strip of emery-cloth Num-150 and wrapped anticlockwise.

https://youtu.be/-Qd0ZPqxhII

Attachment 33016 Attachment 33018

Attachment 33019 Attachment 33021

Attachment 33022 Attachment 33023

Attachment 33024 Attachment 33026

Attachment 33027 Attachment 33028
Jan 8, 2020, 02:24 PM
DIYer


Thanks kess! We've added your Off Size Drillling Method to our Drilling and Drill Presses category,
as well as to your builder page: kess's Homemade Tools. Your receipt:

<div id="blocks"> <div class="block b1 pngfix"> <div class="bimg"> <div> <a href="https://www.homemadetools.net/homemade-off-size-drillling-method"> <img src="/uploads/228950/homemade-off-size-drillling-method.jpeg"/> </a> </div> </div> <div class="head pngfix"></div> <div class="left pngfix"></div> <div class="right pngfix"></div> <div class="blockover b1 pngfix"> <div class="title"> <a href="https://www.homemadetools.net/homemade-off-size-drillling-method">Off Size Drillling Method</a> <span> by <a href="https://www.homemadetools.net/builder/kess">kess</a></span> </div> <div class="tags">tags: <a href='https://www.homemadetools.net/tag/drilling'>drilling</a> </div> </div> </div> </div>
Jan 8, 2020, 05:54 PM
piloon

I call that a DIY reamer!
Jan 12, 2020, 04:57 AM
Toolmaker51

This is operation is known as honing. The results are suitable for a low speed shaft/ bushing combination.
An improvement would increase the rod diameter [wood dowel is fine] so only 1 or 2 wraps encircle the rod [mandrel], delivering more pressure to the diameter being worked. That also reduces misalignment to bore. Use cutting oil, the mandrel will do admirable job chucked in a drill press.
The fastest cutting is RPM producing 45° grind lay while stroking straight axis forward and back, without letting the paper bell-mouth entry or exit.
Jan 12, 2020, 07:10 AM
kess

Quote:

Originally Posted by Toolmaker51

This is operation is known as honing. The results are suitable for a low speed shaft/ bushing combination.
An improvement would increase the rod diameter [wood dowel is fine] so only 1 or 2 wraps encircle the rod [mandrel], delivering more pressure to the diameter being worked. That also reduces misalignment to bore. Use cutting oil, the mandrel will do admirable job chucked in a drill press.
The fastest cutting is RPM producing 45° grind lay while stroking straight axis forward and back, without letting the paper bell-mouth entry or exit.

Hi Toolmaker51,
Thanks for your advice; I will try it for sure.
Jan 12, 2020, 07:25 AM
Toolmaker51

That's why we all come here! I don't try to be a know it all, while dispensing conditions encountered.
Been a l-o-n-g time since I worked in a shop that had everything. Owner retired, I collected just a bit of the equipment, but recall so many of the jobs and how tricky things were solved. No one could even spell CAD, EDM, barely CNC yet.
Jan 12, 2020, 05:19 PM
ranald

For many years, I used that method with wooden dowels, mostly in a drill press & didn't really think of using the method on steel. Looking beyond the box but I have a large range of bits but very useful all the same.
Thanks for posting.