GregD
Member
With so many pen kits available, what are the most common drill bits used? 7mm 8mm 10mm and ?????????????
Most Common Drill Bits
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pen-turners
Member
The majority of my pen kits use 7mm, 10mm and 3/8. There are many other kits that use other sizes but for the more common kits these are what are used.
Chris
Chris
Gary
Member
Most common for me are 15/32 and 25/64
daledut
Member
All of my commonly made kits can be done with 7mm, 8mm, and 10mm. However I use "J", "O", and "X" since they are slightly larger than the metric. Makes it easier to get the tubes in when gluing. I also use PU glue that expands. Works for me.
Fred in NC
Member
7, 8, and 10mm and 3/8".
woodscavenger
Member
Where do you find a cheap 17/32 for the Gentlemans pen...?
Gary
Member
I don't know what you consider "cheap", but I got mine from BB. They are high quality, and that's what I look for.
jimr
Member
Speaking of bits. I just got some kits and bits from BB in Ariz. and the biggest bit is 15/32. That is a big bit. I have never used one that large in a pen. It is a very high quality twist bit. I am having a problem gettting it started into a blank dead centered. It always moves a little. sometimes this can get dangerously close to the edge of the blank, even with 13/16 blanks. It drills extremely true, even in cocobolo. How do you guys make sure the bit starts cutting exactly in the center? Or do this kits just require extra size blanks.
Gary
Member
It can definately be a problem. I try to go extremely slow when starting to drill. Just barely "kiss" the surface of the wood and give the bit time to get started. Any quick early pressure and the bit will often start off center. At least that's been my experience. And I like to use 7/8" blanks if possible for those big bits.
The only tricks I know of are a steady drilling jig of your choice and a truly square drill press table. Go slow, nibbling your way through. I've made several Barons, which use the 15/32" bit out of 5/8" blanks, but I hold my breath a bit.
GregD
Member
Just a suggestion, once you have found the center, center punch it.The bit will follow into the small hole created by the punch and not walk off to one side or the other.
Gary
Member
Duh!Why didn't I think of that[:0]
Fred in NC
Member
Center punch, or even center drill it. A short drill of smaller diameter, say 1/8", will make a good pilot hole. Short drills are easy to make by the way ....
KKingery
Member
I agree with Fred and GregD - I always mark the blank center point, then I use a center punch to dimple that spot. That usually works everytime!
wdcav1952
Activities Manager Emeritus
Wow, Lou, you must have sworn off caffeine! If I tried to drill a 5/8" blank with a 15/32" drill, instead of holding my breath, I would be out of breath from using some of the words I learned in the Navy![:0]
jwoodwright
Member
This is why I go with the B&D Bullet Bits. Even using 3/8 holes I start with a bullet. Just Break the surface.
Learned the hard way...[
] Drilled through with a 9/32 bullet and then used a 3/8 to finish, still looking for pieces...[xx(]
Learned the hard way...[
] Drilled through with a 9/32 bullet and then used a 3/8 to finish, still looking for pieces...[xx(]jimr
Member
I think I just need to go as slow as possible when the bit touches the wood. I have tried center punching and a smaller bit at first. On the large twist bit the angle of the point is so large it doesnt' want to seat perfectly true. But at least I now know that I am not the only one who has had this problem. Thanks for the tips.
Fred in NC
Member
A center drill is good for this use. It is a short drill with a smaller drill at the end that will not wander. A set of 5 is about $5. Pic at:
http://www.littlemachineshop.com/products/product_view.php?ProductID=1230
The largest is 5/16, which will center even the larger drills we
use.
http://www.littlemachineshop.com/products/product_view.php?ProductID=1230
The largest is 5/16, which will center even the larger drills we
use.
Gary
Member
Thanks Fred, I think I will get a set of those.
Rifleman1776
Member
When I started with pens, I found most of my blanks off center at the bottom. I tried a number of things to fix this. Then I got smart and double checked the square of my table with the spindle, it was off by a tiny amount. Not enough to notice with larger work but on pen blanks it was a whole whoop. I bought a cross-slide machinists drill press vice and now use that to precisely center the blank under the bit, a good investment and I can use it for other things. I like brad point bits and slow speed. I have had good luck buyng import tools from a local store that sells stuff really cheap. [8D] For other drilling with standard bits, I got a Drill Doctor from Santa Claus two years ago and love it. Nothing like a sharp drill to do the job properly. Slow speed, sharp drill, hold tight and square. And back out frequently to clear chips, do not let the work overheat. I do a lot of duck calls and use a 3/4" bit for those. Drilling into end grain of hardwoods with a bit that large produces a lot of heat. [}
] I learned the hard way after blowing several that going slow is much better than forcing the issue.
] I learned the hard way after blowing several that going slow is much better than forcing the issue.GregD
Member
Back to the original question of this thread which is, Most common drill bits. We have 7mm, 8mm, 10mm,3/8", 15/32", 17/32,J,O,and x. Are there any others?
Fleabit
Member
Going cheap on drill bits will cause you more problems than you want. Spend the money on good drill bits and they will last you a long time and be worth the cost.
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