# N-Filter Hole Drilling Template (Fixed Broken Links) **URL:** \ **Category:** Tutorials & Guides\ **Created:** [July 1, 2012, 1:25pm UTC](https://forum.gbfans.com/t/n-filter-hole-drilling-template-fixed-broken-links/29232 "2012-07-01T13:25:52Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![namssorg](https://forum.gbfans.com/user_avatar/forum.gbfans.com/namssorg/32/3980_2.png) [@namssorg](https://forum.gbfans.com/u/namssorg)\ **Post date:** [July 1, 2012, 1:25pm UTC](https://forum.gbfans.com/t/n-filter-hole-drilling-template-fixed-broken-links/29232/1 "2012-07-01T13:25:52Z")
Here is a template for drilling evenly spaced holes for your [N-Filter](https://www.gbfans.com/wiki/equipment/proton-pack/n-filter). I posted this in [my pack build](http://www.gbfans.com/community/viewtopic.php?f=2&t=27016&start=90#p397948) awhile ago and it seemed to be popular, so I wanted to make it easier to find. If you’re building a plastic N-filter, I link to the tubing I used for mine on that thread. Print the template at 1:1 scale (don’t fit-to-page) and cut along the outside. I’ve left some overlap in the template so that you can tape one end to your tubing. Wrap the template around the outside, and then tape the other end down. Make sure you drill small pilot holes in the center of each circle first. Then go back and drill your 1/2" holes. There are two templates, depending on the size of your N-Filter. If there is another common size, let me know and I will add a template for it. N-Filter Drill Templates v 1.0: **[3" Outer Diameter tube template [download]](https://drive.google.com/open?id=0B6FuFzdCn-NrNVBDUFpZaEthcE0)** **[2.75" Outer Diameter tube template [download]](https://drive.google.com/open?id=0B6FuFzdCn-NrRzZwb09FSkNxOXM)** Hope these help! Namssorg ![image](https://discdn.gbfans.com/original/3X/b/a/ba6f0171ff7f34983e1016c625d5b81ec404e86a.jpeg) ![image](https://discdn.gbfans.com/original/3X/4/2/42672e970eadcf33006e6520bb3bad9276c7f701.jpeg) ![image](https://discdn.gbfans.com/original/3X/a/a/aaba2a0fe4c0c48197d89c44fb4c93c1db4ed861.jpeg) ---
**Author:** ![sr20det85](https://forum.gbfans.com/user_avatar/forum.gbfans.com/sr20det85/32/5853_2.png) [@sr20det85](https://forum.gbfans.com/u/sr20det85)\ **Post date:** [July 3, 2012, 10:01pm UTC](https://forum.gbfans.com/t/n-filter-hole-drilling-template-fixed-broken-links/29232/2 "2012-07-03T22:01:40Z")
very nice ---
**Author:** ![holymattbone](https://forum.gbfans.com/letter_avatar_proxy/v4/letter/h/7feea3/32.png) [@holymattbone](https://forum.gbfans.com/u/holymattbone)\ **Post date:** [July 10, 2012, 8:05pm UTC](https://forum.gbfans.com/t/n-filter-hole-drilling-template-fixed-broken-links/29232/3 "2012-07-10T20:05:35Z")
the holes are equidistant or two holes are closer like on minnesota [proton pack](https://www.gbfans.com/wiki/equipment/proton-pack)? ---
**Author:** ![namssorg](https://forum.gbfans.com/user_avatar/forum.gbfans.com/namssorg/32/3980_2.png) [@namssorg](https://forum.gbfans.com/u/namssorg)\ **Post date:** [July 10, 2012, 8:54pm UTC](https://forum.gbfans.com/t/n-filter-hole-drilling-template-fixed-broken-links/29232/4 "2012-07-10T20:54:43Z")
The holes are equidistant on the templates. If you want to make two holes closer together (and the rest equal) you could always print the template out a little larger, so it overlaps itself just a little bit more. ---
**Author:** ![ajbernard](https://forum.gbfans.com/letter_avatar_proxy/v4/letter/a/8e7dd6/32.png) [@ajbernard](https://forum.gbfans.com/u/ajbernard)\ **Post date:** [July 14, 2012, 8:09pm UTC](https://forum.gbfans.com/t/n-filter-hole-drilling-template-fixed-broken-links/29232/5 "2012-07-14T20:09:31Z")
Hey Thanks for doing this its a big help! ---
**Author:** ![Creativeguy](https://forum.gbfans.com/letter_avatar_proxy/v4/letter/c/e47774/32.png) [@Creativeguy](https://forum.gbfans.com/u/Creativeguy)\ **Post date:** [August 12, 2012, 11:54am UTC](https://forum.gbfans.com/t/n-filter-hole-drilling-template-fixed-broken-links/29232/6 "2012-08-12T11:54:53Z")
Nice work! Thanks for making this! ---
**Author:** ![TheBigGuy](https://forum.gbfans.com/letter_avatar_proxy/v4/letter/t/958977/32.png) [@TheBigGuy](https://forum.gbfans.com/u/TheBigGuy)\ **Post date:** [August 21, 2012, 2:01am UTC](https://forum.gbfans.com/t/n-filter-hole-drilling-template-fixed-broken-links/29232/7 "2012-08-21T02:01:39Z")
Used your template to drill my [N-filter](https://www.gbfans.com/wiki/equipment/proton-pack/n-filter) holes today. It was one of those times when it was just so nice to not even have to think about figuring out measurements! Thanks a lot Namssorg! ![image](http://www.boonelangston.com/PackBuild/PACK13.jpg) ---
**Author:** ![namssorg](https://forum.gbfans.com/user_avatar/forum.gbfans.com/namssorg/32/3980_2.png) [@namssorg](https://forum.gbfans.com/u/namssorg)\ **Post date:** [August 21, 2012, 2:30am UTC](https://forum.gbfans.com/t/n-filter-hole-drilling-template-fixed-broken-links/29232/8 "2012-08-21T02:30:41Z")
Great to see some in-progress pictures of these things being used. Glad they are coming in handy. ---
**Author:** ![Nboucher2392](https://forum.gbfans.com/letter_avatar_proxy/v4/letter/n/8e7dd6/32.png) [@Nboucher2392](https://forum.gbfans.com/u/Nboucher2392)\ **Post date:** [April 9, 2013, 12:36am UTC](https://forum.gbfans.com/t/n-filter-hole-drilling-template-fixed-broken-links/29232/9 "2013-04-09T00:36:19Z")
I just used these templates in starting my n filter. The really helped getting the positions right. ---
**Author:** ![languages](https://forum.gbfans.com/letter_avatar_proxy/v4/letter/l/b3f665/32.png) [@languages](https://forum.gbfans.com/u/languages)\ **Post date:** [June 5, 2013, 7:13pm UTC](https://forum.gbfans.com/t/n-filter-hole-drilling-template-fixed-broken-links/29232/10 "2013-06-05T19:13:48Z")
Nice thread. I’m wondering: Why the people always remove the [N-Filter](https://www.gbfans.com/wiki/equipment/proton-pack/n-filter)? Is there a specific reason for that? ---
**Author:** ![namssorg](https://forum.gbfans.com/user_avatar/forum.gbfans.com/namssorg/32/3980_2.png) [@namssorg](https://forum.gbfans.com/u/namssorg)\ **Post date:** [June 5, 2013, 10:20pm UTC](https://forum.gbfans.com/t/n-filter-hole-drilling-template-fixed-broken-links/29232/11 "2013-06-05T22:20:33Z")
There are a few reasons. Sometimes people just want to replace it with a metal [N-filter](https://www.gbfans.com/wiki/equipment/proton-pack/n-filter). Some of us have older shells built before the exact dimensions and placement of the N-filter were available, and some of us have shells that do not include an N-filter at all. In my case, I just didn’t like the N-filter that came with my Shell. It was sightly too small, and didn’t look like I wanted it to, so I built my own! ---
**Author:** ![languages](https://forum.gbfans.com/letter_avatar_proxy/v4/letter/l/b3f665/32.png) [@languages](https://forum.gbfans.com/u/languages)\ **Post date:** [July 2, 2013, 1:54pm UTC](https://forum.gbfans.com/t/n-filter-hole-drilling-template-fixed-broken-links/29232/12 "2013-07-02T13:54:29Z")
There is 2 size here. What is accurate? 3" Outer Diameter tube template OR 2.75" Outer Diameter tube template ---
**Author:** ![languages](https://forum.gbfans.com/letter_avatar_proxy/v4/letter/l/b3f665/32.png) [@languages](https://forum.gbfans.com/u/languages)\ **Post date:** [July 2, 2013, 2:48pm UTC](https://forum.gbfans.com/t/n-filter-hole-drilling-template-fixed-broken-links/29232/13 "2013-07-02T14:48:21Z")
How do you do to put the top on this [N-filter](https://www.gbfans.com/wiki/equipment/proton-pack/n-filter)? ---
**Author:** ![Vincenzo330](https://forum.gbfans.com/letter_avatar_proxy/v4/letter/v/8c91f0/32.png) [@Vincenzo330](https://forum.gbfans.com/u/Vincenzo330)\ **Post date:** [July 3, 2013, 5:16pm UTC](https://forum.gbfans.com/t/n-filter-hole-drilling-template-fixed-broken-links/29232/14 "2013-07-03T17:16:33Z")
> [@languages](#): > > There is 2 size here. What is accurate? > > 3" Outer Diameter tube template > > OR > > 2.75" Outer Diameter tube template 3" OD is the accurate dimension. ---
**Author:** ![stantz](https://forum.gbfans.com/letter_avatar_proxy/v4/letter/s/85e7bf/32.png) [@stantz](https://forum.gbfans.com/u/stantz)\ **Post date:** [June 11, 2014, 10:45am UTC](https://forum.gbfans.com/t/n-filter-hole-drilling-template-fixed-broken-links/29232/15 "2014-06-11T10:45:09Z")
Wow this is great! How do you actually cut the filter to fit onto the cyclo though, would be really helpful if there was a template for this. I know all packs vary slightly but some sort of guide would be awesome 🙂 ---
**Author:** ![namssorg](https://forum.gbfans.com/user_avatar/forum.gbfans.com/namssorg/32/3980_2.png) [@namssorg](https://forum.gbfans.com/u/namssorg)\ **Post date:** [July 30, 2014, 6:16pm UTC](https://forum.gbfans.com/t/n-filter-hole-drilling-template-fixed-broken-links/29232/16 "2014-07-30T18:16:53Z")
That’s a great question. If you have a contour gauge, that would help a little: ![image](http://www.micromark.com/RS/SR/Product/84438_R.jpg) I didn’t have one, so what I did was cut apart a cereal box, and cut out a few rectangles that with the ends taped together, made tubes the same diameter as my [N-filter](https://www.gbfans.com/wiki/equipment/proton-pack/n-filter). Then I just carefully measured and cut out the profile of my [cyclotron](https://www.gbfans.com/wiki/equipment/proton-pack/cyclotron) out of the cardboard. It took some trial and error, but eventually I got a ‘paper’ n-filter that had the right profile of my cut. I wrapped it around my actual N-filter and used it to trace on guides that I used for my cuts. [PssdffJay did something similar in his build.](http://android.gbfans.com/community/viewtopic.php?f=2&t=34784&p=4802054#p4801906) ---
**Author:** ![PssdffJay](https://forum.gbfans.com/user_avatar/forum.gbfans.com/pssdffjay/32/6529_2.png) [@PssdffJay](https://forum.gbfans.com/u/PssdffJay)\ **Post date:** [July 30, 2014, 8:15pm UTC](https://forum.gbfans.com/t/n-filter-hole-drilling-template-fixed-broken-links/29232/17 "2014-07-30T20:15:11Z")
Haha! Don’t blame me! I stole the idea from Julz! ---
**Author:** ![namssorg](https://forum.gbfans.com/user_avatar/forum.gbfans.com/namssorg/32/3980_2.png) [@namssorg](https://forum.gbfans.com/u/namssorg)\ **Post date:** [November 10, 2015, 4:23am UTC](https://forum.gbfans.com/t/n-filter-hole-drilling-template-fixed-broken-links/29232/18 "2015-11-10T04:23:48Z")
Hey guys- Long time! Just wanted to call out that I’ve slightly updated the 3" filter template. I actually did this awhile ago, but forgot to mention it here. The 3" template now has two options- an evenly spaced version, and a “GB1 Movie Spacing” version with two holes closer together, like on the Minnesota pack. The link to the full-size PDF is in the original post on this thread. Thanks to Drjameshouse who provided the measurements and encouraged me to put this together. ![image](https://discdn.gbfans.com/original/3X/4/1/4100897cc7f88888fcb8b212db527bf5c33913ac.png) ---
**Author:** ![propcicle](https://forum.gbfans.com/letter_avatar_proxy/v4/letter/p/dbc845/32.png) [@propcicle](https://forum.gbfans.com/u/propcicle)\ **Post date:** [November 10, 2015, 4:34am UTC](https://forum.gbfans.com/t/n-filter-hole-drilling-template-fixed-broken-links/29232/19 "2015-11-10T04:34:38Z")
Thanks for putting this together. I used your original template to drill a couple N filters a few months ago and this saved me a ton of time. ---
**Author:** ![namssorg](https://forum.gbfans.com/user_avatar/forum.gbfans.com/namssorg/32/3980_2.png) [@namssorg](https://forum.gbfans.com/u/namssorg)\ **Post date:** [July 21, 2017, 3:32am UTC](https://forum.gbfans.com/t/n-filter-hole-drilling-template-fixed-broken-links/29232/20 "2017-07-21T03:32:39Z")
Another minor update- The files have not changed, but the public Dropbox links have stopped working. I’m now hosting these on Google Drive if anyone still needs them! [Next page](https://forum.gbfans.com/t/n-filter-hole-drilling-template-fixed-broken-links/29232.md?page=2)