# How to do mitre cuts using 90\* v-bits **URL:** \ **Category:** Uncategorized\ **Created:** [July 15, 2024, 10:23pm UTC](https://forum.onefinitycnc.com/t/how-to-do-mitre-cuts-using-90-v-bits/27898 "2024-07-15T22:23:15Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![AAF](https://avatars.discourse-cdn.com/v4/letter/a/e47c2d/32.png) [@AAF](https://forum.onefinitycnc.com/u/AAF)\ **Post date:** [July 15, 2024, 10:23pm UTC](https://forum.onefinitycnc.com/t/how-to-do-mitre-cuts-using-90-v-bits/27898/1 "2024-07-15T22:23:15Z")
Hello fellow cnc’rs. Up to this point I’ve used my v-bits to do carvings. Now I need to learn on how to do miter cuts with .25’’ dia bit/s. My wood materials I use are anywhere from 1/2’’ - 1’'. Where I’m struggling is the programming/math calculation part of these cuts. Does anyone has a quick simple explanation/formula on how to approach these cuts? Do I use profile toolpath, or do I need to do area clear-out? I use Carveco maker. I know I can get big diameter bits, but it will not help me with understanding on how to program these with the smaller bit. Thank you, Andre ---
**Author:** ![harsha170](https://avatars.discourse-cdn.com/v4/letter/h/f19dbf/32.png) [@harsha170](https://forum.onefinitycnc.com/u/harsha170)\ **Post date:** [August 1, 2024, 7:23pm UTC](https://forum.onefinitycnc.com/t/how-to-do-mitre-cuts-using-90-v-bits/27898/2 "2024-08-01T19:23:13Z")
I am in the same situation. Please let me know if you figured out any solution. I couldn’t find video’s that go in detail. ---
**Author:** ![SailorMike](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.onefinitycnc.com/sailormike/32/3290_2.png) [@SailorMike](https://forum.onefinitycnc.com/u/SailorMike)\ **Post date:** [August 1, 2024, 11:01pm UTC](https://forum.onefinitycnc.com/t/how-to-do-mitre-cuts-using-90-v-bits/27898/3 "2024-08-01T23:01:01Z")
I don’t use Carveco, but I’ve done it in V-Carve to make the hinged edge of pen boxes. Perhaps there’s some equivalent. I select the edge where I want the miter and create a line offset from it inwards by the thickness of the material, or the desired depth of the miter. I use this line as the rail in the “Chamfer” toolpath. With a 90-degree V-bit, this quickly produces the desired cut. Here’s a couple of simulated pictures. ![bevel 1](https://us1.discourse-cdn.com/flex022/uploads/onefinitycnc/original/3X/7/4/7431daee8ef55b0dea3fc4217f066778e45b60af.jpeg) ![bevel 2](https://us1.discourse-cdn.com/flex022/uploads/onefinitycnc/original/3X/2/3/23dfcb8417c0b6bee7ee57e451fa73f28d63efb3.jpeg) And one of my pen boxes, showing the bevel at the hinge point. ![pen box](https://us1.discourse-cdn.com/flex022/uploads/onefinitycnc/original/3X/9/7/97a2195433806e16c49456876858d859eeaf98fb.jpeg) I hope this is of some help. ---
**Author:** ![AAF](https://avatars.discourse-cdn.com/v4/letter/a/e47c2d/32.png) [@AAF](https://forum.onefinitycnc.com/u/AAF)\ **Post date:** [August 2, 2024, 12:10am UTC](https://forum.onefinitycnc.com/t/how-to-do-mitre-cuts-using-90-v-bits/27898/4 "2024-08-02T00:10:54Z")
@SailorMike How much of offset do you set on .75 thick wood? Tnx Andre ---
**Author:** ![DCK](https://avatars.discourse-cdn.com/v4/letter/d/7bcc69/32.png) [@DCK](https://forum.onefinitycnc.com/u/DCK)\ **Post date:** [August 2, 2024, 12:40am UTC](https://forum.onefinitycnc.com/t/how-to-do-mitre-cuts-using-90-v-bits/27898/5 "2024-08-02T00:40:02Z")
That’s the nice thing about 90 degree v-bits. 45 degrees on both sides of the rotation axis, so your offset will be equivalent to your depth (i.e. .75" offset for .75" material thickness). ---
**Author:** ![AAF](https://avatars.discourse-cdn.com/v4/letter/a/e47c2d/32.png) [@AAF](https://forum.onefinitycnc.com/u/AAF)\ **Post date:** [August 2, 2024, 12:27pm UTC](https://forum.onefinitycnc.com/t/how-to-do-mitre-cuts-using-90-v-bits/27898/6 "2024-08-02T12:27:33Z")
@DCK Thank you Dan, I’ll give it a try. ---
**Author:** ![SailorMike](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.onefinitycnc.com/sailormike/32/3290_2.png) [@SailorMike](https://forum.onefinitycnc.com/u/SailorMike)\ **Post date:** [August 2, 2024, 4:57pm UTC](https://forum.onefinitycnc.com/t/how-to-do-mitre-cuts-using-90-v-bits/27898/7 "2024-08-02T16:57:39Z")
If you don’t have a chamfer tool in your software, you might try offsetting a line to the stock thickness to the outside of your edge and doing a profile cut on that line with the 90-deg V-bit. I haven’t tried that, so try it on a scrap piece first. ---
**Author:** ![Sawdustmaker](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.onefinitycnc.com/sawdustmaker/32/9514_2.png) [@Sawdustmaker](https://forum.onefinitycnc.com/u/Sawdustmaker)\ **Post date:** [August 2, 2024, 9:47pm UTC](https://forum.onefinitycnc.com/t/how-to-do-mitre-cuts-using-90-v-bits/27898/8 "2024-08-02T21:47:52Z")
Hi Andre, have you had a chance to try this? Did it work as expected? Thx Dave