you can buy hinge jigs or make your own or even free hand with a router,then with a corner chisel remove the excess,thats if your doing a lot of door hanging,or why not try the old fashion method of using a hammer and chisel.
If you've got a lot to do then it's worth the trouble to set up a router (and a template, if you want to buy or make one); you'll still need to finish the corners with a chisel.
If you're doing only one door it can be quicker to use a good sharp chisel; scribing the edges, and checking the depth as you go.
I've used router and jig and it works very well. Only be very careful and sure footed - ideally 2 people, 1 to hold door. I have replaced all internal doors like this with oak doors so I was worried about making a mistake and damaging expensive doors. A bit care and attention and a perfect job. I'm no joiner but quite experienced DIYer.
Router is very dangerous so be very careful and take your time.
Test first on an old door - I did to get the feel of it.
If you are in the trade like me and hang multiple doors a year, I would defo buy a Hinge jig, quick and easy to use if you don't lose the hinge template guide but they are pricey, bought a new one from Trend recently and it set me back 175 notes, but I will recoup that cost after 4-5 doors .... if you intend to hang 10 doors and thats it use the old fashion method of hammer and chisel or construct your own router template as previously mentioned.
Leeco is correct be careful with a router its pretty dangerous kit to a novice, I use a couple door clamps for my work... best invention ever yet so simple wish I had thought of it!
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