How hard is it to replace an interior door frame and keep the door?

[Ralf11]

I have an interior door with painted frame and trim.

I want to keep the hollow core door, but put new trim up and a new frame - all of it stained natural wood.

I'm thinking I could use the painted frame as a template to cut the stained wood for mortises, etc.

This is a door to a bedroom.

and... I do not own a table saw, even a contractor type, just a chop saw...

 

[The Cobbler]

like everything it's easy to do , if you know what you're doing .and it's one of those things thats easier to show than to explain in words
measure the width of the door at the top ( head) , add 1/8 to 3/16" to that measurement for your head jamb length and cut that
measure the inside length of the side jambs, add the thickness of your jamb material & cut them
measure down to your top hinge and locate that on your hinge jamb. mortise it out for your hinge . measure to the next hinge, repeat . assemble your jamb, install in opening with hinge side flush & plumb to the wall . hang door on hinges. I find easier to install only 1 screw in the bottom hinge a bit loose helps to align . install all hinge screws. gently close door and alight top jamb so you have a nice even gap across. shim latch side to have a nice even gap along. secure jambs in place. mark the center-line of your latch on jamb, mortise for strike plate & install it. make sure door latches nicely.
install door stop, leaving a bit of space along the top & hinge side from the door, and a bit less on the latch side.

 

[Leaflessshadetree]

If you can buy wood the proper width a table saw isn't of any use. A router and jig is very useful for hinges.

 

[driftpin]

Not an expert finish carpenter, but while I've hung many doors both interior and exterior, and made my own exterior doors and frames from scratch, I'm too-slow to be worthwhile on a crew.

I never used those jigs for hinges, not-even a **** gauge. I learned 45 years ago, using a 16 oz claw hammer and a couple of Stanley chisels, how to do the mortises for the hinges and striker plate/latch.

Awhile ago, I got an oscillating tool, not a Freund, just a cheap Harbor Freight, and it's replaced my use of hand chisels to do mortises. It's pretty-accurate, and quick. Mark the lines for the hinges, and cut inside the line ('leave the line') w/the oscillating tool, and then I use a router w/a ~1/2" flat-bottom bit. I still use a hand chisel for a bit of shaving if it needs it, or to square-out the corners.

Take your time, think before you make your cut. The Cobbler gave you good advice.

 

[Ralf11]

If you can buy wood the proper width a table saw isn't of any use. A router and jig is very useful for hinges.

one of the problems is trying to buy that narrow strip of wood that acts to stop the door as it swings

 

[The Cobbler]

any lumber yard should have " door stop" in sets ; 2pcs7' and 1 pc 3'

 

[dogdog]

one of the problems is trying to buy that narrow strip of wood that acts to stop the door as it swings

your local lumber yard have plenty of trims for your choosing... heck you can even route your own. It's nothing special... If you want to re-use the door.. it's pretty simple to do. watch a few youtube videos and see what you have to do better picture then any one can explain it. It's basically treated as if you just buy a door slab and install it.

The door level/plumb

But the major problem is getting the hinges thing routed to match

the door lock things to match..