If I was doing it again, I would seriously consider making the stalls of a dimension that whole mats would drop in without cutting. Not that "dropping them in" is particularly easy either. Everything associated with installing those things I consider a PITA, but I also consider them worth the expense and trouble.
My experience with 3/4" horse mat cutting has been pretty much all bad. Cutting with a circular saw and/or a table saw at first glance seems to be the ideal way to hack through those mats. And, with the addition of a little WD40 sprayed on during the process, I did get them cut. BUT - cleaning up the now dull blades was not a minor task.
Using a box blade worked pretty good on notches, but does require several cuts to get all the way through the mat. My jig saw with a course blade running a bit slow seemed to work probably the best. You can figure on throwing away any saw blade that you use though.
Horse mats are really great, but all-in-all, they're a pain to cut to fit. Hopefully you'll give us your final judgement on just which method of cutting worked best for youj.
Rubber mat is 3/4 inch thick. Each piece is 4'x6'. Some will have to be trimmed shorter. Others will have to be notched to go around the stall posts.
One thought is to use a carpet knife.
What about a reciprocating saw? If so what blade? I am thinking for the cuts that have to go the entire length of the mat to chalk a line. Then put a 2x4 under the mat and one over the mat to sandwich it. Use that as a cutting guide and hit it with the saw?
For the cuts around the posts the carpet knife might be needed?
Anyone have any advice?
Use a Jigsaw and these.......
T113A3 | 3 pc. 4 In. Knife Edge Special for Soft Materials T-Shank Jig Saw Blades | Bosch Power Tools
Ed
And water.I've used a razor knife with a straight edge. But only had to work a few pieces. Did the the job but takes several strokes to get through and changing the blade frequently helps.