Getting Started with Template Jigs
Most people buy into these systems because they want consistency without hand-fitting every single piece. That's fair. I've used them for years. The core idea is straightforward: you cut a template from something stable, then run a flush-trim bit along it to copy that shape exactly onto your workpiece. The bearing on the bit follows the template while the cutter removes whatever's sticking out past it. What most guides don't tell you is that the template material matters way more than people expect. Cheap MDF swells with glue and dust. It wears down after twenty passes and your edges start drifting out of tolerance. I switched to 1/4 inch ABS plastic sheeting a while back, and my templates have lasted for actual projects now. They cost more upfront but they cut cleanly, don't absorb moisture, and hold a straight edge for dozens of routings.
Woodworking Template Quick Techniques
Here's the basic workflow. You trace your shape onto the template material, cut it out with a jigsaw or CNC, and sand the edges smooth. Then you glue or tape it to your workpiece. The key detail most beginners skip is leaving about 1/8 inch of margin between the template edge and the workpiece edge. If the template is flush with the workpiece perimeter, the bearing doesn't have a flat surface to ride on and the whole thing jumps around. You need that overlap so the bearing can track properly. Glue choice matters too. Spray adhesive gives you repositionability but can slip during routing if your feed rate is aggressive. Double-sided tape is faster but you need to make sure you're not creating ridges under the template. I use 3M Super 77 spray and apply it thin and even. One light coat on each surface, wait thirty seconds, then press down. The bond is strong enough for routing but the template peels off cleanly when you're done without residue. I ran into a specific issue last year with a Walnut cabinet door I was routing. The grain was running diagonally across the panel, and as I was finishing the routing pass, the template started lifting at one corner. The bearing had found a tiny high spot where the grain had raised during the routing heat. I stopped, popped the template back off, and ran a card scraper across the workpiece surface to knock down any fuzz or raised grain. Reattached and finished clean. That scraping step takes about ten seconds and saved me from ruining the piece.
The bit selection is where things get less obvious. A standard flush-trim bit with a 3/8 inch bearing will work for most jobs, but the bearing size limits your template thickness. If your template is thicker than your bearing radius, the bearing rides on the template surface instead of the edge and you lose accuracy. I keep two sizes on hand: a 3/8 bearing bit for 1/4 inch templates and a 1/2 bearing bit when I'm working with thicker stock or larger panels. The larger bearing also dampens vibration a bit more, which shows up if you're routing long continuous edges. There's a common misconception that you should rout in the direction the bit wants to go. The truth is more nuanced. For external contours, climb routing is actually safer and gives a cleaner edge because the bit is pulling away from the material rather than pushing into it. For internal cutouts, conventional routing is the way to go. Going either way on internal profiles tends to tear the fibers on the exit side. If you're doing both, just switch your feed direction between the two rather than trying to force one method everywhere.
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When This Approach Fails
Template routing isn't universal. If you're working with very thick material relative to the template, the bit might not reach deep enough without using extension bits, and those introduce runout issues. I've seen extensions wobble enough to cause visible step marks at the template junction after a deep cut. If you need more than an inch of plunge depth, it's usually better to break it into two passes at different settings rather than fighting the deflection. Another hard limitation: template routing only copies existing geometry. If your design requires compound angles or freeform shapes that aren't defined by a flat pattern, this method won't help. You still need hand skills or a CNC for that stuff. I learned that the hard way trying to template a complex chair crest rail and ending up with a mess of uneven curves. Went back to band saw and spindle sander for that project. Cost-wise, a decent router template kit runs around eighty to one hundred fifty dollars depending on what's included. Bits alone are twenty to forty bucks each. The template material is cheap. You're really paying for the router bits and the guidance system. If you're only doing a couple of projects, buying a couple of individual flush-trim bits and making your own templates from scrap plastic or laminate might be more economical than a full kit that includes a lot of plastic guide bushings you'll never use.
The main takeaway is that template routing works well when your parts share repeated shapes. Joinery layouts, panel profiles, edge details that show up on multiple pieces. It's where the time savings actually add up. For one-off custom work, the setup time often exceeds the time you'd save compared to careful hand routing or saw cutting. I use templates for everything in production because I'm making the same drawer front profile five or six times per job. Doing that by eye every time would be slower and less consistent anyway.
