What Actually Goes Into a Shop Template System
I built my first wooden template about twelve years ago when I was trying to cut a bunch of identical cabinet doors and kept ending up with pieces that were off by half a millimeter. That kind of error adds up fast when you are working with expensive walnut. Since then I have made dozens of them, some worked great, most were slightly annoying, and a few ended up in the scrap bin after a week. The Survival Guide For Woodworking Template I ended up relying on the most was never something I bought off a shelf. It was a collection of habits and a few physical jigs I made along the way. The core idea is simple enough. You create a rigid guide that controls the path of your router bit or saw blade so every repeated cut comes out the same way. The material you use matters more than people think. MDF is the standard choice for a reason. It holds screws well, planes flat, and is cheap enough to replace when you mess up. But MDF absorbs moisture from the air and swells. If your shop does not have climate control, you will notice your templates drifting by a fraction over the course of a humid summer. Baltic birch plywood is a better choice in that environment. It is denser and more dimensionally stable. Plywood does split if you overtighten screws near the edge, so use washers and pre-drill everything. Here is how I actually build one now, after burning through so many failed attempts. Start by cutting the template shape from scrap on the table saw. Use a fresh carbide blade and take the cut in two passes if the stock is thicker than three quarters of an inch. A single pass through thick material leaves a slight shoulder on the edge that will show up later as a tear-out problem. Once the blank is cut, clean the edges with a card scraper. Do not skip this step. Sandpaper rounds the corner microscopically, and that rounding transfers directly to your workpiece as a tiny radius instead of the sharp edge you want. A sharp card scraper leaves a glass-smooth surface that the router bearing can track against without vibration.
The next step is attaching the template to the workpiece. This is where most people go wrong. They clamp the template down and hope it stays still. It will not. Use a combination of clamps and doublesided tape, or better yet, make a couple of spacer blocks that sit between the clamp jaw and the template. The spacers raise the clamp pressure point above the template surface so you are not compressing the wood underneath the guide and shifting its position. I learned this the hard way when I was routing dados for a set of bookshelf carcasses. The template slid about a sixteenth of an inch during the cut because the clamp was pressing down at an angle through the MDF. All ten shelves ended up with slightly misaligned dados. I had to shim the joints and pray nobody noticed. For the router setup, use a pattern bit or a bearing-guided flush trim bit. The bearing should match the diameter of the template material. If your template is three quarters of an inch thick, use a three quarter inch bearing. Any mismatch creates a cumulative error. I once used a seven eighths bearing on a three quarter template and spent an afternoon trying to figure out why every door panel was a sixteenth too narrow. The bearing was riding on the high side of the template edge and cutting outside the intended line. Check your bearing size before you start every single project. It takes three seconds and saves you from having to rebuild a finished cabinet. One thing I wish someone had told me early on: routing direction matters more than the bit type. When you rout with the grain, lift cuts are cleaner. When you rout against the grain, you get tear-out on the far edge. If your template has an internal cutout like a handle recess, route in multiple shallow passes rather than one deep pass. A quarter inch per pass minimum. Going deeper than that pushes the bit, deflects the template, and widens your cut. With a 3/4" MDF template and a 1/2" bit, two passes at an eighth inch depth gives you a clean wall every time. Three passes and you are just wasting router life.
Edge Cases That Ruin Templates
Here is a problem that took me two years to properly solve. Routing around a curved pocket inside a template. I was making a series of curved drawer fronts and needed a template to guide the radius on the top edge. Standard practice is to rout the curve with a straight bit and then hand sand the transition. But the transition was never smooth. There was always a flat spot where the straight bit could not reach into the corner. I tried using a smaller pilot bearing, a larger bearing, a flexible shaft grinder. Nothing worked cleanly. The fix was actually much simpler than I expected. I switched to a router table with a pattern bit and routed the template curve in reverse. Instead of holding the router in my hand and pushing it around the inside of the curve, I placed the template on the router table fence, clamped it down, and fed it past the bit from the outside. This let me use a full radius bit that followed the curve perfectly. The transition from straight to curve came out smooth with no sanding required. It sounds backwards, but routing from the outside of a curve with a table setup removes the variable of your hand moving unevenly. Hand routing always has micro-stutters. A table fence does not. Another issue that comes up constantly: template wear. Every time you run a router against the edge, the bearing drags a tiny groove into the MDF or plywood. After fifty or sixty cuts, that groove becomes wide enough to change the cut dimension. I stopped fighting this and started accepting it. I keep a caliper and measure the template opening every twenty or thirty uses. When the bearing path is worn past a thousandth of an inch, I either flip the template to a fresh unused edge or make a new one. You can rotate an MDF template roughly four times before you run out of good edge. Mark each edge with a marker so you know which side is still clean.
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When Templates Are Not the Right Answer
There are situations where a custom template is more work than it is worth. If you are making one-off brackets for a repair job, skip the template and use a combination square with a pencil. If you need five identical pieces and your saw has a reliable fence, cut them freehand against the fence. The time savings from building a template only appear after about eight to ten identical parts, depending on how complex the cut is. A straight rip template might take twenty minutes to build and save you five minutes per cut. That break-even point is around four pieces. A complex routed panel template might take an hour to make and save you fifteen minutes per piece. You need at least four pieces there too, but the math gets fuzzy if you factor in cleanup time. Jigless joinery methods like domino or biscuit joiners have largely replaced template-based mortise cutting for many people. If you are building face frame cabinets and need consistent hinge cups, a purchased hinge drilling jig is faster and more accurate than anything you can route from a template. I stopped making my own hinge cup templates about five years ago. The Rockler and Kreg jigs do it faster and cost less than the time I spent building, breaking, and rebuilding my own versions. Not every problem needs a wooden template. Sometimes the best template is the one you do not make. The Survival Guide For Woodworking Template I would actually hand to someone starting out would not be a document. It would be a single sheet of paper with three rules written on it. Pre-drill every screw. Clean the template edge with a scraper before attaching. Measure the bearing diameter before every cut. Everything else is detail that you learn by making mistakes and replacing material. I have replaced more expensive hardwood than I care to admit because I skipped one of those three steps. The rest of the process is just repetition until your hands remember what your brain keeps forgetting.
