Router Jigs Template vs Flush Trim in 2026: Which Bit and Setup Belongs on Your First Pattern Job

Pattern routing is the single most useful technique for producing repeatable parts in a small shop. Cut one template carefully, then trace it onto 20 workpieces with a flush trim or template bit and the parts come out identical. The two bits look almost the same. They produce the same cut. They are not interchangeable. Mixing them up will either ruin your template, ruin the workpiece, or both. Here is how each one works, when to use which, and how to keep all your fingers attached during the process.

Template bit vs flush trim bit, the core difference

Both bits have a bearing that rolls against a template to control the cut shape. The bearing position is the entire difference.

A flush trim bit (sometimes called bottom-bearing flush trim) has the bearing at the tip of the bit, below the cutting flutes. When you mount it in a handheld router and lower the router onto a workpiece, the flutes cut at the top of the work and the bearing rides against a template that is attached underneath. This is the standard setup for trimming a glued-up panel flush to a substrate, or for cutting parts where the template is screwed to the bottom of an oversized workpiece blank.

A template bit (pattern bit, top-bearing) has the bearing on the shank, above the flutes. The bearing rides on a template that sits on top of the workpiece. The cutters reach down into the workpiece below the template. This is the standard setup when you want to see the template while routing, which most people prefer for shaping curves freehand or routing around a complex pattern.

A flush trim bit costs 18 to 35 dollars in 1/2 inch shank, 2 inch cutting length. A top-bearing template bit costs 22 to 45 dollars in the same size. Both should be solid carbide-tipped (not high-speed steel) for any serious work.

The setup, step by step

The template-routing workflow has six steps regardless of which bit you use:

1. Cut the template carefully. MDF or Baltic birch ply, 3/8 to 1/2 inch thick. Sand the edges smooth because any bump in the template transfers to the workpiece.
2. Rough-cut the workpiece blank to within 1/8 inch of the template on the bandsaw or jigsaw. The router is for finishing, not for hogging out 1/2 inch of waste.
3. Attach the template to the workpiece. Double-sided turner’s tape (about 5 dollars per roll) holds well for the duration of a cut and peels off cleanly. Screws in waste areas work for templates you will reuse 50 plus times.
4. Set the bit depth. For a flush trim bit you want the bearing centered on the template thickness. For a template bit you want the cutter to clear the template and reach the full thickness of the workpiece below.
5. Feed the router against the rotation of the bit. For a handheld router on a top-mounted template, that is left to right when you look down at the bit.
6. Take light passes if the cut is deep. Up to 1/4 inch in softwood, 1/8 inch in hardwood, per pass.

Which one to reach for, scenario by scenario

Use a flush trim bit (bottom bearing) when:

• You are trimming a laminate or veneer overhang flush to a substrate. The substrate is the “template” and the overhang is the work to be removed.
• You are routing a workpiece that is glued to a master template on its bottom face. This is the cabinet-door-shape workflow.
• The template will sit on the router table fence as a guide and the workpiece slides above it.

Use a template bit (top bearing) when:

• You are tracing a template onto a thick workpiece blank and want to see the template as you route.
• You are routing complex curves freehand where visibility matters more than anything else.
• The template is too small to support the router base (rare, but it happens with small parts).

For about 80 percent of pattern work in a hobby shop, a template bit is more convenient because you can see the line. A flush trim bit is more common in production because the template stays out of the way of the bit and lasts longer.

Compression bits, spiral upcut, spiral downcut

A standard straight flush trim or template bit has flutes that cut sideways but tear the top or bottom face depending on grain direction. For cleaner cuts in plywood and laminate, three specialty geometries exist:

• Spiral upcut: pulls chips up and out of the cut, leaving a clean bottom edge but tearing the top face. Best for through-cuts where the visible face is on the bottom.
• Spiral downcut: pushes chips down into the cut, leaving a clean top edge but packing chips into a closed cut. Best for shallow grooves where the top face is visible.
• Compression bit: spiral upcut on the bottom half of the cutter, spiral downcut on the top half, so chips eject from the middle of the cut. Both faces are clean. Best for through-cuts in plywood or laminate. Compression bits run 45 to 90 dollars but they are worth it for cabinet shops cutting prefinished plywood.

For solid wood, a 2-flute straight bit is fine. For plywood and MDF, a 3-flute spiral or compression bit produces noticeably cleaner edges.

Climb cutting, when and how

Climb cutting feeds the router with the rotation of the bit rather than against it. The result is a slicing action that produces a glassy surface, especially on figured hardwoods. The risk is that the bit grabs the work and self-feeds, which can pull the workpiece out of clamps or jerk a handheld router across the bench.

Climb cutting is safe only when:

• You are taking a very light final pass (1/64 inch or less)
• The work is firmly clamped or held in a sled
• You are using a router table with featherboards, not a handheld router
• You can stop the bit immediately if something goes wrong

For 95 percent of pattern routing, conventional cutting (against the rotation) is correct. Save climb cutting for the last cleanup pass on figured maple or burl where tearout matters.

Safe practice and dust control

A template bit running at 18,000 RPM ejects chips at about 60 miles per hour. Always wear safety glasses and a face shield, plus hearing protection. A dust shroud that connects to a shop vac captures about 80 percent of chips on a router table and around 50 percent on a handheld router with a Bosch or Triton-style dust port.

For the test protocols we use for router and bit reviews, see our methodology page. Once you have the two bit types and the feed direction wired into your hands, pattern routing becomes the most reliable way to make 20 identical parts in an afternoon.

Frequently asked questions