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How To Make Custom Molding With Our Exclusive 7-Pc. Crown Molding Router Bit Set

The Infinity 7-Pc Master Crown Moulding Router Bit Set, #00-567. Easily create unique crown moldings for both custom furniture and home remodeling.

Crown molding is one of the easiest ways to add the perfect finishing touch to small and large projects alike. It's called crown molding because it adorns the top of a cabinet or finishes off the junction between a wall and ceiling. While there is a lot of information available that covers how to install crown molding, there is little available on making it. In this blog post we dive into what makes our new router bit set unique and we show you how easy it is to make custom crown molding for your next project.  

One benefit of using our set that I want to make clear is that all of these router bits are designed to be used with your work piece flat against the router table.  That means you won't be making any tricky cuts with your boards riding against the fence, all cuts are made with the boards fully supported by your router table top. This makes the process much easier and you're virtually guaranteed to get good results. And as an added bonus, you'll notice that we've included a custom wood box to help keep this set safe and organized for years to come. Ok, now that we've got that out the way, lets take a look at how easy this set is to use.

The first couple steps in making your own custom crown molding is to layout your design and calculate the width of stock you'll need to make your molding. With the Infinity 7-Pc Master Crown Molding Set, (00-567), you have many profile options, ranging from simple to complex. So start by choosing the router bits you would like to use to create your profile. From there, it's easy to figure out how wide your work piece needs to be.

The Infinity 7-Pc Ultimate Crown Molding Router Bit Set #00-567 Comes in a customer wood box to keep the set safe and organized when not in use.

The corner stone of our set is the unique Crown Molding Edge router bit, item 56-520. This router bit creates the correct 38° and 52° chamfers that form the proper "spring angle" for the crown molding. To get the best result with this bit you'll need to know the thickness of material you'll be using for your crown mold. The thickness of your stock is the same as the amount of width you need to allow for the crown edge profile. For example, we wanted to make a 2-1/2" wide  x 3/4" thick molding so we knew we would have 1-3/4" for the profile and 3/4" material for the Crown Mold Edge.  A picture is worth a thousand words, see below for a clear explanation.

Making a simple cove crown molding is easy using the Infinity Crown Molding Edge Router Bit (#56-520) and the Infinity 1-3/4" Cove Crown Molding Router Bit (56-602)

The next step is to add together the cutting width of all the profile router bits we are using to make each crown molding. If making the simple cove crown pictured above you would add 3/4" for the Crown Edge router bit and 1-3/4" for the small cover crown molding router bit (56-602). This gives a total width for the molding blank of 2-1/2" wide by 3/4" thick.

Making a complex crown molding is as simple as choosing the router bits you want to use, add up the cutting width of each and cut your work-piece to size. Don't forget to leave 3/4" for the Crown Edge bit (shown above).

If you want to make a more complex molding just add the cutting widths of each of the bits you plan to use together to figure out your total width. The example pictured above ends up being a total of 5" wide and requires a total of 4 router bits to create the profile (56-520, 48-590, 56-604, and 58-504).

With the design and math out of the way it's time to mill the stock to size. The beauty of making your own crown molding is that you can use any material you want. On furniture this insures a perfect color and grain match which is also perfect anytime your molding will not be painted.

The Infinity Crown Molding Edge Router Bit (56-520) creates the common 38° and 52° "spring angles" used to make custom crown molding. Don't forget this bit uses 3/4" of material so you'll need to account for that in your overall width calculation.

Next it's over to the router table to start milling. Regardless of your chosen  design, you'll always start with the Crown Molding Edge router bit 56-520. Setup is straight forward; find the center-line of the workpiece and adjust the router bit height so the "V" in the router bit aligns with the center line of your work-piece.

Milling one edge face up and the other face down will produce the standard "spring angle" for most crown moldings found in residential applications.

The edge milled with the workpiece face up will go against the wall, and the edge milled with the workpiece face down will go against the ceiling.

Milling one edge of the crown molding face up will create the 52° spring angle for the ceiling and the other edge face down will create the 38° spring angle for the wall. Yes, this router bit is awesome!

Be sure to always use proper work holding techniques. My two favorite router table accessories are a pair of Jessem Clear Cut Stock Guides and the Bow Products Feather Pro feather boards. I consider both a must have in your shop when woodworking at the router table. Proper work holding is not simply a safety consideration but also improve the quality of your work. Tools like the Jessem Clear Cut Stock Guides and Bow Products FeatherPRO  allow you to make a cleaner cut and extend the life of the router bit by reducing heat and vibration at the cutting edge.

When milling the profile, mark the edges of the face of the work piece as well as the center line. Then adjust the fence on your router table until the center line on the work piece matches the center of the router bit. Easy, right?

For a simple crown molding the next step is to install the Infinity Cove Crown Molding router bit (56-602) into the router table and set the fence. Find the center of the "field" or profile portion of the stock by marking the edges created by the Crown Molding Edge router bit, then split the difference to find the center. Set the fence so that the center mark on the work piece matches the center of the router bit and double check the edges at the same time. You should have a mark for each edge of the router bit as well as one for the center.

Mill the Profile of your crown molding in multiple passes, taking a little of at a time. Even with the smallest Cove Crown Molding bits you'll get an impressive profile.

Take your time and make the cove in several passes. Depending on the size of the router bit and the species of wood being milled, making 3 or 4 passes is recommended. Once the profile is cut to full depth this simple molding is complete.

Mark the edges and center-line of each router bit to be used to make your complex crown molding and cut each profile one at a time using the center-line to set the router table fence for each. Remember to make multiple passes and not be tempted to hog out the profile in a single pass.

For complex moldings I follow the same process. Start by marking the edges of the field after the crown edge profile is cut. Remember the Crown Edge will take 3/4" on each side of your board. Then I mark the width of each bit to be used, finding the center of each. From here it's a matter of following the same procedure to create each element. Set the fence, make multiple passes to expose the profile and repeat for each router bit being used.

Using one router bit at a time, cut each profile to make your complex design. Remember to adjust your router bit speed when switching from one size router bit to another.

When complete, each element should flow from one to the next. Be sure not to leave any unintended flat spaces on your stock.

Remember when making complex moldings that use at least two profiles is how the crown will sit at the wall. Since the Crown Edge router bit (56-520) produces the common 38° and 52° angles, the molding will either extend further down the wall or further across the ceiling when installed. I prefer the traditional look with the molding extending further down the wall. In this case I label my workpiece accordingly so the edge milled with the workpiece face up will go against the wall, and the edge milled with the workpiece face down will go against the ceiling.


When designing a complex crown molding take into account where you want each profile located and mark your stock accordingly. You don't want to reverse the profiles during the milling process.

This is important because it will allow you to decide where on your molding you want each decorative element. You don't want to mill the individual profiles in the wrong place because it will cause your molding to be upside down.

A ruler makes it easy to set the height of your profile router bit for the final pass

A trick for setting the bit height for the final pass of a profile router bit is to use the edge of a ruler to align with the edge of the bit. This makes it easy to dial in the router bit height for an accurate final pass.

Check your progress often when making crown molding. You can make adjustments to your router table fence before raising your router bit to full height for a final pass.

Another trick for making sure that each element is properly located is to make a shallow first pass then come back with a pencil and mark where the edges of the bit are meeting with the still flat field. This will give a pair of lines on either side of the emerging profile that can be measured. If one side is wider than the other the fence can be adjusted to insure the profile is properly located when cut to full depth.

Mirka Mirlon makes sanding intricate profiles much easier than traditional sandpaper

When making molding use a non woven sanding pad like the Mirka Mirlon paper we offer on our site. These pads help get into difficult to reach areas to smooth the profile without rounding over all those nice details you just created.

Add even more detail to your crown molding install by using a simple ogee router bit on a pair of flat pieces of stock, then install your crown molding over them for a beautiful layered appearance.

If you want to take your crown molding to the next level use an edge profile router bit like an Infinity Double Classic Ogee router bit (44-787) on a pair of flat pieces of stock. Attach the base molding to the wall and ceiling, then attach the crown molding. This creates an easy to make super fancy detail for any room in the house.

We made a total of 7 different crown moldings (6 pictured above) with the infinity 7-Pc Master Crown Molding Router Bit Set.

Below  are seven combinations we came up with here in our shop using the Infinity 7-Pc Mater Crown Molding router bit set. Be sure to take a look at the pictures below to see how different bits can be combined to make Crown moldings to suit almost any project.

Simple Cove Crown Molding using Infinity router bits 56-520 & 56-602. The profile width in this example is 1-3/4".

Simple Cove Crown Molding using Infinity router bits 56-520 & 56-603. The profile width in this example is 2-1/4".

Simple Cove Crown Molding using Infinity router bits 56-520 & 56-604. The profile width in this example is 2-3/4".

Complex Crown Molding using Infinity router bits 56-520, 56-602, & 58-504.

Complex Crown Molding using Infinity router bits 56-520, 56-602, & 15-690.

Complex Crown Molding using Infinity router bits 56-520, 48-590, 56-602, & 15-690.

Complex Crown Molding using Infinity router bits 56-520, 58-504, 56-603, & 15-690.

7 Pc. Master Crown Molding router bit set (00-567)
Professional Router Table package with Triton Router (RTP-103)
Jessem Clear Cut Router Stock Guides (RTF-SG1)
Bow Products FeatherPRO Featherbaords (100-360)
iGaging Premium Steel Rules
Mirka Mirlon 
Double Classic Ogee router bit (44-787)

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