SKU: SET-003

Infinity Tools Set-up blocks for 55-503 Large Lock Miter Bit

Name: Infinity Tools Set-up blocks for 55-503 Large Lock Miter Bit
Brand: Infinity Cutting Tools
SKU: SET-003
Price: 9.9 USD
Availability: InStock

$9.90

Shipping calculated at checkout.

Description Reviews Q&A Blog Videos

Pre-Machined Router Bit Setup Block - For Lock Miter Sr. Bit, 55-503

Don't fumble with router bit setup, some cutters take more time to get setup correctly. For example, getting the perfect cut from your Lock Miter router bit can be frustrating if you don't have experience with this type of bit. That's why we took the pain out of router bit setups with our pre-machined 3/4" thick blocks. Made from pre-cut high density plastic, they'll make once frustrating bit set-up a thing of the past.

Easy to use; set the height of your router bit so the 3/4" thick block matches the profile of your cutter, since the height of your bit is automatically set, you only make a few trial cuts to dial it in. Don't waste wood or time. For use with 3/4" stock only, will work with most manufacturer's bits. Checkout the helpful videos for set-block usage below.

Please note; setup blocks that come as a matched pair are not meant to be an exact fit. They are meant to serve as a height adjustment aid and / or a fence distance aid.

Lock Miter Master Jigs & Router Bits

The patented Lock Miter Master Jig is a precisely-machined setup aid for use with lock miter router bits in your router table. Unlike setup blocks, the Lock Miter Master Jig allows you to set the fence position and router bit height for the specific piece of wood you're working with.

Friction Fit

Locking miter joints are one of those woodworking processes you have to try to believe. This type of joinery deserves a coveted spot on your all-time favorites list, alongside dovetail joints and inlay techniques. The beauty of this joint is the interlocking parts, that create a perfect friction fit. Plus, you’ll never have to struggle with plain miter joints again!

Choose Your Size

The Lock Miter Sr. Bit #55-503 handles stock thickness from 3/8” up to 1-1/8” thick. The Lock Miter Jr. Bit #55-502 handles a more typical thickness range of 3/8” through ¾”. Whatever size you select, these Infinity bits come with a patented Lock Miter Master Jig for quick and easy setup. In fact, I’d wager you’ll hit your mark on the very first try.

Just follow the line to a perfect setup.

Master Jig Makes the Difference

You see, unlike most lock miter bits that offer a setup block, the Lock Miter Master Jig works for any material thickness – even if that’s an odd dimension. Click the magnetic gauge in place on the bit, and make sure to slide it up the carbide profile until it contacts the underside of the cutter. Then simply adjust the bit height until the large hashmark on the gauge aligns with your center mark.

Start Square

Quickly square the jig to the router table fence, before proceeding to the next step.

Fence Position

Quickly dial in the correct fence position by aligning the center mark with the large hashmark. At this point it seems too easy to be true, but just wait for those perfect test joints!

Slide it Up

Here you can see the finger-like projection on the red Lock Miter Master Jig. Slide the jig up the carbide profile until it contacts the bottom of the carbide tooth. You’ll feel a positive stop, and this is the correct position for any bit height or fence adjustments.

Pro Tip!

Here’s one of the absolute secrets to flawless lock miter joints every time. Attach strips of ¼” MDF to your router table fence with double sided carpet tape (AKA woodworking tape). Make the first pass on all workpieces with these strips in place. Then remove the spacers for the final pass. The result is less strain on your router, and crisp splinter-free profiles.

First Pass

The basic idea of a locking miter joint is to mill one board flat on the router table, and the adjacent board held vertically against the router fence. Here the spacer strips are in place against the fence for the first pass. Note the same profile is routed on both edges of the board.

The second pass is vertical, against the fence.

First Pass on Vertical Parts

With the spacer strips still installed against the fence, readjust the feather boards for a vertical cut. Make the first pass in all of the vertical pieces, which are walnut in this case. Again, you’ll rout the same profile on both edges of the board.

Pro Tip #2 … Backer Board!

Now remove the fence spacer for all remaining cuts. This second pass develops the knife-edge profile we expect with a locking miter joint. While the ¼” spacer has been removed from the fence, you may notice a backer board has been added to the workpiece. This, as it turns out, is critical for supporting the knife-edge on the outfeed side of the bit. Like before, this strip of ¼” MDF is attached with double sided carpet tape.

... and one more pass in the vertical position.

Second Pass on Vertical Parts

Just like the horizontal parts, add a backer board to the vertical parts and make the second pass. It’s worth noting that bit height and router fence position remain unchanged throughout this process. Just set ‘em and forget ‘em.

The finished product shows the accuracy possible.

Unrivaled Cut Quality

Using this technique with an Infinity Lock Miter bit produces seamless corner joints and astonishing cut quality. No tearout. Zero snipe.

Plus, the long joints can be sanded or eased with a roundover bit – just like a solid wood post. Just imagine the possibilities for oversized furniture legs and fireplace mantels, all from common ¾” stock.

The setup and the finished product. Nice.

Amazing Just Became Amazingly Easy

With a carbide tipped Lock Miter router bit, these amazing joints are now effortless to setup – thanks to the patented Lock Miter Master Jig. If you’re the type of woodworker that likes to be prepared for anything, get the 4pc. set with both the Lock Miter Jr. and Lock Miter Sr. bits, with included master jigs for each.