Drawer Lock Router Bit Setup for 3/4 vs 1/2 Stock

By Premium CNC & Router Bits for Precision Cutting | Published: 2026-10-21

Category: How-to Guides

Learn how to set up a drawer lock router bit for 3/4-inch or 1/2-inch stock. Step-by-step guide for Whiteside 3352 and 3347 bits.

Quick answer

Use the Whiteside 3352 for 3/4-inch stock and the Whiteside 3347 for 1/2-inch stock. Set the bit depth so the cutter just enters the mating piece without forcing the joint.

Why stock thickness determines your bit choice

The drawer lock joint works because a shaped tongue on one piece fits into a matching groove on the other. The bit must match the material thickness so the joint locks tight without gaps or splits. Whiteside makes two dedicated bits: the 3352 for 3/4-inch stock and the 3347 for 1/2-inch stock. Using the wrong bit for your stock thickness will leave the joint too loose or too tight.

AstraHP coating matters for setup accuracy

Both the 3352 and 3347 have AstraHP coating, which reduces friction and heat. That coating helps the bit cut cleanly during test passes, so you can judge fit without burning the wood. It also keeps the bit sharp longer, meaning your setup stays consistent across multiple joints.

Setup steps for drawer lock router bits

Step 1: Select the correct bit for your stock: Use the Whiteside 3352 for 3/4-inch stock and the Whiteside 3347 for 1/2-inch stock. Check the minimum stock thickness on the bit's packaging or listing before starting. Using the wrong bit for your stock thickness is the most common mistake—it will not produce a tight joint.
Step 2: Install the bit and set initial depth: Insert the bit into your router collet and snug the nut. Lower the bit so the cutter extends just below the bottom face of the workpiece. For a first test, set depth about 1/32-inch shy of full engagement. Too deep on the first pass can ruin the workpiece. Start shallow and creep up.
Step 3: Make a test cut on scrap: Run a piece of scrap the same thickness as your final stock through the router. Check the fit by inserting the tongue into the groove. It should slide together with light hand pressure—no hammering needed. If the joint is too tight, raise the bit slightly. If too loose, lower the bit. Adjust in 1/64-inch increments.
Step 4: Lock in the depth and repeat: Once the test joint fits correctly, lock the router depth adjustment. Run all your drawer sides and backs using the same setting. Keep the router feed speed steady to avoid burning. Check the fit again after every few cuts—heat buildup can shift the bit slightly in the collet.

Product facts

Drawer Lock Router Bit for 1/2″ stock – Whiteside 3347 (AstraHP Coated): Drawer Lock Router Bit for 1/2″ stock – Whiteside 3347 (AstraHP Coated). Minimum stock thickness 1/2″. 1/2″ shank. Made in USA. Use this bit when working with 1/2-inch plywood or solid wood to get a snug, flush joint without extra shimming.
Drawer Lock Router Bit for 1/2″ stock – Whiteside 3347 (AstraHP Coated)
Drawer Lock Router Bit for 3/4″ stock – Whiteside 3352 (AstraHP Coated): Drawer Lock Router Bit for 3/4″ stock – Whiteside 3352 (AstraHP Coated). Minimum stock thickness 3/4″. One bit makes both cuts. 1/2″ shank. Made in USA. This bit handles both the tongue and groove in one setup, saving time and ensuring the two profiles match perfectly for 3/4-inch material.
Drawer Lock Router Bit for 3/4″ stock – Whiteside 3352 (AstraHP Coated)