Why Flattening Slabs with a CNC is Better Than a Router Sled
If you're working with live edge slabs or rough-cut hardwoods, slab flattening is a critical step in the woodworking process. For years, woodworkers have relied on router sleds to flatten slabs. While functional, this traditional method has its limitations—especially when it comes to precision, time, and consistency.
At East Nashville CNC, we offer professional slab flattening services using industrial-grade CNC machinery. Here’s why using a CNC is a superior alternative to flattening slabs with a router sled.
1. Unmatched Precision and Accuracy
Router sleds depend on manual guidance and often result in subtle inconsistencies in depth and flatness—especially on larger slabs or when the router bit hits dense or uneven grain. CNC machines, on the other hand, are computer-controlled, ensuring every pass is measured down to the thousandth of an inch. This precision means a perfectly level surface, every time.
2. Faster Turnaround Time
Flattening a slab with a router sled is labor-intensive and time-consuming. Each pass requires manual adjustment, and cleanup afterward can add even more hours. Our CNC machine automates this process, completing flattening jobs in a fraction of the time. Whether you're prepping a slab for a live-edge table or custom countertop, faster results mean faster project delivery.
3. Less Tear-Out and Smoother Finish
Router sleds often leave tool marks or tear-out, especially when the wood grain changes direction or contains knots. Our CNC uses optimized feed rates and tooling to reduce tear-out and produce a smoother surface finish, which means less sanding and less material waste.
4. Ideal for Large and Irregular Slabs
Large slabs can be difficult to stabilize on a router sled, increasing the risk of an uneven cut or accidental gouge. CNC machines provide a fixed bed and hold-down system that securely supports the slab throughout the process. This stability makes CNC the safest and most reliable option for oversized or irregular-shaped pieces.
5. Repeatable Results for Multiple Pieces
If you're producing multiple slabs or working on a matched set (like a pair of bookmatched table tops), CNC flattening ensures uniform thickness and consistent results across all pieces. That’s something that’s nearly impossible to guarantee with manual methods.
Upgrade Your Slab – Let Us Do the Flattening
At East Nashville CNC, we specialize in helping woodworkers, builders, and furniture makers get the most out of their materials. Whether you're a hobbyist or a pro, our CNC slab flattening service can help you save time, reduce waste, and achieve better results on your next project.
Ready to flatten your slab the easy way?
Contact us today or stop by the shop to learn more about our CNC capabilities.