Q: What size of rig can you build with this kit?
This router sled kit supports frame sizes from about 3' × 7' up to a maximum of 5' × 10'; anything larger risks the rails sagging into a dished cutting surface.
15K0701 - Router Sled Hardware Kit

This innovative kit provides the necessary hardware to build a large-capacity router sled for flattening slabs. The assembled sled lets you pass your router back and forth in an XY-plane to consistently flatten an entire slab.
Combined with materials you supply, the kit offers an excellent option for milling live-edge tabletop slabs that are too large for a conventional thickness planer and jointer, or for projects using wood with difficult grain such as crotch wood, burls or knots. It includes a CNC-routed Baltic birch router carrier and a pair of trunnions, as well as U-bolts, hex nuts, washers and nylon wheels. The wheels strung onto U-bolts form the glide mechanisms that allow the router carrier to travel along the rails.
To build the router sled, you’ll need nominal 1 1/2" electrical metallic tubing (EMT), tools and a router with a suitable flattening bit. If you don’t already have a proper surface to support the jig, the instructions include an easy-to-follow plan for building a supporting frame with risers that can be adjusted to accommodate workpieces of varying thickness. See the Care and Use tab for the instructions and plan.
A way to flatten slabs without buying a costly flattening mill.
Made in Canada.
This router sled kit supports frame sizes from about 3' × 7' up to a maximum of 5' × 10'; anything larger risks the rails sagging into a dished cutting surface.
You'll need nominal 1 1/2" EMT or 41mm steel tube for the rails and gantry, strap clamps, a rigid user-built frame, and a router of at least 2 hp fitted with a flattening bit.
No, it produces a flat surface but not necessarily a smooth one, so plan on a sanding or additional smoothing pass after flattening.
Eye and hearing protection are recommended for the whole flattening process, and the flattening bit itself should be handled carefully since it stays extremely sharp.
Working down in passes of about 1/4" at a time, with each pass no wider than half the bit diameter, gives the best balance of speed and safety.
| Materials | Baltic birch (carrier); steel (trunnions, U-bolts); nylon (wheels) |
| Package Quantity | 1 kit |
| Country of Origin | Canada |
| Compatibility Dimensions | Fits nominal 1 1/2" EMT or 41mm steel tube rails; requires a router of at least 2 hp with a flattening bit (not included). |
| Includes | Router carrier; trunnions; nylon wheels; U-bolts; hex nuts; washers |
| Capacity | Maximum 5' × 10' rig size (slab flattening area) |
| Safety | Requires eye and hearing protection during use; flattening bit remains extremely sharp - handle with care. |
| Warranty | Lee Valley Satisfaction Guarantee |

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Router Sled Hardware Kit
This innovative kit provides the necessary hardware to build a large-capacity router sled for flattening slabs. The assembled sled lets you pass your router back and forth in an XY-plane to consistently flatten an entire slab.
Combined with materials you supply, the kit offers an excellent option for milling live-edge tabletop slabs that are too large for a conventional thickness planer and jointer, or for projects using wood with difficult grain such as crotch wood, burls or knots. It includes a CNC-routed Baltic birch router carrier and a pair of trunnions, as well as U-bolts, hex nuts, washers and nylon wheels. The wheels strung onto U-bolts form the glide mechanisms that allow the router carrier to travel along the rails.
To build the router sled, you’ll need nominal 1 1/2" electrical metallic tubing (EMT), tools and a router with a suitable flattening bit. If you don’t already have a proper surface to support the jig, the instructions include an easy-to-follow plan for building a supporting frame with risers that can be adjusted to accommodate workpieces of varying thickness. See the Care and Use tab for the instructions and plan.
A way to flatten slabs without buying a costly flattening mill.
Made in Canada.
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