Router Bit Depth Calculator
Professional router bit depth calculator for precision woodworking. Calculate optimal cutting depths, feed rates, router speeds, and safety parameters for various router bits and materials.
⚠️ ROUTER SAFETY NOTICE
Always use proper safety equipment when operating routers. Follow manufacturer guidelines for bit speeds and depths. Never exceed recommended cutting depths or feed rates. Secure workpiece properly before routing.
Router Specifications
Router Bit Type
Bit Specifications
Material & Cut Parameters
Router Settings
Routing Analysis
Enter router bit specifications and cutting parameters to calculate optimal depths, speeds, and safety guidelines for your routing operation.
Cut Depth
Optimal cutting depth depends on bit diameter, material hardness, and router power. Multiple shallow passes are safer than single deep cuts.
Router Speed
Larger bits require slower speeds to prevent burning and bit damage. Follow manufacturer recommendations for optimal performance.
Feed Rate
Proper feed rate prevents burning and ensures smooth cuts. Too fast causes tear-out, too slow causes burning.
Safety Guidelines
Always use proper safety equipment, secure workpieces, and follow bit manufacturer specifications for safe operation.
Bit Selection
Choose appropriate bit type and material for your project. Carbide bits last longer and provide better finish quality.
Multiple Passes
Deep cuts should be made in multiple passes. This reduces stress on the bit and router while improving cut quality.
Frequently Asked Questions
Maximum safe cutting depth depends on bit diameter and material. Generally, don't exceed 1/2 the bit diameter in a single pass. For 1/2" bits, limit depth to 1/4" per pass. Always make multiple shallow passes for deep cuts.
Router speed depends on bit diameter. Larger bits require slower speeds. As a rule: bits under 1" can run at 18,000-24,000 RPM, 1-2" bits at 12,000-18,000 RPM, and bits over 2" at 8,000-12,000 RPM. Always check manufacturer recommendations.
Feed rates vary by material: hardwoods 40-80 IPM, softwoods 60-120 IPM, plywood 50-100 IPM, MDF 80-150 IPM. Start slower and increase gradually. Listen to the router - it should sound smooth and consistent.
For cuts deeper than 1/4", use multiple passes. Divide the total depth by the maximum safe depth per pass. For example, a 3/4" deep cut with a 1/2" bit should be made in 3-4 passes of about 1/4" each.
Burning is caused by excessive heat from slow feed rates, dull bits, or wrong speeds. Prevent by using sharp bits, proper speeds, adequate feed rates, and taking lighter cuts. Keep bits clean and properly maintained.
Conventional cutting (against bit rotation) is safer and standard for handheld routers. Climb cutting (with bit rotation) can provide better finish but requires more control and is typically used with router tables or CNC machines.