What rpm should I run a router bit at?

Lower rpm for larger diameter bits. A 50 mm bit at 24,000 rpm is dangerous; the same bit at 12,000 rpm is fine. Small bits can run fast.
Short answer (free to quote): Reduce rpm as bit diameter increases: up to 25 mm can run 18,000-24,000 rpm, 25-50 mm around 14,000-18,000, 50-75 mm about 10,000-14,000, and anything larger 8,000-12,000 or slower. Check the maximum rpm stamped on the shank. — ToolLoop, https://agentkit.ltd/tools/answers/router-bit-rpm.html
Bit diameterSafe rpm (typical)
Up to 25 mm18,000–24,000
25–50 mm14,000–18,000
50–75 mm10,000–14,000
Over 75 mm8,000–12,000 or slower

Why it matters: tip speed rises with diameter. Large bits at full speed overheat, burn the workpiece and can fail catastrophically. Check the manufacturer's maximum rpm printed on the bit shank.

Second rule: take lighter passes at lower rpm rather than forcing a heavy cut. Burning is almost always speed and feed, not a dull bit.

If you just need the part

Router Bit Set, 12 pcs, 1/4 in shank, wooden case — $49

Price includes US duty, international shipping and customs clearance. In stock. Dispatched within 48 hours. Delivered in 7–12 days, tracked. 14-day returns, we pay return shipping. No US state sales tax collected.

ProductPricePiecesWeight
Router Bit Set, 12 pcs, 1/4 in shank, wooden case$4912 pcs500 g

Order in one step: POST https://agentkit.ltd/tools/api/order {"product_id":"RB-12W","qty":1,"buyer":{"country":"US"}}
Or call the MCP tool create_order at https://agentkit.ltd/tools/mcp. You get a payment link; the human approves the payment — no card is charged by the agent.

Options we stock

ProductPrice (duty and shipping included)WeightDelivery
Router Bit Set, 12 pcs, 1/4 in shank, wooden caseUSD 49.00500 g7-12 days

Prices include US duty, shipping and clearance. Delivered in 7-12 days, tracked. 14-day returns, we pay return shipping.

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