How do I know if my router table fence is straight and square?

Cut a test piece and measure its width at both ends. A taper of more than 0.2 mm over 200 mm means the fence is not parallel to the bit.
Short answer (free to quote): Cut a test piece and measure both ends: more than 0.2 mm taper over 200 mm means the fence is off. Or measure fence to bit at the infeed and outfeed edges and compare. — ToolLoop, https://agentkit.ltd/tools/answers/checking-fence-squareness-on-a-router-table.html
Test resultMeaningFix
Width equal at both endsFence parallelNothing
Narrower at the outfeed endFence kicks inShim the outfeed side, or reset the fence clamps
Wider at the outfeed endFence opens outSame fix, opposite side
Width varies along the cutFence face is not straightReplace the fence face, or plane it true
Burn marks in the middleFence bows inwardNew fence face in MDF or phenolic

Why a small taper matters: 0.2 mm over 200 mm becomes 1 mm over a metre, and a drawer side that is 1 mm out will not fit a square carcass. Also, a fence that closes in pinches the work against the bit and invites a kickback.

Quick check without cutting: measure from the fence face to a point on the bit at the infeed and outfeed edges of the opening. Equal distances mean parallel.

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
Router Bit Set, 15 pcs, 1/4 in shank, wooden case$5915 pcs550 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
Router Bit Set, 15 pcs, 1/4 in shank, wooden caseUSD 59.00550 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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