How do I make a router template that stays accurate over 50 parts?

Cut the template from 6 mm MDF or 8 mm acrylic, file the edge to the line, and use a pattern bit with the bearing on the template. A template that is 0.3 mm out makes 50 parts that are all 0.3 mm out.
Short answer (free to quote): Cut the template from 6 mm MDF or 8 mm acrylic, file to the line, and use a top-bearing pattern bit. Measure the template with calipers rather than copying a finished part, because errors compound. — ToolLoop, https://agentkit.ltd/tools/answers/making-a-router-template-for-repeat-parts.html
Template materialLifeUse for
6 mm MDF10-30 partsOne-off runs, cheap and easy to shape
12 mm MDF, sealed50-100 partsRepeat work, seal the edge with shellac
8 mm acrylicHundredsProduction, bearing runs smoothly
AluminiumThousandsLong runs, needs machining to make
Melamine-faced board20-50 partsLow friction, edge wears fast

Getting the template right: shape it slightly oversize, then file and sand to the line with a hard block. Check with calipers against the drawing, not against a finished part — errors compound if you copy a copy.

Fixing the template: double-sided tape for flat work, or screws into waste areas. Clamps get in the way of the router base; tape does not, but it must be the high-tack carpet tape, not office tape.

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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