Primary process: Honing / Lapping / Polishing. The full route, materials, tolerances and design tips for a lapped flat, with an indicative cost.
Honing / Lapping / PolishingPrimary process
AbrasiveFamily
4Route steps
+/-0.001mmTypical tol.
A lapped flat is primarily made by Honing / Lapping / Polishing. Lapping and polishing rub the part against a tool with fine abrasive slurry to reach mirror finishes and sub-micron flatness. Below is the full route to make a lapped flat, the materials it suits, the tolerances to expect and the main design points. The route is free, from the finder.
Step by step
How a lapped flat is made
The usual route, raw material to finished part. The amber step is where the lapped flat gets its basic shape.
Rough machining
Machine the lapped flat close to size, leaving grinding stock.
Tooling None Tolerance ±0.125mm, to ±0.025mm Lead 1 to 10 days
Heat treatment
Harden the lapped flat first so the finished surface stays hard.
Tooling n/a Tolerance can distort Lead days
Honing / Lapping / Polishing
Hone, lap or polish the critical surfaces to the tightest tolerance and finish.
Tooling Low Tolerance ±0.001 to 0.01mm Lead days
Clean and inspect
Clean and measure surface finish, size and roundness.
Need the real cost for a lapped flat? The free route above is yours. Unlock the full dossier to quote and source it.
Where this process typically lands. Tighter is possible with extra operations like grinding, at higher cost.
Materials
Materials for a lapped flat
Grade
Why it suits this
(hardened/precision parts)
n/a
Design
Design tips
General pointers. The full design-for-manufacturing list for a lapped flat is in the dossier.
Over-specifying finish.Set Ra to function.
Large area to lap.Minimise the lapped zone.
Cost
What a lapped flat should cost
Honing/lapping/polishing for the finest finish and flatness; slow and costly, use only where function needs it.
PER-PART COST vs VOLUME
Per-part cost drops as volume spreads tooling and setup over more parts. The exact figures for a lapped flat at your volume, in your currency, are in the dossier.
MODEL EST.
$21 to 58per part at 1 off
A rough ballpark only. The dossier gives should-cost at your exact volume and currency, with the full breakdown.
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Everything you need to quote and source it
The free route above is yours. To actually put a number on a lapped flat and buy it well:
Should-cost at your exact volume in 12 currencies, with the material, processing, tooling and overhead breakdown
Who to source from, typical MOQ and lead time, and the exact RFQ checklist to send
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A lapped flat is primarily made by honing / lapping / polishing. The route is: Rough machining; Heat treatment; Honing / Lapping / Polishing; Clean and inspect.
What does a lapped flat cost?
It depends on size, tolerance and volume. As a rough ballpark it starts around $21 to 58 per part at 1 off and falls with quantity. The dossier gives should-cost at your exact volume and currency. A model estimate, not a quote.
What material is a lapped flat made from?
Common choices are (hardened/precision parts).
What is the main process for a lapped flat?
Honing / Lapping / Polishing. Optical, sealing and metrology surfaces needing the finest finish and flatness.
See the exact route and should-cost for your part
The free finder maps your part to its process and full route. Pro adds should-cost at your volume, sourcing and an RFQ draft.
