Small Shop vs. Production Shop: Different Resharpening Strategies

The decision to resharpen isn't the same for every shop. The economics, the logistics, and the right approach differ significantly between a small job shop with a handful of CNC machines and a production environment running high-volume parts. Both benefit from resharpening — but in different ways and on different schedules.

THE SMALL JOB SHOP (3–10 MACHINES)

The small shop has a different cost structure. Drill usage is varied — many sizes, many materials, lower volume per size. You might use a dozen 3/8" drills in a month but only two 7/8" drills.

The right approach: collect and batch-ship. Set up a bin in the shop. Any drill that's dull goes in the bin. When the bin has 15–20 bits, ship them. MachinistPost handles mixed sizes in a single order — no sorting by size required at your end.

The mistake small shops make is treating resharpening as a one-at-a-time decision: "this drill is dull, should I sharpen it or buy a new one?" Batching eliminates that friction. The bits go in the bin, the bin ships every few weeks, the sharp bits come back. No decision required per drill.

For a small shop, resharpening typically covers the 3/8" and larger sizes well. Below 1/4", the calculation is closer — consider your specific usage volume and the cost of the bits involved.

THE PRODUCTION SHOP (10+ MACHINES, HIGH VOLUME)

Production shops have a different problem: they need consistent geometry across large quantities of bits in the same size, often across multiple machines running the same operation. A worn bit on one machine making 400 holes per shift becomes a quality issue fast.

The right approach for production: shadow kits and scheduled replacement cycles. Rather than waiting for bits to fail (which causes downtime and scrap), production shops should run bits on a predetermined cycle — resharpen at X holes or X days regardless of apparent condition. The bit goes to resharpening while the shadow (backup) set runs.

This requires a slightly larger bit inventory but eliminates unplanned downtime from bit failure and keeps geometry consistent. The regrind cycle can be dialed in based on your material, speeds/feeds, and acceptable hole tolerance.

Production shops with Pro Member pricing get the per-bit cost low enough that resharpening every drill above 1/4" is clearly the right call economically.

WHAT BOTH SHOPS GET WRONG

Small shops default to buying new and dealing with the cost. Production shops sometimes let bits run too long trying to maximize cycles, then deal with the downtime and quality consequences. The fix in both cases is a system: decide in advance what triggers a bit going for regrind, and stick to it without a per-drill cost-benefit calculation every time.

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