Mid-Year Tooling Budget Review: What Smart Shops Track

Most shops manage tooling spend reactively: they buy what breaks, replace what runs out, and look at the total monthly credit card statement and wince. A handful of shops manage it proactively — they know their cost per hole, they track reconditioning ROI, and they can look at their tooling inventory turns and tell you whether their money is working or sitting idle.

Mid-year is the right time to do this review. You have six months of data, you still have half the year to make corrections, and you haven't yet locked into next year's budget.

Metric 1: Cost Per Hole (CPH)

Cost per hole is the foundational tooling metric. It converts all tooling spend — new tools, resharpening, replacements — into a per-hole number that allows direct comparison across tool types, vendors, and processes.

The formula:

CPH = (Tool Cost + Resharpening Cost) / Total Holes Drilled

Example: 1/2" HSS drill in 4140 steel

• Tool purchase: $18
• Sharpening cycles: 6 | Cost per cycle: $7
• Holes per cycle: 280 | Total holes: 280 × 7 = 1,960
• Total cost: $18 + (6 × $7) = $60
• CPH: $60 / 1,960 = $0.031/hole

Using CPH to compare grades: If cobalt HSS (M42) at $28/drill delivers 420 holes per grind vs. M2 at $18/drill delivering 280 holes at same resharpening cost:

• M2: ($18 + $42) / 1,960 = $0.031/hole
• M42: ($28 + $42) / 2,940 = $0.024/hole

M42 wins on CPH. Many shops default to M2 because the per-drill price is lower, but that's looking at the wrong number.

CPH tracking: For each major drill size/material combination, track a rolling 6-month CPH. When the number trends up, investigate — it usually means resharpen quality dropped, the SFM/feed program needs updating, or the coolant system needs attention.

Metric 2: Reconditioning ROI

The reconditioning decision is an investment decision with a measurable return.

The ROI formula:

ROI = (Value of Extended Life - Reconditioning Premium) / Reconditioning Premium

Example: A 3/4" drill getting standard sharpening produces 400 holes per cycle at $14/sharpen. After 5 cycles, web growth causes performance decline to 280 holes per cycle.

• Option A: Continue standard sharpening at $14 → 280 holes per sharpen
• Option B: Reconditioning at $22 (includes web thinning) → restores 400 holes per sharpen

Annual volume: 24 sharpenings

• Option A: 24 × $14 = $336 → 6,720 holes/year → CPH $0.050
• Option B: $22 + 23 × $14 = $344 → ~9,140 holes/year → CPH $0.038

Reconditioning delivers 24% lower CPH. The one-time premium pays back many times over. Track this: when you choose reconditioning, log holes per cycle before and after, and the cost premium. After 6 months you have real data for every size range.

Metric 3: Inventory Turnover Ratio for Cutting Tools

Tooling inventory ties up capital. A slow-moving tool sitting in a drawer for months isn't providing any value.

Tooling Inventory Turns formula:

Turns = Annual Tooling Consumption (at cost) / Average Tooling Inventory Value (at cost)

Example: Shop consumes $48,000/year in cutting tools. Average inventory on hand: $12,000.

Turns = $48,000 / $12,000 = 4 turns/year

For cutting tools, 4–8 turns per year is the typical range for well-managed shops. Under 3 turns means excess inventory — capital sitting idle. Over 10 turns suggests you may be running too lean and risking stockouts.

If your drill inventory is worth $3,000 and you spend $6,000/year on drills: 2 turns. Too low — examine what's sitting. Discontinued sizes? Overstock on slow sizes? Drills that should have been retired months ago?

Metric 4: Resharpen Rate vs. Replace Rate

Of drills that leave service, what percentage are resharpened vs. replaced? Keep a resharpen bin and a trash bin. Count what goes in each, weekly or monthly.

Target: Most shops should be resharpening 60–80% of drills at their resharpen threshold size and above. Below 50%: you're replacing tools that could be economically resharpened. Above 90%: you may be resharpening drills that should be retired.

Size-adjusted: Below your threshold size (typically 1/4"), replace rate should be near 100%. Above it, resharpen rate should dominate.

Metric 5: Tooling Spend Per Part

Tooling spend per part tells you how tooling cost scales with production. It's the right metric for quoting and for understanding margin erosion.

Tooling Spend/Part = Total Tooling Cost / Parts Produced

Track this monthly, by part family or by major operation. If tooling spend per part is increasing quarter-over-quarter while production is flat, something is wrong — dull tooling running longer, geometry problems causing higher wear, or material lot variation.

Running the Mid-Year Review

1. Pull six months of tooling purchase data. Categorize: new drills, resharpening, replacement of broken tools, other cutting tools.
2. Calculate CPH for your top 5 drill operations (most-used size/material/machine combinations). Compare to your baseline from last year or your last review.
3. Check your reconditioning vs. sharpening split. Are you making conscious decisions, or defaulting to one service? Review the economics for your top 3 drill sizes.
4. Count your drill inventory. Walk the shop, count what's on hand, value it at cost. Calculate your turns ratio.
5. Check your resharpen vs. replace rate. Spot-check the trash bin — are drills being discarded that should have gone to resharpening?
6. Identify one improvement for the second half. One concrete change per review cycle compounds meaningfully over time.

What Good Looks Like

Well-managed shops know their CPH for major operations within about 20%. They review it quarterly. They make resharpening vs. replacement decisions based on economics rather than habit. They're turning their tool inventory 5–6 times per year. And they have a baseline to compare against when performance changes.

None of this is complex accounting. It's counting holes, tracking costs, and doing arithmetic. The shops that do it spend 15–20% less on cutting tools than comparable shops that don't — not because they found magic tools, but because they stopped wasting money on the wrong decisions.