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Shop Math Worksheet Generator — Tap Drill, Counterbore, Hardness & Material Data

Combine Multiple Machine Shop Calculations into One Printable Reference

Free shop math worksheet combining four essential calculations: Tap Drill, Counterbore & Clearance, Hardness Conversion (ASTM E140), and Material Quick-ID (20 grades). Collapsible sections with completion indicators.

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Combined worksheet summary collects all results in one printable view. One sheet covers the most common calculations a machinist needs during job setup.

Pro Tip: Print a worksheet for each new job and keep it in the packet. Having tap drills, clearance holes, and material properties on one sheet at the machine eliminates trips to the reference shelf. Two minutes to fill in, saves time all day.

Advanced tap drill calculator with engagement analysis

Tap Drill Calculator →

Detailed counterbore and clearance hole reference

Counterbore & Clearance Calculator →

Full hardness conversion calculator

Hardness Converter →

Steel grade decoder with alloy composition

Steel Grade Decoder →
Start Using This Tool See How It Works

PREVIEW All Pro features are currently free for a limited time. No license key required.

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How It Works

  1. Fill In Tap Drill Section

    Select thread type, size, and engagement %. Skip if no tapped holes in the job.

  2. Fill In Counterbore Section

    Select screw type, size, and fit class. Skip if no counterbored holes.

  3. Use Hardness Conversion

    Enter a value on any scale (HRC, HRB, HB, HV) and convert to all others.

  4. Identify Material Grade

    Browse 20 common grades with machinability, hardness, and properties.

  5. Print Combined Worksheet

    Summary section shows all filled-in values in compact printable format.

Built For

  • Machinists preparing reference worksheets for each new job
  • Shop foremen standardizing job packet documentation
  • Apprentices learning machine shop reference calculations
  • Quality inspectors converting hardness values for material verification
  • Tool crib operators looking up requirements for job kitting
  • Maintenance mechanics creating reference sheets for repairs

Features & Capabilities

Four Combined Sections

Tap Drill, Counterbore/Clearance, Hardness Conversion, and Material ID — the four calculations used most during setup.

Collapsible Sections

Each section collapses with completion indicators showing which have data.

ASTM E140 Hardness

Polynomial curve fits per ASTM E140 for accurate conversion across full range of each scale.

20 Material Grades

1018, 1045, 4140, 4340, 303, 304, 316, 17-4PH, A2, D2, and more with machinability and hardness.

Combined Summary

Bottom section collects all results for single-page printing.

PDF Export

Export complete worksheet as branded PDF for job packets.

Frequently Asked Questions

No. Each works independently. Fill in what you need; the summary only shows sections with data.
ASTM E140 polynomial approximations are accurate to plus or minus 1-2 HRC points. For contractual testing, always test on the specified scale.
The worksheet provides core calculations in simplified format. Individual tools offer more sizes, deeper analysis, and additional options.
Auto-save stores the most recent worksheet. Use URL sharing for unique links per job, or export as PDF.
Disclaimer: Calculations are reference estimates. Tap drills per ASME B1.1 and ISO 261. Counterbores per ASME B18.2. Hardness per ASTM E140. Always verify critical values with calibrated instruments.

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