MetriFab
MASTERSPECS KNOWLEDGE ENGINE12 INDUSTRIAL REFERENCE GUIDES

Engineering Reference Guides & Master Charts

Concise, formula-driven industrial shop manuals paired with interactive sortable master lookup tables. Every specification is verified against manufacturer datasheets and linked directly to dedicated CAD calculators.

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3d-printing26 Spool Brands Indexed

Empty Spool Weight Chart: 25+ Brands Tare Database

Primary FormulaW_net = W_scale - W_tare | L = (4 · W_net) / (π · ρ · d²)

Lookup empty filament spool tare weights for Bambu Lab, Polymaker, eSun, and 25+ brands. Calculate remaining filament meters and avoid mid-print runouts.

8 min readOpen Guide
3d-printing40 Materials Indexed

3D Filament Density & Drying Chart (g/cm³ & Meters/Kg)

Primary FormulaV = M / ρ | L_1.75 = M / (ρ · 2.405) | L_2.85 = M / (ρ · 6.379)

Compare density (g/cm³), linear yield (m/kg), nozzle temperatures, and drying specs across 40 3D printing filaments from PLA and PETG to PEEK and TPU.

9 min readOpen Guide
3d-printing101 Printers Compared

3D Printer Electricity Cost & Print Pricing Formula

Primary FormulaPrice = (Material + Electricity + Machine_Wear + Labor) × (1 + Buffer) × Margin

Calculate 3D printer electricity costs across 101 models and price commercial print jobs with our verified material, wear, labor, and markup formula.

10 min readOpen Guide
woodworking10 Slide Models Calibrated

Drawer Slide Clearance & Box Deduction Chart (Blum)

Primary FormulaW_box = W_opening - ΔW_slide | L_sub = W_box - 2 · T_side | Bottom Recess = 1/2" (12.7mm)

Master drawer slide clearance specifications: opening width deductions, bottom recesses, and vertical tolerances for Blum Tandem, Movento, and Salice.

9 min readOpen Guide
woodworking5 Dimensional Sizes Indexed

Nominal vs. Actual Lumber & Plywood Thickness Chart

Primary FormulaΔ_error = N · (W_nominal - W_actual) | 1x4 = 3/4" × 3-1/2" (19 × 88.9mm)

Reference exact actual dimensions for softwood dimensional lumber, hardwood stock, and metric Baltic birch plywood. Prevent costly shop layout errors.

7 min readOpen Guide
casting10 Casting Polymers Benchmarked

Silicone & Resin Specific Gravity Chart + Mold Math

Primary FormulaW_grams = V_cm³ · SG · (1 + Buffer) | 1g H₂O = 1 mL = 1 cm³

Calculate casting weight from mold volume using specific gravity (SG) for platinum silicone, polyurethane resin, Jesmonite, and deep-pour epoxy.

9 min readOpen Guide
casting20 Volume Batches Pre-Computed

Jesmonite AC100/AC730 Mix Ratio Chart (g/mL & Pigment)

Primary FormulaAC100: 2.5 Base : 1.0 Liquid pbw | SG = 1.75 g/cm³ | Max Pigment ≤ 2%

Lookup exact base powder and acrylic liquid grams for Jesmonite AC100 (2.5:1) and AC730 (5:1) per mold volume, including strict 2% pigment thresholds.

8 min readOpen Guide
home-build4 Wall Presets Calibrated

Board & Batten Spacing Formula & Layout Calculation

Primary FormulaS_gap = [W_wall - (N · W_batten)] / (N - 1) | X_k = (k - 1) · (W_batten + S_gap)

Calculate exact equal spacing between board and batten wall stiles. Eliminate cumulative tape measure rounding errors with continuous pull layout.

8 min readOpen Guide
home-build8 Ceiling Proportions Calibrated

Wainscoting & Board & Batten Height Proportions

Primary FormulaH_rail = H_ceiling · Ratio | Classical = 1/3 (32"-36") | Modern = 2/3 (64"-72")

Architectural height proportions for wainscoting and board & batten walls. Compare classical 1/3, 1/2, 2/3, and 3/4 rules for 8ft, 9ft, and 10ft ceilings.

7 min readOpen Guide
laser-cnc5 Laser Substrates Benchmarked

Laser Cutter Kerf Offset Chart & Press-Fit Joint Guide

Primary FormulaK = (W_nominal - W_measured) / 10 | Offset = K / 2 | Diode: 0.10-0.15mm

Reference exact kerf widths for diode and CO2 lasers across plywood, MDF, and acrylic. Apply half-kerf contour offsets for tight finger joints.

9 min readOpen Guide
laser-cnc6 Sheet Calipers Profiled

Laser Plywood & Acrylic Thickness Tolerance Chart

Primary FormulaSlot Depth = T_measured ± 0.05mm | 1/8" Ply = 2.65mm to 3.25mm

Measure true caliper thickness variances in 3mm and 1/8" laser sheet goods. Calibrate tab slot depths to eliminate loose or cracked finger joints.

8 min readOpen Guide
woodworking64 Fractional Steps Indexed

Fraction to Decimal to mm Chart (1/64" to 1" Table)

Primary Formulamm = inches · 25.4 | inches = mm / 25.4 | 1/8" = 3.175mm | 1/2" = 12.7mm

Precision 64-row workshop conversion chart from 1/64" to 1" in fractional, decimal inches, and exact millimeters with drill bit & sheet equivalencies.

7 min readOpen Guide