Tools
Two kinds of entry live here. The calculators turn the database into an answer, and each one shows its working, because a number you cannot check is a number you cannot use on a drawing. The tool reference covers the hardware itself — what each kind of saw, driver, gauge and cutter is for, and which parts of the database it connects to.
Calculators
5 available nowCalculatorMaterial weight calculatorMass of a round bar, square bar, hexagon bar, flat bar or tube from its dimensions and the density of the material. Covers metals, plastics and wood on one scale, and shows the arithmetic behind the answer.Section dimensions + materialCalculatorThread & screw identifierHave a fastener in hand and a caliper but no part number? Enter the outside diameter and the pitch and it returns the likely designation, with the deviation from nominal so you can judge the match.Measured diameter and pitchCalculatorCross-standard comparisonTwo standards catalogued as equivalents, compared field by field — head height, across flats, thread tolerance. Built for the question "can I actually substitute this?"Two standard designationsCalculatorProperty class referenceTensile strength, yield strength and the matching nut class for every property class from 4.8 to 12.9, plus the A2 and A4 stainless families.Bolt class or materialCalculatorTightening torque calculatorTorque from thread geometry and property class, with friction as a control you set rather than a constant baked in. Shows the preload it implies, and how far the figure moves between dry, oiled and plated conditions.Thread + property class + lubrication
Tool referencewhat each kind of tool is for — no model numbers, no prices
21 entriesPower Tools (8)
DrillA chuck holding a rotating bit, used to make holes and — with a driver bit instead of a drill bit — to drive screws. Every pilot hole the rest of this database assumes is made with one.Impact DriverA driver that adds a rotational hammer blow to the turning motion, so it drives and removes screws that would stall an ordinary drill. Fast, and completely blind to how tight the joint ended up.Impact WrenchA socket driver with a hammer mechanism, sized for hex head bolts and nuts rather than screws. The tool that assembles the bolted joints this database dimensioned.Circular SawA toothed blade spinning on a vertical arbor, cutting sheet goods and solid stock to length and to width. The default first cut in timber and board.JigsawA short reciprocating blade that can start from a drilled hole and follow a curved line. The tool for a cut that is not straight.Mitre SawA circular saw on a pivoting head over a fence, cutting to a set angle rather than to a marked line. Repeatability is the point.RouterA spinning cutter whose height above the workpiece is set exactly, used to profile an edge, cut a groove or rebate, or trim a laminate flush. Where a dimension has to be held by the tool.Random Orbit SanderAn abrasive disc on a free-rotating, orbiting pad. Cuts fast without the directional scratches a belt or drum sander leaves, which is why it is the finishing tool rather than the shaping one.
Hand Tools (5)
Hex Key (Allen Key)An L-shaped or T-handled bar with a hexagonal section, sized to the socket of a socket head screw. The driver for the largest single group of fasteners in this database.Socket SetInterchangeable sockets on a ratchet handle, sized to hexagon head bolts and nuts. Coverage comes from the socket range and the drive size, not from the handle.Combination WrenchA single forged bar with an open jaw at one end and a ring at the other, sized across flats. The tool that turns a hexagon head when there is no room for a socket.Torque WrenchA wrench that releases or indicates at a set torque. The only common hand tool that measures what it applied — which is what makes a specified tightening torque achievable at all.Screwdriver SetBlades ground to the width and thickness of a slotted head, in assorted sizes. Fit is the whole question: a blade that is close but wrong damages the screw.
Measuring Tools (4)
Vernier & Dial CaliperJaws that slide on a graduated beam, reading outside, inside and depth dimensions to a hundredth of a millimetre. The instrument the identifier on this site expects you to have.Outside MicrometerA screw-driven spindle in a rigid frame with a friction thimble, measuring one dimension over a narrow range to a thousandth of a millimetre.Thread Pitch GaugeA fan of toothed leaves, each cut to one pitch, offered up to a thread until the teeth sit down into the flanks. Tells you the pitch without arithmetic.Tape MeasureA graduated blade on a spring return, reading lengths from a hooked end. The first measurement in every build and the one that decides the bill of materials.
Cutting Tools (4)
Twist Drill BitsHelical-fluted cutters for making holes in metal, wood and plastic. The size on the shank is the hole, and the point geometry decides what the hole does at the far side.Tap and Die SetTaps cut an internal thread in a drilled hole; dies cut an external thread on a bar or a bolt. Together they make the threads this database dimensions.Hole SawA toothed cylinder on a central pilot bit, cutting a large circular hole with an ordinary drill. For openings where a drill bit alone would be the wrong shape and a jigsaw the wrong size.CountersinkA conical cutter that opens the top of a drilled hole to match a countersunk head, so the fastener finishes flush with the surface.
Every entry describes the tool's class rather than a model: what it does, which materials it is worked in, which drive forms it matches and where it goes wrong. Power ratings, spindle speeds and prices are deliberately absent — this database has no source for them, and an invented figure ages badly.
How these fit together
data first, then tools, then everything built on top2 · ToolsCalculators and comparisons that operate on that datathis page
The order matters: a calculator is only as good as the data under it, which is why the dataset gets built out before more tools are added.
Planned
not built yetPlannedTolerance & fits calculatorShaft and hole limits for a stated fit, with clearance and interference across the tolerance band.