Free Industrial Parts Tools
Free, no-signup calculators and part tools for industrial buyers and maintenance teams — no fabricated data. The calculators (gear ratio, voltage drop, hp to kW, kW to amps, Ohm's law, wire gauge, cylinder force) use standard formulas and definitions. The part tools are standards-based lookups; obsolete-part cross-referencing is researched by our order desk since there's no reliable way to automate it honestly.
Gear Ratio Calculator
Enter the teeth on two gears, a known ratio, or the input and output speeds, and get the gear ratio, the output speed and the output torque. Add a second stage for a two-stage reducer and an efficiency to allow for losses. It is the standard gear relationship; nothing is looked up from a table.
Voltage Drop Calculator
Enter the conductor size, the one-way cable length, the load current and the supply voltage, and get the voltage drop in volts and percent, the power lost in the cable, the longest run that stays inside your target, and the smallest standard size that meets it. For DC, single-phase and three-phase, in copper or aluminium.
HP to kW Converter
Convert between mechanical horsepower, kilowatts, metric horsepower (PS) and watts, work out the torque a motor delivers from its power and speed, or the power from a torque and speed. Includes tables of common motor ratings in both horsepower and kilowatts.
kW to Amps Calculator
Convert power in kilowatts or horsepower to current in amps, or amps to kilowatts and kVA, for DC, single-phase and three-phase supplies. Enter the voltage, power factor and, for a motor rated by its shaft output, the efficiency.
Ohm's Law Calculator
Fill in any two of voltage, current, resistance and power, leave the other two blank, and get the missing values. Unit prefixes are handled for you (mV, kV, mA, µA, kΩ, MΩ, mW, kW).
AWG Wire Gauge Chart
Look up any AWG or kcmil size, or enter a cross-section in mm², and get the area, circular mils, diameter, and the resistance of copper and aluminium per 1,000 ft and per km. The full chart runs from 4/0 to AWG 30, calculated from the AWG definition.
Cylinder Force Calculator
Enter the bore, the rod diameter and the operating pressure and get the push (extend) and pull (retract) force of a pneumatic or hydraulic cylinder in newtons, pounds-force and kilogram-force. Pressure can be in bar, psi, MPa or kPa, and an efficiency lets you see the effect of friction.
Conduit Fill Calculator
Pick the conduit type and trade size, then add up to four groups of conductors, and get the fill percent against the NEC limit, whether it passes, and the smallest trade size that does. Or choose one wire size and get the most conductors that fit. Uses NEC Chapter 9 Tables 1, 4 and 5 for THHN and XHHW.
RPM Calculator
Four calculations in one place: the synchronous speed of an AC motor from its poles and supply frequency (with slip for the running speed), the rpm needed for a surface speed on a given diameter, the surface speed at a known rpm, and the driven speed of a belt or pulley drive.
Belt Length Calculator
Enter the two pulley diameters and the centre distance and get the belt length, the speed ratio and the belt speed. Or enter a belt length and get the centre distance it gives. For an open drive, where both pulleys turn the same way.
4-20 mA Calculator
Enter the range of the transmitter (the value at 4 mA and at 20 mA) and either a current to get the process value, or a process value to get the current. It also gives the percent of span and the voltage across a loop resistor, such as 1 to 5 V across 250 ohms.
Tap Drill Chart
Choose a thread and get the tap drill size, the drill diameter in inches and millimetres, and how much of the thread the hole leaves, as a percentage. The full chart for UNC, UNF and metric coarse threads is below.
Bolt Torque Calculator
Choose a bolt size, grade and thread condition and get the tightening torque, the clamp load it produces and the bolt's tensile stress area, in N·m, lbf·ft and lbf·in. The chart below lists common coarse sizes for SAE grade 2, 5 and 8 and metric 8.8, 10.9 and 12.9.
O-Ring Size Chart
Look up the inside diameter, outside diameter and cross-section of any standard AS568 O-ring by dash number, or enter the dimensions you measured and get the closest dash numbers. All 349 standard sizes are in the chart below, in inches and millimetres.
Bearing Interchange Lookup
Type in a deep-groove ball bearing designation from SKF, FAG, NSK, NTN, or Koyo (60xx, 62xx, or 63xx series) and get the equivalent part number from every other brand instantly. Covers open, sealed (-2RS), and shielded (-ZZ) variants — the cases where the equivalence is a published, mechanical fact, not a guess.
Contactor Cross-Reference
Pick a motor (horsepower and voltage, or kilowatts) and get the NEMA size and the IEC AC-3 rating that cover it, using the published NEMA ICS 2, IEC 60947-4-1 and NEC 430.250 tables. Or start from a NEMA size or an IEC current and see the other side. Then browse real contactors in our catalog that meet the result, by their own published ratings. This compares standards and specs; it never claims one brand's part number equals another's.
Thermocouple / RTD Selector
Enter your process temperature range and see which thermocouple types and platinum RTDs cover it, and how accurate each can be under the IEC 60584-1 and IEC 60751 tolerance classes. Or check the tolerance of one sensor at a temperature, or convert between Pt100 / Pt1000 resistance and temperature. Then browse real sensors from our catalog by what each listing publishes.
Thread Identifier
Measure the outside diameter of the thread with calipers and count its pitch with a thread gauge, and this lists the standard threads that fit, with their seal type and the look-alikes they are commonly mistaken for. Or look up any listed thread by size. NPT, BSPP and BSPT, and JIC and O-ring boss, share nominal sizes and sometimes exact dimensions, so the tool tells you when a diameter and pitch cannot settle it.
Wire & Ferrule Calculator
Enter a wire gauge (AWG) or a cross-section in mm² and get the exact conductor area and diameter, the nearest gauge, and the standard ferrule size it takes. AWG values are calculated from the gauge definition, and the ferrule sizes are the standard metric series. Colours are deliberately not shown: they vary by manufacturer, so confirm the size printed on the ferrule.
Lifecycle Status Lookup
Enter a part number and see the lifecycle status published on the matching listing in our catalog: active, active (mature), end of life, discontinued or obsolete. Most listings here are Allen-Bradley. We show the status as published and a replacement only where the listing names one; if a part is not covered, our order desk will check it with the manufacturer.
Drill Point Angle Selector
Choose the material you are drilling and this recommends 118 degrees (the traditional general-purpose angle) or 135 degrees (a self-centering split point for harder or work-hardening materials), with the reasoning behind it — then matches real, currently-published drill bits in our catalog at that angle.
Bearing Life Calculator
Enter the basic dynamic load rating C from the bearing's datasheet, the equivalent dynamic load P on it, and the shaft speed — this returns the ISO 281 basic rating life in million revolutions, operating hours and years, using the correct life exponent for ball or roller bearings and the published a1 factor for reliabilities above 90%. Everything here is the standard formula; nothing is looked up from a table of our own.
Brand Comparison
Pick two or three manufacturers and see where each one is actually deep, by category, using live counts from our own catalog. This answers the question a "best brand" article cannot: for the specific thing you are buying, who genuinely covers it. It is a measure of catalog coverage and availability — not a quality ranking, and not a claim that one brand's part number equals another's.
Sensor Finder
Pick a sensor type and housing size (M8/M12/M18/M30 — a real ISO thread standard shared by every brand) to see matching real, currently-published sensors across our catalog. This tool filters live products by their own published specs — it never claims one brand's part number "equals" another's.
Obsolete Part Lookup
Manufacturers replace part numbers constantly — a superseding model, a form-fit-function equivalent, or a straight discontinuation with no direct replacement. Checking a part's lifecycle status tells you whether it is still made; it does not tell you where to get one. Send us the part number and any details you have (nameplate photo, the equipment it's in, when it was purchased) and our order desk researches the real cross-reference before quoting, rather than guessing.
Gearbox Selector
Enter what you need — gear ratio, the IEC motor frame and flange (B5/B14) it has to bolt to, output shaft size — and this ranks our currently-published gearboxes by how well each one actually matches, using only specs those products really have on file. A mismatched motor flange is excluded, not just scored low; a close-but-not-exact ratio still shows up, ranked lower and labelled why.
Motor Selector
Pick a motor type, narrow by duty/application if it matters (washdown, explosion-proof, farm duty, HVAC and more are treated as real requirements, not cosmetic options), then by frame size, enclosure style and the horsepower you need — this ranks our currently-published motors by how well each one actually matches, using only specs those products really have on file. Undersized horsepower is excluded, not scored low; a duty, frame or enclosure mismatch is excluded outright.
Bearing Selector
Enter the bore diameter your shaft needs (and outer diameter, width or seal type if you know them) — this ranks our currently-published deep groove ball, cylindrical roller, spherical roller and tapered roller bearings by how well each one actually matches. A bore or outer-diameter mismatch is excluded outright, never shown as a "close" fit — a bearing swap is a physical fit, not an approximation.
FANUC Option Code Lookup
Type a FANUC A06B or A05B part number, option suffix included or not (we treat "#7008" and "-7008" the same) — this shows the exact part if it is currently in our catalog, plus every other option code listed for that same base number. We do not know and will never claim what an option code means; this only ever states what we verifiably stock. Not held? Route straight to a quote and our order desk sources it.
GE Fanuc IC Lookup
Type a GE Fanuc IC-series part number (VersaMax/IC200, Series 90-30/IC693, Series 90-70/IC697, RX3i/IC695 & IC694, or IC600) — this identifies the family from the prefix and shows what is listed in the catalog for it, with your exact part linked out if it is listed. IC600 ships with no series name on purpose: our own published listings don't carry one, so we are not going to invent it. Not held? Route straight to a quote and our order desk sources it.
Hazardous Location Marking Decoder
Paste the marking from an enclosure, motor, sensor or junction box nameplate (for example "Class I, Division 1, Groups C and D, T4" or "II 2G Ex db IIB T4 Gb") and see what each part means, how the North American Class/Division and the IEC Zone systems compare, and the maximum surface temperature. It decodes the marking only: classifying a location is a job for a qualified engineer and the authority having jurisdiction.