Engineering apps

Free tools you can use in your browser, with nothing to install. What you enter stays on your device.

Check My Part

Open your own STL file in 3D. See its size, volume, surface area and mass, check it is a closed solid, get a rough stock and machining guide, and send it for a quote. The file never leaves your device.
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3D Machining Simulation

Watch a 3-axis milling program cut a block. Run a sample job or paste your own G-code, then check the cycle time, material removed and rapid collisions.
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3D Part Viewer

Rotate any part from the library in 3D. Change its sizes, cut a section, read its mass in nine materials and download an STL.
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3D Parts Library

Browse sixteen adjustable parts, including a pump impeller, weld neck flange, pipe reducer, bearing housing, gear, chain sprocket, hex bolt and column base plate.
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Fits Calculator

Find hole and shaft limits, clearance and interference for ISO 286 fits such as H7/g6, H7/k6 and H7/p6, with a zone diagram.
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Bolt Circle Calculator

Get the X and Y position of every hole on a bolt circle, with a scale preview and a list you can copy.
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Thread and Drill Chart

Look up pitch, tap drill, clearance hole and spanner size for metric coarse threads from M3 to M24.
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Cutting Data Calculator

Work out spindle speed, feed rate, metal removal rate and cutting power for a milling cut, with starting values for common materials.
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Tolerance Guide

Compare what grinding, machining, casting, 3D printing and other processes can typically hold, then carry your tolerance into a quote request.
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Sheet Metal Bend Calculator

Work out bend allowance, bend deduction and the flat blank length for a sheet metal bend, with drawings of the bent part and the flat pattern.
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Beam Calculator

Check bending stress and deflection for beams and cantilevers in hollow sections, I-beams, bars and tubes, in steel, stainless or aluminium.
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Bolt Torque Calculator

Find the tightening torque and clamp force for metric bolts from M3 to M36, by property class and thread lubrication, with a full torque table.
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Pump Calculator

Work out pump hydraulic and shaft power and a matching motor size, and see how flow, head and power change with speed or impeller diameter.
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Steel Weight Calculator

Work out the mass of plate, round, square and hexagon bar, tube, box section and angle in eight materials. Build a cut list with a total mass, painting area and cost, and send it for a quote.
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Pipe Schedule and Pressure Calculator

Look up steel pipe from NPS ½ to 24 in every schedule, with inside diameter, mass and flow area, and estimate its allowable pressure with the ASME B31.3 wall thickness equation.
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Spur Gear Calculator

Get the diameters, centre distance, contact ratio and span measurement of a spur gear pair from its module and teeth, with profile shift, tooth forces and a drawing of the gears in mesh.
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Pipe Thread Chart: BSP and NPT

Identify a pipe thread from its outside diameter and threads per inch, and look up BSP (ISO 228 and ISO 7) and NPT (ASME B1.20.1) sizes, pitches and diameters.
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Shaft Key and Keyway Calculator

Find the DIN 6885 parallel key for a shaft, with keyway depths, width tolerances for a normal, tight or sliding fit, the sizes to measure and the key length for a torque.
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Belt Drive Calculator

Find the belt length for two pulleys, the wrap angle on the small pulley, the driven speed and the belt speed, or the centre distance a standard belt needs, with a sketch of the drive.
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Bearing Life Calculator

Work out the basic rating life L10 of a ball or roller bearing to ISO 281 from its load rating, the load and the speed, the life at higher reliability, and the rating a target life needs.
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Fillet Weld Calculator

Check fillet welds with the simplified method of EN 1993-1-8: throat, effective length, resistance per millimetre, utilisation under a design load, and the leg size the load needs.
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