Fasteners Calculators

This cluster sizes the joints that hold machines together: bolted, pinned, anchored and welded. Tightening torque is converted to clamp load through the short-form nut-factor relation T = K·d·F, so the bolt preload and torque calculator tells you the actual preload a wrench produces rather than a generic spec — and the bolt torque spec chart backs it up by grade and diameter. For strength checks, the bolt shear strength calculator takes the grade's tensile strength to a shear capacity V = n·A·0.6·Su, picking the tensile-stress area in the threads or the shank area in the body, single or double plane. The bolt bearing stress calculator checks the plate side of the joint with sigma_b = F_bolt/(d·t), while the epoxy anchor pullout calculator compares bond capacity pi*d*h*tau/SF against steel tensile capacity from entered design values. The clevis pin calculator combines pin shear, simplified pin bending, eye bearing and fork bearing.

For groups and welds, the weld symbol reference covers common AWS/ISO drawing symbols, arrow-side placement, field-weld and all-around markers before the math starts. An eccentric bolt-pattern tool resolves a torsional moment plus direct shear into the load on the worst bolt. The weld throat calculator handles equal and unequal fillet legs, root-opening allowance and ASD/LRFD throat capacity, while the fillet weld size calculator gives the faster equal-leg 0.707-leg workflow. The weld group calculator extends that to rectangular eccentric weld groups using q = F/L plus M·r/J. The welding amperage calculator is the first setup step for many shop searches: process, material, thickness and stick rod size into MIG, TIG, stick or flux-cored current range, voltage starting point and pass-count warnings. The welding heat input calculator then keeps procedure variables visible by converting voltage, current, travel speed and efficiency into kJ/mm and kJ/in before a WPS comparison. The welding duty cycle calculator checks the same current against a machine thermal rating with I^n·D interpolation, required cooldown and continuous-current estimates. The welding deposition calculator estimates fillet weld volume, deposited metal, filler required and arc time from weld length, leg size, deposition rate and efficiency; the groove weld area calculator does the same takeoff job for square butt, V-groove and bevel groove prep with root opening, root face, cap reinforcement and filler efficiency; the weld cost per inch calculator adds user-entered filler price, labor/shop rate, labor time factor and overhead to report cost per inch, foot and meter; and the welding wire feed speed calculator converts wire diameter and WFS into filler and deposited-metal rate. A three-wire thread pitch-diameter tool rounds out inspection.

It is built for machinists, fabricators and design engineers who want the governing formula, symbol reference and standard boundary on screen — not a black box behind a parts quote. Formula-only anchor screens, groove takeoffs, duty-cycle screens, weld-cost estimates, welding setup ranges and symbol lookups still need manufacturer, code, WPS, inspection, shop-rate, edge/spacing and concrete-breakout checks for final use.