Calculators Archive • Page 2 of 6 • Vibromera

Surface Roughness Symbols ISO 1302 | Free Reference Tool

Free online reference tool for ISO 1302 surface roughness drawing symbols. Select machining process or Ra value to see proper drawing notation, MRR indicator, and lay direction.

By Nikolai Shelkovenko, 4 weeks ago March 5, 2026

Surface Roughness Converter | Ra ↔ Rz ↔ Class ↔ Finish

Free online surface roughness converter. Convert between Ra, Rz, roughness class (N1–N12), and CLA/AA microinch values. Includes typical machining processes and surface finish descriptions.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Surface Roughness Calculator Ra Rz Rq Rt | ISO 21920

Free online ISO 21920 surface profile parameters calculator. Enter Ra value to estimate Rz, Rq, Rt relationships. Filter cutoff reference and parameter descriptions.

By Nikolai Shelkovenko, 4 weeks ago March 5, 2026

Stud Bolt Torque Calculator — Free Preload Tool | Vibromera

Free online calculator for stud bolt tightening torque. Enter stud size, class, and friction conditions to calculate target torque and preload for double-end studs.

By Nikolai Shelkovenko, 4 weeks ago March 5, 2026

Stress Concentration Factor Kt Calculator | Vibromera

Free Kt stress concentration factor calculator. Simplified Peterson's chart data for notch, hole, fillet, and shoulder geometries. Enter dimensions to get Kt.

By Nikolai Shelkovenko, 4 weeks ago March 5, 2026

Stress Calculator — Tensile, Shear & Bending | Vibromera

Free online stress calculator. Calculate tensile stress σ=F/A, shear stress τ=F/A, and bending stress σ=M/W. Enter force, area, moment, and section modulus.

By Nikolai Shelkovenko, 4 weeks ago March 5, 2026

Strength Unit Converter: MPa ↔ ksi ↔ PSI ↔ GPa | Vibromera

Free strength/stress unit converter. Convert between MPa, kPa, GPa, PSI, ksi, kgf/mm², kgf/cm², bar, N/mm². All units shown simultaneously. Material strength reference table included.

By Nikolai Shelkovenko, 4 weeks ago March 5, 2026

Steel Allowable Stress Calculator | Free ASME Tool | Vibromera

Free steel mechanical properties lookup with allowable stress calculation per ASME. Calculate σ_allow, fatigue endurance limit, and safety factors for static and alternating loads.

By Nikolai Shelkovenko, 4 weeks ago March 5, 2026

Steel Pipe Dimensions ISO 4200 | DN/NPS Lookup Tool

Free steel pipe dimensions lookup per ISO 4200. Enter DN or NPS to get OD, wall thickness, ID, and weight per meter for Schedule 10, 40, and 80.

By Nikolai Shelkovenko, 4 weeks ago March 5, 2026

Steel Grade Equivalent & Carbon Equivalent Calculator

Free steel grade cross-reference with carbon equivalent calculator. Convert between EN, AISI, DIN, JIS. Calculate CE, weldability, and preheat temperature per AWS D1.1.

By Nikolai Shelkovenko, 4 weeks ago March 5, 2026

Star-Delta Starter Calculator | DOL vs Y-Δ Comparison

Compare DOL and Star-Delta starting. Calculate starting current, torque, contactor sizing and changeover time for Y-Δ motor starters. Free online tool.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Spur Gear Calculator | ISO 6336 | Free Online Tool

Free online ISO 6336 spur gear calculator. Enter module, teeth count, face width, and material to calculate pitch diameter, center distance, contact stress, and bending stress.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Spring Selection by Target Frequency Calculator

Calculate the required spring stiffness for a given mass and target natural frequency. Free tool for vibration isolation design and spring selection.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Spline Connection Calculator ISO 4156 | Free Tool #075

ISO 4156 involute spline calculator. Enter module, teeth, pressure angle, length, torque. Calculate load capacity and bearing stress.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Machine Tool Spindle Unbalance Calculator

Free online calculator for machine tool spindle unbalance per ISO 21940. Enter spindle mass, max speed, and balance grade to get permissible unbalance in g·mm, eccentricity in nanometers, centrifugal force, and tool deflection estimate.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Speed & Velocity Converter | m/s km/h mph ft/s knots

Free online speed and velocity converter. Convert between m/s, km/h, mph, ft/s, ft/min, knots, and Mach number. Instant simultaneous display of all units.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Specific Speed Calculator (Ns) | Free Online Tool

Free online specific speed calculator (ns). Ns=n√Q/H^(3/4). Determine recommended impeller type.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Spare Parts Inventory | Reorder Point | Free Tool

Calculate spare parts reorder point. ROP = demand rate × lead time + safety stock.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Welding Heat Input Calculator & ISO 4063 Reference

Free welding heat input calculator with ISO 4063 process reference. Calculate heat input Q (kJ/mm), cooling time t8/5, preheat temperature, and carbon equivalent CE.

By Nikolai Shelkovenko, 4 weeks ago March 5, 2026

Sound Level Converter | dB ↔ Pa | SPL Calculator | Free Tool

Convert between sound pressure level (dB), dBA, and pressure (Pa). SPL = 20·log10(p/p_ref). Free online acoustics tool with A-weighting reference.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Soft Foot Calculator — Free Machine Frame Distortion Check

Free online soft foot calculator for machine frame distortion check. Enter dial indicator readings at each foot to identify the worst soft foot, determine shim corrections, and verify acceptable limits.

By Nikolai Shelkovenko, 4 weeks ago March 5, 2026

Socket Head Cap Screw ISO 4762 Dimensions | Free Online Tool

Free online ISO 4762 socket head cap screw (SHCS) dimension lookup. Enter size to see head diameter, head height, hex key size, and estimated mass.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Sling Capacity at Angle Calculator | Free WLL Tool

Free sling load calculator. Determine effective WLL at sling angles for 1-4 leg slings. Factor: 0°=1.0, 30°=0.87, 45°=0.71, 60°=0.50.

By Nikolai Shelkovenko, 4 weeks ago March 5, 2026

Shim Thickness Calculator | Shaft Alignment Shimming

Calculate required shim thickness at each motor foot for shaft alignment correction. Enter misalignment values, foot positions, and get shim recommendations using standard sizes.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Shaft Relative Vibration Limits per ISO 7919 | Vibromera

Free online calculator for shaft relative vibration limits per ISO 7919. Evaluate proximity probe measurements, determine vibration zone (A/B/C/D), and check compliance for turbines, generators, and rotating machinery.

By Nikolai Shelkovenko, 4 weeks ago March 5, 2026

Shaft Seal Selection — ISO 6194 | Free Online Tool

Free online shaft seal selection tool per ISO 6194. Enter shaft diameter, speed, pressure, and medium to get recommended lip seal type and dimensions.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Shaft Radial Runout Calculator — Free TIR Tool | Vibromera

Calculate permissible shaft radial runout (TIR) based on balance grade and operating speed. Compare measured runout against ISO 21940 limits.

By Nikolai Shelkovenko, 4 weeks ago March 5, 2026

Shaft Diameter for Torsion Calculator | Free Tool

Free online calculator for minimum shaft diameter under torsion. Enter torque and allowable shear stress to calculate required diameter. Shows safety factor and polar moment of inertia.

By Nikolai Shelkovenko, 4 weeks ago March 5, 2026

Shaft Deflection Calculator | Free Tool #072

Calculate shaft deflection under point center load, offset load, distributed load, or cantilever. Enter length, diameter, E, and load.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Shaft Alignment Tolerance Calculator | ISO 14691 Free Tool

Free online shaft alignment tolerance calculator based on ISO 14691 guidelines. Determine permissible offset and angular misalignment tolerances for flexible, high-performance, and rigid couplings at any RPM.

By Nikolai Shelkovenko, 4 weeks ago March 5, 2026

Separator / Centrifuge Balancing Calculator

Free online calculator for separator and centrifuge balancing per ISO 21940. Enter bowl mass, speed, balance grade, and diameter to get permissible unbalance, eccentricity, centrifugal force, and g-force.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Section Moment of Inertia Calculator | Free Online Tool

Free online calculator for cross-section properties. Calculate moment of inertia I, section modulus W, area, and radius of gyration for circle, rectangle, I-beam, channel, and hollow sections.

By Nikolai Shelkovenko, 4 weeks ago March 5, 2026

Seal Groove Tolerances — ISO 3601 | Free Online Tool

Free online seal groove tolerance lookup per ISO 3601. Enter seal type and shaft/bore diameter to see groove dimensions, tolerances, and surface finish requirements.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Safety Valve Sizing Calculator | ISO 4126 | Relief Valve

Free safety valve sizing calculator per ISO 4126 / API 520. Calculate required orifice area, standard orifice letter, and minimum valve size for gas, steam, and liquid service.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Safety Factor Calculator — Free Online FoS Tool | Vibromera

Free online safety factor calculator. FoS = σ_allow / σ_actual. Enter material strength and actual stress. Static and fatigue factor recommendations included.

By Nikolai Shelkovenko, 4 weeks ago March 5, 2026

RUL Prognostics Calculator | ISO 13381 | Vibromera

Free online RUL prognostics calculator per ISO 13381. Enter trend data points, select a regression model (linear, exponential, polynomial), extrapolate to failure threshold and estimate remaining useful life with confidence.

By Nikolai Shelkovenko, 4 weeks ago March 5, 2026

Rubber Mount Calculator — Shore Hardness to Stiffness | Vibromera

Free online rubber mount calculator. Enter Shore A hardness, mount dimensions, and static load to calculate stiffness, natural frequency, and static deflection for rubber vibration isolators.

By Nikolai Shelkovenko, 4 weeks ago March 5, 2026

RPM to rad/s Converter | Angular Velocity | Free Online

Free online angular velocity converter. Convert between RPM, rad/s, deg/s, rev/s and Hz instantly. Shows all units simultaneously. ω = 2πn/60.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Rotor Moment of Inertia Calculator | Free Tool #073

Calculate moment of inertia for solid cylinder, hollow cylinder, disc, and sphere. Enter dimensions and material density to find J, mass, radius of gyration.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Rotor Deflection Calculator — Shaft Sag on Supports

Calculate shaft deflection (sag) on two supports under self-weight and applied loads. Enter shaft dimensions and material for maximum deflection in μm.

By Nikolai Shelkovenko, 4 weeks ago March 5, 2026

Rotor Critical Speed Calculator | Shaft Natural Frequency

Free online calculator for rotor critical speed and shaft natural frequency. Compute first critical RPM for simply supported, cantilever, and fixed-fixed shafts with central mass or distributed mass (Rayleigh).

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Rotor Acceleration Time Calculator | Free Tool #078

Calculate time to accelerate or decelerate a rotor. Enter moment of inertia J, speed change, available torque. t = J * delta_omega / T.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Roller Chain Calculator | ISO 606 Dimensions | Vibromera

Free online ISO 606 roller chain dimensions and capacity calculator. Look up chain dimensions, breaking load, and working load for 06B through 48B series chains.

By Nikolai Shelkovenko, 4 weeks ago March 5, 2026

Rivet Joint Strength Calculator — Shear, Bearing, Tear-out

Free online calculator for rivet joint strength. Enter rivet diameter, number, plate thickness, and material to check shear, bearing, and tear-out failure modes.

By Nikolai Shelkovenko, 4 weeks ago March 5, 2026

Risk Assessment Matrix | ISO 45001 / ISO 31000

Free interactive 5×5 risk assessment matrix per ISO 45001 / ISO 31000. Calculate risk score from severity and likelihood, view color-coded risk levels and recommended actions.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Reynolds Number Calculator | Free Online Re Tool | Vibromera

Free Reynolds number calculator. Bidirectional: from velocity or flow rate. Visual laminar/transition/turbulent indicator. Entry length calculation. Common fluid viscosity presets.

By Nikolai Shelkovenko, 4 weeks ago March 5, 2026

Permissible Residual Unbalance Calculator | ISO 21940-11 | Free Online Tool

Free online calculator for permissible residual unbalance per ISO 21940-11 (formerly ISO 1940). Enter rotor mass, speed, and balance quality grade G to get maximum allowed unbalance in g·mm and eccentricity.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Pump Head & Power Calculator | Free Online Tool

Free online pump head & power calculator. Calculate pump power from flow rate, head, density, and efficiency. P=ρgQH/η.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Weld Quality Levels ISO 5817 Checker | Free Online Tool

Free online ISO 5817 weld quality level checker. Enter imperfection type and measured value to determine if the weld meets quality level B, C, or D requirements.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Pump Cavitation Frequency Estimator

Free online calculator for pump cavitation frequency estimation. Calculate vane pass frequency (BPF), shaft frequency, expected cavitation frequency range, and NPSH margin with risk indicator.

By Nikolai Shelkovenko, 4 weeks ago February 15, 2026

Calculators

Engineering calculators for vibration analysis and mechanical engineering