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Hydraulic Pump Flow Rate Calculator

Hydraulic Pump Flow Rate Calculator
Pump displacement Vd (cm³/rev) Pump speed N (rpm) Volumetric efficiency ηv (%)

August 29, 2025
Fluid Power — Piston Area Calculator
Fluid Power — Piston Area Calculator

Quick conversions and formulas used:
- Area (circle): A = π·d²/4
- Force: F = P · A (use consistent units)
- Pressure units: 1 MPa = 1 N/mm² = 10 bar ≈ 145.038 psi
Operation
August 29, 2025
Belt Drive Design Calculator

Belt Drive Design Calculator
Power to be transmitted (kW) Driver pulley diameter D₁ (mm) Driven pulley diameter D₂ (mm) Driver speed N₁ (rpm) Center distance a (mm) Coefficient of friction μ Mass of belt per unit length (kg/m) Maximum allowable stress (N/mm²)

August 29, 2025
Chain Drive Design Calculator

Chain Drive Design Calculator
Power to be transmitted (kW) Driver sprocket speed, N₁ (rpm) Speed ratio (i = N₁/N₂) Number of teeth on driver sprocket (Z₁) Chain pitch, p (mm) Center distance, a (mm)

August 29, 2025
Bearing Life Expectancy Calculator (L10)

Bearing Life Expectancy (L₁₀) Calculator

All stresses/loads in N, diameters irrelevant here. Enter dynamic rating C in N, speeds in rpm.

Dynamic load rating, C [N] Bearing type / exponent p Use C from manufacturer catalog (dynamic radial load rating).

Radial load, F_r [N] Axial load, F_a [N] Enter axial load if present. If none, leave as 0.

Load factors preset (X, Y) Custom X factor: Custom Y factor:

Speed, n [rpm] Target reliability Life result will be adjusted for chosen reliability.

Direct equivalent dynamic load P (optional) [N] Units note

August 29, 2025
Spring Design Calculator (Compression Spring)

Compression Spring — Design & Performance Calculator

Units: mm (lengths), N (force), MPa = N/mm² (stress). Enter shear modulus G in GPa (e.g. 79 for steel spring wire ≈ 79 GPa).

Mode

Geometry → Performance

Wire diameter, d [mm] Mean coil diameter, D [mm] Active coils, N_a

Shear modulus, G [GPa] Free length L_free [mm] (optional) Total coils for solid length (N_t) — default = N_a + 2

Load (force) F [N] Max allowable shear stress (for safety check) [MPa] (optional) Friction coefficient for axial loss? (not used; info only)

Design → Geometry

Required spring rate k [N/mm] Desired mean diameter D [mm] (or leave and choose d option)

Choose unknown to compute: Provide known value for the other:

Shear modulus G [GPa] Show recommended safety factor for stress (optional)

August 29, 2025
Fatigue Life Prediction Calculator

Fatigue Life Prediction

Use Basquin’s S–N law for life: σ_a = A · N^b → N = (σ_a / A)^(1/b). Use Goodman mean-stress correction if mean stress ≠ 0.

Material / Basquin
Fatigue coefficient A (MPa) — Basquin numerator Fatigue exponent b (negative) — Basquin exponent Ultimate tensile strength, S_u (MPa) Endurance limit S_e (MPa) (optional for fully-reversed)

Global options
Apply Goodman mean-stress correction? Assumed cycles-per-second (for converting cycles → time) Number of load levels (1–5) for Miner’s rule

Load Levels (for each level enter stress amplitudes and mean stress and cycle count)

August 29, 2025
Press Fit Force & Stress Calculator

Press Fit Force & Stress Calculator
Shaft Diameter (d) [mm]: Interference Length (L) [mm]: Interference (Δd) [mm]: Young’s Modulus (E) [N/mm²]: Poisson’s Ratio (ν): Friction Coefficient (μ):

August 29, 2025
Punching & Blanking Force Calculator

Punching & Blanking Force Calculator
Perimeter of Cut (L) [mm]: Sheet Thickness (t) [mm]: Shear Strength (τ) [N/mm²]: Safety Factor (1.1–1.3 typical):

August 29, 2025
Sheet Metal Bend Allowance Calculator

Sheet Metal Bend Allowance Calculator
Sheet Thickness (T) [mm]: Bend Radius (R) [mm]: Bend Angle (θ) [degrees]: K-Factor (0.3 – 0.5 typical):

August 29, 2025