HPU vs Bench Math

THE FLUID POWER TERMINAL. HPU-9000 packs the formulas fluid power engineers actually use into a phosphor-green CRT terminal — 21 live calculators, with every input and output switchable between US and metric units. CYLINDERS — bore/annulus area, push & pull force, stroke speed and time, return-line flow intensification, cylinder power, tube sizing with velocity guidance, air cylinder consumption. PUMPS & MOTORS — pump flow, hydraulic power and drive power required, motor torque and speed (theoretical vs. actual), torque⇄power, efficiency. VEHICLE DRIVE SIZING — a guided hydrostatic-drive worksheet: rolling and grade resistance, tractive effort, wheel and motor torque, traction check that warns before your wheels spin, motor RPM. Save machines by name and reload them at the bench. FLUIDS & THERMAL — oil volume, compressibility, fluid weight, SUS⇄cSt viscosity, reservoir heating, heat load vs. cooling balance, pump bearing life. PLUS — a full unit converter and the complete formula reference. Engineering-grade: every formula is computed from exact physical constants, not rounded shop approximations, and verified against an automated test suite. Green or amber phosphor. Scanlines optional. No account, no ads, works offline — like a good terminal should.

Bench Math is the arithmetic of a working shop, on your phone, with no signal needed. Ten tools built for machinists, metal fabricators and woodworkers. No account, no subscription, no internet. FREE, COMPLETE, NO PURCHASE NEEDED • Tap & Drill: the right drill for common UNC, UNF and ISO metric threads, at any thread engagement, chosen from the drill sets you actually own, plus clearance holes • Board Feet: timber volume and cost, with the quarter sizes yards quote • Right Triangle: solve from any two knowns, for miters, rise and run, bracing BENCH MATH PRO, ONE PAYMENT • Speeds & Feeds: RPM, feed rate and chip load for 16 materials, including the radial chip thinning correction that most charts leave out • Cut List, linear: nest parts into bar and board stock, kerf accounted for • Cut List, sheet: kerf-aware, grain-aware nesting for plywood and panels, with a cutting diagram • Bend Allowance: flat patterns with K-factor, bend deduction, outside setback • Bolt Circle: X and Y for every hole, ready for a DRO or a G-code file • Belt & Pulley: belt length, ratio and the wrap angle that decides slip • Gear Train: compound ratios, output speed and torque • Saved projects, and PDF or CSV export to hand to whoever is at the saw BUILT FOR THE SHOP • Works fully offline. Nothing is uploaded, because there is no server • Type fractions the way you write them: 3 1/2, 3-1/2, 7/8, or decimals • Imperial or metric, following your region, and switchable any time • Answers update as you type. No calculate button, no ads • In English, French, Spanish, Japanese and Chinese HONEST ABOUT WHAT IT IS Speeds, feeds and K-factors are starting points, not specifications. They move with your tooling, your machine and your material. The screens that give those values say so, and tell you to try a test cut or a test bend first. Bench Math Pro is a one-time purchase, not a subscription. Family Sharing is on. Privacy Policy: https://benchmath-website.vercel.app/privacy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/