f MillwrightIQ — The Digital Toolbox for Industrial Tradespeople
Built by a Millwright · For the Trade

The Digital Toolbox for Working Millwrights

Fast, field-tested calculators and references for the real work — maintenance, breakdowns, and shutdowns. Built by a millwright who's still on the floor.

Built by a Working Millwright
No theory. No fluff. Just the calculations, references, and tools we actually use on the floor.

Used by apprentices, journeymen, and maintenance teams to solve real shop-floor problems in seconds.

Open Calculators Apprentice Hub →
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Pick the job in front of you and go straight to the right tools.

Bearings Motors Pumps & Hydraulics Shafts & Couplings Conveyors Gearboxes Belts & Sheaves Chains & Sprockets Rigging & Lifting Apprenticeship
Most Used Tools

The calculators millwrights reach for first. One tap and you're working.

Learn the Trade

Practical, field-tested resources — not blog filler.

Apprentice Hub
Year 1–4 study guides, trade-math quizzes, and Red Seal exam prep — written by someone on the same path.
Field Articles
Straight-talk how-tos: bearing fits, pulley RPM, first-year survival — read it before the next breakdown.
Bearings
Calculators
Install & Removal
  • Never hammer a bearing onto a shaft — always use a bearing driver.
  • Press the inner ring for shaft fits; press the outer ring for housing fits.
  • Press fits need a bearing heater or hydraulic press — heat to no more than 250°F (120°C).
  • Keep it clean: dirt, burrs, and rust change the fit and give false readings.
Read: Understanding Bearing Fits
References & Learning

Fit types, bore & interference terms, install temperatures, and bearing exam questions already live in the Apprentice Hub glossary and quizzes.

All Articles
Lubrication & Failure Reference Coming Soon

Dedicated lubrication intervals and common bearing-failure references aren't in the toolbox yet. For now, the bearing fits article explains why the wrong fit runs hot and fails a bearing early. Structured lube & failure guides are a planned addition.

Bearing Troubleshooting Coming Soon

A guided troubleshooting flow (noise, heat, vibration → likely cause) is planned. No AI — it'll be a straightforward reference built from field-tested checks.

Motors
Electrical hazard. Motors carry live electrical energy. Always de-energize and verify lockout/tagout before touching a motor. Electrical connections, testing, and repairs must be done by a qualified electrician per your site's procedures. This is a mechanical reference, not electrical work instructions.
Calculators
Motor Speed Reference — 60 Hz Synchronous
  • 2-pole — 3600 RPM
  • 4-pole — 1800 RPM
  • 6-pole — 1200 RPM
  • 8-pole — 900 RPM

Actual induction-motor speed runs slightly below synchronous because of slip (typically ~1–5% under load).

Inspection Checklist
  • Verify lockout/tagout before any work.
  • Check mounting bolts and check for soft foot.
  • Inspect coupling condition.
  • Check shaft alignment.
  • Check lubrication condition.
  • Inspect for abnormal heat, noise, and vibration.
  • Confirm rotation direction before coupling or loading.
Common Symptoms
  • Overheating
  • Excessive vibration
  • Bearing noise
  • Low speed
  • Tripping the overload
  • Coupling wear
References & Learning

Motor speed, alignment, and coupling topics are covered in the Apprentice Hub quizzes and exam prep, plus the field articles.

Read: Pulley RPM & Belt Speed
All Articles
Pumps & Hydraulics
Calculators
Pump Inspection Checklist
  • Verify lockout/tagout before any work.
  • Check baseplate and mounting bolts.
  • Inspect coupling and alignment.
  • Confirm suction and discharge valves are in the correct position.
  • Check lubrication level and condition.
  • Inspect seals, packing, and leakage.
  • Check for abnormal vibration, heat, or noise.
  • Confirm correct rotation before full operation.
Common Pump Symptoms
  • No flow
  • Low flow
  • Low pressure
  • Cavitation
  • Excessive vibration
  • Overheating
  • Seal leakage
  • Motor overload
Quick Reference
  • Cavitation signs: gravel/rattling noise, vibration, and erratic or falling discharge pressure — often from a starved suction.
  • Suction-side restriction: check for a clogged strainer, a closed or partly-closed suction valve, a collapsed hose, an air leak, or a low supply level.
  • Priming: fill the pump and suction line with liquid before starting; never run a centrifugal pump dry; vent trapped air.
  • Alignment & soft foot: check coupling alignment and soft foot before final bolt-down, then recheck once the unit reaches operating temperature.
References & Learning

Pump alignment, coupling, and hydraulic-power topics are covered in the Apprentice Hub quizzes and exam prep, plus the field articles.

All Articles
Gearboxes
Calculators
Gearbox Inspection Checklist
  • Verify lockout/tagout.
  • Check mounting bolts, base, and soft foot.
  • Inspect coupling condition and alignment.
  • Check oil level before startup.
  • Confirm the correct lubricant type and viscosity.
  • Inspect breathers, seals, gaskets, and drain plugs.
  • Check for leaks and oil contamination.
  • Inspect for abnormal heat, noise, and vibration.
  • Confirm input and output shaft rotation.
  • Check guards before returning equipment to service.
Common Gearbox Symptoms
  • Excessive heat
  • Abnormal whining or grinding
  • Excessive vibration
  • Oil leakage
  • Foaming oil
  • Metal particles in the lubricant
  • Backlash or excessive shaft movement
  • Incorrect output speed
  • Repeated bearing or seal failure
Quick Reference
Output RPM = Input RPM ÷ Gear Ratio
  • Higher numerical ratio → generally lower output speed and higher available torque.
  • Lower numerical ratio → generally higher output speed and less torque multiplication.
  • Do not mix incompatible lubricant types.
  • Overfilling can cause heat, foaming, leakage, and churning losses.
  • Underfilling can starve gears and bearings.
  • A blocked breather can raise internal pressure and force oil past the seals.
  • Alignment and soft-foot problems can cause repeated coupling, bearing, and seal failures.

Always follow the manufacturer's data. Actual torque capacity, service factor, lubricant selection, and allowable loading must follow the gearbox manufacturer's specifications — this guidance is general and does not replace the nameplate or manual.

Troubleshooting Flow
  • Running hot: verify load, oil level, lubricant grade, ventilation, alignment, and bearing condition.
  • Noisy: inspect oil condition, gear wear, bearings, backlash, mounting, and alignment.
  • Leaking: check oil level, breather, seals, shaft condition, housing joints, and internal pressure.
  • Wrong output speed: verify motor RPM, gear ratio, pulley ratio, rotation, and internal damage.
References & Learning

Gear ratio, alignment, and lubrication topics are covered in the Apprentice Hub quizzes and exam prep, plus the field articles.

All Articles
Belts & Sheaves
Calculators
Inspection Checklist
  • Verify lockout/tagout.
  • Inspect guards before removal and before return to service.
  • Check sheaves for cracks, chips, worn grooves, rust, and damage.
  • Check belt condition for glazing, cracking, fraying, separation, and contamination.
  • Confirm the correct belt cross-section and matched belt set.
  • Inspect sheave alignment.
  • Check shaft and bearing condition.
  • Check sheave and bushing security.
  • Verify belt tension.
  • Rotate the system by hand before startup.
  • Recheck tension after the recommended run-in period.
Common Symptoms
  • Belt squeal
  • Belt slipping
  • Excessive belt dust
  • Uneven belt wear
  • Belt rollover
  • Cracked or glazed belts
  • Hot bearings
  • Excessive vibration
  • Repeated belt failure
  • Incorrect driven speed
Quick Reference
Driven RPM = Driver Diameter × Driver RPM ÷ Driven Diameter
  • Larger driven sheave → generally lower output speed.
  • Smaller driven sheave → generally higher output speed.
  • Use sheave pitch diameter, not outside diameter, when the manufacturer requires it.
  • Replace belts in a multi-belt drive as a matched set.
  • Do not mix new and used belts in the same drive.
  • Excessive tension can overload bearings and shafts.
  • Insufficient tension can cause slip, heat, glazing, and poor power transmission.
  • Misalignment can cause edge wear, vibration, belt rollover, and shortened belt life.
  • Oil and grease contamination can damage belts and cause slippage.

Follow the manufacturer's data. Final belt selection, tension, horsepower capacity, service factor, and minimum sheave diameter must follow the belt and equipment manufacturer's specifications.

Troubleshooting Flow
  • Belt squeal or slip: check load, tension, contamination, groove wear, belt condition, and sheave size.
  • Uneven wear: check alignment, groove wear, shaft position, matched belts, and bearing movement.
  • Repeated belt failure: check sheave diameter, overload, tension, alignment, contamination, and vibration.
  • Hot bearings: check excessive belt tension, alignment, lubrication, bearing condition, and shaft load.
  • Wrong output speed: verify motor RPM, driver sheave, driven sheave, belt slip, and tachometer reading.
References & Learning

Pulley/sheave speed, alignment, and belt topics are covered in the Apprentice Hub quizzes and exam prep, plus the field articles.

Read: Pulley RPM & Belt Speed
All Articles
Shafts & Couplings
Calculators
Inspection Checklist
  • Verify lockout/tagout.
  • Inspect shaft condition for scoring, corrosion, burrs, and impact damage.
  • Check shaft straightness and runout.
  • Inspect coupling hubs, keys, keyways, inserts, grids, discs, and fasteners.
  • Confirm the correct coupling type and rating.
  • Check hub fit and shaft fit.
  • Check key fit and keyway condition.
  • Inspect base, mounting bolts, grout, and shims.
  • Check for soft foot before final alignment.
  • Confirm rough alignment before precision alignment.
  • Check pipe strain or connected-equipment strain.
  • Tighten fasteners using the correct sequence.
  • Recheck alignment after tightening.
  • Install guards before returning equipment to service.
Common Symptoms
  • Repeated coupling insert failure
  • Excessive vibration
  • Hot bearings
  • Seal leakage
  • Broken coupling bolts
  • Fretting around hubs
  • Loose keys
  • Worn keyways
  • Shaft scoring
  • Excessive runout
  • Alignment readings that change after tightening
Quick Reference
  • Angular misalignment: shaft centerlines intersect at an angle.
  • Offset (parallel) misalignment: shaft centerlines are parallel but displaced.
  • Most real conditions contain both angular and offset misalignment.
  • Correct soft foot before final alignment.
  • Pipe strain can move equipment after alignment.
  • Thermal growth can change running alignment.
  • Coupling flexibility does not remove the need for accurate alignment.
  • Excessive interference fit can damage hubs, shafts, and bearings.
  • Loose fits can cause fretting, key damage, and hub movement.
  • Check shaft runout before blaming the alignment instrument.

Follow the manufacturer's data. Final alignment tolerances, coupling limits, fits, torque values, and thermal-growth targets must follow the equipment and coupling manufacturers' specifications.

Troubleshooting Flow
  • Readings change after tightening: check soft foot, base distortion, shim condition, bolt sequence, and pipe strain.
  • Coupling repeatedly fails: check alignment, overload, shaft movement, coupling selection, lubrication, and installation.
  • Hot bearings after alignment: check residual misalignment, excessive belt or pipe load, lubrication, fit, and bearing condition.
  • Hub moves on shaft: check fit, key condition, retaining method, shaft damage, and installation procedure.
  • High vibration remains: check runout, looseness, balance, bent shaft, coupling damage, resonance, and bearing condition.
References & Learning

Alignment, coupling, keyway, and fit topics are covered in the Apprentice Hub quizzes and exam prep, plus the field articles.

All Articles
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Core Tools

Live Calculators

Real calculations millwrights use every day on the shop floor. Enter your values and get instant results.

⚙️
RPM & Pulley Speed
Driven Pulley Speed
—RPM

How It Works

Driven RPM = (Driver Dia × Driver RPM) ÷ Driven Dia

Use this to find the output speed of a belt-driven shaft when you know the driver pulley size, driver speed, and driven pulley size.

Common Motor Speeds

  • 2-pole motor 3600 RPM
  • 4-pole motor 1800 RPM
  • 6-pole motor 1200 RPM
  • 8-pole motor 900 RPM
⚡ Always verify belt type and tension before running. Underspeed or overspeed can damage bearings and equipment.
🔩
Gear Ratio Calculator
Gear Ratio
—: 1

Gear Ratio Basics

Ratio = Driven Teeth ÷ Drive Teeth
Output RPM = Input RPM ÷ Ratio
  • Ratio > 1 Speed reduction
  • Ratio < 1 Speed increase
  • Ratio = 1 1:1 (same speed)
  • Higher ratio More torque
📐 Count gear teeth carefully — one tooth off changes the entire ratio. Use a reference mark and count twice.
🔧
Bolt Torque Calculator
Estimated Assembly Torque
—ft-lbs

Torque Reference

T = K × D × F
K=nut factor, D=diameter, F=clamp load

Grade ID Markings

  • Grade 2 No marks
  • Grade 5 3 radial lines
  • Grade 8 6 radial lines
⚠️ These are general reference values. Always follow OEM torque specs for critical machinery fasteners.
🌡️
Thermal Expansion
Change in Length
—inches

Why This Matters

ΔL = α × L × ΔT
α=coefficient, L=length, ΔT=temp change

Critical for shaft alignment on hot equipment. A shaft that's cold-aligned may misalign significantly at operating temperature.

  • Pump shafts Check at temp
  • Couplings Add thermal gap
  • Pipe anchors Allow expansion
  • Gearbox mounts Check cold offset
🎯 For precision alignment work, always get operating temperature readings from the equipment operator before aligning.
📐
Shaft Alignment Tolerance Checker
Alignment Status
—

Tolerance Guidelines

Higher RPM = Tighter Tolerance Required
  • Under 1800 RPM Offset ≤ 5 mils
  • 1800–3600 RPM Offset ≤ 3 mils
  • Over 3600 RPM Offset ≤ 1.5 mils
  • Angularity ≤ 1 mil/inch
🎯 1 mil = 0.001 inch. Always check both horizontal and vertical planes before declaring alignment acceptable.
🔄
V-Belt Length Calculator
Required Belt Length
—inches

Belt Length Formula

L = 2C + 1.57(D+d) + (D-d)²÷4C
  • C = Center distance inches
  • D = Large pulley dia inches
  • d = Small pulley dia inches
📏 Add 1–2% to calculated length for belt stretch and installation. Always check manufacturer's cross-reference for exact belt number.
📏
Unit Converter — Imperial ↔ Metric
Converted Value
—

Common Shop Conversions

  • 1 inch 25.4 mm
  • 1 lb-ft torque 1.356 N·m
  • 1 PSI 6.895 kPa
  • 1 HP 745.7 watts
  • 1 RPM 0.1047 rad/s
🔁 Always double-check unit conversions on critical measurements. A metric/imperial mix-up can cause serious equipment damage.
🪛
Drill & Tap Chart
Drill & Tap Specs
Select a thread size above to see specs.

How to Use

Select thread → See tap drill size
  • 75% thread Standard strength
  • 50% thread Softer materials
  • UNC Coarse thread
  • UNF Fine thread
🪛 Always use the correct tap drill for 75% thread engagement. Under-drilling causes tap breakage; over-drilling weakens threads.
🔒
Pro Tool

Conveyor Speed is included in MillwrightIQ Pro.

🏗️
Conveyor Speed Calculator
Throughput
—TPH

Conveyor Capacity Formula

TPH = (Width × Depth × FPM × Density) ÷ 2000
  • Belt speed FPM (feet per minute)
  • Material depth Inches on belt
  • Belt width Inches across belt
  • Bulk density lbs per cubic foot
  • Assumes rectangular material cross-section
  • Width × Depth Cross section (ft²)
  • ÷ 2000 Converts lbs to tons
    • ⚠️ Always account for conveyor incline/decline angle. Steep angles reduce effective capacity significantly.
    🔒
    Pro Tool

    Bearing Fit is included in MillwrightIQ Pro.

    ⚡
    Bearing Fit Calculator
    Fit Type
    —

    Fit Types

    Interference = Shaft Dia − Bore Dia
    • Clearance fit Bore > Shaft (loose)
    • Transition fit Very close tolerance
    • Interference fit Shaft > Bore (press)
    • Typical press 0.0001–0.0005"
    🔩 Press fits require bearing heater or hydraulic press. Never hammer a bearing directly onto a shaft — always use a bearing driver.
    🔒
    Pro Tool

    Key & Keyseat Reference is included in MillwrightIQ Pro.

    🔑
    Key & Keyseat Reference
    Keyway Dimensions
    Select a shaft diameter above to see specs.

    ANSI Standard Keyways

    Key Width = ~1/4 of shaft diameter
    • Keyway Cut in shaft
    • Keyseat Cut in hub/bore
    • Square key Up to 6.5" shaft
    • Fit Side fit is critical
    📐 Always measure the actual key and keyway with micrometers. ANSI standards are nominal — actual fit determines torque capacity.
    🔒
    Pro Tool

    Hydraulic Power is included in MillwrightIQ Pro.

    💧
    Hydraulic Power Calculator
    Hydraulic Horsepower
    —HP

    Hydraulic Power Formula

    HP = (PSI × GPM) ÷ 1714
    • PSI System pressure
    • GPM Flow rate
    • 1714 Hydraulic constant
    • Efficiency Typically 85–90%
    ⚠️ Always add 15–20% to calculated HP for system inefficiency. Undersized pumps overheat and fail prematurely.
    🔒
    Pro Tool

    L10 Bearing Life is included in MillwrightIQ Pro.

    ⚡
    L10 Bearing Life Calculator
    For combined radial and axial loading, P must already include the bearing-specific X/Y/e equivalent-load factors from manufacturer data.
    L10 Rating Life
    —hours

    L10 Life Formula

    L10 = (C / P)^p million revolutions
    L10h = 10⁶ × (C / P)^p ÷ (60 × n)
    p = 3 for ball bearings, p = 10/3 for roller bearings · n = RPM

    This calculator computes basic L10 life at 90% reliability. It does not guarantee service life.

    • Use the same units for C and P (lbs)
    • P must include the bearing equivalent dynamic load factors X, Y, and e for combined loading
    • Results assume uniform loading, proper lubrication, and normal operating temperature
    • Excludes contamination, misalignment, internal clearance effects, shock loading, variable load, and modified-life factors
    • Typical bearing life design targets
      (application dependent)
      • General machinery 20,000–50,000 hrs
      • Intermittent service ~10,000–25,000 hrs
      • Continuous-duty equipment often >40,000 hrs
    ⚡ C rating is on the bearing datasheet. If you double the load, life drops to 1/8th for ball bearings. This L10 result is a basic 90% reliability estimate, not a guarantee of service life.
    🔒
    Pro Tool

    Sheave Speed / Diameter is included in MillwrightIQ Pro.

    🔘
    Sheave Speed / Diameter Calculator
    Result
    —
    Basis: N1 × D1 = N2 × D2;
    N2 / N1 = D1 / D2;
    D2 / D1 = N1 / N2;
    Speed ratio: N1 : N2
    Diameter ratio: D2 : D1
    Assumptions: pitch diameters are used, belt slip is zero, operating speed is steady, and belts are matched and properly tensioned.
    Limitations: This tool does not select belt section, groove count, horsepower capacity, center distance, wrap angle, belt length, or minimum allowable sheave diameter. Verify the result using the belt and sheave manufacturer’s catalog.
    Choose an available manufacturer pitch diameter, then recalculate the resulting driven RPM.

    Sheave Speed Law

    N1 × D1 = N2 × D2
    • N1 = Driver RPM known
    • D1 = Driver pitch diameter known
    • N2 = Driven RPM solve or input
    • D2 = Driven pitch diameter solve or input
    📐 Choose an available manufacturer pitch diameter, then recalculate the resulting driven RPM.
    🔒
    Pro Tool

    Press Fit Force is included in MillwrightIQ Pro.

    💪
    Press Fit Force Calculator
    Estimated Press-Fit Assembly Force
    —lbf

    Press Fit Formula (Plane Strain)

    δr = p·a·[Cs + Ch]
    F = μ·p·π·d·L
    Plane strain assumption: axial strain εz = 0. a=shaft radius, b=hub outer radius, δr=diametral interference / 2
    • Solid shaft Cs (1−νs)/Es
    • Hollow shaft Cs ((a²+c²)/(a²−c²) − νs)/Es
    • Hub Ch ((b²+a²)/(b²−a²) + νh)/Eh
    • Typical press fit 0.001–0.003"
    • Contact force uses μ at the bore-to-shaft interface
    Reference estimate only. Assumes uniform pressure, elastic materials, cylindrical geometry, plane strain, and no edge effects. Actual press force depends on dimensional tolerances, surface finish, material properties, temperature, lubrication, lead-in geometry, alignment, and component stiffness. This estimate does not replace a hub hoop-stress, shaft-stress, or yielding analysis.
    🔒
    Pro Tool

    Bolt Pattern is included in MillwrightIQ Pro.

    🔩
    Bolt Pattern Tightening Sequence

    Tightening Sequences

    Always cross-pattern — never clockwise circle
    • 4 bolt 1→3→2→4
    • 6 bolt 1→4→2→5→3→6
    • 8 bolt 1→5→2→6→3→7→4→8
    • 12 bolt 1→7→2→8→3→9…
    🔩 Torque in 3 passes: 30%, 60%, 100% of spec. Final pass clockwise to verify no bolts missed.
    Full Library

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    ⚙️
    RPM Calculator
    Belt & pulley driven speed
    Free
    🔩
    Gear Ratio
    Teeth count to ratio
    Free
    🔧
    Bolt Torque
    Grade-based torque specs
    Free
    🌡️
    Thermal Expansion
    Material length change
    New
    ⭐ TOP RATED
    📐
    Shaft Alignment
    Tolerance checker
    Free
    🔄
    V-Belt Length
    Center distance calculator
    Pro
    🏗️
    Conveyor Speed
    FPM & TPH calculator
    Pro
    ⚡
    Bearing Fit
    Interference fit calc
    Free
    📏
    Unit Converter
    Imperial ↔ Metric
    Pro
    🔑
    Keyway & Keyseat
    Width & depth lookup
    Free
    🪛
    Drill & Tap Chart
    Size reference lookup
    Pro
    💧
    Hydraulic Power
    PSI / GPM / HP calc
    Pro
    ⚡
    L10 Bearing Life
    Rating life in hours
    Pro
    🔘
    Sheave Speed / Diameter
    Find sheave pitch dia or RPM
    Pro
    💪
    Press Fit Force
    Lamé press tonnage calc
    Pro
    🔩
    Bolt Pattern
    Tightening sequence diagram
    Study Center

    Apprentice Hub

    Everything you need to get from 1st year to Journeyman. Study guides, quizzes, and exam prep — written by someone on the same path.

    🎓

    Select Your Apprentice Year

    Choose your current year to see your topics, study guide, and what to focus on next.

    Select your year above to see your study plan.

    📘 Year 1 — Foundation
    • ✅ Trade Safety & OSHA Requirements
    • ✅ Hand Tools & Proper Use
    • ✅ Basic Blueprint Reading
    • ✅ Measuring Tools (micrometers, calipers)
    • ✅ Fasteners — Bolts, Nuts, Threads
    • ✅ Basic Rigging & Lifting
    • ✅ Introduction to Bearings
    • ✅ Shop Math — Fractions & Decimals
    • ✅ Material Identification (steel grades)
    • ✅ Lubrication Basics
    Year 1 Focus: Safety, tools, and measurement. Master your micrometer — you'll use it every day for the rest of your career.
    📗 Year 2 — Mechanical Systems
    • ✅ Bearing Installation & Removal
    • ✅ Shaft & Coupling Alignment Basics
    • ✅ V-Belt & Chain Drive Systems
    • ✅ Gearbox Identification & Oil Types
    • ✅ Hydraulics — Basic Principles
    • ✅ Pneumatics — Air Systems
    • ✅ Welding Fundamentals (MIG/stick)
    • ✅ Advanced Blueprint Reading
    • ✅ Precision Measurement — Dial Indicators
    • ✅ Preventive Maintenance Concepts
    Year 2 Focus: Mechanical systems. Learn how power flows from motor to shaft — belts, chains, gears, and couplings.
    📙 Year 3 — Advanced Skills
    • ✅ Advanced Shaft Alignment (laser/dial)
    • ✅ Gearbox Overhaul & Rebuild
    • ✅ Vibration Analysis Basics
    • ✅ Conveyor Systems — Installation
    • ✅ Hydraulic System Troubleshooting
    • ✅ Pump Types & Applications
    • ✅ Motor & Drive Systems
    • ✅ Advanced Rigging & Crane Signals
    • ✅ Thermal Imaging Basics
    • ✅ Root Cause Analysis (RCA)
    Year 3 Focus: You're doing the real work now. Alignment, troubleshooting, and rebuilds. Document everything you do — it builds your credibility.
    📕 Year 4 — Journeyman Prep
    • ✅ Complete Machinery Installation
    • ✅ Laser Alignment — Advanced Methods
    • ✅ Predictive Maintenance Programs
    • ✅ Millwright Trade Calculations Review
    • ✅ Journeyman Exam Topics Review
    • ✅ Leadership & Mentoring Apprentices
    • ✅ Work Orders & Documentation
    • ✅ OSHA 30 — Advanced Safety
    • ✅ Contractor & Union Regulations
    • ✅ Job Site Management Basics
    Year 4 Focus: Journeyman exam prep and leadership. Start thinking like a journeyman — plan the job, supervise safely, and mentor the next class.
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    Free Tier
    • ✓ RPM & Pulley Calculator
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    • ✓ Unit Converter
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    • ★ L10 Bearing Life Calculator
    • ★ Sheave Speed / Diameter Calculator
    • ★ Press Fit Force Calculator
    • ★ Bolt Pattern Sequence
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