Louisville Beauty Academy (LBA), The College of Human Service of Di Tran University, proudly shares Chapter X of THE COMPLETE NAIL LICENSING MASTER BOOK — 2025 Edition.
As part of our mission to humanize education and remove fear from the licensing process, we are releasing all 50 chapters online for free for students, schools, ESL learners, and future beauty professionals across the nation.
Each chapter is part of the most comprehensive nail licensing textbook ever created, designed specifically for State Board Theory & Practical and built on our core philosophies:
YES I CAN™ (courage, confidence) and
I HAVE DONE IT™ (achievement, professionalism).
Louisville Beauty Academy continues to adapt and adopt at light speed, providing not only this complete textbook but also upcoming videos, visual guides, and step-by-step practical demonstrations, all aimed at ensuring every learner feels supported and empowered.
LBA is proud to serve as a true YES I CAN™ institution and a Center of Excellence in beauty education.
CHAPTER 5 — ELECTRIC FILING & EQUIPMENT SAFETY
Louisville Beauty Academy (LBA) — YES I CAN™ Use Tools Safely & Professionally
Electric filing (e-file) is one of the most powerful tools in nail work.
Used correctly, it saves time, increases precision, and makes services cleaner and smoother.
Used incorrectly, it can damage natural nails, cause pain, or cause injury.
Louisville Beauty Academy teaches all students:
“Electric filing is a skill of control, not speed.”
This chapter gives you simple, safe, liability-smart guidance on everything you need for licensing and safe salon work.
You do NOT need to drill deeply.
You do NOT need high speed.
You DO need gentle, careful, LBA-standard technique.
And yes, YOU CAN™ master it safely.
🔑 KEYWORDS WITH DEFINITIONS, EXAMPLES, USES & SENTENCES
1. E-File (Electric File)
Meaning: A handheld electric tool used to shape and refine nails.
Example: Drill used during acrylic removal.
Use: For smoothing, shaping, removing bulk.
Don’t use: On natural nails with coarse bits.
Sentence:
“At LBA, we use the e-file gently and with control.”
LBA Tip: Control, not force.
2. RPM (Revolutions Per Minute)
Meaning: Speed of the e-file.
Example: 5,000–30,000 RPM settings.
Use: Adjusting speed for different services.
Don’t use: High speed on delicate areas.
Sentence:
“Use lower RPM for natural nails to avoid heat.”
LBA Tip: Low and slow.
3. Torque
Meaning: Power behind the bit’s rotation.
Example: Strong torque prevents slowing when filing acrylic.
Use: When removing thick product.
Don’t use: Low torque for heavy removal—it stalls.
Sentence:
“High torque helps the e-file stay strong without pushing hard.”
LBA Tip: Torque = power.
4. Carbide Bit
Meaning: Metal bit for removing acrylic.
Example: Smooth-top carbide bit for bulk removal.
Use: On acrylic or hard gel.
Don’t use: On natural nails—it’s too strong.
Sentence:
“We use carbide bits only on enhancements, never natural nails.”
LBA Tip: Carbide = for product, not natural nails.
5. Diamond Bit
Meaning: Grit-covered bit for refining surface.
Example: Cuticle prep bit.
Use: Light prep and smoothing.
Don’t use: With too much pressure—it can burn.
Sentence:
“Diamond bits help us prep gently around cuticles.”
LBA Tip: Diamond = detailing.
6. Mandrel & Sanding Bands
Meaning: Mandrel holds disposable sanding bands.
Example: Coarse band for surface shaping.
Use: On enhancements.
Don’t use: Reuse sanding bands—they are single-use.
Sentence:
“Change sanding bands after each client.”
LBA Tip: Band = single-use only.
7. Grit Level
Meaning: Roughness of a file or bit.
Example: 80=coarse, 180=medium, 240=fine.
Use: Choosing correct strength.
Don’t use: Coarse grits on natural nails.
Sentence:
“Use fine grit near the natural nail to avoid damage.”
LBA Tip: Higher number = softer.
8. Heat Generation
Meaning: Heat caused by friction from filing.
Example: Client feels burning sensation.
Use: Reduce speed, pressure, or time.
Don’t use: Stay in one spot for too long.
Sentence:
“Keep the bit moving to prevent heat.”
LBA Tip: Move = no burn.
9. Back-Forward Motion (Pendulum Motion)
Meaning: Gentle sweeping movement.
Example: Moving bit side to side.
Use: Preventing heat and cutting.
Don’t use: Pressing down in one area.
Sentence:
“Back-forward motion protects natural nails.”
LBA Tip: Movement = safety.
10. Electric File Safety Bit (Safety Bit)
Meaning: Bit with a rounded top for safer use.
Example: Smooth round-top bit for cuticle area.
Use: Beginner cuticle work.
Don’t use: Aggressively—it still can cause harm.
Sentence:
“Safety bits help reduce risk for beginners.”
LBA Tip: Safety = rounded.
11. Dust Extraction / Ventilation
Meaning: Removing dust and vapor from air.
Example: Desk vacuum.
Use: Prevent inhaling dust.
Don’t use: E-file without ventilation.
Sentence:
“Good ventilation keeps the air clean.”
LBA Tip: Clean air = healthy tech.
12. Bit Shank Size
Meaning: Diameter of bit shaft (usually 3/32″).
Example: Universal salon size.
Use: Ensure bit fits e-file.
Don’t use: Wrong size—it can fly out.
Sentence:
“Make sure the bit shank matches your e-file.”
LBA Tip: Fit = safety.
13. Locking Chuck
Meaning: Mechanism holding bit securely.
Example: Twist-to-lock system.
Use: Securing bits before use.
Don’t use: Run e-file if bit is loose.
Sentence:
“Always check that the bit is locked before turning on.”
LBA Tip: Locked = safe.
14. Shank
Meaning: Part of the bit that inserts into e-file.
Example: Smooth metal rod.
Use: Identify correct fit.
Don’t use: If bent or damaged.
Sentence:
“Check the shank for damage before use.”
LBA Tip: Straight shank = safe.
15. Rings of Fire
Meaning: Circular grooves caused by incorrect filing.
Example: Painful red band on natural nail.
Use: Warning sign to adjust technique.
Don’t use: Heavy pressure near cuticle area.
Sentence:
“Rings of fire mean too much pressure was used.”
LBA Tip: Light pressure only.
16. Over-Filing
Meaning: Filing natural nails too thin.
Example: Nail becomes weak or sensitive.
Use: Identify mistakes.
Don’t use: Apply pressure or coarse bits.
Sentence:
“We avoid over-filing by using gentle, controlled motions.”
LBA Tip: Thin = danger.
17. Bit Disinfection
Meaning: Cleaning and disinfecting bits after each client.
Example: Submerging in EPA disinfectant.
Use: On reusable metal bits.
Don’t use: On sanding bands—they are disposable.
Sentence:
“All reusable bits must be fully disinfected after use.”
LBA Tip: Clean tools = safe service.
18. Forward/Reverse Switch
Meaning: Direction of bit rotation.
Example: Forward for right-handed techs.
Use: Match hand and direction.
Don’t use: Wrong direction—it can cut.
Sentence:
“Use forward mode if you’re right-handed for smoother filing.”
LBA Tip: Direction matters.
19. Pressure Control
Meaning: How hard the tech presses the bit.
Example: Light, feather-touch pressure.
Use: Avoid damage.
Don’t use: Heavy downward pressure.
Sentence:
“Let the bit do the work—never force it.”
LBA Tip: Light = right.
20. Skin Contact Safety
Meaning: Avoiding touching skin with bit.
Example: Filing near cuticle safely.
Use: Prevent injury.
Don’t use: Filing on living skin.
Sentence:
“The bit should never touch living skin.”
LBA Tip: Skin = STOP.
🧠 LBA HUMANIZED EXPLANATION: HOW TO USE AN E-FILE SAFELY
Louisville Beauty Academy teaches a 4-point safety method:
1. LOW SPEED
New techs start at low RPM for safety.
2. LIGHT PRESSURE
If you push, you will burn or cut.
Let the tool do the work.
3. CONSTANT MOTION
Never stay in one place—creates heat.
4. CORRECT BIT CHOICE
Pick the right bit for:
- prep
- removal
- smoothing
- filing
- detailing
This makes your work clean, professional, and safe.
❤️ LBA MINDSET MOMENT
Many students fear the e-file at first.
That fear is normal.
But fear becomes skill through practice.
Say this with LBA:
YES I CAN™ control this tool.
YES I CAN™ work safely.
YES I CAN™ pass my exam.
I HAVE DONE IT™ is coming next.
You are becoming a safe, confident professional.
📝 50 LICENSING-STYLE QUESTIONS — CHAPTER 5
- What tool is used for electric filing?
- What does RPM measure?
- What does torque mean?
- Which bit removes acrylic?
- Which bit is used for detailing?
- What holds sanding bands?
- What level of grit is safest for natural nails?
- What causes heat during filing?
- What motion reduces heat?
- What bit has a rounded top for safety?
- What removes dust from the air?
- What size is the standard bit shank?
- What holds the bit securely in the e-file?
- What part of the bit inserts into the machine?
- What causes rings of fire?
- What is over-filing?
- What must be disinfected after each client?
- What happens if a bit is not locked in place?
- What direction should most right-handed techs use?
- What does pressure control mean?
- What should never touch living skin?
- Why must sanding bands be replaced?
- What is the purpose of ventilation?
- Which bit should not be used on natural nails?
- What reduces friction when filing?
- When must the e-file speed be lowered?
- Why must the bit move constantly?
- What happens if you stay in one spot too long?
- What indicates poor technique near the cuticle?
- What is the safe way to prep the natural nail?
- Which bit is used only on enhancements?
- What is the correct response to client discomfort?
- Why must bits be inspected before use?
- What is the safest beginner bit?
- Why use low RPM for prep?
- What must you do before disinfecting bits?
- Why must bits be dried before storing?
- Why is correct shank size important?
- What does reverse mode do?
- What must you avoid near the nail bed?
- Why must sanding bands not be disinfected?
- What happens if torque is too low?
- Why must coarse bits be used carefully?
- What bit type is best for cuticle area?
- What is the safest pressure for beginners?
- Why should natural nails not be over-filed?
- What is the main benefit of good ventilation?
- What protects the nail from burning?
- What must be done before turning on the e-file?
- What is the LBA mindset for e-file work?
📝 ANSWER KEY — CHAPTER 5
- E-file
- Speed
- Power
- Carbide bit
- Diamond bit
- Mandrel
- High grit (240)
- Friction
- Back-forward motion
- Safety bit
- Ventilation/dust collector
- 3/32 inch
- Locking chuck
- Shank
- Too much pressure
- Filing too thin
- Metal bits
- It may fly out
- Forward
- Light pressure
- The bit
- They are single-use
- Cleaner air
- Carbide bit
- Movement
- When near natural nail
- Prevent heat
- Burning
- Rings of fire
- Soft, slow prep
- Carbide
- Stop immediately
- Safety check
- Safety bit
- Prevent damage
- Clean first
- Prevent rust
- Safety fit
- Rotates opposite direction
- Heavy pressure
- Porous, cannot disinfect
- E-file stalls
- Can cut or burn
- Safety or diamond bit
- Feather-light
- It weakens nail
- Protects breathing
- Constant motion
- Lock in bit
- YES I CAN™ use the e-file safely.
To access the full announcement and explore all 50 chapters of THE COMPLETE NAIL LICENSING MASTER BOOK, visit:
This book is LBA’s gift to the world — a fully public, free, humanized educational resource built to uplift every learner.
YES YOU CAN.
YES YOU WILL.
YES YOU HAVE DONE IT.
