Manufacturing and Technical Data

E-File / Nail Drill Bits

Compiled from RU and BY manufacturer and trade sources, with dental bur ISO grit and numbering references included where nail-industry diamond bits use the same standards.

Main standards ISO 13485, ISO 6360, GOST references
Primary e-file fitment 2.35 mm straight shank
Coverage Materials, construction, grit, operating, sterilisation, sourcing

Summary specification

Primary fitment
2.35 mm straight shank
Core materials
Carbide, diamond, ceramic, corundum, garnet
Diamond working range
15,000-25,000 rpm
Preferred sterilisation
Dry-air
Shelf life
3 years from shipment
Quality systems seen
ISO 13485 / ISO 6360 / GOST

Material classes

Primary abrasive and tool-body materials referenced in the supplied source text.

Material What it is Primary use
Carbide TVS / tungsten-carbide hard alloy Gel, acrylic, hard gel, polygel, product removal
Diamond Technical diamond grit on metal blank Cuticle, sidewalls, natural nail prep, detail
Ceramic High-strength ceramic composition Removal, slow-speed cuticle work, allergy-safe use
Corundum Plastic-structured abrasive Skin, calluses, hard skin
Garnet Garnet abrasive Sidewalls, nail bed, correction, smoothing
Diamond + moissanite Hybrid abrasive blend Hybrid abrasive removal
Silicone / polishing Soft finishing abrasive Smoothing and finishing

Carbide bits are described as fast-running, low-heat tools that produce shavings rather than airborne dust. Diamond bits abrade rather than cut and are described as running cool at moderate speed. For retail selection, see the carbide and diamond e-file bit range.

Carbide construction

Source references: KMIZ and Freza LLC notes.

  • Working part is described as a fine-grain tungsten-carbide alloy, with premium makers using European-sourced powder.
  • The alloy is put through isostatic compaction to densify the structure and improve wear resistance at the cutting edge.
  • Working diameter up to 2.3 mm is described as single-piece carbide with no joint.
  • Working diameter above 2.3 mm is described as head-to-shank welded with a reinforced transition zone.
  • Some designs seat the shank into the head instead of butt-joining to increase the joint area.
  • Higher grades can add surface treatment or diffusion hardening for longer service life.

Carbide process chain

General manufacture sequence as described in the compiled notes.

  1. Forge the blank.
  2. Rough turning with allowance left on the blank.
  3. Rough machining against the drawing.
  4. Heat treatment by quenching and tempering, with vacuum heat treatment on premium production.
  5. Precision CNC machining of the hard alloy.
  6. EDM / electro-erosion sharpening with diamond wheels.

Carbide cut types

  • Single cut
  • Cruciform / crossed cut
  • Cruciform-transverse cut
  • Straight-transverse cut

STF series ladder

Series Meaning
Fx Super-fine cross
Mx Fine cross
Gx Medium or coarse cross
Sx Super-coarse cross
Gxi Cross-transverse
Ti Straight-transverse
GTi Straight-transverse coarse

Diamond bonding methods

Method Build Durability
Galvanic / electroplated Single grit layer electroplated onto blank Lowest durability, budget segment, around 3-4 months
Sintered / monolithic Diamond grit baked into the blank and fused into a solid tool Highest durability, roughly 2-10 years
Deposited Deposited grit layer Mid durability

Diamond coatings

  • Gold plating is described for delicate work.
  • Titanium coating gives a blue iridescent finish and higher wear resistance than gold plating.

Shank and fitment standards

Shank Use Note
2.35 mm Standard nail e-file fitment Tolerance noted as 2.35 -0.016 mm
1.6 mm Dental turbine type Tolerance noted as -0.01 mm
3.0 mm Special order Non-standard nail fitment
Code Handpiece Decode
104 / 105 Straight handpiece Type 2, 2.35 mm, conical or spherical end
204 / 205 Angle handpiece Type 1, 2.35 mm, cylindrical with groove and flat
314 / 315 / 316 Turbine Type 3, 1.6 mm, conical or spherical end

Bits should be fully seated and locked in the handpiece, with no wobble, vibration, or visible damage. Bent bits should not be used. Compatible nail drill bits and replacement options can be grouped through the shop catalog.

ISO grit, colour, and micron table

Based on ISO 6360 dental grit coding, noted in the source text as shared by nail-industry colour rings.

ISO code Colour ring Grit Avg grain size (microns) Purpose
504 Yellow Ultra-fine 27-54 Gentlest prep and finishing
514 Red Fine 40-75 Finishing after pre-grind
524 Blue / no marking Medium 76-125 Universal use
534 Green Coarse 126-177 Pre-grinding and shaping
544 Black Ultra-coarse 181-250 Heavy or bulk removal
Nail trade colour Broad meaning
White Softest abrasive, natural nail plate, sensitive skin
Yellow Very soft / fine, natural nails and sensitive skin
Red Fine universal work, skin and nail, pterygium cleanup
Blue Medium, outer skin rather than nail plate
Green Coarse
Black Extra coarse, aggressive artificial product or heel hard skin only

Coarse grit codes 534 and 544 are described as raising tool temperature and requiring low pressure and cooling. Matching coarse e-file bits and finishing drill bits can be surfaced in the shop catalog.

ISO numbering structure

Example code: 806 . 314 . 001 . 524 . 018

Group Meaning
806 Working-part material plus bond: 80 diamond, 6 galvanic bond
314 Shank type and head length
001 Working-part shape, spherical / ball
524 Grit code
018 Nominal working-part diameter, 1.8 mm

Shapes and uses

Shape Main use
Flame Cuticle prep and sidewall access
Ball Finishing around the cuticle after prep
Cone / rounded cone Controlled detail work in small areas
Barrel / cylinder Wider contact, surface work or product reduction
Parabola / corn Aggressive product removal
Disc Pedicure use at lower rpm
Polishing Smoothing and finishing rather than cutting

Common retail groupings such as flame bits, ball bits, cone bits, and barrel bits can all route to the shop section.

Operating parameters

  • Diamond bits typically work around 15,000-25,000 rpm.
  • Low-power devices are described as working well with diamond up to about 20,000 rpm.
  • Larger diameters should run at lower rpm.
  • Diamond bits stay cool at moderate speed and are suited to cuticle and sidewall work, but coarse grit carries higher injury risk on the natural nail.
  • Worn bits force higher pressure and speed, increasing heat and damage risk.

Cleaning and pre-sterilisation

  • Sequence: disinfect, pre-sterilisation clean, then sterilise.
  • Use anti-corrosion disinfectants approved for medical tools.
  • After disinfection, rinse residue away under running water using cleaning brushes.
  • Ultrasonic washing is permitted without heat and without rotation.
  • Rinse 4-6 minutes under clean running water until disinfectant is gone.
  • Dry at 85 C or at room temperature, then inspect visually.
  • Bits marked N should be cleaned separately from bits without N.

Sterilisation

Method Parameters Note
Dry-air 160 C for 150 min or 180 C for 60 min Preferred method
Steam autoclave 0.21 MPa at 132 C (+/-2 C), hold 5-7 min Permitted

Transport and storage

Topic Data
Transport -60 C to +50 C, up to 100% humidity at 25 C
Storage -50 C to +40 C, up to 98% humidity at 25 C
Shelf life 3 years from date of shipment
Handling Store clean dry bits in a closed bit box to protect the working surface

Quality and regulatory standards seen

  • ISO 13485:2016 quality management system
  • ISO 6360 bur numbering and grit coding
  • ISO 534 / 544 coarse diamond grit references
  • GOST dimensional standards cited alongside ISO

Contract manufacturing scope

Relevant for own-brand or white-label sourcing.

  • TVS carbide bits
  • Diamond bits with moissanite
  • Natural-cellulose polishing sponges
  • Pedicure caps
  • Replaceable files and sanding bands
  • Disc bases / mandrel discs

For direct retail browsing instead of manufacturing scope, use the E-File Bits homepage or go straight to the e-file bits shop.