V Slot Mill

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  1. V Slot Milling
  2. V Slot Million Dollar
  3. Slot Drill Vs End Mill
  4. V Slot Mill Shop
  5. V Slot Extruded Aluminum

End mills, slot drills, routers, milling cutters, drill bits, V-bits and burrs - what does it all mean?
And which bit do I need for what job? For instance, which are the best end mills? and which is the best end mill for aluminium, and which are the best end mills for stainless steel.
This article gives you the low down on milling cutters and CNC tooling.

Mill slots in machine tool tables, indexing tables, and other workholding surfaces. Engraving End Mills A fine -point tip cuts lettering, designs, and logos in a variety of metals and composites, such as aluminum, fiberglass, and titanium. A simple approach to milling a square or rectangular pocket on the vertical milling machine.Check out MetalworkingFun.com for more similar instructional vide. If you are required to machine a 60, 90 or 120 degree channel on a surface, we have a line of V slot cutters to support this application. These tools can machine in all three directions. The tools are suited for aluminum, brass, plastics, exotic composites and any soft metals. They are not recommended for steel.


Milling cutters, or endmills, are used in a CNC machine: Computerised Numeral Controlled.

Specialised software is used to send automated milling instructions or a ‘toolpath’ to the machine which then cuts away a design in your stock material.

The craft market has recently exploded with exciting compact, table top CNC Routers and Mini-milling machines. CNC Routers are now affordable enough to allow DIY enthusiasts access to this high- precision milling tool for carving and engraving.


Endmills, routers and milling cutters are those used in a CNC machine, but if you don’t have a CNC machine then you can use Burrs in a rotary tool.

Burrs are available in carbide, steel and diamond.


Just about any material can be cut using a CNC machine. Popular materials are metals, plastics and wood.

So why use an Endmill and not a drill bit? In short, a drill bit moves up and down, an end mill moves side-to-side (Note: there are endmills available that move in all directions).


1. End Mills cut rotationally in a horizontal, or lateral (side to side) direction whereas a drill bit only cuts straight down, vertically into the material.

2. Endmills are available in a wide variety of lengths, diameters, flutes and types, and are chosen according to the material they are cutting and the surface finish required for the project.

3. End mills are the cutters of the milling world and are used for slotting, profiling, contouring, counter-boring, and reaming.

4. End mills allow for precision parts to be cut, anything from machine parts, jewellery designs, wood engravings, sign making, plastic cutting, mold making and circuit boards.


V Slot Milling

V Slot Mill

1. Drill Bits cut round holes straight down into the material by rotating them in a rotary drill.

2. Most drill bits have a spiral groove (flutes) which give the drill bits a twisted appearance and helps to cut away material as they move up and down in the hole.

3. HSS (High Speed Steel) and carbide drill bits are fluted. (twist drills)

4. The exception to this rule are diamond drill bits which have a flat end rather than pointed or fluted. (Unless it is a diamond twist drill which is not used for drilling but for expanding already existing holes such as in beads)


The Spiral-shaped cutting edges on the side of the end mill are called flutes.

Flutes provide an empty path for the cutting chips to escape from when the end mill is rotating in a workpiece.

End Mills have either 2, 3 or 4 flutes per bit. 2 and 4 flutes are the most popular.

  • For use on wood and aluminium
  • Fewer flutes are best for chip evacuation, keeping the bit cooler, but leaving a rougher surface cut.
  • 2 flutes are best for use on Wood and aluminium as these produce very large chips in comparison to other materials.
  • 2 flute end mills are also referred to as slot drills.
  • For use on most other materials
  • 4 flutes are used on most other materials, can cut harder materials than 2 flutes and will create an overall smoother surface finish.

There are multiple types of End mills, each designed with a variety of different factors to enable you to choose the right end mill to match the material you’re working on, and the type of project you’re going to use it for.

Fish tail points prevent any splintering or breakout and will plunge directly into your material producing a flat surface.

These Router End Mills are ideal for plunge routing and producing precise contours – making them ideal for sign making and metal forming.

For an excellent finish, choose a diamond up-cut as these have an abundance of cutting edges.


V-bits produce a “V” shaped pass and are used for engraving, particularly for making signs.

They come in a range of angles and tip diameter’s. The small angles and tips provided on these V-shaped engraving bits produce narrow cuts and small, delicate engraving of lettering and lines.


Ball nose mills have a radius at the bottom which makes for a nicer surface finish in your workpiece, meaning less work for you as the piece won’t need to be finished any further.

They are used for contour milling, shallow slotting, pocketing and contouring applications.

Ball nose mills are ideal for 3D contouring because they are less prone to chipping and leave a nice rounded edge.

Tip: Use a Roughing end mill first to remove large areas of material then proceed with a ball nose end mill.


Great for large surface area work, roughing end mills have numerous serrations (teeth) in the flutes to quickly remove large amounts of material, leaving a rough finish.

They are sometimes referred to as Corn Cob cutters, or Hog Mills - so called after the pig who ‘grinds’ away, or consumes, anything in it’s path.

Commonly referred to as Flat End Mills, square end mills produce a sharp edge at the bottom of the slots and pockets of the workpiece.

They are used for general milling applications including slotting, profiling and plunge cutting.

Milling


Similar to square end mills/flat end mills but these have a round cutting edge also known as bull nose (not to be confused with Ball nose as mentioned above).

They are less prone to chipping and generally have a longer tool life.


Most end mills are manufactured from either cobalt steel alloys – referred to as HSS (High Speed Steel), or from tungsten carbide.

The choice of material of your selected end mill will depend on the hardness of your workpiece and the maximum spindle speed of your machine.


HSS end mills come at a cheaper price, but do not offer the tool life or speed capacity of solid carbide end mills.


Cobalt end mills come at a higher price than HSS but provide better wear resistance and toughness.


Solid Carbide end mills are considerably harder, rigid, and more wear-resistant than others.

Carbide end mills are extremely heat-resistant and used for high-speed applications on some of the hardest materials such as cast iron, non-ferrous metals, alloys and plastics.


Endmills with added chemical coatings are also popular today.

Often more expensive, these coatings are added to the bit to reduce wear and friction. However, not all coatings are suitable for all materials and whilst a particular coating may be good for productivity on one material, it may be not be on another.

Popular coatings are Aluminum Titanium Nitride (AlTiN) and Titanium Diboride (TiB2)


  • Centre-cutting end mills are those that can be plunged straight down into the material. They can mill, and they can drill. (They have cutting edges on the end face and the sides) These are usually the 2 flutes or 3 flute endmills, and occasionally you can find some 4 flutes that are centre cutting as well.
  • Non-centre cutting end mills refers to those that mill, they do not drill. (they have cutting edges only on the sides)
  • Up-cut end mills eject chips towards the top of the workpiece, leaving a cleanly cut bottom surface inside your material.
  • Down-cut end mills do the opposite, they leave a smooth top surface on your material.
  • Compression end mills combine the best of both worlds and produce a smooth surface on both ends of the workpiece when cutting.


So what type of end mills do you require for general milling applications?

  • For hardwoods, plywood and aluminium: High quality 2-flute (slot drills) up-cut and down-cut end mills.
  • For 3D contours and profiling: 2-flute ball nose end mills
  • For sign-making and routing of plastics, acrylics and metals: Carbide Router end mills. and carbide engraving v-bits


  • Selecting the right tooling for your material and project will improve the quality of your work and reduce the need for excessive hand-finishing.
  • The feed rate of the material must be matched to the optimal speed of the end mill.
  • A 50% reduction in operating speed can double the life span of your end mill.
  • Choose the correct flute count for the application - proper chip evacuation is crucial as heated cutters can lead to low-quality cutting (burnt material, burred edging and dull tooling).
  • Use carbide end mills for harder materials and high production applications.
  • Sometimes extra length end mills are necessary to use, but to combat deflection (bending of the bit) operate at the proper speed and feed rates and always use the most rigid (shortest and widest) end mill available for the application.
  • Use coolant or compressed air to prevent chip build-up.
  • Use the whole side of the cutting edges rather than a small portion towards the tip. This will improve the shelf life of your endmill as the heat and work is distributed over a larger surface area.


RPM (Revoltions Per Minute) = 3.82 x SFM (Surface Feet per Minute) ÷ endmill diameter

SFM = endmill diameter x RPM ÷ 3.82

IPM (Inches Per Minute) = RPM x number of flutes x Chip Load

Chip Load = IPM ÷ RPM x number of flutes.


Horn Circular Technology

Horn Circular Technology (HCT) software generates estimated cutting data that is specific to HORN tooling based on supplied parameters. Review your input carefully before applying the suggested feeds and speeds.

Please contact the Horn USA Technical department should you require assistance or need to verify your data.

>>Proceed to HCT and click on 'Guest Access' in the lower left corner.

Whirling System Selection Tool

Find the correct Whirling tools for your machine and whirling unit.

Groove Milling by Circular Interpolation

Systems: M306 / M308 / M311 / M116 / M313 / M328 / M332 / M335

Tool system with 3 and 6 effective teeth for:

  • Groove Milling
  • Full Radius Milling
  • Chamfering
  • Bore Milling
  • Thread Milling
  • Face milling

From bore diameter 4.3 mm
Milling cutters up to cutting width 10 mm

System: M306-M335 (Metric)

System: M306-M335 (Inch)

Technical Data Movie

Systems: M275 / 380 / 381

Cutter heads and side milling cutters with indexable inserts Type 314 bolted on one side

  • Milling from bore diameter 45 mm

System: M275 (Metric)

System: 380-381 (Metric)

System: M275-381 (Inch)

Technical Data Movie

Systems: M101 / M310 / M382 / M383

Milling tool for

  • Groove milling
  • Slot cutting

With indexable inserts

System: M101 (Metric)

System: M310-M383 (Metric)

System: M101-M383 (Inch)

Technical Data Movie

Systems: M275 / M306 / M308 / M311 / M313 / SM328 / M332 / 380

Milling tools for producing

  • Metric ISO threads
  • Whitworth pipe threads

System: M275-380 (Metric)

System: M275-380 (Inch)

Technical Data Movie

Sytems: M313 / M274

Milling tools for producing gears

  • Up to: Module 6
  • Basic Profile 1 according to DIN 3972 for Finishing

Chamfer Milling

Sytems: M306 / M308 / M311 / M313 / SM328 / 380

Milling tools for chamferting

  • Top and bottom of bores
  • 3 and 6 flute tools available

Face Milling

Systems: M306 / M308 / M311 / M313 / SM328 / 380

Milling tools for face milling

  • ER and straight shank holders specific for swiss machines and small lathes

T-Slot Milling

Systems: M311 / M313 / M328

Milling tool making T-slots for slot

  • Widths 17 mm, 20 mm and 24 mm

System: M311-M328 (Metric)

System: M311-M328 (Inch)

Technical Data Movie

Systems: M275 / 381

Tool system for making 2, 3, 4, 5 or 6 edge faces on turned parts

  • Solutions for various lathes with driven tooling

System: M275-381 (Metric)

System: M275-381 (Inch)

Technical Data Movie

Systems: M302 / 389

Tool system for making special threads on lathes

  • Standard and special solutions for the whirling heads realised for all common interfaces

System: M302-389 (Metric)

System: M302-389 (Inch)

V Slot Million Dollar

Technical Data Movie

System: DC

Solid carbide milling cutter for Milling by Circular Interpolation

  • Groove Milling
  • Thread Milling - Partial Profile
  • Thread Milling - Full Profile
  • Chamfer Milling

Slot Drill Vs End Mill

Cutting edge diameter from 0.7 mm

System: DC (Metric)

Slot

System: DC (Inch)

Technical Data

V Slot Mill Shop

Systems: DP / DS

Solid carbide milling cutter for

  • Steel (soft and hard),
  • Copper,
  • Graphite,
  • Aluminum

Cutting edge diameter from 0.2 mm
Full radius, torus, micro, end, roughing and double radius mills

System: DP-DS (Metric)

System: DP-DS (Inch)

Technical Data Movie

System: DG

Milling system with replaceable carbide cutting heads for

  • Center Cutting
  • Groove Milling
  • Chamfering
  • Copy Milling
  • High Feed Milling

Milling with Indexable Inserts

Systems: DA / DAH

Shank and industry standard threaded connection milling cutter for

  • Face milling,
  • Plunge milling,
  • Corner milling,
  • Chamfering,
  • Angled grooving

Positive inserts geometry for easy cut

System: DA (Metric)

System: DA (Inch)

System: DAH (Metric)

Technical Data Movie

URMA Modular System

  • Axial end facing with URMA IntraMax
  • Finish boring with URMA fine drill head

V Slot Extruded Aluminum

System: URMA (Metric)

System: URMA (Inch)

Technical Data