Acrylic milling cutters from the manufacturer ✔ Over 30 years of experience ✔ Certified ✔ Quality made in Germany ✔

We specialize in the development and production of high-quality, precise tools used in various industries. By using the latest technologies and materials of the highest quality, we ensure exceptional performance and durability of our products.

Are you looking for high-quality acrylic milling cutters that impress with long tool life and flawless surfaces? Then you have come to the right place. Here you will find a large selection of single-edged spiral fluted solid carbide end mills with polished grinding.

long-term experience in acrylic and plastic processing
long-term and cooperative partnership
tools optimized for your needs

Just send us a request and we will get back to you.

Experience

since 1991

Employees

more than 110

Made in Germany

100%

Certification

according to DIN EN ISO 9001

Advantages of our acrylic cutters

Great toughness, edge strength and temperature resistance thanks to tungsten carbide
polish-ground cutting edges and chip spaces -> particularly smooth surfaces
suitable for machines with 30.000 -60.000 revolutions
cutting speeds of VC 300 - 500 meters
combination of optimum surface finish with maximum speeds and maximum feed rates
no finishing necessary -> time saving
special sizes available at short notice

We are here for you

If you have any questions about these or other topics, our friendly staff will be happy to help you at any time.
Benefit from the many advantages offered by Lehmann Präzisionswerkzeuge GmbH.

Just send us a request and we will get back to you.

Acrylic milling cutter the most important points for selection

The number of cutting edges

Acrylic milling cutters are available with different numbers of cutting edges. Basically, a distinction is made here between single- and multi-bladed versions. We have briefly summarized the advantages of both systems here.

Advantages of multi-bladed acrylic cutters

The cutting edge is a wearing part. The more cutting edges the acrylic milling cutter has, the more cutting edges share the wear - the service life of the milling head increases.
Acrylic milling cutters with multiple cutting edges run rounder than versions with one cutting edge.
Due to the larger cross-section, more heat is dissipated toward the holder/spindle than with a single cutter - better cooling.
The more cutting edges, the smaller the individual chips and the smoother the surface.

Advantage acrylic cutter with few cutting edges

The acrylic milling cutter dips into the material more easily.
The chip flute is larger and therefore the proportion of open area is larger
Less risk of clogging
Chips can be better removed to the outside.

Which variant is the better one depends on the material to be machined. In general, however, it is better to use cutters with one cutting edge for softer materials such as acrylic glass. Here, erosion is a secondary problem. It is more important to avoid clogging as far as possible.

Acrylic cutter the shape of the cutting edge

The cutting edge can be divided into two main shapes. Here there are versions with a stocky blunt and with a rather pointed sharp shape.

Strangled edge

relatively blunt
solid cutting edge body
low fine grinding
chip tends to upsetting
well suited for solid materials

Stubbed cutting edges are usually designed with a face grinding. The face is flat and level. The advantage of this form is the stability and the smooth surface of the bottom when pocket milling. The disadvantage, however, is the poorer plunging and cutting result for materials with low strength.

Tip cutting edge

rather sharp
filigree cutting edge body
large free grinding -> chips can flow off more easily
especially suitable for materials of low strength such as plastics

In contrast to stocky cutting edges, the pointed versions are usually provided with a fishtail grinding. It is characterized by its v-shaped steep course. The advantage of this design is the easier plunging and smoother edges on wood, plastics and metals with low strength. However, the tool life is lower here. Also, the bottom has a poorer surface. Typically, circular structures are created.

When it comes to working with plastics such as acrylics,
it is best to use pointed cutting edges with steep grinding and large flutes.

Twist of the acrylic burrs

Another aspect that plays a role in the selection is the twist. Here, a distinction is made between versions with right-hand and left-hand twist. The main question here is how deep the milling has to be.

Right twist

"upcut", normal shape
Conveying the chips upwards
Acrylic cutter lifts base material upwards, corkscrew effect

Left twist

"downcut" (special form)
Conveying of chips downwards or backwards towards the exposed groove
Acrylic milling cutter presses base material against table, inverted corkscrew effect
Not suitable for larger milling depths

Other factors to consider in the selection process include

In addition, there are numerous other factors that must be considered when selecting and using milling cutters. We have briefly summarized some of them for you here.

Coating
Toothing
Cutting edge length
Clearance
Diameter
Cutter substrate
Shank shape

If you have any questions about these and other topics, our friendly staff will be happy to assist you at any time. Simply send us an inquiry and benefit from the numerous advantages of Lehmann precision tools.

The most important information about acrylic milling

What you need to know about acrylic

Acrylic glass is a glass-like plastic from the group of thermoplastics. Its correct technical term is polymethyl methacrylate (PMMA for short). Due to many advantageous properties, acrylic is versatile. The most important are:

Break resistance and stability
Brilliant optical effect due to polished edges
Light transmission
UV stability
Frost and heat resistance
Suitable for years of outdoor use.
Easy to clean: fingerprints and even scratches can be easily removed
Considerably cheaper than glass

The most important areas of application for acrylic glass:

Window construction
Facade construction
Production of advertising spaces
Company signs
Room dividers
Shower partitions
Acrylic furniture
Picture frames
Eyeglass lenses
Jewelry making

Requirements for acrylic milling

Acrylic glass is a material that can be processed in many ways. In addition to milling, laser cutting, drilling, jig sawing, table sawing and hand circular sawing are also possible. Acrylics can also be cut by hand. To do this, they are usually first scored and then cut through.

The most important aspect of cutting acrylic is cooling. If the acrylic cutter gets too hot, the material can melt and cause the cutter head to stick. Therefore, cooling should be used. Minimum quantity lubrication with soapy water is often recommended. Another option is to use compressed air. This variant offers the advantage that the chip spaces are blown free, which prevents clogging. In connection with heat generation, the speed of rotation should also be taken into account. For acrylics, it should be as low as possible. The feed on the other hand should be set higher so that the chip flow is optimal.

Basically, the point is that productivity is increased with the cutting speed. At the same time, the wear of the cutting edges also increases with the cutting speed. It is therefore important to find the optimum balance between cutting speed and wear. The right cutting data play a major role here. Feed rate, rotational speed, speed and infeed must be matched to the material of the workpiece. The next section explains exactly what needs to be taken into account.

The edges are also particularly important when processing acrylic glass. In mechanical processes, they must be repolished in a separate work step in order to develop their full smoothness and brilliance. The more precise the milling process, the less reworking is required afterwards.

Practical tips for working with the acrylic milling cutter

Select the right tool:

Always select the acrylic milling cutter to match the material.
Use an acrylic milling cutter that is as short as possible and clamp it as far in as possible.
For plastics, it is best to use milling cutters with polished flutes. This prevents the chips from sticking.

The correct operating parameters:

Follow the recommended values when milling acrylics. During the milling process, you can further adjust the parameters to optimize the process.
Basically rather lower speed, feed quietly higher for good chip flow.
The more feed during roughing and the lower speed at the milling motor, the less heat is generated by friction
For finishing, the speed can be higher and the feed rate lower, as less heat is generated.
It is best to mill internal contours clockwise and external contours counterclockwise. This way the chips are always on the bad side.
You should not mill deeper than 2 - 3 cutting edge diameters. Deeper grooves are best milled in several passes.
Increase stock removal rate and economy by milling multiple passes at shallower depths and higher feed rates, rather than milling a deep groove more slowly in one pass.

Cooling and lubrication:

The milling tool should be cooled at all times, either by lubricating emulsion or by compressed air. Compressed air has the advantage of removing chips. This keeps milling edges clear and eliminates the need for polishing.
Lubrication improves surface quality and increases tool life. For acrylics, a lubrication of soap suds is usually used.
If cooling is not possible, the speed should be selected according to the recommended specifications, but the feed rate should not be too small.