CFRP Drill

Contact Details

LMT Onsrud LP
1081 S. Northpoint Blvd.
United States
Toll Free Phone

42.3401787, -87.8882648

December 01,2014

LMT Onsrud LP offers a drill for CFRP (Carbon Fiber-Reinforced Plastic) to prevent fraying and delamination. Drilling in CFRP can be difficult because three major considerations have to be addressed to successfully produce a clean cut: (1) hole quality, (2) hole diameter, and (3) drill life. To address these issues LMT Onsrud has developed the CFRP Drill with a "W" point, which features a specially engineered geometry and a diamond-like carbon (DLC) coating.

To ensure hole quality and diameter, the "W" point of the drill centers the drill to let the peripheral cutting edges shear the material producing a clean, tight tolerance hole without fraying, splintering or delamination. Tight tolerances are held on drill diameters to ensure assure that holes are drilled to precision sizes. Designed specifically for CFRP applications, the new drill features a special 82 center point angle with a 50 peripheral outer tip angle engineered and optimized to provide quality drilled holes every time.

Like other cutters commonly used in composite applications, the drill incorporates diamond to extend tool life, a particularly important consideration when machining a tough material like CFRP. In this case, the carbide grade drills are coated with a DLC coating using a PVD process to extend tool life. The advantage is that the drill achieves a very smooth surface and exhibits a low coefficient of friction that further reduces drilling forces. The coating also contributes to the drills performance by adding lubricity and wear resistance while reducing built-up edges and improving chip flow.

These drills perform best in thinner materials because the specially designed point geometry shears fibers efficiently without excessive pressures that can cause "blow-out" with other drills. The key is to prevent the delamination from starting and hence eliminate the lateral forces on the fibers.

Related Glossary Terms

  • centers


    Cone-shaped pins that support a workpiece by one or two ends during machining. The centers fit into holes drilled in the workpiece ends. Centers that turn with the workpiece are called “live” centers; those that do not are called “dead” centers.

  • lubricity


    Measure of the relative efficiency with which a cutting fluid or lubricant reduces friction between surfaces.

  • physical vapor deposition ( PVD)

    physical vapor deposition ( PVD)

    Tool-coating process performed at low temperature (500° C), compared to chemical vapor deposition (1,000° C). Employs electric field to generate necessary heat for depositing coating on a tool’s surface. See CVD, chemical vapor deposition.

  • point angle

    point angle

    Included angle at the point of a twist drill or similar tool; for general-purpose tools, the point angle is typically 118°.

  • tolerance


    Minimum and maximum amount a workpiece dimension is allowed to vary from a set standard and still be acceptable.

  • wear resistance

    wear resistance

    Ability of the tool to withstand stresses that cause it to wear during cutting; an attribute linked to alloy composition, base material, thermal conditions, type of tooling and operation and other variables.

Additional Products from LMT Onsrud LP

LMT Onsrud LP is launching a new endmill series designed to meet the toughest challenges of machining Inconel and other nickel-based materials. The new MXR series has been engineered for heavy profiling allowing for 15 percent radial engagement during machining.
LMT Onsrud LP is launching a new endmill series designed to meet the toughest challenges of machining Inconel and other nickel-based materials. Configured in 7-, 9- or 11-flute options, the HXR series endmill line delivers fast material-removal rates and has been developed for low radial and higher Read More
As a leader in compression spiral tooling, LMT Onsrud has expanded its product offering on two of its most popular compression tooling lines: the Polaris and Marathon Compressions.
LMT Onsrud is offering its innovative compression tooling technology within its new line of high-speed steel dor-bits.
LMT Onsrud has expanded its line of AR endmills designed to provide exceptional performance and tool life within aluminum and nonferrous roughing applications.
LMT Onsrud LP launched and significantly expanded its offerings in seven key product series. Included in the expansion are key introductions in DFC routers, solid-carbide endmills and PCD engravers.
LMT Onsrud LP introduces the latest addition to its comprehensive line of chip control technology with the Progressive Chipbreaker (67-220 series) tooling for composite materials.
LMT Onsrud LP offers a three flute and four flute cutting tool (54-200 series) specifically designed to easily machine some of the most challenging and abrasive characteristics inherent to glass-reinforced plastic (GRP).
LMT Onsrud LP introduces a new series to its high-performance endmill offering; endmills for steel and cast iron.
LMT Onsrud LP introduces a new cutting tool to machine composite materials.