NC center drills 142°

For specialized applications: Solid carbide (VHM) NC spot drill with 142-degree tip angle

Most applications in metalworking can be handled with NC spot drills that have standard tip angles of 90, 120, or 142 degrees. The tip angle plays a crucial role in the stability and lateral guidance of the twist drill that follows the pilot hole. Therefore, it’s essential to know which tip angle best suits your needs. At Nachreiner Tools, you will find our high-quality VHM NC spot drills with a 142° tip angle, along with other common variants. In addition to different angles and sizes of NC spot drills, you can also choose from:

• HSS
• HSSE
• VHM (solid carbide)

The 142° VHM NC spot drills offer advantages over the HSS and HSSE versions because they are not just equipped with a brazed carbide tip; the entire drill body is made from a single piece of solid carbide. This gives the 142° VHM NC spot drills excellent durability and makes them highly resistant to wear, even under high loads. Additionally, VHM drills generally achieve significantly higher cutting speeds, which considerably reduces processing times for workpieces made of high-strength metals. This benefit applies to our VHM NC spot drills with a 142° angle and other tip angles as well.

Pre-Drilling with VHM NC spot drills enhances precision on the workpiece

Skipping pre-drilling with NC spot drills often leads to increased scrap rates or other quality issues in mass production. This is primarily because metal drills tend to wander when creating holes in especially hard materials. Even CNC and NC machines, despite their precision, experience issues with drill wandering due to insufficient lateral guidance at the beginning of the drilling process. Misaligned holes, frayed edges, or scratched surfaces are additional problems that negatively impact quality control. Wandering, especially with longer twist drills, can be effectively prevented by creating a pilot hole that aids in centering the tool. While center drills are suitable for this task in many cases, NC spot drills have proven particularly effective when used with NC and CNC machines. The purpose of VHM NC spot drills is the same as that of a center drill, but NC spot drills do not require a centering tip, which benefits tool longevity and machining speed. This is made possible by the high geometric stiffness and stability of most CNC or NC machines.

Nachreiner's recommendation: Invest in sets of VHM NC spot drills

To ensure you always have the right size and type of VHM NC spot drill on hand, we recommend purchasing a complete set of spot drills. At Nachreiner Tools, most metal drills, taps, and cutting tools are available individually and in cost-effective sets. You should also keep replacements available in case a tool wears out during operation. Did you know that Nachreiner can restore worn or dull 142° VHM NC spot drills, as well as almost any other metal drill, to near-new condition through professional regrinding? We offer this affordable refurbishment service to our customers for Nachreiner tools as well as for other brands. If you have questions, requests, or specific requirements, please don’t hesitate to contact us at any time. We can provide quotes for special coatings, custom tool designs, and individual solutions beyond the standard selection.