Center drills Form A

Center drills type A with 60-degree tip angle

Our Type A center drills feature a tip angle of 60 degrees and comply with DIN 333. This tool allows you to create holes that meet the specifications defined in DIN 332 (for holes made with centering tools). The typical application area for Type A center drills is in industry and craftsmanship, serving to create center holes in workpieces made from various materials that are processed on turning and grinding machines. In standard versions, Nachreiner offers Type A center drills made from HSS (high-speed steel). For special applications (such as working with specially alloyed and non-alloyed steels, various other metals, and different plastics), we also provide the HSSE version as an extra-long Type A center drill with a 60-degree tip angle. If you require different angles or material specifications, please contact us directly. We almost always find a suitable solution at a fair price to meet your requirements.

Preventing wandering with type A center drills

Center holes reduce or prevent the occurrence of wandering during the drilling process in workpieces. Such wandering of metal drills not only increases production waste but also leads to greater wear on the drill itself. Furthermore, a lack of precision is not an option for many applications. Therefore, we recommend using our Type A center drills when high precision in your workpiece holes is essential. Additionally, center holes are suitable for setting up workpieces to turn between centers or to support particularly long workpieces using live centers. Both the standard and the extra-long versions of Type A center drills are not suitable for creating deeper holes, as they lack guide chamfers. They serve only for pre-drilling, while the actual deep drilling is then completed with a twist drill or another suitable metal drill.

Application of type A center drills

Typically, center drills are used in guided machines to process workpieces. After proper clamping, the centering tip ensures that the hole is accurately placed at the intended point. After the centering tip, the cutting edges transition conically at a 60-degree angle into the shaft of the drill. Depending on the design, the length of the centering tip may equal the diameter of the drill or slightly exceed it. The short design allows center drills to operate without significant lateral forces. If you are unsure which variant you need, our expert staff is happy to assist you directly. We provide personalized advice and can find viable ways to realize specific solutions for you.