Industrial Research Institute of Ishikawa

Drilling technique for carbon fiber reinforced thermoplastic (CFRTP)

Technical Classification:
[ Processing ]
[ Service ]
[ Carbon fiber reinforced thermoplastic ] [ CFRTP ] [ drilling ] [ Step drill ]

Point of the Proposed Technology

CFRTP materials shows ductile behavior in a drilling process in contrast with CFRP with thermosetting resin, and it causes a problem of large burr remaining at the drilled hole end using a conventional twist drill. In order to prevent large burr growing, we have proposed “a step drill” that distributes the cutting force for the work plate in drilling.


Improvement of the drilled hole quality of a CFRTP material (burr reduction)

New Technology

Technology Deployment and Cooperation

Development Stage Development Stage (to be completed in 2014/3; progress: 100%)
Intellectual Property Right None
Joint Researchers (their role)
Example of Application Drilling process of CFRTP molding parts
Technical Problems Evaluation of the tool life, and extension of tool life
Collaborator needed to Improve Cutting tool manufacturer
Technical WEB page


Personnel / DepartmentMachinery/Metal Department / Researcher, Kenichi Hirosaki 
Address 2-1, Kuratsuki, Kanazawa, Ishikawa Prefecture, 920-8203, Japan
Contact TEL: +81-76-267-8089

Outline of Company and Organization

Location 2-1, Kuratsuki, Kanazawa, Ishikawa Prefecture, 920-8203, Japan
Contact TEL: +81-76-267-8081
Capital / No. of Employees0 yen・
Product Line
Major Customers
Overseas Base(s)
Company/Organization WEB page

Update date: 2020/1/23