Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/92765
Title: Performance evaluation of endrills
Authors: Rahman, M. 
Seah, K.H.W. 
Venkatesh, V.C.
Issue Date: 1988
Source: Rahman, M.,Seah, K.H.W.,Venkatesh, V.C. (1988). Performance evaluation of endrills. International Journal of Machine Tool Design and Research 28 (4) : 341-349. ScholarBank@NUS Repository.
Abstract: This paper evaluates the performance of a relatively new type of drill called an endrill which is a cross between a drill and an endmill. Investigations into the effects of its cutting conditions on the drilling forces, surface finish, drill wear and hole oversize were carried out. It was found that endrills produced better quality holes than conventional twist drills, better surface finish and less oversize of the holes. Hence, with proper feed, speed and flow rate of the pressurized flushing coolant, a good finish of about Ra = 1 μm can be attained without reaming. Thus, the productivity of finished holes can be remarkably improved. Compared to twist drills, lower torque and thrust were observed which yielded improved tool life and reduced power consumption. No "walking phenomenon" was observed when this kind of drill was used and the amount of hole oversize was found to average about 0.7% of the drill diameter as compared to 1.6% when twist drills were used. Finally, general equations for the drill torque and thrust were derived from the experimental results. © 1988.
Source Title: International Journal of Machine Tool Design and Research
URI: http://scholarbank.nus.edu.sg/handle/10635/92765
ISSN: 00207357
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

Page view(s)

43
checked on Feb 17, 2018

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.