Project Title

Snug Fit Crescent Wrench


College of Engineering (COE)

Date of Last Revision

2020-05-05 10:40:29


Mechanical Engineering

Honors Course

Honors Project in Mechanical Engineering 001

Number of Credits


Degree Name

Bachelor of Science

Date of Expected Graduation

Spring 2020


The most commonly used brand of adjustable wrench, a Crescent Wrench, dates back to the early nineteen hundreds. The tolerances associated with the adjustable wheel used by the most common adjustable wrench designs allow the position of the lower jaw to vary while using the tool. These undesired fluctuations in the position of the lower jaw make it difficult to adjust the wrench to the desired position and keep it in position once the desired position is set.

The proposed adjustable wrench design addresses the tolerance issues by constraining the lower jaw with a new mechanism. The mechanism makes minor sacrifices in simplicity to attain advantages in practicality. (Content removed due to patent of design.) In addition to the competitive advantages offered by the proposed adjustable wrench design, the ANSI standard strength rating for existing adjustable wrenches is maintained. The proposed adjustable wrench will likely cost more than standard adjustable wrenches, but the design upgrades appear to greatly outweigh the minor price increase. These design improvements benefit every kind of user, from a handyman to a mechanic. For these reasons, it is apparent that the proposed design successfully improves upon the design of a standard adjustable wrench.

Research Sponsor

Dr. Scott Sawyer

First Reader

Dr. Gopal Nadkarni

Second Reader

Dr. Yogesh Singh

Honors Faculty Advisor

Dr. Scott Sawyer


Content has been removed from abstract and report due to patent concerns.

WHC-HRP+Final+Signature+Page.doc (49 kB)
Signature Sheet

Included in

Manufacturing Commons



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