News & Knowledge

Welcome to our central News & Knowledge page! Here you will find details about the latest happenings here at Ever Sharp Tools, in addition to articles, case studies and much more. Be sure to check back frequently, as we are always adding something new!


Ever Sharp Tools is excited to be exhibiting at the 2024 International Manufacturing & Technology Show (IMTS 2024). The show will take place at McCormick Place in Chicago, IL from September 9 – 14, 2024. EST will be located in the North Building, Level 3 – be sure to visit us in Booth 237120.

For more information about our booth location or to request guest passes to attend IMTS, please e-mail our Sales Team at

What are the most common types of Spline Gages?

There are 3 main categories of spline gages (also spelled “gauges”) to check splined components:

Functional Gages are commonly called Go and No Go gages. They include Plug – used to check internal splines – and Ring – used to check external splines. These can be manufactured for involute, serration, straight, parallel, angular, tapered, spur and helical splines. Go/No Go gages provide the most basic inspection of spline component tooth profiles via a “pass/fail” check method. Gages can be made to multiple standards including ANSI/AGMA, DIN, JIS, SAE and more!

Variable Gages can be used to check the same tooth profiles as that of standard functional gages, except that these specialty gages measure exact space or tooth dimensions by comparison to a setting master, using a precision indicator. These gages are generally made of multiple “sections” which allows for greater accuracy of the product. The end sections are generally fixed, while the center section adjusts to measure size variation and transfers that motion to the indicator. Variable gages can also be used to check dimension over pins (also called dimension under pins, dimension over balls or dimension between balls). These gages feature 2 spring-loaded balls whose motion is transferred to an indicator. Variable gages can made in either handheld or stationary (bench gage) styles, depending on the size of the item being checked.

Other Specialty Gages Other specialty gages include taper master plugs, locking spline arbors, locking spline rings, concentricity gages, tapered spline arbors, expanding arbors, plain round arbors, plain rings and more.


Ever Sharp Tools is a global leader in custom gage manufacturing. Click Here to learn more about our custom gage products or CONTACT US for assistance with your spline inspection needs and a free quote today!

The broach tool design diagram below shows the general geometry of a hole broach. Note that “P” represents the pitch, “nr” is the number of roughing teeth, “ns” is the number of semi-finishing teeth, and “nf” is the number of finishing teeth.

The broach tool design includes three sections: roughing, semi-finishing and finishing. The broach combines three levels of cutting with one tool. Unlike typical machining processes, broaching completes multiple machining steps in quick succession. This makes broaching an efficient and popular option, especially for higher volume production machining.

Broach tools can machine a variety of hard and soft materials, depending on the design and tool type. The broaching process is similar to reaming, shaping, milling and boring, and is considered a superior option for high-volume production applications.

A high quality broach tool is critical to successful broaching results. EST makes broach tools of the highest quality and precision, so contact EST today for your broach tool quote.

Diagram from Degarmo, E. Paul; Black, J T.; Kohser, Ronald A. (2003), Materials and Processes in Manufacturing (9th ed.), p. 637. For additional information and source references, see

What is Broaching?

Broaching is a machining process that uses a toothed tool, called a broach, to remove material from a workpiece. There are two main types of broaching: linear and rotary. In linear broaching, which is the more common process, the broach is run directly against a surface of the workpiece to achieve the cut. Linear broaches are used in a broaching machine. Most broaching machines are hydraulic and can be a horizontal or vertical motion. Vertical machines are more popular, comprising approximately 90% of all broach machine purchases. In rotary broaching, the broach is rotated and pressed into the workpiece to cut an axisymmetric shape. A rotary broach is used in a lathe or screw machine.

Broaching is used when precision machining is required. Different types of broach tools can produce results including circular or non-circular holes, splines, keyways and more. Broaching is a specialized manufacturing process praised for its speed and uniformity; it is a highly effective process when used for high volume production runs. Purchasing broach tools from Ever Sharp Tools ensures tools of highest quality and best material. When combined with our experience in maintaining and sharpening our tools, the end result is longer tool life and lower cost per part. Contact EST today for a quote on your broach tooling needs!

What are the different types of Broach Tools?

A broach tool (usually called, simply, a broach) is similarly shaped to a long drill bit or saw, except the height of the teeth increases over the length of the tool. The desired outcome of the broaching process determines the type of broach that will be used to accomplish the task. The most common types of broaches are included in the following drawing:

Square – Round – Single Keyway – Double Keyway – Spline – Hexagon

Rectangular – Double Cut – Internal Gear – Round – Helical Groove

By Franklin Day Jones, Douglas Thomas Hamilton, Chester L. Lucas – Broaching, page 10, Public Domain,

Ever Sharp Tools (EST) is pleased to celebrate our first year of operations in our new North American Service Center building!

The EST North American Service Center is located at 10138 Radiance Drive in Ira Township, Michigan. This newly purchased facility is conveniently located on the border of Macomb and St. Clair counties, in the Detroit Metropolitan area. With more than 24,000 sq. ft. of modern industrial space, the EST U.S. Service Center is more than double our previous size. As a result, EST has room to continue adding equipment and services to better serve our customers.

Ever Sharp Tools is proud to be a member of the Association for Manufacturing Technology (AMT). The AMT is a world-renowned trade association based in McLean, Virginia. The association represents and promotes the interests of American companies in the manufacturing, machinery, and equipment industries. Founded in 1902 as the National Machine Tool Builders’ Association (NMTBA), the AMT is one of the oldest and most respected manufacturing associations still active today.

amt logo


As we navigate the ongoing COVID-19 health concern, the health and well-being of our employees and visitors is our priority. EST has established guidelines and requirements including social distancing, face coverings and health assessment procedures, as recommended by the CDC and state occupational authorities.

We ask that visitors coordinate their visit with a member of the EST Team prior to arrival to review safety procedures in place. Please feel free to contact for questions about our COVID-19 guidelines or for assistance with planning your visit!


Ever Sharp Tools, Inc. is honored to receive a 2020 Certificate of Recognition from the St. Clair County, Michigan Economic Development Alliance for investment in the local business community. EST is committed to growing our business by partnering with local resources for recruiting, training and developing our growing workforce.

.EST Award