Coining Sample and Countersink Tool

Coining simply put is the forming, thru impact of material, to take on a new shape. A common form of coining is the countersink. Form-up and form-down countersinking may be performed in the punch press.

Though various tool profiles exist for countersinking, the most common profile type is with a pilot. This design features positive stops which allow for a true coining, controlling both material roll-over and crowding. This ensures a consistent profile each time the tool is used.

The disadvantage of this tool is that the stops are set for a given material thickness. However, with the interchangeable inserts for form-down countersinks, you can easily change coin sizes and reduce tooling costs. You no longer need to trial and error on pre-punches and struggle with an inconsistent profile.

Countersink Video Still

Coining Diagram

In addition to positive stops, there is another parameter to control the quality of the countersink. It is the process of pre-punching a pilot hole prior to coining. This pre-punched hole provides an opening for the pilot stop to enter the material, control material flow, and ultimately result in a burr free pre-determined bottom hole size. A rule of thumb for determining a pre-punch hole size is: Pre-punch hole size = B – [(B – C) x .75], where B is the largest opening at the top of the countersink and C the desired opening at the bottom.

Countersinks are available in many tool styles. No matter your tool style use the Coining Tool Template to order your next coining tool. Shapes other than rounds, such as obrounds and rectangles, may also be countersunk. For these and other applications we suggest you work with our Tooling Technicians. Contact us now.


To help make the most of your 2D Shapes, use your Auto Index Station. With your auto-index, you a can add greater flexibility to your special shapes. For example, you can have one tool with multiple radii.

4-Way Radius Tool Drawing

When considering if a multi-radius tool is a viable solution for your applications, the following should be considered.

  • The tool in Figure 1 has the center point of all four radii equidistant from the center of the punch. This makes programming easier, but because the web dimensions are different, this does not allow for the combined use of slitting tools.
  • The tool in Figure 2 has equal webs. As the centerpoint of each radius is different, more attention must be given when programing. The advantage of this style tool is it may be used in conjunction with slitting tools.

No matter how you use your special shape tooling, it's best to send a .dxf file when ordering. This helps ensure the tool is designed to meet your specific needs. Not sure what design you need for your special shape? Work with our Tooling Technicians to provide a solution for your application.


Did you know that the cost of an error increases 10 Times with each step it goes undetected? The importance of catching quality problems early in the process will cost your company less than if it goes out the door.

Exponential Cost of Poor Quality

Developing a strong quality inspection process will help reduce the amount of errors that can have an exponential cost for your company.


The Application Station is a showcase of some of the latest Wilson Tool solutions intended to serve as a resource for customers in imagining the possibilities in tooling and manufacturing.


Wilson Wheel Rolling Shear Video

Wilson Wheel® Rolling Shear
The Rolling Shear creates fast, smooth, straight, or curved cuts at any programmed location on the sheet. A combination of speed and flexibility is ideal for cutting the periphery of a large part, while leaving no burrs or nibble marks. The rolling shear, from Wilson Tool International, is an excellent option for any application in which slitting, cutting, or shearing is in order. Click here to learn more about the rolling shear and the rest of the Wilson Wheel® family of tools.



Additive Injection Mold Prototype

Prompt Prototyping with an Additively Manufactured Mold
Additively manufactured molds produce real parts and can last hundreds, possibly thousands of uses – enough to get through the prototyping phase or low-run production jobs. Using an injection mold, we’ve created a lacrosse stick end-cap featuring a detailed team logo. With this method, we were able to adjust the mold until the desired part was produced. Once we have a final prototype, we can move into the production phase with a traditional steel mold, or use the additively manufactured mold, depending on the application. Explore more Solv3D solutions from Wilson Tool Additive.


Stephanie Petermann Headshot

In April 2013, Stephanie Petermann joined Wilson Tool International on the punching sales desk, in a technical support role. Stephanie’s welcoming demeanor and her capacity for product knowledge have led her to her current role: Assistant Business Unit Leader.

“We make sure we’re setting the customer up for success.”

In her seven years with Wilson Tool, Stephanie has seen some impressive things. She’s seen the extraordinary, like the company president flying a hot tool to California over the 4th of July Holiday – but she’s just as impressed with day to day operations. “I’m most proud of how quickly we can find a solution for a customer that’s in need…we really work together to find a viable solution for the customer.”

Last winter, during a particularly bad snowstorm, Stephanie lost her wedding ring while clearing snow from her car. “It was the end of the day, people wanted to go home, and I lost my ring in a foot and a half of snow.” With a smile, Stephanie recalls the search effort that ensued. “People from applications, marketing, HR, people from the shop, the sales desk…all helping to sift through snow. It took over an hour, but someone actually found it!” “We look out for our customers, but we also look out for each other.”

A true Minnesotan, Stephanie grew up going to the lake and likes to spend time on the boat with her husband, son and daughter. She also enjoys golfing and snowmobiling, where she’s sure to wear a glove on her ring-hand.


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Have a question? Struggling with an application? Need help with tooling? Contact a tooling technician at 800-328-9646, or fill out our Contact Form.