Sunday, October 31, 2010

2010 Fabtech Show

This year's Fabtech show is this week already! This year the show is being held in The Georgia World Congress Center in Atlanta, Georgia. If you are heading to the Fabtech show this week, come stop by our booth #2017 and see what's new with Cleveland Punch and Die. Joining us in our booth this year will be Mr. Karl Vogel of Component Tooling LLC and Mr. Bill Hayes of Hayes and Associates. As always, we are looking forward to the show to see our old friends and to meet new potential customers. Check out the Fabtech website at for more information on the show. We hope to see you there!

Thursday, October 28, 2010


Does my machine have enough tonnage to be able to punch the hole that I need to punch?

Let’s say for instance, you have a 50 ton machine and you want to punch a 5/8” round hole through 1/2” A-36 mild steel. Do you have enough tonnage? Using the formula in the chart: LTS/2000 we calculate

                           1.9635 x .500 x 60,000 =29.45 tons

This means that 29.45 tons of pressure is required to punch a 5/8” hole in 1/2” material. Your machine is 50 tons, so you will have enough tonnage to punch that hole.

For punching materials with a different shear strength than 60,000 PSI as listed in the tonnage charts, it is necessary to use a multiplier for calculating the proper amount of force required to punch the hole.

EXAMPLE: From our previous example, to punch a 5/8” round hole through ½” A-36 mild steel, the force required is 29.45 tons. If this material is stainless steel, with a shear strength of 70,000 PSI, (according to the chart below), the correct multiplier to use is 1.17 therefore;

29.45 tons x 1.17 = 34.46 tons, actual force required.

If you have any questions please contact our "Green Team" for assistance. We can be reached at 888-451-4342 from 7am to 6pm EST.

Wednesday, October 20, 2010

Punch and Die Set of The Week!

Every week we have exciting things happening at The Cleveland Punch & Die Company! This week we completed manufacturing a Half Lattice and Punch Set. This punch and die set shears a radius on a piece of flat bar and punches a hole at the same time. It’s as easy as 1, 2, 3! First, load the punch and die into your machine. Second, place the material on top of the die, then simply cycle the machine. This application has a bolt-on mechanical stripper/back gauge which acts as a guide for the material while also assisting in stripping the punch out of the die, making this application very user friendly.

This punch and die set is commonly used in the manufacturing process of handles or brackets. The customer using this particular set is shearing and punching both ends of a piece of 1-3/16” wide flat bar. The customer will then use their press brake attachment on their ironworker to bend the material into a handle or bracket.

The Cleveland Punch & Die Company is ready and eager to help you with all your special projects! We love coming up with creative solutions for all your punching needs. If you have a punching application you want to do, but are not sure how or if it can be accomplished, give us a call and we will use our 130 years of experience to design a punch and die set that will work best for you.

Friday, October 8, 2010

Remember to Check Your Diagonals!

You must check the diagonal of your square sizes to ensure that the punches will pass through the bore of your coupling nut without interference. The diagonal of a square can be determined by multiplying the size of the square by 1.414, or refer to our diagonal table.

There may also be occasions when it is necessary to check the diagonal of your hexagon size to ensure that the punch will pass through the bore of your coupling nut without interference. The diagonal of a hexagon can be determined by multiplying the size of the hex by 1.1547, or refer to the hexagon diagonal table below.

You must also check the diagonal of your rectangle punches. The diagonal of a rectangle can be determined by the Pythagorean Theorem: A²+B ²=C². The "A" dimension and "B" dimension are the two sizes of the rectangle and "C" equals the diagonal of the rectangle.

You could also refer to the rectangle diagonal table below.

Example:  You need to punch 13/16” square holes.  Suppose your  machine requires that you use F-16 punches and your coupling nut is a CN-16.  You first need to turn to the coupling nut pages in your Cleveland Punch & Die Core Catalog.  On the left side of the page, locate the CN-16 coupling nut.  Run your finger to the right to determine the bore size.  The bore size measures 1.070.


Using the diagonal formula: 13/16” x 1.414 = 1.148. This diagonal exceeds the 1.070 bore of the coupling nut which means that the corners of the square will not pass through the nut. In this case, there are two options that we have to proceed with this application. You can file out the corners of your coupling nut to allow the 13/16 square to pass through or we can make you a coupling nut with a special square bore. This can be done for rectangle and hexagons as well.

For more information on shape diagonals, please contact one of our experienced “Green Team” members at (888)451-4342 from 7am-6pm Monday through Friday.

Friday, October 1, 2010

Trivia - Back to the Basics of Punching

Here at The Cleveland Punch and Die Company we are dedicated to providing our customers with the highest quality customer service in the industry. Our customer service personnel, known as "The Green Team", strives to provide our customers with a friendly and courteous experience every day. Our goal is to share the knowledge we have gained over the years with each and every one of our customers.

Determining the clearance between the punch and die is one of the most common issues we face on a daily basis. Today's trivia will help to address these issues!

Question #1:
If you are punching a 5/16" round hole through 1/4" A36 mild steel, what size die should be used?
When punching 1/4" to 1/2" thick mild steel, a 1/32" clearance should be used. In this application an 11/32" die would be appropriate.

Question #2:
If you are punching a 5/8" X 1" oblong hole through 1/4" aluminum, what size die should be used?
The suggested clearance for aluminum is 10% of the material thickness. In this particular application the clearance would be .025" (.250" thick aluminum X .010 = .025"), making the die size .650" X 1.025". While Cleveland Punch can manufacture our customers any desired die clearance, a .025" clearance would be a specialty made item. In many instances a standard 1/32" clearance would work just fine, but may produce a slight burr on the bottom of the material being punched.

Green Team Tip: The material thickness should never exceed the punch dimension!

Question #3:
If you need to punch a square hole for a 3/4" picket, what size punch and die should be used. (Material Thickness is 3/8" stainless steel)
The suggested punch size for this application is a 25/32" to allow the square picket to be passed through the hole once it is punched. Suggested clearance for stainless steel is 18% of material thickness. This application would call for a .067" clearance (.375" thick material X .18 = .067"). This die would also be a special item. However, a 27/32" die (.843") would work just fine.

Refer to the following charts for the suggested clearance on various materials. If you have any questions please contact our "Green Team" for assistance. We can be reached at 888-451-4342 from 7am to 6pm EST.