CUMSA Marking Units

For in-die stamping numerical data on parts

Available in 4 and 6 wheel units

The CUMSA Marking Unit from Dayton Lamina features 3.8mm (.150") tall easy to read numbers to mark parts with date, part number, lot number or other numerical identifiers. Each wheel features numbers "0" thru "9" plus a blank providing multiple combinations. Available in 4 and 6 wheel configurations, it is a simple process to change the numbers in the self-contained unit.

The unit can be surface mounted in a die, mounted in a pocket, even cam mounted if you have an angular surface. Depth of penetration of the number can be adjusted by grinding or shimming the hard bottom plate of the unit. This allows for proper control of the appearance of the numbers when dealing with different materials.

The CUMSA number wheels are made of tool steel and fully hardened for a long service life. In the event a new wheel is needed, the change is a simple process.

  • Traceability for sheet metal parts
  • Available with 4 and 6 wheels
  • Quick and easy change of wheel's position without removing from the die


How to Order

Specify: Qty. Catalog #
Example: 2 UM 043642
  1 RR 180311




Marking Unit

UM Marking Unit



Interchangeable Wheel


RR Interchangeable Wheel



Installation & Usage Instructions

To mount marking unit on a die

Mounting 1



To turn wheels

Mounting 2



To remove marking unit from the die

Mounting 3



To change a wheel

Mounting 4

Product Code:   
(sample image)




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rolling date stamps, imprint