U-Model Inline Impact Press

Integrated U-Model Inline Impact Presses

Durable Technologies' U-Model inline impact presses are simple to set up, easy to operate, and offer excellent repeatability. They provide significant advantages in terms of control, safety, reliability, and are low maintenance. Your U-Model integrated press can be operated automatically using hand controls (control package options listed further below) or manually by pulling the lever. Since these are spring-actuated and don't require gravity for operation they can be used in any position - vertically, horizontally, and even upside down! U-Model inline presses can be integrated into machining centers, testing stations, mounted inline or anywhere else a stand-alone bench model would be impractical.

In addition to stamping and marking, our presses can be used for many other manufacturing applications including: riveting, staking, forming, punching, bending, crimping, piercing, assembling, broaching, and coining.

Durable Technologies can provide you with a turnkey impact press package including custom steel shank stampssteel typetype holders, and manual or automatic numbering heads depending on your specific part marking requirementsWe can also help you design a custom fixture for your parts to hold them safely and securely in place while marking.

(Check out our blog post which covers the versatility of our impact presses across a variety of manufacturing applications).

Impact Press Principles of Operation

Since these presses operate on a spring-actuation principle, the degree of impact is easily adjustable. The press contains a spring that is compressed during energy section travel. Press capacity can be easily adjusted by increasing or decreasing spring size and/or tension. When the release point is reached, the compressed energy is discharged causing the internal hammer to deliver the powerful impact. There are a variety of sizes of springs available for each of our impact press models. Vertical travel is accomplished by a gear and rack arrangement.

Step 1 - The energy section advances towards the workpiece by gear rack and pinion, powered either automatically by double-acting pneumatic cylinder (if using a pneumatic unit with hand controls) or manually by the operator pulling down the lever.

Step 2 - Once the press stroke is engaged and the workpiece is contacted, the press stroke continues. The workpiece is held in place by the pressure from the energy section (this is a significant safety feature). The impact spring is compressed and builds force as the press continues to maintain contact with the workpiece.

Step 3 - When the ball bearings reach their release point, the powerful impact is discharged. The impact spring delivers force to the hammer, which in turn strikes the plunger (tool holder). You can control the amount of impact depending on which spring you choose and how much tension is applied.

U-Model Impact Press Models

  MV12VPS** MC-21U MC-35U
  MV12VPS mc-21u impact press mc-35u impact press
Max. Impact 3/4 ton 3-3/4 tons 7-1/2 tons
Max Stroke 1.260" (32mm) 1-7/8” 2”
Shank Size 6mm dia. x 27mm 10mm dia. x 38mm 16mm dia. x 48mm
Impact Springs


Light* (2.2mm)

Light (2.2mm)

Heavy (3.8mm)

Medium* (3.5mm)

Light (3.0mm)

Extra Heavy (7.5mm)

Heavy* (7.0mm)

Medium (6.5mm)

Net Weight  8 lbs. 55 lbs. 130 lbs.
Air Pressure Req. 80-90 PSI 80-90 PSI 90-100 PSI
Free Travel Prior to Trip 1.575" (40mm) 1-11/16”


Download Manual MC-21U Manual
MC-35U Manual
Download CAD Drawing MC-21U CAD Drawing
MC-35U CAD Drawing
Download Spec Sheet MC-21U Spec Sheet MC-35U Spec Sheet

* Installed with standard press package (other sizes available).

** MV12VPS supersedes MC-19U (MC-19U press is no longer available but spare parts are still available). Mounting brackets sold separately.

Our sales and application engineers are ready to develop any other industrial traceability and marking solution that is right for you.

Control Package Options for U-Model Impact Presses





renco control unit

Renco Control Package with two buttons on either end, integrated 4-way pneumatic control valve, filter-regulator, and all required hoses and fittings. Compatible with impact press models MC-19, MC-19U, MV12VPS, MV21 and MC-21U. Click here to see the Renco controls in operation.





dual palm controls for pneumatic press

Ross Control Package with two push buttons, integrated 4-way pneumatic control valve, filter-regulator, and all required hoses and fittings. Compatible with impact press models MV21, MC-21U, MV35 and MC-35U.

Impact Presses

Download the Impact Press Guide
How to Select an Impact Press
Download the Impact Press Capacity Chart
Download the Marking Standards Guide

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U-Model Impact Presses on our Blog