Model 301

The Model 301 Hand-Operated or 301A Air-Operated presses are economical machines for light duty marking of round parts with an even depth of impression. Built for industrial applications, you can stamp characters up to a 1/4” in aluminum and 5/32″ characters in mild steel. Despite its compact bench-top size, this press is able to incorporate oversize endplates for larger diameter parts.


The Model 301 is a hand-powered press. To operate it, place the round part in the adjustable holding fixture and manually pull the operating handle. The marking device (one of our Numbering Heads, Type Holders, or Marking Dies) is pulled across the part. The part rotates in the fixture as the code is stamped around the part, all in one motion. At the end of the stroke, change the part and repeat the process on the return cycle.

An adjustment knob on the sliding head dovetail provides positive marking depth adjustment. A special rectangular shank is required to adapt the marking device to the sliding head. When setting up, place a part in the fixture, move the sliding head over the part. Turn the adjustment knob until the marking device touches the part. Move the sliding head to one side and turn the adjustment knob 1/4 of a turn. Mark a part and check for stamping depth. Move the adjustment knob in or out for proper stamping depth. Brass gibs on the dovetail and sliding head can be adjusted for wear and also tilt the marking device to correct for any part taper.

Numberall’s Marking Devices that are compatible* with the Model 301:

Generally with a Model 23P Type Holder and our standard adjustable holding fixture, you can mark parts from 3/8” to 1-5/8” diameter. We offer oversize endplates for more clearance by requesting the Oversize Roll Marking Machine. The first oversize endplates will give an additional 2-1/8” of clearance. Meanwhile, the second will give an additional 4-1/4” of clearance.
*Compatibility is based on character size, number of lines and type of material.

**It is best to obtain sample stampings for multiple line applications.


*Numberall has designed custom fixtures to stamp the edges of coins and medallions without marring the surfaces. We also have fixtures with interchangeable arbors for stamping hollow parts or rings. For parts with varying part diameters or stepped parts, our standard adjustable holding fixture rollers can be modified to hold the part securely when marking.

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