Mag Pen – Handheld Magnetic Sweep

Mag Pen – Handheld Magnetic Sweep

  • Mag Pen
    Mag Pen
  • Cleaning out a Mill Vise
    Cleaning out a Mill Vise
  • Cleaning out a Lathe Bed
    Cleaning out a Lathe Bed
  • Cleaning out a Lathe Chuck
    Cleaning out a Lathe Chuck
  • Cleaning out T-Slots
    Cleaning out T-Slots


The Mag Pen is a small handheld magnetic sweep designed to make it easy to do light cleanup up iron based materials from a machine or working surface. The idea came about after doing some hard milling on some 4140. This was done on a CNC machine and no amount of air blasts, brushes or vacuuming was easily going to clean it out of the t-slots, or machine vise. After spending several weeks of picking steel out of the nooks of the machine we decided there has to be an easier way. A magnet was a clear choice but there wasn’t a magnetic sweep on the market designed to get into tight spaces and to be a simple small form factor. We decided to build our own.

The tool features a 5/16 tip made of raw aluminum to easily get into tight places and pull out chips without scratching the cast iron, or steel of machines. The cap is magnetically retained and offers enough distance from the enclosed magnets to put the pen in with other tools without having annoying retention problems.


  • Dimensions:
    • Overall 6″ x 3/4″
    • Tip 5/16″ x 1 1/2″
  • Materials:
    • Body/Tip/Cap – 6160 Raw Aluminum Brushed Finish
    • Magnets- N50 & N52 Rare Earth
    • Shaft – 3″x3/16″ Alloy Dowel
  • Lubrication: CRC 3-36 Multi-Purpose Lubricant and Corrosion Inhibitor
  • Retention Compound: Loctite Green 609 Medium Strength


    1. Pull the Cap off, drag tip over surface you wish you pick up iron based chips
    2. Move the pen over where you plan to dispose of chips and rapidly pull back on rear plunger.
    3. If anything remains a quick air blast with the plunger retracted can be used to clear it.
    4. Put cap back on for safe keeping

In Use


Please contact us for international orders.

Mag Pen $65 + $4 S/H

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