Micro Plunge Base: for High Speed Rotary Tools


“The term ‘precision’ tends to be thrown around with abandon, but in this case, it’s warranted. Imagine gene-splicing a micrometer with a plunge base and then shrinking it; that’s the new Micro Plunge Base from Micro Fence” — Brad Holden, American Woodworker Magazine

The Micro Plunge Base was designed with fine detailing in mind. It’s a smaller (4″ diameter base), lighter plunge mechanism with the patented micrometer dial to provide measurement for depth-of-cut. It features silky smooth plunge action, extreme stability, and precision with maximum visibility. This is an all US-made machine tool made of solid aluminum and hard chrome-plated stainless steel with stainless springs, bronze sleeve bushings, and acrylic tool inserts. It is fabricated to precise standards and is all corrosion/rust resistant.

The Micro Plunge is ideal for light-duty jobs such as installing small hardware (like jewelry boxes), architectural detailing, inlay work, picture frame-building, luthier work, scale model building, and precision repair requirements.

The Micro Plunge comes with some basic accessories that add to its versatility. There are also optional additions that can further the tool’s applications. Included is one Acrylic Insert for the motor of your choice (see the drop-down box below to select your model), a pair of Auto-Centering Bearings, a Ball-Tipped Driver for assembly and adjustment, a sample bottle of the spindle oil we use, and all appropriate hardware to set-up and run. Other accessories are listed below and shown in the thumbnail pictures to the left (more information on each accessory is available on the Accessories page).

If you’re interested in a more complete kit, our Package Deals page offers combinations that include our foundation pieces with the Micro Plunge.

Note: Edge Guide or Circle Jig owners who purchase the Micro Plunge will also need the Mounting Bar to fit it properly. You can select it below, along with other important accessories.

  • 4″ Diameter Horseshoe style base
  • Overall Vertical Travel 1.875″
  • Wt: 1.6 lbs;  2.85 lbs w/ Edge Guide
  • Vertical Adjustments to .001″
  • Compatible w /PC Template Guide Bushings


Mounting Bar

Enables our Edge Guide to be used with the Micro Plunge

Light Ring

Our six LED Light Ring circuit board w/ wall plug transformer

Dust Hood Kit

Top Dust shroud w/hose adapter

Maintenance Kit

DynaGlide Dry Lube, snap-ring pliers and everything to keep your equipment operating at peak smoothness and efficiency

Center Bar & Inboard Leveler Kit

Smaller circles from 1/2″-12″

Guide Bushing Insert

Insert accepts 1 3/16″ Guide Bushings in the Micro Plunge Base

Guide Bushing Precision Sub-base

Sub-base w/ counter-bored holes for alignment

Precision Template Guide Bushing Set

1/8″ , 1/4″ , 3/8″ , 1/2″ Guide Bushings, Stainless Centering Hubs, Centering Pin Gauge and Collet Adapter in a Walnut /Beech Storage Box. Concentricity spec: .0005″

SKU: MPB Category:


Foredom 44T
Dremel 8220 Cordless
Proxxon IB/E

Additional information

Weight 1.8 lbs
Dimensions 6.5 x 6.5 x 7.5 in

Imperial, Metric


Dremel 300 Series, Dremel 3000, Dremel 395, Dremel 400, Dremel 4000, Dremel 7300, Dremel 770, Dremel 8100, Dremel 8200, Dremel 8220, Foredom 44T, Foredom MH-170, Milwaukee M12 (2460-20), Powercrafter, Proxxon FBS 115/E, Proxxon I B/E, Proxxon I BS/E, Proxxon Micromot 50/E