custom brushes
industrial brushes
medical

Custom Brush Construction

A Custom Brush is a Tool

The purpose of a brush is to clean and/or score a contaminated surface, and the design/selection of the custom brush is vital to its performance. A Mill-Rose custom brush effectively balances the following design criteria, maximizing performance and life while minimizing required power:

  • Length and diameter of the fill wire
  • Hardness and durability of the fill wire
  • Strength and flexibility (length & diameter) of the stem wire

For example, Mill-Rose fitting brushes are designed to clean and score the fitting, allowing for a stronger solder joint. These brushes are manufactured with the highest quality fill wire, trimmed so the tip of the wire does the work (scoring).

Usage

First, select the proper brush, referring to the sizing chart. O.D. (actual) sizes are generally specified for refrigeration fittings. I.D. (nominal) sizes are generally specified for plumbing fittings.

Second, always rotate the brush in a clockwise direction when the brush points away from the user. This tightens the brush construction.

Warning: Reversing a twisted-in-wire brush may loosen the stem wire causing a loss of fill bristles.

Sizing Chart
(Actual) O.D. Fitting Size (Nominal) I.D. Fitting Size
1/4" 1/8"
3/8" 1/4"
1/2" 3/8"
5/8" 1/2"
3/4" 5/8"
7/8" 3/4"
1" 7/8"
1-1/8" 1"
1-3/8" 1-1/4"
1-5/8" 1-1/2"
2-1/8" 2"
2-5/8" 2-1/2"

Wire Gauges

Decimal equivalent in inches & diameter in millimeters.

Wire Guages
Guage # Diameter in Inches Diameter in Milimeters
20 .035 .89
23 .026 .66
24 .023 .58
25 .020 .51
26 .018 .46
28 .016 .41
30 .014 .36
32 .0128 .33
33 .0118 .30
34 .0104 .26
35 .0095 .24
36 .009 .23
38 .008 .20
43 .006 .15
47 .005 .13