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Brush Seaters - Selection guide at the bottom of this page.
Harmonization Schedule (HS) and Schedule B Number:  6804220000
Commutator Stones here
Contact Cleaners here
Part Prefix Price
Dimensions
14 $8.06
Grade
0.125" x 0.250" x 4.750"
13 $8.09
Grade
0.250" x 0.250" x 4.750"
18 $9.95
Grade
0.250" x 0.375" x 4.750"
12 $10.56
Grade
0.250" x 0.500" x 4.750"
11 $13.38
Grade
0.250" x 0.750" x 4.750"
15 $11.33
Grade
0.375" x 0.375" x 4.750"
10 $13.38
Grade
0.375" x 0.500" x 4.750"
30 $9.75
Grade
10mm x 10mm x 120mm
9 $16.31
Grade
0.500" x 0.500" x 4.750"
8 $17.87
Grade
0.500" x 0.750" x 4.750"
6 $21.00
Grade
0.500" x 1.000" x 4.750"
Part Prefix Price
Dimensions
7 $20.15
Grade
0.625" x 0.750" x 4.750"
5 $24.00
Grade
0.625" x 1.125" x 4.750"
4 $24.50
Grade
0.625" x 1.250" x 4.750"
16 $22.75
Grade
1.000" x 1.000" x 4.750"
17 $40.25
Grade
1.000" x 2.000" x 4.750"
3 $50.75
Grade
1.125" x 1.250" x 4.750"
2 $38.50
Grade
1.250" x 1.500" x 4.750"
1 $51.21
Grade
1.250" x 2.000" x 4.750"
21 $136.50
Grade
2.000" x 3.000" x 6.000"
20 $186.50
Grade
2.000" x 3.000" x 8.000"
     Brush Seaters: These stones are used to contour carbon brushes to the shape of the commutator. This reduces sparking and increases motor efficiency. For brush seating, select a stone that has a width equal to or slightly larger than the brushes that are to be seated. For commutator cleaning, select a stone that is about 3/4 the width of the commutator bar and a thickness that easily fits between the brush riggings. For slip rings, select a stone that is about 1/2" wider than the ring.
 
     Grades & Applications :
  • ES: Extra Soft - For slip rings - Sizes bigger than 0.500 x 1.000"
  • FH: Fine Hard - Small motors: Vacuum cleaners, fan motors, automibile generators, etc.
  • MS: Medium Soft - General purpose large motors - Sizes bigger than 0.250 x 0.750"
  • MH: Medium Hard - Similar application as MS grade but slightly harder