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Brush Seaters - Selection guide at the bottom of this page.
Commutator Stones here
Contact Cleaners here
Part Prefix
 Price
Dimensions
14
 $4.00
Grade
0.125" x 0.250" x 4.750"
13
 $4.00
Grade
0.250" x 0.250" x 4.750"
18
 $4.50
Grade
0.250" x 0.375" x 4.750"
12
 $5.00
Grade
0.250" x 0.500" x 4.750"
11
 $6.00
Grade
0.250" x 0.750" x 4.750"
15
 $5.50
Grade
0.375" x 0.375" x 4.750"
10
 $6.00
Grade
0.375" x 0.500" x 4.750"
9
 $8.00
Grade
0.500" x 0.500" x 4.750"
8
 $9.00
Grade
0.500" x 0.750" x 4.750"
6
 $12.00
Grade
0.500" x 1.000" x 4.750"
Part Prefix
 Price
Dimensions
7
 $11.50
Grade
0.625" x 0.750" x 4.750"
5
 $12.00
Grade
0.625" x 1.125" x 4.750"
4
 $14.00
Grade
0.625" x 1.250" x 4.750"
16
 $13.00
Grade
1.000" x 1.000" x 4.750"
17
 $23.00
Grade
1.000" x 2.000" x 4.750"
3
 $29.00
Grade
1.125" x 1.250" x 4.750"
2
 $22.00
Grade
1.250" x 1.500" x 4.750"
1
 $29.00
Grade
1.250" x 2.000" x 4.750"
21
 $78.00
Grade
2.000" x 3.000" x 6.000"
20
 $100.00
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