All SPE & SPI Finishes

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Diamond Finishing

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Prep for Textured Surfaces

Any 3D Files for Quote



Phone: 269-468-4407
Fax: 269-468-4407

320 Park St
PO Box 71
Coloma, MI 49038


SPI Finish A-1 -- Grade #3, 6000 Grit Diamond Buff
SPI Finish A-2 -- Grade #6, 3000 Grit Diamond Buff
SPI Finish A-3 -- Grade #15, 1200 Grit Diamond Buff
SPI Finish B-1 -- 600 Grit Paper
SPI Finish B-2 -- 400 Grit Paper
SPI Finish B-3 -- 320 Grit Paper
SPI Finish C-1 -- 600 Grit Paper
SPI Finish C-2 -- 400 Grit Paper
SPI Finish C-3 -- 320 Grit Paper
SPI Finish D-1 -- 600 Stone Prior to Dry Blast Glass Bead #11
SPI Finish D-2 -- 400 Stone Prior to Dry Blast #24 Oxide
SPI Finish D-3 -- 320 Stone Prior to Dry Blast #24 Oxide
SPE -- The Society of Plastic Engineers
SPI -- The Society of the Plastic Industry

Part Polishing Steps
Polishing Steps
(Stepping up from finish to finish)
 
 
A-1 #3 Diamond
13
12
11
10
8
7
6
4
2
0
A-2 #6 Diamond
11
10
9
8
6
5
4
2
0
2
A-3 #15 Diamond
9
8
7
6
4
3
2
0
2
4
B-1 600 Paper
7
6
5
4
2
1
0
2
4
6
B-2 400 Paper
6
5
4
3
1
0
1
3
5
7
B-3 320 Paper
5
4
3
2
0
1
2
4
6
8
C1/D1* 600 Stone
3
2
1
0
2
3
4
6
8
10
C2/D2* 400 Stone
2
1
0
1
3
4
5
7
9
11
C3/D3* 320 Stone
1
0
1
2
4
5
6
8
10
12
EDM Surface
0
1
2
3
5
6
7
9
11
13
EDM
C3/D3*
C2/D2*
C1/D1*
B3
B2
B1
A3
A2
A1
Surface
320 Stone
400 Stone
600 Stone
320 Paper
400 Paper
600 Paper
#15 Diamond
#6 Diamond
#3 Diamond

 
The finish value is a relationship between the initial finish (machined surface) and the required final finish. The coefficient, as shown is based on three primary machining surfaces being manually polished to one of two SPI/SPE finished surface requirements. The coefficient values have the lowest values at the upper left corner of the chart with a fine start finish and a coarse polished finish. As the start finish becomes coarse and/or the polish finish becomes finer the coefficient value will increase. An example of this is that it would take one hour to polish one square inch of an EDM finish to a B2 (400 paper) finish, likewise it would require two hours to polish one square inch of an EDM finish to an A3 (15 Diamond) finish.

 
Diamond Polishing | Benching | Polishing | Stone Polishing | Berrien County | Tooling Coalition
 
Diamond Polishing | Mold Polishing | Polishing | Stone Polishing | Berrien County | Tooling Coalition

 
 
 
 
 
 
 
 
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