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Services:
I/D - O/D - Centerless - Honing -
Surface Grinding
Tenkku Precision Grinding specializes in CNC cylindrical external
and internal grinding. We have the capabilities to hold the tightest
tolerances and surface finishes by using our precision equipment
coupled with over 35 years of grinding expertise. We have the
equipment to run small prototype quantities or large production
runs. Our machines are capable of a wide range of sizes, however we
specialize in grinding smaller diameters and lengths with more
complex features.
Cylindrical External (OD) Grinding Capabilities
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 Diameters
from 0.030"-6.000" Diameter
o Specializing in 0.030"-1.500" Diameter
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Shaft length capacity to 39"
o Specializing in shaft lengths < 6"
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Tolerances to ± .00005"
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Cylindricity to .00002" (.5 micron)
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Concentricity to .00004" (1 micron)
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Surface finishes to 2 micro inch
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CNC Cylindrical Center Type grinding allowing for multiple
diameters, angles, tapers, or radius grinding to be completed in
one machining operation.
Cylindrical Internal (ID) Grinding Capabilities
-
 Diameters
from 0.030"-6.000" Diameter
o
Specializing in 0.030"-1.500" Diameter
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Bore length capacity to 4"
o
Specializing in bore lengths
< 3"
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Tolerances to ± .00005"
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Cylindricity to .00002" (.5 micron)
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Concentricity to .00004" (1 micron)
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Surface finishes to 2 micro inch
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Our dual spindle machine allows for multiple IDs to be ground in
a single operation.
 Centerless
Grinding Capabilities
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Thru-Feed or In-Feed
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Diameters from .060" to 1.000"
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Maximum plunge length of 4"
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Tolerances to ± .00005"
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Cylindricity to .00004" (1 micron)
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Finishes to 4 micro inch
Honing Capabilities
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 Diameters
from 0.0625" to 1.250"
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Maximum length 6"
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Tolerances to ± .00005"
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Cylindricity to .00004" (1 micron)
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Surface finishes to 4 micro inch
Surface Grinding Capabilities
Lapping Capabilities
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Diameters from 0.0625" to 1.250"
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Bore lengths up to 2"
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Tolerances to ± .00002” (1 micron)
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Surface finishes to 2 micro inch
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