| National
Bushing & Manufacturing Corp. |
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| Drill Bushing Specifications |
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I.D. Range |
Standard I.D. Tolerance |
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All press fit bushings have lapped, honed or ground
I.D.'s. Bushings with I.D.'s up |
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(Drill Size) |
(add to nominal I.D.) |
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to 1.0" are concentric to .0003" max.
T.I.R to the O.D. Larger sizes are
concentric |
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#80 to 1/4 |
+.0001 to +.0004 |
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to
.0005" T.I.R. to the O.D. |
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Over 1/4 to 3/4 |
+.0001 to +.0005 |
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Over 3/4 to 1-1/2 |
+.0002 to +.0006 |
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Unground
bushings with .010 / .020" grinding stock on the O.D. are |
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Over 1-1/2 to 2-3/4 |
+.0003 to +.0007 |
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concentric within .006" The letter "U" is added to the
part number ie, "LU." |
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Reamer Bushings |
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Standard and Special bushings will be manufactured
using E52100 |
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I.D. Range |
Standard I.D. Tolerance |
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material
heat treated to a minimum of Rc 62-64 unless otherwise |
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(Std. Reamer Size) |
(add to nominal I.D.) |
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instructed by the customer. |
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#80 to 1/4 |
+.0005 to +.0008 |
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Over 1/4 to 1" |
+.0006 to +.0010 |
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No-counterbore bushings will be supplied unless
otherwise specified. |
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Over 1" |
+.0008 to +.0012 |
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Ordering Information |
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Pcs. |
P |
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48 |
12 |
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Quantity |
Type |
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Outside |
Length |
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Inside |
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Diameter |
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Diameter |
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P = Headless Press Fit |
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O.D. in |
Lengths in |
I.D. in four place |
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H = Head Press Fit |
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64ths of 1" |
16ths of 1" |
decimals weather |
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SF = Slip/Fixed Renewable |
(48 = 3/4") |
(12
= 3/4") |
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inch or metric. |
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F = Fixed Renewable |
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L = Liner Bushing |
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HL = Head
Liner Bushing |
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U = Unground |
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C = Carbide |
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Bushings are typically ordered by using the part
number structure shown above. If you
are not sure of the bushing |
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dimensions that will fill your needs start with the
inside diameter and review the O.D. and lengths available in the |
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catalog pages 6 through 20. Please feel free to call if there is any
way we can help you find the right bushing. |
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Carbide Bushings add "C" in front of the
Type code, ie, CH-64-12-.5000 |
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Titanium Nitride Bushings (TIN) add "T" in
front of the Type code, ie, TH-64-12-.5000 |
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Unground Bushings add "U" after the Type
code, ie, HU-64-12-.5000 |
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Metric Bushings add "M" after the Type
code and then the metric sizes for O.D. and Length followed by the I.D. |
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size in metric
decimals. Example:
HM-42-25-30.00 is 42mm O.D., 25mm Long and 30mm ID. |
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Phone: 847-847-1553 Fax:
847-847-1554 |
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5 |
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home |
Table of Contents |
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5 |
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