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Rod Size for Die Threading

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Thread Specification: 

Examples:

#10-32
10-32
In Numbered machine screw thread (#1 through #12)
1/4-20
1/4"-20
0.25-20
In Fractional UNC thread (1/4" through 1")
1/2-20
1/2"-20
0.5-20
In Fractional UNF thread (1/4" through 1")
M6
M6x1
6x1
mm Metric coarse thread (M1 through M22)
M6x0.75
M6x.75
6x.75
6mm x.75
mm Metric fine thread (M1 through M22)
0.255-40
.255-40
0.255"-40
In Non-standard thread (0.06" through 1.0")

 

Reducing the size of a rod you want to thread with a die makes it easier to start the die,
but the real secret is to add a 30° chamfer to the end of the rod.

Die Blank Size is the Major Diameter less 10% of the Pitch.
This is about the same as common bolts.

 
Boring Head Set, R8, Indexable with 4 Boring Bars
  • Includes boring head, R8 shank, and 4-piece indexable boring bar set
  • The boring head offsets up to 5/8", dial is graduated in 0.001"
  • Minimum bore diameter is 7/16"; Maximum boring diameter is 5.906"
  • Maximum boring depth is 2.5"
  • The included indexable boring bars come with TCMT 21.5 C6 carbide inserts for steel and alloy

$219.95

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Lathe Chuck, 4-Jaw 4", Independent, Premium, Harlingen
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  • 4" (100 mm) diameter
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  • Spring loaded 3/4” travel fits most drills, mills, lathes or jig borers
  • Capacity: 0” - 1/8" (0 - 3mm ) Keyless drill chuck

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