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DFARS Specialty Metals
Export Control Classification Number (ECCN)
Expanding-End Lathe Mandrels
 |
OD | Overall Lg. | Shank Dia. | End Expansion | Material | Each | ||
|---|---|---|---|---|---|---|---|
| 1/4" | 3" | 1/4" | 0.002" | Steel | 2779A11 | 000000 | |
| 3/8" | 3" | 3/8" | 0.002" | Steel | 2779A12 | 00000 | |
| 1/2" | 3" | 1/2" | 0.002" | Steel | 2779A13 | 00000 | |
| 5/8" | 3" | 5/8" | 0.002" | Steel | 2779A14 | 00000 | |
| 3/4" | 4" | 3/4" | 0.002" | Steel | 2779A21 | 00000 | |
| 7/8" | 4" | 7/8" | 0.002" | Steel | 2779A22 | 00000 | |
| 1" | 4" | 1" | 0.002" | Steel | 2779A23 | 00000 | |
| 1 1/4" | 4" | 1" | 0.002" | Steel | 2779A24 | 00000 | |
| 1 1/2" | 4" | 1" | 0.002" | Steel | 2779A25 | 00000 | |
| 1 3/4" | 4" | 1" | 0.002" | Steel | 2779A26 | 00000 |
Wide-Diameter Range Lathe Mandrels
 |
OD | Overall Lg. | Sleeve Lg. | Total Indicated Runout (TIR) Accuracy | Material | Each | ||
|---|---|---|---|---|---|---|---|
| 1/2" to 9/16" | 5" | 2 1/2" | 0.001" | Steel | 3276A31 | 000000 | |
| 9/16" to 21/32" | 6" | 2 3/4" | 0.001" | Steel | 3276A32 | 00000 | |
| 21/32" to 3/4" | 7" | 2 3/4" | 0.001" | Steel | 3276A33 | 00000 | |
| 3/4" to 7/8" | 7" | 3 1/4" | 0.001" | Steel | 3276A34 | 00000 | |
| 7/8" to 1" | 7" | 3 1/2" | 0.001" | Steel | 3276A35 | 00000 | |
| 1" to 1 1/4" | 9" | 4" | 0.001" | Steel | 3276A38 | 000000 | |
| 1 1/4" to 1 1/2" | 9" | 4" | 0.001" | Steel | 3276A39 | 000000 | |
| 1 1/2" to 2" | 11 1/2" | 5" | 0.001" | Steel | 3276A42 | 000000 | |
| 2" to 2 3/4" | 14" | 6" | 0.001" | Steel | 3276A43 | 000000 | |
| 2 3/4" to 3 3/4" | 17" | 7" | 0.001" | Steel | 3276A44 | 000000 |
Machine-Your-Own Inside-Grip 5C Lathe Collets
 |
The head on these collets acts like a mandrel to support the inside of a hollow workpiece. An expanding screw widens the head to firmly grip the workpiece. It can be machined to fit the exact ID of your part. All have external threads.
Head Dia. | Head Thk. | Min. Machined Dia. | Total Indicated Runout (TIR) Accuracy | Body Dia. | Overall Lg. | External Thread Size | Material | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|
Machine-Your-Own Inside Grip | |||||||||||
| 1/2" | 1" | 0.25" | 0.0005" | 1 1/4" | 4 1/2" | 1.234"-20 | Steel | 3242A11 | 000000 | ||
| 1" | 1" | 0.437" | 0.0005" | 1 1/4" | 4 1/2" | 1.234"-20 | Steel | 3242A14 | 00000 | ||
| 1" | 2" | 0.437" | 0.0005" | 1 1/4" | 5 1/2" | 1.234"-20 | Steel | 3242A15 | 000000 | ||
| 1 1/2" | 1" | 0.75" | 0.0005" | 1 1/4" | 4 1/2" | 1.234"-20 | Steel | 3242A17 | 00000 | ||
| 1 1/2" | 1 1/2" | 0.75" | 0.0005" | 1 1/4" | 5" | 1.234"-20 | Steel | 3242A18 | 000000 | ||
| 2" | 1" | 0.75" | 0.0005" | 1 1/4" | 4 1/2" | 1.234"-20 | Steel | 3242A23 | 000000 | ||
| 2" | 1 1/2" | 0.75" | 0.0005" | 1 1/4" | 5" | 1.234"-20 | Steel | 3242A24 | 000000 | ||
| 2 1/2" | 2 1/2" | 0.75" | 0.0005" | 1 1/4" | 6" | 1.234"-20 | Steel | 3242A32 | 000000 | ||
Expanding-End Lathe Mandrel Sets
 |
An expanding screw widens the end of the mandrel for a tight hold on the inside of a workpiece. These mandrels are machinable to fit the exact ID of your part. Mandrels are also known as arbors.
No. of Pieces | Includes | End Expansion | Material | Each | ||
|---|---|---|---|---|---|---|
| 8 | Five Hex Keys One 1 1/4" OD × 1" Shank Dia × 4" Lg. Expanding-End Mandrel One 1" OD × 1" Shank Dia × 4" Lg. Expanding-End Mandrel One 1/2" OD × 1/2" Shank Dia × 3" Lg. Expanding-End Mandrel One 1/4" OD × 1/4" Shank Dia × 3" Lg. Expanding-End Mandrel One 3/4" OD × 3/4" Shank Dia × 4" Lg. Expanding-End Mandrel One 3/8" OD × 3/8" Shank Dia × 3" Lg. Expanding-End Mandrel One 5/8" OD × 5/8" Shank Dia × 3" Lg. Expanding-End Mandrel One 7/8" OD × 7/8" Shank Dia × 4" Lg. Expanding-End Mandrel Stand | 0.002" | Steel | 2779A19 | 0000000 |
