| Model |
National 1320 UE (or variant) |
| Rated Power |
2,000 HP (as part of rig) |
| Drum / Line |
1-3/8″ to 1-1/2″ Lebus-grooved drum (grooving for wire line) |
| Traction Motors |
Two GE-752 DC traction motors (≈1,000 HP each) |
| Brake |
Baylor Elmagco Model 7838 electric / auxiliary brake |
| Clutch / Overrunning Clutch |
Included in design in many rebuilds / refurbishments |
| Maximum Hoist / Hookload (via entire rig) |
For rigs using 1320 UE, hoist capacity up to 940,000 lb (≈ 470 tons) is cited in one spec sheet. |
| Drum Speed / Cable Speed |
Not always published; in general such drawworks are designed for controlled speed for cable handling |
| Weight / Dimensions |
For a “1320 M” variant, dimensions ~ 8′W × 7′H × 30′L (in two loads), weight ~ 60,000 lbs |
| Grooving |
Lebus grooving (e.g. 1-1/4″ or 1-3/8″) |
| Auxiliary / Catheads |
Typically includes catheads for makeup / breakout operations |
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