An Enerpac W-Series low-profile hydraulic torque wrench is a drive unit fitted with an interchangeable hexagon cassette that slips directly over the nut, so it works where there is no room for a socket. One drive unit runs a whole range of cassette sizes, from 2,040 ft-lb (W2000X) to 35,000 ft-lb (W35000X) at 10,000 psi.
W-Series drive units
| Drive unit (X / PX) | Max torque at 10,000 psi | Hex range with W cassettes |
|---|---|---|
| W2000X / W2000PX | 2,040 ft-lb (2,766 Nm) | 1 1/16 to 2 3/8 in (30 to 60 mm) |
| W4000X / W4000PX | 4,175 ft-lb (5,661 Nm) | 1 5/16 to 3 3/8 in (36 to 85 mm) |
| W8000X / W8000PX | 8,470 ft-lb (11,484 Nm) | 1 7/8 to 4 1/8 in (50 to 105 mm) |
| W15000X / W15000PX | 15,330 ft-lb (20,785 Nm) | 2 7/16 to 4 5/8 in (65 to 115 mm) |
| W22000X / W22000PX | 22,500 ft-lb (30,506 Nm) | 2 15/16 to 5 3/8 in (75 to 135 mm) |
| W35000X / W35000PX | 35,000 ft-lb (47,453 Nm) | 3 1/8 to 6 1/8 in (80 to 155 mm) |
Torque accuracy is ±3% across the full stroke. Data from the Enerpac E415 Bolting Tools catalog.
How to build a W-Series wrench
- Pick the drive unit from the torque you need. For loosening, plan on about 2.5 times the tightening torque.
- Pick a cassette that matches the nut's hex size (across flats). The cassette number starts with the drive unit size: W21.. and W22.. cassettes fit the W2000, W41.. to W43.. fit the W4000, and so on. Imperial and metric cassettes are both available.
- Need a smaller hex? A reducer insert (W....R...) drops a cassette down to a smaller nut, so one cassette covers more sizes.
- Tight space? UltraSlim stepped-width cassettes (W....SL) are narrower and bi-hexagonal, giving twice as many positions on the nut. They use the same drive units.
- Add a pump and hoses. W-Series wrenches run on a 10,000 psi torque wrench pump. See Enerpac torque wrench pumps.
X or PX?
The PX version is the same drive unit fitted with the Pro Series tilt-and-swivel manifold, which makes hose routing and positioning easier. The X costs less and suits jobs where the hose position is not a problem.
W-Series questions
What is a low-profile hydraulic torque wrench drive unit?
It is the power end of a hexagon (cassette) torque wrench: the hydraulic cylinder and ratchet mechanism. On its own it does not turn a nut. It needs a hex cassette sized to the nut.
Do X-Edition cassettes fit older W-Series drive units?
Enerpac states that X-Edition drive units, cassettes and most accessories are compatible with standard edition tools. The TSP300 swivel is the exception and fits X-Edition tools only.
When should I use a square drive wrench instead?
When there is room for an impact socket. A square drive S- or DSX-Series wrench takes standard impact sockets instead of dedicated cassettes. Compare them on hydraulic torque wrenches.
![W4105X W4000X Hex Cassette, 33mm [1-5/16"]](http://buyenerpac.com/cdn/shop/files/W2113X_XED_9912_2000__44911.1622239521.1280.1280.jpg?v=1783428866&width=360)
