About this product
Overview
With the 20DDS excavator auger attachment Digga moves to the 100mm square shaft: 19,451 ft-lbs at 3,500 PSI, 72 inches in earth, and the rock and combination bits that go with a machine of 40,000 lbs and up. It is sold here as a complete excavator auger attachment: the 20DDS drive, the mount for your machine's pin size, and the 100mm linkage if you need one. Drive Only is the first choice on this page for anyone who already has the mount and linkage on the boom.
Key Features of the Digga 20DDS Auger Drive
- Max torque 19,451 ft-lbs at 3,500 PSI, as published by Digga for the 20DDS
- Recommended flow 26-60 GPM — 26 GPM is the floor for rated torque
- 100mm Square output shaft, taking RC10 rock and earth combo bits, RC11 heavy duty combo bits and DR11 rock augers
- Drills to 72" in earth and 60" in clay or shale, subject to ground conditions
- Digga-specified motor with an integrated pressure relief valve — no bulky external valve block and fewer joints to leak
- Rated to 67 HP; do not exceed 3,500 psi at 33 gpm or 61 gpm at 1,900 psi
- The gearbox goes down the hole, so drilling depth is not lost to drive height
- HALO Alignment Kit optional — a ring of red and green lights in the drive hood that shows the operator when the auger is plumb
- 2-piece shaft design carries side load without putting it through the bearings
- 5 year gearbox and 3 year motor warranty for drilling use, plus lifetime shaft pull-out cover
Digga 20DDS Specifications
Figures as published by Digga for the 20DDS. Maximum drilling diameter depends on ground conditions and is a guide rather than a rating.
Choosing the Mount for Your 20DDS
The 20DDS carries five mount options plus Drive Only. Pick by the pin size on your excavator's dipper, then by whether you want the drive to hang free or be held at an angle:
A single pin lets the drive hang and find vertical on its own, which is what you want for plumb holes. Two pins fix it to the dipper so the boom controls the angle, which is what you want for angled holes and slopes. Pin diameter is confirmed against your machine make and model before the package ships.
Which Linkage Do You Need?
Digga sets linkage size by the drive, not the machine: the 100mm linkage (HI-004242K) is the one the 20DDS takes. Choose No Linkage - I already have one if the boom already has one, or Include 100mm Linkage - required if you do not have one to have it supplied. The 75mm and 130mm sizes belong to smaller drives and the SD range; all three are listed under Auger Drive Mount Linkages.
Cradle Hitch and HALO Alignment Kit
- No Options — drive and mount as selected.
- Cradle Hitch — the drive is carried in a cradle rather than swinging on the pin, steadying it while collaring and while tracking between holes.
- HALO Alignment Kit — the 20DDS supplied with HALO built into the hood at the factory, reading plumb to ±0.25 degrees per Digga. Not a bolt-on; the retrofit version is a separate HALO Retrofit Kit.
- Cradle Hitch + HALO Alignment Kit — both together.
What Comes in the 20DDS Package
- Digga 20DDS auger drive
- Excavator mount in the pin size you select, unless you choose Drive Only
- 100mm linkage where the linkage option is selected
- Cradle hitch and HALO where selected
- Not included: auger bits, hydraulic hoses and quick disconnects
Where the 20DDS Sits in Digga's Range
Against the 16DDS below it, the 20DDS adds 41 percent more turning force and moves from a 3" Hex shaft to a 100mm Square, and from the 13 - 16T class to 18 - 30T. The 25DDS above it is another 26 percent up, on the same 72" earth ceiling. The 20DDT is the two-speed version of the same size: 20,270 ft-lbs, which shifts between torque and speed while drilling and needs a case drain return.
Which Machines Fit the 20DDS?
Digga builds the 20DDS for excavators of 18 - 30T, roughly 39,700 - 66,100 lbs. Within that class, fitment comes down to hydraulic flow and the pin size on your dipper:
Everything needed to confirm fitment is on this page — add the 20DDS package to your cart to see delivered pricing for your address. Enter your machine make and model with the order and we check the mount and pin size before it ships.
Drilling or anchoring? The 5 year gearbox and 3 year motor warranty covers drilling. Used for screw anchoring without Digga's Energy Control Valve, this drive carries no warranty at all, because it makes more than 12,000 ft-lbs. The ECV is specified with the drive, not added later — tell us before ordering if anchoring is the job.
Digga 20DDS Auger Package Questions, Answered
Do I need the linkage with my 20DDS?
Only if your machine does not already have one. The linkage is the pinned connector between the drive and the mount, and Digga specifies the 100mm HI-004242K for 9K through 30K drives. If you are moving a mount over from another drive, check its linkage size first — a 75mm linkage from a 1DSS through 7DDT drive will not fit the 20DDS.
Single pin or two pin?
A single pin lets the drive hang and find vertical on its own, which suits plumb holes on reasonably level ground. Two pins fix the drive to the dipper so the boom sets the angle, which suits angled holes, work across a slope, and holding the drive steady while it collars. Match the pin range to the pins on your dipper.
What auger bits fit the 20DDS?
The 20DDS runs a 100mm Square output shaft, so it takes RC10 rock and earth combo bits, RC11 heavy duty combo bits and DR11 rock augers. Digga's published ceiling for this drive is 72" in earth and 60" in clay or shale, though ground conditions decide what is sensible on the day.
Is the 20DDS a two-speed drive?
No, it is single speed. Digga's two-speed drives in this class shift between a high-torque and a high-speed range while drilling, need a case drain return, and cost considerably more. Single speed suits most drilling; the shift earns its keep on large diameters where clearing spoil takes the time.
What is the Cradle Hitch for?
It carries the drive in a cradle instead of letting it swing on the pin. That steadies the drive while it collars a hole and while the machine tracks between holes, and it is the usual choice for production drilling where the drive is picked up and set down all day.
Is the HALO Alignment Kit a bolt-on?
No, despite the name. Choosing it supplies the drive with HALO built into the hood at the factory, with the extension cable and in-cab 12V plug. The lights sit on the drive next to the hole, so the operator corrects from the seat instead of taking direction from someone standing beside the auger.
Can I use this drive for helical piles or screw anchors?
Mechanically yes, but read the warranty note above first. Digga requires its Energy Control Valve for anchoring work, because the valve protects the motor from pile kickback, and the ECV must be specified with the drive rather than fitted afterwards.
How is shipping calculated?
Shipping is calculated at checkout from the weight of your order and your delivery address, and the charge is shown before you complete the order. These drives ship by LTL freight on a pallet.
On delivery: inspect the crate before you sign. Note any damage on the bill of lading at the time of delivery, photograph it, and email support@eskidsteer.com — a clean signature makes a carrier claim much harder to win.
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