Recommended flow
20-53 GPM
Overall length
45.9"
Model
20DDT
Guaranteed Fit
Fast Shipping
Hassle-Free Returns
Description
Made in USA
5-yr warranty
Overview
This Digga excavator auger drive is the smallest of three two-speed models on the 100mm square shaft, serving 18–30 tonne machines and shares its augers, extensions and mounts with the 25DDT and 30DDT. The square shaft is the dividing line in the range — it takes RC10, RC11 and DR11 augers and XO40/XT40 extensions, none of which interchange with anything on a hex shaft. This is piling and large-diameter drilling work.
Key Features of the 20DDT 2 Speed High Flow Auger Drive
- 20,270 ft-lbs of torque — the figure Digga publishes for the 20DDT
- 20-53 GPM recommended flow — match this against your carrier’s auxiliary circuit
- TRU-CUT – a 12†auger cuts a 12†hole, no more oversized holes!
- Over 40 years of auger design and manufacture has resulted in an extremely efficient cutting head design and optimum flight pitches to provide maximum soil removal in all ground conditions.
- Made in the USA
- Easy knock in and out teeth requires no special tools
- Fitted with ECV (Energy Control Valve) to prevent rapid ENERGY CONTROL VALVE decompression of oil, caused by the reverse energy created by pile kick-back.
- Fitted with high efficiency Eaton VIS motor
- Integrated PRV (Pressure Relief Valve)
Why This Drive Suits Its Machine Class
- The square shaft transmits torque without the rounding-out that limits hex at this level.
- The high-speed range is most valuable on large augers, and large augers are what this class of machine drills.
- Shares everything but torque with the 25DDT and 30DDT — pick by the flow your excavator supplies.
- DR11 dedicated rock augers available, with the shift to drop into high torque when the bit finds rock.
20DDT 2 Speed High Flow Auger Drive Specifications
| Specification | Value |
|---|---|
| Model | 20DDT |
| Max torque @ 3,500 PSI | 20,270 ft-lbs |
| Recommended flow | 20-53 GPM |
| Max pressure — do not exceed | 3500psi @ 39gpm |
| Max flow — do not exceed | 53gpm @ 2600psi |
| Max horsepower | 80 HP |
| Pressure relief valve | Included |
| Recommended auger bits | RC10 / RC11 |
| Max auger diameter — earth | 72" |
| Max auger diameter — clay/shale | 60" |
| Weight | 670 lbs |
| Overall length | 45.9" |
| Diameter | 14" |
| Carrier weight range | 18-30T (39,700-66,100 lbs) |
Every figure above is taken from Digga’s published data sheet for the 20DDT. Add your machine make and model at checkout and we confirm the fit before the order ships.
Which Machines Fit the 20DDT?
For 18–30 tonne excavators with a 100mm linkage and a case drain return line:
| Fitment factor | Requirement |
|---|---|
| Mount | Excavator pin mount and linkage, sold separately, chosen by pin diameter |
| Case drain | Required — hose supplied with the drive |
| Electrical | 12V for the shift solenoid via the supplied 10 ft powerlead |
| Hoses | Sold separately |
| Auger bits | Sold separately |
Order online — enter your machine make and model with the order and we confirm the mount fits before it ships, coming back to you only if something needs changing. Questions first are welcome at support@eskidsteer.com or on the chat button on your screen.
20DDT 2 Speed High Flow Auger Drive Questions, Answered
When do I use high speed versus high torque on the 20DDT?
Low speed and high torque for large-diameter augers and hard fracturable rock, where turning force matters more than rotation. High speed and low torque for smaller diameters and softer soils — and for spinning spoil clear of a large auger on lift-out, which is where most of the time saving actually shows up across a day.
Does this drive require a case drain?
Yes. A two-speed drive shifts a hydraulically actuated motor and leaks internal case pressure by design. Without a dedicated low-pressure return to tank, that pressure builds against the motor shaft seal and blows it. Digga supplies the case drain hose with the drive; your machine needs the return line available.
Is the two-speed controller included?
No. The drive ships fitted with a 10-foot powerlead and two-pin connector, and controller kits are separate. Digga offers plug-and-play kits with a rocker switch and cigarette lighter lead in 10, 20, 40 and 50 foot harness lengths, plus joystick-mounted toggle and floor-mounted foot switch options.
What auger bits fit the 100mm square shaft?
Digga RC10 and RC11 rock/earth combination augers and the DR11 dedicated rock auger. Hex-shaft bits do not fit, and extensions must be XO40 or XT40 rather than XO25 or XO30.
What warranty applies to the 20DDT?
Five years on the gearbox and three years on the motor for drilling use, plus a lifetime shaft pull-out warranty, subject to maintenance per the operator’s manual. Digga treats anchoring separately: drives used for anchoring above 12,000 ft-lbs without an Energy Control Valve carry no warranty.
What hydraulic flow does it need?
This one is rated for 20-53 GPM. Check that figure against your machine’s auxiliary hydraulic output before choosing — a machine that cannot supply the rated flow will never reach the rated performance, and one that exceeds the limit will run the attachment hot.
Will this fit my machine?
Check three things: it is built for 18-30T (39,700-66,100 lbs); the interface is Excavator pin mount and linkage, sold separately, chosen by pin diameter; and it needs 20-53 GPM. Add your machine make and model at checkout and we confirm the fit before the order ships.
How is shipping calculated?
Shipping is calculated at checkout — add the item to your cart, enter your delivery address, and the shipping charge is shown before you complete your order. Lift gate service is available for residential deliveries and can be selected at checkout.
How do I order?
Add the item to your cart and check out online — the order page asks for your machine make and model, so there is no need to call ahead. We check the mount against your machine after the order and come back to you if anything needs changing. If you would rather ask first, email support@eskidsteer.com or use the chat button on your screen.
What to Order Alongside the 20DDT
- Mount and linkage — the 20DDT ships without one, so the interface is chosen to match your carrier rather than a generic plate.
- Hydraulic hoses and flush-face quick disconnects — sized to the 20DDT’s 20-53 GPM flow rather than to whatever is on the shelf.
- XO20 auger extensions — cheaper than buying a longer bit for the occasional deep hole on the 20DDT, and they stack.
Contractors reach this page searching for a 2 speed auger drive, for a excavator auger, or specifically for a 20ddt auger drive. The 20DDT also comes up when people are comparing an auger drive against a high flow auger drive, since Digga builds both on shared mounts and shared auger families. Whichever term brought you here, the 20DDT and every other digga auger drive in the range is made in Dyersville, Iowa.
Shipping
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Shipping fee:
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Address: 30 North Gould St Suite R, Sheridan, WY 82801, USA
Returns
Returns
We offer returns and exchanges in limited circumstances as follows:
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- it must be in the same condition you received it in. You will be required to send us timestamped photos of the condition of your items as a condition to determine your eligibility for the return or exchange; and
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We do not accept returns for products that were listed as final sale items at the time of purchase.
You agree to pay a 25% restocking fee on all returns, which we will deduct from any refund owing to you.
After the above referenced 30-day period, unfortunately we cannot offer you a refund or exchange, under any circumstances.
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