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(03) 9210 0400

Post Hole Digger Earth Auger 9 HP HD99SX Groundhog Made in USA

In stock
Special Price $7,849.00 Regular Price $8,041.00
Save 2.39% off

The One-man Hydraulic Post Hole Digger is the most powerful digger in the Groundhog line. The use of hydraulics greatly reduces the need for maintenance, it increase the torque and allows for digging with augers up to 18" in size.

It is designed to put the power of a two-man machine in the hands of one-man. The unique right-angle design minimizes operator fatigue by eliminating torque kick-back to the operator.

  • The heavy duty construction with variable speed forward and reverse auger rotation means that it will dig easily and efficiently. 
  • The low profile and compact design eliminate the need for telescoping booms and axles and allows the unit to be transported in the bed of a small truck. 
  • It comes equipped with a towbar (for on-site use only).


  • Augers lock up for easy manoeuvring
  • Engine frame swivels to keep the engine level
  • Large 5.70 x 8 pneumatic tyres
  • Auger speed of 140 rpm approx. and 200 ft. lbs. of torque
  • Forward and reverse auger rotation
  • 6 G.P.M hydraulic pump @ 3200 engine rpm
  • 11L oil tank capacity
  • Handle bar pivots for drilling on uneven terrain
  • 7/8" square auger drive
  • 9.0 HP Robin EX27 engine
  • Made in the USA


  • Digging post holes
  • Tree Planting


  • Hire Industry
  • Fencing Contractors
  • Shires & Councils
  • Farms
  • Horticulture
Model Number HD99SX
Engine Make Robin Subaru 
Engine 9.0hp EX27D
Engine Features Over Head Cam, with centrifugal clutch
Starting System Recoil Start
Fuel Type Petrol
Fuel Tank (L) 6.1L
Noise Level (dB @ 7m) 70db
Operation Width (mm) Up to 18"
Weight (kg) 135 kg
Manufacturers Warranty 2 years


Optional Extras: Auger is not included but 2" - 18" Augers are available (100 - 460mm) and Honda Powered may be supplied.

Please call us on (03) 9210 0400 for pricing.

More Information
Suit Tractor No
Warranty 2 years
Condition New
Dimension Length (cm) 160
Dimension Width (cm) 100
Dimension Height (cm) 51
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At Best Buys Online, we always strive to offer you the lowest shipping prices possible.

On each product page, we provide an online instant shipping quote with multiple options of shipping to your commercial address (for ex: business, farm, workshop) or your house and with or without tailgate.

To learn about our rates, please try our free instant online shipping calculator and you’ll get an immediate response - a shipping quote that is budget-friendly.


PO BOXES : NO parcels above 22kg and/or longer than 1meter can be sent to a PO Box. Signature is required.

1. Goods are shipped once payment is received in full. We strongly advise all customers that they provide a delivery address where someone is available to sign for the goods during business hours. Sometimes, a forklift will be required to unload at the destination. If customers don’t have means to unload, you may be required to pick it up from a designated courier depot, OR pay an extra fee for the tailgate to unload the item when delivering to your nominated address. Please send us a message or call us (03) 9210 0400 to arrange.

2. All courier companies will attempt delivery of your goods once. If no one is home when delivery is being attempted, a note will be left. A re-delivery will incur extra charges. All second deliveries need to be directly organised with the courier company and paid for before goods are delivered.

3. Once in the hands of the couriers, freight times are outside of our control. However all tracking details are forwarded via email upon dispatch and customers are welcome to contact the relevant freight company, or we are happy to attend to any queries you may have.

4. FREE SHIPPING PROMOTION: This only applies to customers in capital cities. Free Shipping does not apply to regional areas. We can send the item to the nearest freight depot, and we will charge you the difference in freight cost to the capital city and your pick-up location. Please call us on (03) 9210 0400 for further information.
PICK-UP OPTION (No Handling Fee applies)

This option allows you to pick up your order from our Melbourne warehouse at no added cost.

Bookings are essential. Collection available at U5/25 Jersey Rd, Bayswater, Vic 3153.

Once your order has been placed, we will contact to let you know when your order will be available for pickup. (Our operating hours are between 8AM to 5PM Monday to Friday and 9am-3pm on Saturday).