The auger is the attachment that eliminates the worst manual job on a property. Hand-digging post holes is slow, brutal, and gets slower as the day goes on. A hydraulic auger drills at the same rate at four in the afternoon as it did at eight in the morning.
For fence contractors it's the reason to own a machine at all. For everyone else it's the tool that makes deck footings, tree planting, and sign posts a non-event.
What You'll Use It For
- Fence post holes — residential, agricultural, and commercial
- Deck and pergola footings
- Tree and shrub planting holes
- Mailbox, sign, and light post footings
- Soil sampling and percolation test holes
- Anchor holes for guy wires and tie-downs
- Planting balled and burlapped stock
- Breaking up hardpan in planting beds
How to Spec It
This is where an auger purchase goes right or wrong.
Bit diameter. Match it to your post size and local code. Common fence work runs 6–12 inch bits; deck footings and commercial posts go larger. Larger diameter needs more torque, which means more hydraulic flow — a machine that spins a 6-inch bit easily may stall on an 18-inch bit in clay.
Torque vs. speed. Auger drive units are geared for one or the other. High-torque, low-speed units are what you want for hard soil and large diameters. Higher-speed units drill faster in easy ground. Most contractors are better served by torque.
Planetary drive. Planetary gear reduction is the standard for serious use — more torque, better durability under load than chain or direct-drive alternatives.
Depth and extensions. Standard bit length determines base depth; extensions get you deeper. Frost depth requirements in cold climates often drive this decision more than anything else.
Drive connection. Round or hex output shaft, and the size matters for bit interchangeability. Check before buying bits from a different source than the drive unit.
Flow requirement. Every drive unit has a minimum and maximum flow. Under-feed it and you get stalling and heat. Over-feed it and you can damage the motor.
Hydraulic HP = (GPM × PSI) ÷ 1,714
Which Models Run It
Augers are hydraulically driven, so flow is the deciding factor rather than lift capacity.
YJ1000, YJ1100, YJ1200 — the 25 hp Kubota diesel models are the standard choice for auger work. Diesel delivers consistent flow under load, which is exactly what a drive unit wants.
YJ2000, YJ3000 — step up for large-diameter bits, consistently hard or rocky soil, or commercial post work. The additional hydraulic capacity is what gets you through ground that stops smaller machines.
Send us the drive unit's spec sheet and we'll confirm the match before you buy.
Trades That Use It Most
Fencing Contractors · Landscaping · Deck & Outdoor Living · Pole Barn & Post-Frame · Farm & Agriculture · Homeowners & Acreage
Auger FAQ
Will it work in rocky soil?
Partly, and honesty matters here. Hydraulic augers handle clay, hardpan, and small stone well. Larger rock and ledge will stop any auger in this size class — that's a limitation of the tool category, not the brand. For consistently rocky ground, spec more hydraulic capacity, use a smaller diameter bit, and expect to break out a rock bar occasionally regardless of what you buy. A rock auger bit with carbide teeth helps but doesn't eliminate the problem.
How deep can it drill?
Base depth depends on bit length; extensions get you deeper. Practically, most mini skid auger setups handle typical frost-depth footing requirements. Confirm the specific configuration against your local code depth.
What happens if the bit binds up?
The machine will try to rotate itself instead of the bit — that's the moment to stop and reverse rather than force it. Binding is usually rock, roots, or too much diameter for the conditions.
Can I use my existing auger?
If the drive unit has a universal mini skid mount, yes. Yellow Jacket machines ship with a universal quick-attach plate as standard equipment. Confirm the flow requirement matches the machine.
Do I need different bits for different soils?
Standard bits handle most dirt. Rock bits with carbide teeth are worth having if you're in stony ground regularly. Tree-planting work sometimes uses a wider, shallower bit profile.
How many holes per day can I expect?
It varies enormously with soil, depth, and diameter, so any number quoted on a website is close to meaningless. What owners consistently report is that hole-digging stops being the bottleneck and the constraint moves to setting and plumbing — which is where you want it.
Get a Quote
Tell us your post size, depth requirement, and soil conditions, and we'll spec the drive unit and bits.
Request pricing · Call (330) 825-2307