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Sierra PTO Post Hole Borer - Compact Tractor (No Auger)

Sierra

$1,350.00 NZD inc GST

$1,173.93 NZD exc GST

Overview

The Sierra PTO Post Hole Borer for Compact Tractors is a 3-point linkage drilling attachment suited to 18–40 HP compact and sub-compact tractors. Designed for digging post holes and planting trees on lifestyle blocks, farms, nurseries, and landscaping sites. Lighter frame and smaller dimensions maximise lifting capacity on smaller tractors. Auger sold separately.

📖 Buying Guide: How to Choose a PTO Post Hole Borer for Your Tractor

Features & Benefits

  • Unique one-piece 100mm x 50mm RHS frame with durable powder-coat finish
  • PTO shaft with shear bolt protection — protects tractor driveline from unexpected obstacles
  • 30 HP gearbox with PTO safety cover
  • Standard 2" (50mm) output shaft compatible with most auger manufacturers
  • CAT 1 (19mm) top linkage connection suits compact tractors
  • Replaceable hard steel cutting tips on Sierra augers — most common replaceable tip standard available
  • Lighter frame and compact dimensions optimised for sub-compact and compact tractor lift capacity

Specifications

Specification Value
Tractor HP Range 18–40 HP compact tractors
Top Link CAT 1 (19mm)
Lower Linkage CAT 1 lower linkage holes
Frame Size 100mm x 50mm RHS
Frame Material Reinforced steel with powder-coat finish
PTO Shaft Series 4 with shear bolt yoke
Gearbox Rating 30 HP with PTO safety cover
Output Shaft 2" (50mm) diameter

Best For

  • Digging post holes for fencing on lifestyle blocks and small farms
  • Planting trees and shrubs in nursery and landscaping applications
  • Compact and sub-compact tractor operators needing a lightweight borer
  • General hole boring on sites where a hand held borer is too much work.

Compatibility

  • Tractor HP Range: 18–40 HP compact tractors
  • Top Link: CAT 1 (19mm pin)
  • Lower Linkage: CAT 1 lower linkage holes
  • Output Shaft: 2" (50mm) — fits most industry-standard augers

What's Included

  • 1 x Sierra PTO Post Hole Borer (compact tractor model)
  • 30 HP gearbox with PTO safety cover
  • PTO shaft with shear bolt yoke
  • Auger sold separately

Warranty & Support

Covered by manufacturer's 12-month warranty. Contact us for warranty terms and support.

Shipping & Freight

Freight calculated at checkout based on delivery location. Contact us if you require a freight quote prior to purchase.

PTO Post Hole Borers — Common Questions

What auger size do I need for fence posts?

For standard timber fence posts, a 6" to 9" auger is typical; for strainer posts or larger assemblies, 12" and up. Check your council or regional requirements too, as some areas specify minimum hole diameters for strainers.

Does the auger come with the borer, or is it separate?

On most of our post hole borer listings the auger is sold separately, so you can choose the exact diameter you need — check the individual product page, as this varies by model.

What PTO speed does a post hole borer need?

Post hole borers are gearbox-driven and typically rated for 540 RPM PTO input — check the product listing to confirm, and never run one above its rated speed, as it puts excessive load on the gearbox and auger.

Is a hydraulic down-force borer worth it over a standard one?

A hydraulic down-force borer pushes the auger into the ground under power rather than relying on the tractor's three-point linkage to push down, which makes a real difference in hard, dry or rocky ground. For soft or well-worked soil, a standard borer is usually enough.

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