Overview

The Sierra PTO Post Hole Borer with Hydraulic Downforce is a tractor-mounted drilling attachment designed for digging post holes, planting trees, and general hole boring  earthworks on farms and lifestyle blocks. Built for 30-100 HP tractors (best suited to 30 HP+) with PTO drive and hydraulic downforce for penetrating harder ground. Features shear bolt-protected 50 HP gearbox with 2" (50mm) output shaft compatible with most agricultural auger manufacturers. Reinforced 100mm square steel tube boom with Category 1 and 2 lower linkage holes. Requires one double-acting hydraulic circuit for up/down control. Auger sold separately.

Features & Benefits

• Hydraulic downforce applies pressure for drilling through hard ground and clay
• 50 HP shear bolt-protected gearbox prevents damage from unexpected obstacles
• 2" (50mm) output shaft fits industry-standard augers from multiple manufacturers
• Reinforced 100mm x 100mm square steel tube boom for strength and rigidity
• Category 1 and Category 2 lower linkage holes suit 18-100 HP tractors
• Category 2 (25mm) top link pin required for mounting
• PTO shaft with shear bolt yoke included protects tractor driveline
• Double-acting hydraulic circuit controls up/down movement independently from 3-point linkage
• 130kg weight suitable for compact to large tractors without overloading
• Powder-coated reinforced steel frame resists corrosion
• Compatible with Sierra augers featuring replaceable hardened steel cutting tips

Specifications

Specification	Value
Overall Length	1930mm
Overall Width	850mm
Overall Height	370mm
Weight	130kg
Tractor HP Range	30-100 HP (best suited to 30 HP+)
Top Link	Category 2 (25mm pin required)
Lower Linkage	Category 1 and Category 2 holes
Frame Size	100mm x 100mm square tube
Frame Material	Reinforced steel with powder-coat finish
PTO Shaft	Series 4 with shear bolt yoke (included)
Gearbox Rating	50 HP (shear bolt protected)
Output Shaft	2" (50mm) diameter
Hydraulic Requirement	1 x double-acting circuit
Downforce	Hydraulic

Best For

• Digging post holes for fencing on farms and lifestyle blocks
• Planting trees and shrubs in landscaping and nursery operations
• Installing vineyard and orchard posts
• General earthworks and foundation drilling
• Hard ground and clay soil conditions requiring downforce

Compatibility

• Tractor HP Range: 30-100 HP (best performance with 30 HP+)
• Top Link: Category 2 (25mm pin required)
• Lower Linkage: Category 1 and Category 2 holes (Cat 2 pins supplied)
• PTO: Standard tractor PTO (540 RPM recommended)
• Hydraulic Requirement: 1 x double-acting hydraulic circuit (3-point linkage must be in float position, auxiliary control operates up/down)
• Auger Compatibility: 2" (50mm) output shaft fits most industry-standard augers

What's Included

• 1 x Sierra Post Hole Borer main unit with hydraulic downforce
• 50 HP gearbox with shear bolt protection
• PTO shaft with shear bolt yoke
• Category 2 lower linkage pins
• Hydraulic cylinder and hoses
• Operator's manual

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. Ships fully assembled and ready to mount on your tractor.

Important Notes:

• Auger sold separately - choose auger diameter based on your application
• Category 2 (25mm) top link pin required for mounting (not included)
• 3-point linkage hydraulics must be in float position during operation
• Use auxiliary hydraulic control to operate up/down movement

Video Overview: