Udor RH Series Extra Heavy-Duty Reduction Gearbox

The Udor RH Series is an extra heavy-duty reduction gearbox engineered for the most demanding industrial high-pressure applications. Built to pair with Udor’s powerful HXR series plunger pumps, these robust gearboxes handle up to 110 HP (82 kW) of input power, making them the ideal choice for large-scale water blasting, mining wash-down, and heavy industrial cleaning operations. The RH series is available in three gear ratios with standard engine-drive and MI (hydraulic motor input) configurations, giving operators the flexibility to match pump speed precisely to their power source.

Specifications

Series	RH (Extra Heavy-Duty Reduction)
Max Power	110 HP / 82 kW
Engine Shaft	50 mm (1.97″)
Oil Quantity	2.0 L
Compatible Pumps	Udor HXR Series
Configurations	Standard (engine-drive) & MI (hydraulic motor input)

Model Variants

Model	Code	Ratio	Type
RH 115	313200	1.875 : 1	Standard
RH 118	313100	2.238 : 1	Standard
RH 122	313000	2.722 : 1	Standard
RH 115 MI	313500	1.875 : 1	Hydraulic Motor
RH 118 MI	313400	2.238 : 1	Hydraulic Motor
RH 122 MI	313300	2.722 : 1	Hydraulic Motor

Applications

• Large-scale industrial pressure washing and water blasting
• Mining equipment wash-down and dust suppression
• Heavy-duty sewer and drain jetting
• Ship hull cleaning and marine maintenance
• Concrete and surface preparation
• Multi-gun wash systems for fleet and heavy vehicle cleaning
• Oil, gas, and petrochemical plant maintenance

Key Features

• Extra heavy-duty cast housing rated to 110 HP (82 kW)
• Three reduction ratios (1.875, 2.238, 2.722 : 1) for precise pump speed matching
• 50 mm (1.97″) engine shaft accommodates large diesel and petrol engines
• MI variants accept hydraulic motor input for mobile and remote applications
• 2.0-litre oil capacity for sustained high-load operation and cooler running
• Bearing-supported, vented design for extended service life
• Purpose-built to couple with Udor HXR series high-pressure plunger pumps

Technical Documents

• Udor RH Series Gearbox Brochure (PDF)
• All Udor Gearbox Documents

Parts & Service

AES Waterblasters is the sole New Zealand distributor for Udor products and carries genuine spare parts for all RH series gearboxes. Our workshop can service, rebuild, and supply replacement components for every variant. Contact us on 09 271 4782 for parts enquiries, pricing, or technical advice.

Related Models

Other Udor gearbox and pump ranges:

• Udor RBC Series Reduction Gearbox
• Udor HXR Series High-Pressure Plunger Pumps