What is the Interpump GEARBOX RS500 used for?

The Interpump GEARBOX RS500 is a dedicated gearbox accessory designed for the WS251 R US pump series. It couples engine drives to pump shafts with a 2.2:1 transmission ratio, enabling efficient power transfer in industrial high-pressure cleaning and fluid transfer applications across Singapore and Southeast Asia.

What are the specifications of the Interpump GEARBOX RS500?

The RS500 features a 1-inch engine shaft input (25.4 mm), SAE J609-A-B engine flange compatibility, 2.2:1 transmission ratio, 25 HP (18.5 kW) maximum power rating, and weighs 4.2 kg without oil. It is compatible with Interpump WS251 pump models.

Where can I buy the Interpump GEARBOX RS500 in Singapore?

3G Electric stocks the Interpump GEARBOX RS500 (SKU ZONDA5-080) in Singapore at our Woodlands warehouse. We offer same-day dispatch for in-stock orders and local delivery across Singapore, plus regional shipment to Malaysia, Thailand, and other SE Asia locations.

How do I select the correct gearbox for my Interpump pump?

Verify your pump model against the RS500 compatibility list—it is engineered exclusively for WS251 R US pumps. Confirm your engine shaft diameter matches 1 inch (25.4 mm) and your engine flange is SAE J609-A-B. Contact 3G Electric's technical team in Singapore for pump cross-reference if unsure.

Interpump GEARBOX RS500 - D. 1" FOR PUMP WS251 R US - Accessories & Installation

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Interpump GEARBOX RS500 - D. 1" FOR PUMP WS251 R US

Interpump GEARBOX RS500 is a compact transmission accessory engineered for high-pressure pump integration, delivering 18.5 kW maximum power transmission with a 2.2 transmission ratio and 1-inch engine shaft diameter…

SKU 3G-ITP-00026

Also listed as: ZONDA5080 · ZONDA5 080

Brand

Interpump

Item

GEARBOX RS500 - D. 1" FOR PUMP WS251 R US

Technical Specifications

Interpump

for pumps

47

engine flange

SAE J609-A-B 

engine shaft in

1

engine shaft mm

25.4 

transmission ratio i

2.2

weight without oil kg

4.2

max power transmission hp

25

max power transmission kw

18.5 

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Interpump Products

3G Electric (S) Pte. Ltd. — Singapore

Product Description

Used in

Common applications for Interpump

Shipyard hull cleaning and surface prep — HT100 and W951 paired with dual-lance guns for dockyard service

Petrochemical heat-exchanger descaling — WS-series stainless pumps for neutral-pH cleaning chemistry

Outdoor HVAC condenser mist cooling — ZP180 pumps on rooftop chiller decks

Textile fibre-finishing — W170 and W270 for mist-jet application across drying lines

Municipal water treatment — W951 motor pumps for high-pressure disinfection chemical injection

Interpump Products

3G Electric supplies Interpump accessories & installation. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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