B3, B6, B7, B8, V5, V6 - all standard orientations supported.

Torque arm, protective cover, single and double output shaft options.

Best EP-NRV050 Aluminium Worm Gearbox Australia Manufacturers, suppliers, factory

Name: Best EP-NRV050 Aluminium Worm Gearbox Australia Manufacturers, suppliers, factory - Worm Reducers
SKU: f82ae8075ea3

Description

EP-NRV050 Solid Shaft Aluminium Worm Gearbox – Product Overview

The EP-NRV050 is the crossover NRV solid-shaft worm gearbox for medium-duty industrial and water treatment drives, offering 25 mm output and VFD motor compatibility. With a solid Ø14j6 input shaft instead of an IEC motor flange, the NRV050 accepts any motor type via standard shaft coupling – servo motors, stepper motors, DC brushless, hydraulic motors, and even combustion engine PTO drives. This universal motor compatibility is the defining advantage of the NRV series over the IEC-flange-only NMRV series. At approx. 4 kg with 50 mm centre distance and Ø25h6 output shaft, it delivers up to 84 Nm output torque across ratios 5-100:1. The die-cast aluminium alloy housing provides corrosion resistance and thermal efficiency superior to cast iron while saving 30-50% in weight. Purpose-designed for water treatment paddle drives, process conveyors, and medium-duty pump mechanisms where VFD-controlled motors require the solid shaft input that IEC-flange reducers cannot provide.

EP-NRV050 Technical Specifications

Parameter	Value
Model	EP-NRV050
Centre Distance	50 mm
Weight (without motor)	approx. 4 kg
Input Shaft	Ø14j6 (solid)
Output Shaft	Ø25h6
Output Shaft Length B	50 mm
Output G1	92 mm
Output Overall L	153 mm
Output Thread	M10
Output Keyway b1	8 mm
Output Keyway t1	28 mm
Ratio Range	5-100:1
Input Power Range	0.12-0.75 kW
Max Output Torque	84 Nm
Housing Material	Die-cast aluminium alloy, painted finish
Worm Wheel	Tin-bronze alloy
Worm Shaft	Case-hardened steel, precision ground
Lubrication	Synthetic oil, lifetime fill
IP Rating	IP54
Mounting Positions	B3, B6, B7, B8, V5, V6

NRV050 Performance Data (n1 = 1400 rpm)

Ratio	n2 (rpm)	Torque (Nm)	Input (kW)
5	280	62	2.0
10	140	72	1.2
20	70	73	0.7
30	46.7	84	0.6
50	28	73	0.3
80	17.5	65	0.2
100	14	55	0.2

✓ Core Features and Benefits

⚙ Solid Input Shaft – Universal Motor Coupling
Unlike the IEC-flange NMRV series, the NRV solid input shaft couples to ANY motor type via standard shaft couplings – AC induction, DC brushless, servo, stepper, hydraulic, pneumatic, and combustion engine PTO drives.

⚖ 14 mm j6 Input – VFD Motor Compatible
Solid input shaft couples to VFD-controlled motors for variable-speed process applications. The NRV050 is the standard choice when process speed control requires a motor type that does not have an IEC flange.

❄ 25 mm h6 Output – Australian Medium-Duty Standard
Matches standard Australian coupling and sprocket bore sizes for medium-duty industrial drives. Direct fit to conveyor sprockets, pump couplings, and agitator shaft hubs.

⚒ Aluminium Thermal Efficiency and Corrosion Resistance
Die-cast aluminium housing dissipates heat 3x faster than cast iron for continuous duty at up to 40°C ambient. Factory coating resists humidity, washdown chemicals, and mild salt spray exposure.

⚙ Industry Applications

⚒ Water Treatment Drives
Paddle drives, dosing mechanisms, and screw conveyor feeds in municipal and industrial water treatment. Solid shaft couples to VFD-controlled motors for precise speed control of flocculation processes.

⚙ Process Belt Conveyors
Belt and chain conveyor drives requiring 40-84 Nm output torque. 25 mm output matches standard process conveyor sprocket bores without modification.

⚖ Off-Grid and Remote Site Equipment
Solid shaft input couples to diesel-hydraulic motors, engine PTO drives, and battery-powered DC motors – not restricted to mains-powered IEC motors. Essential for mining, agriculture, and construction in remote locations.

⚛ Servo and Stepper Precision Positioning
Direct servo or stepper motor coupling via bellows or beam couplings for position-control applications. Achieves angular accuracy levels that IEC-flange worm reducers cannot match.

⚙ Selection Guide and Mounting Positions

Choose the NRV050 when you need universal motor coupling flexibility – servo, stepper, DC, hydraulic, or PTO. If your application uses only standard IEC AC motors, the NMRV050 with direct flange mount may offer a simpler installation. Both NRV and NMRV share identical output shaft specifications, torque ratings, and housing dimensions at each size.

Position	Code	Oil Note
Horizontal	B3	Standard fill
Inverted	B8	Increased fill
Vertical up	V5	Reduced fill
Vertical down	V6	Maximum fill
Wall-mount L/R	B6/B7	Per chart

⚖ NRV Aluminium vs Cast Iron Worm Gearbox Comparison

The NRV aluminium worm gearbox provides significant weight savings, better corrosion resistance, and superior heat dissipation compared to traditional cast iron reducers – with the added advantage of universal motor coupling via the solid input shaft.

Feature	Aluminium NRV	Cast Iron
Weight	30-50% lighter	Heavier
Corrosion	Excellent	Poor
Heat	Superior	Moderate
Cost	Lower	Higher
Input Shaft	Solid – universal coupling	Often fixed flange
Motor Compatibility	Any motor via coupling	Usually IEC only

❓ Frequently Asked Questions

▶ How does the NRV050 compare to the NMRV050?

Same 50 mm centre distance, 25 mm output, and identical torque ratings. NRV050 has a solid 14 mm input for universal motor coupling including VFD and servo. NMRV050 has an IEC flange for standard AC motors only.

▶ Is the NRV050 compatible with VFD-controlled motors?

Yes – this is a primary advantage. The solid input shaft couples to any VFD-controlled motor via standard coupling, enabling variable-speed process control that fixed-flange IEC reducers cannot easily accommodate.

▶ What is the maximum output torque?

84 Nm at 30:1 ratio with approximately 0.75 kW input. At 100:1 ratio: 55 Nm at 14 rpm. NRV050 shares identical output performance ratings with the NMRV050.

▶ What mounting positions does the EP-NRV050 support?

B3 horizontal, B6 wall-mount left, B7 wall-mount right, B8 inverted, V5 vertical output up, V6 vertical output down. Oil level must be adjusted per mounting position – refer to the NRV mounting position chart in the product manual.

▶ What accessories are available for the EP-NRV050?

Torque arm for shaft-mount hollow bore installations, protective cover for input shaft bore protection, single and double output shaft configurations. All NRV accessories are size-matched to the NRV050 frame dimensions.

★ Customer Reviews

★★★★★

“NRV050 on water treatment paddle drives with VFD motor coupling for precise speed control of our flocculation process. Aluminium handles the damp plant environment.”

Andrew K. – Murray Water Services (Australia)

★★★★★

“8 units on our food processing conveyors coupled to washdown servo motors. Aluminium handles the wet environment without corrosion. 25 mm output fits our sprockets directly.”

Yuki T. – Nippon Food Systems (Japan)

★★★★★

“NRV050 on our dairy conveyor drives. 25 mm output fits existing sprockets. Solid shaft works perfectly with our variable-speed DC motor controllers.”

Hans B. – Alpen Dairy Tech AG (Switzerland)

⚙ Related Products and Accessories

⚙ Compatible Motors: Any motor type via solid shaft coupling – servo, stepper, DC, hydraulic, PTO. ⚖ Torque Arms: Size-matched for shaft-mount installations. ⚙ Output Shafts: Single and double solid output shaft options. ⚖ Protective Covers: Input shaft bore dust protection. ⚙ NMRV050: IEC motor flange version of the same 50 mm frame size.