PC helical pre-stage?

PC071 to 293.8:1, PC080 to 150:1.

For heavier loads or 35 mm bore couplings.

Check service factor above 1.0.

Best EP-NMRV075 Aluminium Worm Reducer Australia Manufacturers, suppliers, factory

Name: Best EP-NMRV075 Aluminium Worm Reducer Australia Manufacturers, suppliers, factory - Worm Reducers
SKU: 33532c4c3930

Descripción

EP-NMRV075 Heavy Medium-Duty Aluminium Worm Reducer

The EP-NMRV075 takes the NMRV aluminium worm reducer series into serious medium-duty territory – delivering up to 233 Nm output torque at input powers up to 3 kW. At 9 kg with 75 mm centre distance, it remains significantly lighter than cast iron equivalents which typically weigh 15-20 kg while handling conveyor head drives, industrial agitator mechanisms, and processing equipment that the smaller NMRV063 cannot cover. The output shaft upgrades to Ø28 mm standard with optional Ø35 mm for heavier shaft loads – matching the shaft standards used in medium-duty Australian industrial drives. IEC motor frames from 56 to 112 connect directly via B5 or B14 flange, accommodating motors from 0.25 kW to 3 kW without adaptor plates. Compatible with PC071 and PC080 helical pre-stages for extended ratio ranges with higher efficiency than equivalent double-worm combinations.

EP-NMRV075 Technical Specifications

Parameter	Value
Model	EP-NMRV075
Centre Distance	75 mm
Weight (without motor)	9 kg
Output Shaft	Ø28 mm h6 (optional Ø35 mm)
Output Keyway	b=8mm, t=31.3mm (38.3 for 35mm)
Ratio Range	7.5, 10, 15, 20, 25, 30, 40, 50, 60, 80, 100
Input Power	0.25 – 3 kW
Housing	Die-cast aluminium alloy
IEC Motor Frames	56/63/71/80/90/100/112 B5 and B14
IP Rating	IP54
Output Flanges	FA, FB
Mounting	B3, B6, B7, B8, V5, V6
Helical Pre-Stages	PC071, PC080

Performance Data at P1 = 0.75 kW (n1 = 1400 rpm)

Ratio	n2 (rpm)	Torque (Nm)	Service Factor	Fr2 (N)
15	93.3	130	1.5	3509
20	70	168	1.3	3862
25	56	205	1.0	4160
30	46.7	233	1.0	4421
40	35	147	1.5	4865
50	28	177	1.2	5241

Performance Data at P1 = 0.55 kW (n1 = 1400 rpm)

Ratio	n2 (rpm)	Torque (Nm)	Service Factor	Fr2 (N)
40	35	108	2.0	4865
50	28	129	1.6	5241
60	23.3	146	1.4	5569
80	17.5	180	1.1	6130
100	14	206	0.9	6603

Helical Pre-Stage Combinations

Combination	Ratio Range	Max Torque
PC071+NMRV075	73.4 – 293.8:1	332 Nm
PC080+NMRV075	75 – 150:1	332 Nm
NMRV040/075	2400 – 5000:1	498 Nm

✓ Core Features and Benefits

⚒ 233 Nm – Serious Medium-Duty Capacity
Handles loaded conveyor drives, industrial agitators, and processing equipment that smaller NMRV frames cannot. The first NMRV size operating at genuine medium-industrial torque levels.

⚙ IEC Frames 56 to 112 – Full Motor Range
Accepts motors from 0.25 kW to 3 kW directly via B5 or B14 flange. Frame 100 and 112 support opens the NMRV075 to medium-industrial applications previously requiring cast iron reducers.

❄ 9 kg vs 15-20 kg Cast Iron Equivalent
45-55% lighter than comparable cast iron. Still practical for field installation by one or two workers on mining and construction sites without overhead lifting equipment.

⚖ Helical Pre-Stage Compatible – PC071 and PC080
PC071 and PC080 helical pre-stages extend the ratio range to 293.8:1 – achieving higher transmission efficiency than double-worm combinations at comparable ratios. Standard for demanding continuous-duty applications.

⚙ Industry Applications

⚊ Mining Conveyor Head Drives
Head and tail drives for medium-duty ore, coal, and aggregate belt conveyors. 233 Nm handles loaded belt tension at moderate speeds. 9 kg enables underground installation without overhead crane.

☵ Industrial Agitator Drives
Mixing vessel drives for chemical processing, water treatment, and food production. Ø28 or Ø35 output shaft matches standard agitator shaft couplings directly.

⚙ Heavy Automation Equipment
Palletiser main drives, heavy-duty indexing tables, and robotic cell conveyor drives exceeding NMRV063 torque capacity. FA and FB flanges for direct machine mounting.

⚒ Pump and Compressor Drives
Low-speed drives for dosing pumps, small compressors, and ventilation blower mechanisms requiring up to 3 kW input power.

⚙ Selection Guide and Mounting Positions

Select the NMRV075 when your application requires output torque between 130 Nm and 233 Nm at input power up to 3 kW. Step up to the NMRV090 at 302 Nm for heavier loads. The NMRV063 at 167 Nm is more cost-effective for lighter applications or where 5 output flange options are needed.

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 mounting chart

⚖ Aluminium vs Cast Iron – Heavy-Duty Comparison

At the 75 mm size class, the weight difference between aluminium and cast iron becomes increasingly significant for installation logistics. The NMRV075 at 9 kg can be handled by one or two workers; the cast iron equivalent at 15-20 kg may require mechanical lifting assistance.

Feature	Aluminium NMRV	Cast Iron
Weight	30-50% lighter	Heavier
Corrosion	Excellent	Poor
Heat Dissipation	Superior	Moderate
Cost	Lower	Higher
Noise	Low	Moderate
IEC Motor	Direct B5/B14	Adaptor often needed

❓ Frequently Asked Questions

▶ What is the maximum output torque of the EP-NMRV075?

233 Nm at 30:1 ratio with 0.75 kW input. At 100:1 ratio with 3 kW input: 206 Nm at 14 rpm output speed. Verify service factor is adequate for your application shock loading profile.

▶ Why does the NMRV075 support IEC frame 100 and 112?

The larger 75 mm centre distance provides sufficient input flange diameter for IEC 100 and 112 frames. This makes the NMRV075 the first NMRV size suitable for 1.5 kW to 3 kW motor applications.

▶ What are the PC071 and PC080 helical pre-stage options?

Helical gear pre-stages that bolt onto the NMRV075 input flange. PC071 provides ratios 73.4 to 293.8:1. PC080 provides ratios 75 to 150:1. Both offer higher efficiency than double-worm at comparable ratios.

▶ When should I specify the Ø35 mm output shaft?

Choose the 35 mm option when output shaft radial or axial loads exceed the 28 mm shaft rating, or when the driven equipment uses 35 mm bore couplings or sprockets as its standard.

▶ What is the thermal capacity of the EP-NMRV075 at 3 kW?

At 3 kW continuous input, verify the thermal service factor remains above 1.0. For ambient temperatures above 30 degrees C at 3 kW, consider duty cycle reduction or supplementary fan cooling to maintain thermal margin.

★ Customer Reviews

★★★★★

“NMRV075 on our underground conveyor drives. 9 kg means our crew installs without a crane. Running 3 shifts at 200 Nm continuous with zero downtime in 14 months.”

Phil W. – Goldfields Mining Co. (Australia)

★★★★★

“Upgraded our agitator drives from cast iron. NMRV075 at 35 mm output matches our mixing shaft directly. 50% lighter – simplified our vessel mounting frames significantly.”

Martin K. – ChemProcess AG (Germany)

★★★★★

“PC080 pre-stage plus NMRV075 on our palletiser main drives. 150:1 ratio with better efficiency than our previous double-worm setup. Clean compact installation.”

David L. – TransPack Ltd (United Kingdom)

⚙ Related Products and Accessories

⚙ IEC Motors: Frames 56-112, B5 and B14. ⚖ Output Flanges: FA, FB. ⚖ Torque Arms: K1=200mm. ⚙ Covers: N2=74mm. ⚙ Pre-Stages: PC071, PC080 helical units.