Worm Gearbox Products | Aluminium, Cast Iron & Stainless Steel | Ever-power Australia
Worm gearbox product range Ever-power Australia
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Worm Gearbox Product Range

Aluminium, cast iron and stainless steel worm gear reducers — engineered for Australian industry with full technical documentation and English-language support.

Product Range

Choose Your Series

We supply worm gearboxes across three distinct material series — each engineered for specific application requirements. Browse by series below, or visit our technical support team if you need selection guidance.

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Aluminium NMRV NRV worm gearbox series NMRV / NRV
Aluminium Series

Aluminium Worm Gearbox

Lightweight die-cast aluminium housing with excellent heat dissipation. Ideal for packaging automation, conveyor systems and general-purpose light-industrial machinery. Available in NMRV, NRV, NMRV-E and NRV-E configurations.

Size 025–150 Ratio 5:1–100:1 Up to 15 kW
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Cast iron WP WPW WPE worm gearbox series WP / WPW / WPE
Cast Iron Series

Cast Iron Worm Gearbox

Heavy-duty cast iron housing for shock-load applications, continuous duty and outdoor installations. Single-stage WP/WPW series and double-stage WPE series for extreme reduction ratios — standard for mining, agriculture and material handling.

Size 40–250 Ratio 5:1–3600:1 Single & Double Stage
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Stainless steel SS304 SSRV SSVF SSGM worm gearbox SSRV / SSVF / SSGM
Stainless Steel Series

Stainless Steel Worm Gearbox

Precision-cast SS304 housing with electrolytic polish for food-grade, pharmaceutical and marine environments. SSRV is dimensionally compatible with NMRV — a direct drop-in upgrade. SSGM offers six-face machined construction for the highest hygiene standard.

Size 30–90 SS304 Throughout CIP Compatible
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Which Series Is Right for Your Application?

The correct series is determined by load, environment and hygiene requirements. Use the table below as a quick reference — or contact our engineers for application-specific advice.

Criteria Aluminium NMRV / NRV Cast Iron WP / WPW / WPE Stainless Steel SSRV / SSVF / SSGM
Housing Material Die-cast aluminium Cast iron SS304 precision cast
Weight Lightest Heaviest Medium
Max Output Torque Up to approx. 800 Nm Up to 2745 Nm Up to approx. 800 Nm
Reduction Ratio Range 5:1 – 100:1 5:1 – 3600:1 5:1 – 100:1
Shock Load Resistance Moderate Superior Moderate
Corrosion Resistance Good (indoor) Good (painted) Excellent
Food-Grade Compliant — — ✓
CIP Washdown — — ✓
Typical Industries Packaging, automation, textiles Mining, agriculture, heavy industry Food, pharma, marine
Aluminium Series

Aluminium Worm Gearbox — NMRV / NRV

Die-cast aluminium housing, 12-2 tin bronze worm wheel, hardened steel worm shaft. Sizes 025 to 150, reduction ratios 5:1 to 100:1. Four configurations: NMRV (hollow input, flanged), NRV (solid input, no flange), NMRV-E and NRV-E (with coaxial worm tail output). Compatible with IEC motor frames via selectable flange codes. Suitable for continuous duty in indoor and protected environments up to IP54.

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Lightweight Construction

Die-cast aluminium alloy housing — significantly lighter than cast iron equivalents, reducing equipment weight and simplifying installation.

Multi-Directional Mounting

All-position installation — horizontal, vertical and inclined. Six standard IEC flange codes cover the full range of motor frame sizes from 56 to 160.

Servo & Stepper Compatible

NMRV-E and NRV-E configurations accept servo and stepper motor inputs from major brands including Panasonic, Mitsubishi and Leadshine.

Optional Output Accessories

DZ single-direction output shaft, SZ dual-direction output shaft, F low output flange and FL high output flange — all available as factory-fitted options.

Cast Iron Series

Cast Iron Worm Gearbox — WP / WPW / WPE

Cast iron housing for heavy-duty, continuous-duty and outdoor applications. WP and WPW single-stage series cover sizes 40 to 250 with ratios from 5:1 to 60:1 and output torques up to 2745 Nm. WPE double-stage series achieves ratios from 100:1 to 3600:1 in a single housing — eliminating the need to chain two gearboxes. Extensive shaft direction options (A, S, O, X, T, V), IEC motor flanges (D suffix) and hollow-shaft outputs (K suffix) available across all sub-series.

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Superior Rigidity

Cast iron provides excellent vibration damping and structural stiffness under high overhung shaft loads — critical for mining conveyors and heavy agricultural equipment.

Self-Locking at High Ratios

At ratios above approximately 25:1, the worm mesh becomes self-locking — preventing back-drive from the load without a separate brake. Essential for inclined conveyors and valve actuators.

Double-Stage up to 3600:1

WPE series delivers ratios from 100:1 to 3600:1 in one compact housing. Ideal for agitators, solar trackers and low-speed industrial drives where single-stage ratios are insufficient.

Universal Mount Options

WPW universal series supports installation from any of six faces. Combined with solid-shaft, hollow-shaft and flange-mount input/output options, virtually any installation geometry is achievable.

Stainless Steel Series

Stainless Steel Worm Gearbox — SSRV / SSVF / SSGM

Three distinct stainless steel sub-series for hygiene-critical and corrosive environments. SSRV uses SS304 precision-cast housing with NMRV-identical dimensions — a direct drop-in replacement that adds corrosion resistance and CIP washdown compatibility without machine modification. SSVF provides a compact VF-style right-angle form factor. SSGM delivers the highest hygiene standard with six-face fully machined SS304 housing, 12-2 tin bronze worm wheel and full synthetic worm gear oil as standard. All series feature electrolytic surface polish.

Series Detail Page
SSRV: Direct NMRV Replacement

Identical mounting dimensions to NMRV — swap in a stainless unit without redesigning your machine. Suitable for immediate food-grade upgrades on existing production lines.

SSGM: Six-Face Machined

All six housing faces are fully machined — eliminating rough casting surfaces where bacteria and residue can accumulate. Meets the most stringent Australian food processing and FSANZ hygiene standards.

Electrolytic Polish Finish

Electrolytically polished SS304 surface reduces surface roughness to below 0.8 Ra — allowing fast, thorough CIP cleaning without residue retention between production runs.

Food-Grade Lubricant Standard

All stainless series units are supplied with full synthetic worm gear oil approved for incidental food contact. SSVF and SSGM use synthetic oil as standard across the operating temperature range.

Need Help Selecting the Right Gearbox?

Send us your application requirements — input power, required ratio, mounting configuration and duty cycle — and our engineering team will recommend the correct model and provide a quotation in English within 24 hours.

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