PMRV040 Worm Geared Motor | Compact Aluminum Worm Reducer | Center Distance 40 mm
PMRV040 | Aluminum Worm Gearbox
The PMRV040 worm gearbox balances compact design with robust output capability, offering up to 47 Nm torque through a precision die-cast aluminium housing with multiple flange and shaft configurations.
Precision die-cast aluminium housing | lightweight, strong, and corrosion-resistant.
📈 Product Overview | PMRV040 Worm Geared Motor
The PMRV040 worm geared motor (also: worm gear reducer, right-angle gearbox, speed reducer, worm drive motor) is engineered for reliable torque multiplication, compact installation, and long service life. It serves industries from food processing to heavy automation, offering an unmatched combination of efficiency, versatility, and value.
With a center distance of 40 mm and maximum output torque of 47 Nm, the PMRV040 covers a ratio range of 5-100:1 in multiple mounting positions and output configurations. IEC-standard motor flanges ensure compatibility with global motor brands, while the precision die-cast aluminium housing guarantees dimensional accuracy and excellent heat dissipation.
Learn more about our engineering heritage and manufacturing capabilities.
📋 Technical Specifications
| Parameter | Value |
|---|---|
| Center Distance | 40 mm |
| Weight (without motor) | 2.3 kg |
| Available Ratios (i) | 5-100 |
| Max Output Torque (M2) | 47 Nm |
| Input Power Range (P1) | 0.06-0.55 kW |
| Max Radial Load Fr2 | 3,118 N |
| Motor Flange (IEC) | 63B5 / 71B5 |
| Output Shaft Diameter | 18 mm (H8) |
| Housing Material | Die-Cast Aluminium EN AC-46000 |
| Worm Wheel Material | Phosphor Bronze CuSn10P |
| Worm Shaft Material | 20CrMnTi case-hardened, 58-62 HRC |
| Lubrication | Synthetic ISO VG320 / Mineral VG320 |
| Mounting Positions | B3, B6, B7, B8, V5, V6 |
| Protection Class | IP54 standard / IP65 on request |
| Ambient Temperature | ?5 |C to +40 |C standard |
| Surface Finish | Powder coat, RAL 5010 Blue |
| Certifications | ISO 9001:2015, CE |
Internal cross-section: hardened worm shaft meshes with phosphor bronze worm wheel for efficient, quiet power transmission.
⚙️ Working Principle
The PMRV040 operates on the worm-and-wheel principle: a hardened steel worm shaft (input) engages a bronze worm wheel (output) at 90|, converting high-speed, low-torque motor rotation into low-speed, high-torque output. The helix angle determines ratio and self-locking behaviour | higher ratios produce stronger self-locking. Worm shaft bearings handle combined radial and axial loads simultaneously. Lubrication is achieved by oil-bath splash, with quantity specified per mounting position to prevent leakage and overheating.
⚡ Core Advantages
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Precision Die-Cast Aluminium Housing EN AC-46000 alloy body: high strength, excellent thermal dissipation, and corrosion resistance in a lightweight package. |
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Bronze Worm Wheel C-type phosphor bronze worm gear provides low friction, high wear resistance, and quiet operation under continuous duty. |
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Ultra-Low Noise Operation Precision CNC-ground worm geometry ensures noise below 65 dB(A) under rated load. |
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IEC-Standard Motor Flanges Direct IEC B5/B14 motor mounting eliminates coupling components, reducing assembly time and misalignment errors. |
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Self-Locking at High Ratios Natural load-holding above 30:1 ratio eliminates the need for separate brakes in many applications. |
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Multi-Position Mounting B3, B6, B7, B8, V5, V6 mounting positions with multiple output shaft and flange options (AS, AB, FA-FD). |
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Global Motor Compatibility IEC frames 56-132 enable direct pairing with motors from any international brand without adapters. |
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Wide Ratio Range Ratios from 5:1 to 100:1 single-stage, extendable to 5,000:1 in PMRV-PMRV two-stage configuration. |
Factory production: every PMRV040 unit undergoes precision machining, assembly, and run-in testing before dispatch.
🏭 Structure & Material Craftsmanship
Housing: Precision die-cast EN AC-46000 aluminium, CNC-machined mating faces (flatness |0.02 mm). Ribbed exterior maximises passive heat dissipation. Worm Shaft: 20CrMnTi steel, carburised and hardened to 58-62 HRC, ground to DIN 7 accuracy. Worm Wheel: Centrifugal-cast phosphor bronze (CuSn10P) rim, press-fitted to steel spider. Bearings: Deep-groove ball bearings (worm shaft), needle or tapered roller (wheel shaft). L10 > 20,000 h at rated load. Seals: Double-lip PTFE-coated oil seals at all shaft exits; breather plug allows thermal pressure equalisation. Finish: Shot-blast and blue polyester powder coat |60 |m dry film, UV- and chemical-resistant.
🎯 Typical Application Scenarios
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Industrial Automation Conveyor belt drives, rotary tables, and indexing systems rely on the PMRV's precise ratio control. |
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Food & Beverage Processing Sealed shafts and corrosion-resistant housing allow safe use in washdown bottling and filling lines. |
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Agricultural Equipment Gate drives, auger conveyors, and irrigation systems rely on PMRV self-locking and weather resistance. |
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Construction Machinery Concrete mixers, screen conveyors, and lifting mechanisms benefit from high torque and a robust housing. |
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Textile Machinery Spinning frames, weaving looms, and dyeing machines use PMRV for quiet, precise speed reduction. |
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Pharmaceutical Equipment Clean-room sealing options and smooth external surfaces meet hygiene requirements for mixing drives. |
🔎 Selection Guide
| Requirement | Recommendation |
|---|---|
| Low-speed high-torque conveyor | Select ratio 30-60, single output shaft (AS), B3 mounting, standard 80B5 motor flange for most conveyor applications. |
| Self-locking gate or actuator | Choose ratio |40:1 to ensure static self-locking. Verify dynamic back-drive torque before omitting a mechanical brake. |
| Hollow bore shaft-mount | Order hollow bore output and include the torque arm kit to restrain housing rotation. Specify bore diameter at order. |
| Outdoor / washdown environment | Specify IP65 sealing upgrade and synthetic ISO VG320 lubricant. Add stainless shaft if corrosion risk is high. |
| High cycle / frequent start-stop | Apply service factor table and select a unit with f.s. |1.5 for heavy load (Type C) duty at your daily operating hours. |
| Ratio > 100:1 required | Consider PMRV-PMRV double-stage configuration to achieve ratios up to 5,000:1 in a compact two-stage package. |
🏆 Quality Certifications & Service Commitment
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ISO 9001:2015 Certified Manufacturing processes certified under international quality management standards, ensuring consistency across every unit. |
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CE Marked Full compliance with European Machinery Directive 2006/42/EC, enabling direct sale and use across EU member states. |
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Custom Engineering OEM/ODM: shaft dimensions, flange configs, mounting positions, and finishes tailored on request. |
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Global Logistics Partnerships with major freight forwarders ensure safe, on-time delivery to 80+ countries with full export documentation. |
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24-Month Warranty Every gearbox covered by a 24-month warranty against manufacturing defects, backed by responsive after-sales engineering support. |
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Technical Support Dedicated engineering team available for selection assistance, custom specifications, and field troubleshooting worldwide. |
100 % output torque and no-load noise testing is performed on every PMRV040 unit before packaging and shipment.
❓ Frequently Asked Questions
Q: What input power can the PMRV040 accept?
A: Depends on gear ratio and operating conditions. Refer to the PMRV performance table for your specific ratio. Always apply the service factor.
Q: Can the gearbox be used outdoors?
A: Yes, with IP65 seal upgrade and synthetic lubricant. Shading from direct UV is recommended for extended outdoor installation.
Q: What ratio gives self-locking behaviour?
A: Ratios |30:1 typically self-lock under static load. Verify dynamic back-drive torque for safety-critical applications before omitting a brake.
Q: How often should lubricant be changed?
A: Synthetic ISO VG320: every 10,000 h or 2 years. Mineral VG320: every 5,000 h under normal continuous duty at 25 |C ambient.
Q: What output configurations are available?
A: Single shaft (AS), double shaft (AB), hollow bore (F), flanges FA/FB/FC/FD, double worm input shaft (VS) | all standard options.
🌎 Case Studies | Engineer Field Notes
🇩🇪 Germany
Application: Automotive assembly conveyor systems
The PMRV series arrived precisely to spec. The aluminium die-cast housing is impressively rigid, and after 18 months of 3-shift operation we have had zero failures. Our procurement team now uses this supplier exclusively.
🇺🇸 United States
Application: Food-grade packaging line drives
Synthetic oil fill and the smooth surface finish made FDA audits straightforward. The gearboxes run quietly and maintain ratio accuracy even after 10,000 operating hours.
🇮🇳 India
Application: Textile spinning frame drives
We replaced three competitor brands with PMRV063 units and saw maintenance calls drop by over 60%. The torque arms for hollow-bore units were also well-engineered and simple to fit.
🇮🇹 Italy
Application: Bottling machine conveyor drives
IEC flanges aligned perfectly with our Siemens motor range. The broad ratio selection meant we could standardise on one gearbox family across our entire machine lineup | a huge inventory simplification.
🇧🇷 Brazil
Application: Agricultural
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