VRV030 Червячен редуктор | Резервна част за Ondrives Rino P45

VRV030 Medium-Frame Worm Gear Reducer

Technical Specifications — VRV030 P45

P45 Series — Ratio, Efficiency, Backlash & Inertia Table

Суфикси на номера на частите: стандарт = backlash ≤0.50°; А = ≤0.13°; Допълнена реалност = ≤0.066°. Efficiency (ηz) at nominal input speed 1,000 rpm. Reflected inertia at input in kg·m². All directions: Right Hand.

Note: Testing in your application is necessary. Confirm duty cycles and suitability with your own calculations. Values are for guidance only. Cooling may be needed at higher duty cycles.

Ratio and Backlash Class Selection Guide

Ratio Selection — Output Speed vs Self-Locking

At 1,000 rpm nominal input, the P45 output speed ranges from 100 rpm at 10:1 down to 8.3 rpm at 120:1. The practical self-locking threshold for worm gears lubricated with Shell Gadus S5 is approximately 40–50:1 under static conditions for this frame size. The 47% efficiency at 120:1 confirms the worm lead angle is well below the friction angle — this is the strongest self-locking ratio in the P45 range, suitable for vertical loads that must hold position without power.

For solar tracker azimuth drives where the panel is held in position between adjustments, the 30:1 (78% efficiency) or 60:1 (67% efficiency) ratios offer the best balance: strong enough self-locking to hold position under moderate wind load, but efficient enough that the servo or stepper motor does not need to be significantly oversized to overcome the worm gear back-drive resistance during moves.

For servo-driven robotic joints where back-drivability is preferred (for safe robot stopping), select 10:1 or 12:1 — efficiency 90%/89% at these ratios means the load can back-drive the input shaft if power is cut, which is the fail-safe behaviour in many collaborative robot designs. If you need to prevent back-driving in a robotic system for safety reasons, select 30:1 or above and confirm your motion controller handles the transition into the self-locking range.

Backlash Class Comparison

P45 vs P15 — When the Larger Frame is the Right Choice

Основни приложения

▸ Medium-Payload Industrial Robotics

Medium-payload collaborative robots (3–10 kg payload class) and industrial SCARA arms use wrist and elbow joint actuators in the 1–5 kg mass range. The P45 at 10:1 or 15:1 with class A backlash is a common specification in this segment — back-drivable (efficiency 86–90%), precision enough for servo positioning without electronic backlash compensation, and physically compact enough for a humanoid-scale wrist joint. The 450 N Fr2 limit comfortably handles a 2 kg end-effector at 0.3 m offset from the output shaft (generating approximately 60 N of radial force at full rated acceleration), with significant safety margin.

▸ Solar Tracking & Outdoor Precision Positioning

Single-axis solar trackers with panel widths from 1 to 3 m experience wind-induced torques that can exceed what a P15 output shaft bearing can sustain. The P45's 450 N Fr2 and 300 N Fa2 limits provide adequate safety margin for mid-size residential and commercial rooftop solar tracker installations. At 30:1 (78% efficiency), the self-locking is sufficient for most wind load conditions; at 60:1 (67%), the hold is very firm without a brake. Both ratios are standard in the P45 catalogue. The grease lubrication means no oil level management on roof or pole-mounted installations.

▸ Stage Machinery, Gate Actuators & Precision Automation

Stage rigging winches, automatic gate actuators, and security barrier drives in the 200–800 W motor power class often require the 60:1–120:1 ratio range to achieve slow, controlled output speeds from standard induction or brushless motors. The 47% efficiency of the P45 at 120:1 is the mechanism that provides the self-locking hold — the output shaft will not back-drive under static load, which is the primary safety requirement for these applications. Combined with class A or AR backlash, the P45 at 120:1 provides both precision and hold without a separate electromagnetic brake.

Ondrives & Rino P45 Replacement Compatibility

The VRV030 P45 is produced as an aftermarket-compatible replacement for the Ondrives & Rino P45 worm gear reducer. Korea Ever-Power is not affiliated with Ondrives & Rino — the VRV030 is an independent product designed to the same dimensional and performance specification. For original Ondrives & Rino components, contact the manufacturer directly.

Dimensional drawings and full test specifications are available on request via Корея Евър-Пауър. We recommend sample testing before committing to a fleet replacement program.

Съвпадащи компоненти на задвижването

At the P45 load level, correct coupling selection at both input and output shafts becomes more important than at the P15 level — the higher Fr1 and Fr2 limits mean the gearbox can sustain more coupling-induced loads, but incorrect coupling type still represents a common cause of premature bearing failure in precision servo drives.

Често задавани въпроси

What output speed does the P45-120 deliver at 1,000 rpm input?

→ 1,000 ÷ 120 = 8.33 rpm. At 1,500 rpm (6-pole motor at 50 Hz), 12.5 rpm. The 120:1 is the slowest output ratio in the P45 catalogue and is primarily used for very slow actuators — stage rigging, gate drives, and vertical positioning mechanisms — where the self-locking hold at 47% efficiency is the deciding specification.

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How does P45 efficiency at 10:1 (90%) compare to the P15 at 6.666:1 (86%)?

→ The P45 achieves 90% at 10:1 because its larger frame allows a larger worm diameter, which in turn allows a higher lead angle at this ratio — and higher lead angle directly reduces worm gear sliding losses. The P15 at its closest ratio (6.666:1) achieves 86% due to the smaller frame geometry. If you are comparing these two frames for a 10:1 application, the P45 is more efficient but substantially heavier and more expensive. The 4-point efficiency gain only matters in continuous duty at significant power levels.

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Is the 120:1 ratio safe for continuous duty or only intermittent use?

→ The 47% efficiency at 120:1 means that 53% of the input power is dissipated as heat in the gear mesh. For a 50W motor input, that is 26W of heat generation — manageable for intermittent duty in a free-air-cooled unit. For continuous duty at 120:1 with a significant motor power, calculate the thermal load and verify that the housing surface temperature does not exceed the maximum operating temperature of the Shell Gadus S5 grease. Cooling fans or extended housings may be needed above 30W continuous heat generation.

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Can I drive the P45 with a brushless DC motor at 2,500 rpm?

→ The maximum input speed is 3,000 rpm, so 2,500 rpm is within the rated limit. At 2,500 rpm input, the grease lubrication film must be adequate for the input bearing conditions at that speed. For continuous duty above 2,000 rpm at significant load, confirm with Korea Ever-Power that the specific duty cycle is within the thermal and lubrication limits for this frame. The input radial load limit Fr1=60 N must not be exceeded at the input shaft by belt tension or coupling-induced loads at any speed.

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If I order AR class, what is the actual measured backlash likely to be?

→ AR class guarantees ≤0.066° as the maximum. In practice, well-manufactured AR-class units from a controlled production process typically measure 0.04–0.06°. We cannot guarantee a specific lower bound, only the upper limit per the backlash class definition. If your application requires a specific measured value for documentation purposes, request a measurement certificate with the order — we can provide measured backlash values for each unit supplied.

Какво казват клиентите

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Kim Hyun-soo, Robotics Engineer, Seoul Collaborative Robot OEM (2024)

"Used P45-15A for wrist joints on a 5 kg payload cobot. The 86% efficiency at 15:1 allows the arm to be back-driven manually for programming — important for our collaborative application. Measured backlash was 0.09° on 6 units, all within the A-class spec. Drop-in replacement for P45 OEM units with a 38% cost saving."

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Park Ji-won, Automation Engineer, Daejeon Precision Equipment Maker (Q4 2024)

"P45-120AR for a precision vertical actuator on an inspection machine. The self-locking at 120:1 holds the probe at fixed z-height when servo power is removed between measurements. AR class backlash lets us achieve 0.05° repeatability without any electronic compensation. Nine months in service, no issues."

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Choi Dae-jin, Mechanical Engineer, Gyeonggi-do Solar Equipment Supplier (2025)

"Switched from P15 to P45 standard class for mid-size solar tracker tilt axis after calculating that the P15 Fr2 was insufficient for our 2m panel width at max wind load. The P45 at 30:1 holds the panel firmly against wind gusts without any supplementary brake. No failures in 85 units deployed over 14 months."

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Lee Seong-min, Controls Engineer, Busan Stage Equipment Integrator (late 2024)

"P45-60 standard class for a motorized scenic piece drive on a theatre stage. The 67% efficiency gives useful self-locking for the scenic hold position, and the 23.3 rpm output at 1,400 rpm motor input suits our move speed. Compact size fits within the scenic unit frame without modification."

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Yoon Hyeong-jun, Product Development Engineer, Incheon Automation Systems (Q1 2025)

"The reflected inertia data per ratio was critical for our servo sizing calculations. Very few suppliers for compact worm gearboxes at this price point provide this. The 6.15×10⁻⁶ kg·m² figure at 10:1 was accurate — our servo tuning matched the simulation closely on first commissioning."