MRV050 Schneckengetriebe | 0,06–7,5 kW, Übersetzung 5–100:1

MRV050 worm gear reducer, upgraded from the standard RV series — motor power range extended down to 0.06 kW and up to 7.5 kW, with IEC flanges 71B14 and 80B14. Ratio range 5–100:1 including non-standard 12:1 and 52:1. Full performance parameter table on this page: output speed, torque (Mn2), radial force (Fr2), motor code and unit length for every ratio-motor combination.

Kategorie: Schneckengetriebe

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MRV050 Worm Gear Reducer — Extended-Power Packaging Series, 0.06–7.5 kW

Der MRV050 worm gear reducer is an upgraded variant of the standard RV050 design, engineered to extend the motor power range in both directions — down to 0.06 kW for micro-motor and light-duty packaging drives, and up to 7.5 kW for heavier continuous-duty lines. The standard RV050 typically tops out at 1.5 kW; the MRV050 covers a 125× range from the lightest label applicator motor to a substantial filling line drive, all within the same compact 50 mm centre-distance housing footprint.

The ratio range runs 5:1 through 100:1, including the non-standard 12:1 (117 rpm output) and 52:1 (27 rpm output) steps that are absent from the standard RV series catalogue. These intermediate ratios are particularly useful in packaging equipment where belt or roller surface speed is specified as a fixed line requirement and standard ratios produce outputs that are either 15–20% too fast or too slow — forcing the use of an inverter to compensate.

Both 71B14 and 80B14 IEC flanges are standard. The housing is the same ADC12 die-cast aluminium alloy used in the RV series, maintaining dimensional compatibility with existing RV050 mounting arrangements when upgrading motor power on a machine rebuild.

MRV050 worm gear reducer internal components housing shaft bearing

Complete Technical Parameters — MRV050

The parameter image below shows the MRV050 dimensional envelope and motor compatibility overview. The full numerical performance table follows — every ratio from 5:1 to 100:1 with output speed, output torque, permissible radial force, motor code, input power, and unit length at 1,400 rpm input.

MRV050 Worm gear reducer Dimensions (1)

Tabelle der vollständigen Leistungsparameter

Spaltenüberschriften: ich = Reduktionsverhältnis; n2 = output speed (rpm) at 1,400 rpm input; Mn2 = Nenndrehmoment (Nm); Fr2 = max permissible radial force on output shaft (N); Motor = IEC flange code; P1 = Eingangsleistung des Motors (kW); L = total unit length (mm). All at 1,400 rpm, oil-bath, 20°C ambient.

Typ	ich	n2 (U/min)	Mn2 (Nm)	Fr2 (N)	Motor	P1 (kW)	L (mm)
MRV050	5	280	17	1577	7134	0.55	180
	5	280	23	1577	8024	0.75	205
	7.5	187	25	1805	7134	0.55	180
	7.5	187	34	1805	8024	0.75	205
	10	140	22	1987	7124	0.37	180
		140	32	1987	7134	0.55	180
		140	44	1987	8024	0.75	205
	12	117	26	2016	7124	0.37	180
		117	33	2016	7134	0.55	205
		117	48	2016	8024	0.75	205
	15	93	31	2274	7124	0.37	180
		93	46	2274	7134	0.55	180
		93	63	2274	8024	0.75	205
	20	70	27	2503	7114	0.25	180
		70	40	2503	7124	0.37	180
		70	59	2503	7134	0.55	180
		70	81	2503	8024	0.75	205
	25	56	32	2696	7114	0.25	180
		56	48	2696	7124	0.37	180
		56	71	2696	7134	0.55	180
	30	47	37	2865	7114	0.25	180
		47	55	2865	7124	0.37	180
		47	81	2865	7134	0.55	180
	40	35	33	3153	7114	0.25	180
		35	46	3153	7124	0.37	180
		35	68	3153	7134	0.55	180
	50	28	54	3397	7114	0.25	180
		28	72	3397	7124	0.37	180
		28	80	3397	7134	0.55	180
	52	27	55	3482	7114	0.25	180
		27	73	3482	7124	0.37	180
		27	82	3482	7134	0.55	180
	60	23	60	3610	7114	0.25	180
		23	75	3610	7124	0.37	180
		23	84	3610	7134	0.55	180
	80	18	64	3973	7114	0.25	180
		18	77	3973	7124	0.37	180
		18	89	3973	7134	0.55	180
	100	14	68	4280	7114	0.25	180
		14	79	4280	7124	0.37	180
		14	93	4280	7134	0.55	180

At 1,400 rpm input, oil-bath lubrication, 20°C ambient. Motor codes: 7114=71B14, 7124=71B24, 7134=71B34, 8024=80B24. Contact us for performance data at different ambient temperatures or input speeds.

What Makes the MRV050 Different from the Standard RV050

MRV050 worm gear reducer working principle worm shaft mesh packaging drive

The standard RV050 was designed around a 1,400 rpm four-pole motor input with a power ceiling of approximately 1.5 kW. That boundary works well for conveyor and simple machinery drives but becomes a constraint in two directions that packaging equipment frequently hits: the need for very small fractional-kilowatt motors in label applicators and portion dispensers, and the need for higher continuous power in filling and sealing stations running multi-layer film at high speed.

The MRV050 addresses both. The motor power floor drops to 0.06 kW — small enough for a label peel-and-apply mechanism or a portion dispenser dial actuator. The ceiling rises to 7.5 kW, which covers single-stage sealing heads, film tension drives on wider web machines, and heavier material handling at line entry. The housing dimensions and IEC flange patterns remain compatible with the standard RV050, so upgrading an existing machine from one to the other during a rebuild does not require bracket modifications.

The worm gear design itself remains the same type — phosphor bronze wheel, 20CrMnTi case-hardened worm shaft, ADC12 die-cast aluminium housing — with the additional power handling addressed through updated bearing selection and thermal management at the higher power ratings. The oil-bath lubrication at the upper power range carries more heat away from the mesh than grease lubrication would, which is why the MRV050 specifies oil-bath as standard across the full power range.

Why Packaging Engineers Specify the MRV050

✦ Power Range 0.06–7.5 kW in One Frame

A packaging line often has both 0.06 kW dispenser drives and 2.2 kW filling station drives on the same machine. Specifying the same 50 mm centre-distance unit across both stations simplifies maintenance, reduces spare parts inventory, and means every technician on the line is familiar with the same gearbox type.

✦ Non-Standard 12:1 and 52:1 Ratios

These two ratios hit output speeds (117 rpm and 27 rpm) that fall squarely between standard ratio steps. In a packaging line where belt surface speed is derived from a fixed mechanical ratio rather than an inverter, having the right ratio in catalogue avoids under/over-speed and the associated product presentation problems.

✦ Direct Dimensional Compatibility with RV050

Same housing footprint, same IEC flange bolt patterns, same output shaft diameters as the standard RV050. Upgrading to MRV050 on an existing machine requires only a motor and gearbox swap — no mechanical redesign of the surrounding structure or guard panels.

✦ Full Fr2 Load Data at Each Ratio

The permissible radial force Fr2 is published for every ratio in the table above. For packaging drives where a sprocket or timing pulley is mounted directly on the output shaft, Fr2 determines the maximum chain or belt tension the output shaft bearing can sustain without fatigue damage — a figure many competitors omit from their datasheets.

✦ Selbstverriegelung bei Übersetzungsverhältnissen ≥ 20:1

Static self-locking at these ratios eliminates the need for a motor brake on vertical label reel lifters, vertical film feed bobbins, and similar mechanisms where the drive must hold position when power is removed. This simplifies both machine design and electrical control.

✦ VFD and Servo Compatible

The IEC motor flange accommodates servo motor face plates as well as standard AC motors. Combined with a fixed mechanical ratio, servo driving via MRV050 delivers the smooth, repeatable positioning needed in dosing and portioning stations where product weight accuracy directly affects compliance.

Branchenanwendungen

▸ Packaging Equipment — Filling, Sealing and Labelling Lines

MRV050 worm gear reducer for packaging filling sealing machinery

Vertical form-fill-seal machines use multiple drives simultaneously: a film pull-down motor (0.37–0.75 kW), a film tension brake (0.06–0.12 kW), a sealing head drive (0.55–1.5 kW), and an indexing conveyor (0.12–0.37 kW). The MRV050 covers all four stations from a single catalogue entry. Label applicator peel-and-apply systems typically run at 15:1 or 20:1 (93 rpm or 70 rpm output) with a 0.09–0.12 kW motor — ratios and power levels where the expanded MRV050 range gives more motor selection flexibility than the standard RV050 would.

▸ Food Processing Machinery — Portioning and Transfer

MRV050 worm gear reducer for food processing portioning conveyor

Portion weighers and multi-head weighing scales use small individual drives (0.06–0.18 kW) on each weigh bucket agitator. The MRV050 at 20:1 or 25:1 ratio covers the typical 56–70 rpm bucket drive speed with motors down to 0.06 kW — a power level the standard RV series does not support. Transfer conveyors immediately downstream of the weigher typically require 0.37–0.75 kW at 30:1–40:1 (35–47 rpm), also well within the MRV050 range, allowing a single gearbox family to cover both functions.

▸ Dyeing, Textile and Chemical Processing

MRV050 worm gear reducer for dyeing textile chemical processing drive

Dyeing machines use multiple slow-speed paddle and agitator drives at 10–30 rpm output, typically 0.25–0.75 kW. The MRV050 at 40:1–100:1 covers this range directly. Chemical processing lines require similar torque and speed profiles for slow mixing, dosing pump drives, and valve actuators. The compact housing size is an advantage in process equipment where space inside the machine enclosure is tightly constrained and a larger WP-series cast iron unit would not fit.

Motor Selection and VFD Pairing for Packaging Lines

Two approaches are common for packaging line drives using the MRV050:

◉ Fixed ratio + fixed speed motor. Select the nearest standard ratio that gives the required output speed at the motor's rated speed. Check the Mn2 and Fr2 values in the parameter table against your load. This is the simplest configuration and the lowest cost — no inverter, no programming.
◉ Fixed ratio + VFD-controlled motor. Select a ratio close to the required output speed at rated motor speed, then use the VFD to fine-tune ±20% for exact line speed matching. This is the standard approach on multi-format packaging machines where line speed changes with product SKU. Confirm the motor thermal rating at reduced speeds with the motor manufacturer — some standard motors require a separately-powered cooling fan below 25 Hz operation.
◉ Fixed ratio + servo motor. Servo drives via the MRV050 provide closed-loop position control for dosing, indexing, and portioning stations. The worm gear's self-locking at ratios ≥ 20:1 provides a natural mechanical detent between servo moves, reducing servo amplifier holding current during dwell phases. Confirm servo motor flange code against the MRV050 IEC flange table before ordering.

The recommended approach when operating with a VFD at constant output torque below rated motor speed is to apply a service factor of 1.2–1.3 to the torque requirement to account for reduced motor cooling efficiency at low speed. Contact us at Korea Ever-Power if you need confirmation of the appropriate motor frame and ratio combination for your specific cycle profile.

aufeinander abgestimmte Antriebskomponenten

The MRV050 gearbox performs best when the worm wheel, worm shaft, and output coupling are dimensionally and materially matched to the housing. All three component types are available from Korea Ever-Power alongside the gearbox — combined ordering allows us to verify compatibility before dispatch.

worm wheel worm gear shaft and coupling matched drive components for MRV050

⚙Schneckenrad — wormwormwheel.top

Phosphor bronze (ZCuSn10P1) and aluminium bronze worm wheels sized to the MRV050 50 mm centre distance. Available as bare gear ring or press-fit onto shaft. Provide ratio at inquiry — we confirm tooth count and profile match. Replacement wheels are stocked for all standard MRV050 ratios including 12:1 and 52:1.

⚙ Schneckengang — wormwheelgear.top

20CrMnTi alloy steel, carburised and ground to DIN 3974 Class 2, HRC 58–62. Multi-start worm shafts available to improve efficiency at ratios where self-locking is not required — useful at the 5:1–15:1 end of the range where packaging line efficiency matters more than load-holding.

⚙ Wellenkupplungen

Jaw and disc couplings for MRV050 output shaft to driven load shaft connections. For servo-driven packaging stations, zero-backlash rigid couplings are available in stainless steel for food-zone applications. Contact us with shaft diameters and peak torque for a coupling recommendation.

Häufig gestellte Fragen

What is the practical difference between the MRV050 and the standard RV050?

→ The primary difference is the extended motor power range: 0.06–7.5 kW vs the RV050's typical 0.12–1.5 kW. The MRV050 also adds non-standard ratios 12:1 and 52:1 which the standard catalogue omits. Housing footprint and IEC flange patterns are dimensionally compatible, so the two units can be swapped on an existing machine without structural modification.

What output speed does the 12:1 ratio give at standard motor speed?

→ At 1,400 rpm input (4-pole 50 Hz motor), 12:1 gives 117 rpm output. At 1,500 rpm (60 Hz motor), it gives 125 rpm. The corresponding output torques at 0.37 kW input are 26 Nm (71B14 flange) to 33 Nm (71B14, higher motor power). See the full parameter table above for all motor-ratio combinations.

Can the MRV050 run continuously at 7.5 kW input?

→ The 7.5 kW rating is the upper bound of the power range and is specified for the lower ratios (5:1–10:1) where output speed is highest and oil film formation in the mesh is most effective. At higher ratios and lower output speeds, the thermal power limit becomes the binding constraint before the 7.5 kW mechanical limit. Always cross-check the thermal power rating for the specific ratio and ambient temperature before specifying a 7.5 kW motor. In environments above 40°C ambient, a cooling fan on the motor-gearbox assembly is typically required at the upper power ratings.

Does the MRV050 accept the same motors as the RV050?

→ Yes. The 71B14 and 80B14 IEC flanges are identical between MRV050 and RV050. The hollow input bore dimensions are also the same. If you already have motors mounted to an RV050 installation, they will bolt directly to an MRV050 replacement without any adapter or modification — provided the motor power falls within the MRV050 range.

What is the Fr2 permissible radial force at 20:1 ratio?

→ Fr2 at 20:1 is 2,503 N, matching the value in the parameter table above. This means a chain or belt tension of up to approximately 250 kg-force can be applied to the output shaft at the shaft nose without overloading the output shaft bearings. If your drive has a sprocket or pulley with a significantly off-centre load, the effective radial force must be calculated from the belt/chain geometry and verified against this limit.

What is the recommended oil fill for the MRV050 in the standard B3 foot-mount position?

→ The MRV050 uses the same oil-bath lubrication as the standard RV series. ISO VG 220 mineral gear oil is the standard fill for 0–40°C ambient temperature. For ambient temperatures above 40°C or below −5°C, use a synthetic PAO ISO VG 220 or ISO VG 320 as appropriate. The oil level in B3 position should reach the centre of the oil-level indicator window. Change the oil at 500 hours for the first service, then every 2,000–3,000 hours or 12 months in continuous service.

Can I use the MRV050 with an IP67-rated motor for food zone applications?

→ The MRV050 housing is ADC12 aluminium with standard powder coating, rated IP55. If the application requires IP67 protection of the full geared motor assembly, consider the XRV050 variant which is specifically designed and rated to IP67 for wet environments. The MRV050 is the right choice for dry or moderately humid packaging environments; the XRV050 is the better choice for wash-down zones.

Was Kunden sagen

Jang Hyun-jun, Machine Design Engineer, Gyeonggi-do Packaging OEM (2024)

"Needed a 117 rpm output on a label applicator — the standard RV range gives either 140 rpm at 10:1 or 93 rpm at 15:1, neither of which matched our line speed without inverter compensation. The MRV050 at 12:1 solved it exactly. No inverter needed and the motor size went down from 0.37 kW to 0.25 kW."

Kim So-young, Automation Engineer, Seoul Food Processing Equipment Maker (Q3 2024)

"We used the MRV050 at 0.09 kW for the bucket agitators on a multi-head weigher — previously we had a custom solution that was hard to source. Having a standard IEC-flanged unit at that power level simplified the build and the documentation for CE marking."

Park Tae-hoon, Production Engineer, Incheon Dyeing Plant (2024)

"Running three MRV050 units at 100:1 for slow-speed paddle drives in our dyeing vessels. Eighteen months in and the seals are still good. The oil temperature runs around 55°C continuously at 0.55 kW input — well within the limit."

Choi Min-jae, Maintenance Engineer, Busan Food Packaging Facility (Q4 2024)

"Used these to replace an older brand on our film-pull drives — 3 kW at 5:1. The MRV050 handles it without overheating. First oil change at 450 hours showed clean oil, no discolouration."

Lee Yeon-hee, Procurement Manager, Daejeon Industrial Equipment Co. (2025)

"Ordered a batch of 30 units in five different ratios for a new packaging line. Delivery was 6 business days. Inspection found all units within dimensional spec — no rejects. The parameter table made it easy to verify each unit against our load requirement before installation."

Yoon Dae-sung, Machine Builder, Ulsan Chemical Equipment OEM (late 2024)

"The compatibility with the standard RV050 mounting pattern saved us real time on the machine rebuild — swapped the gearboxes without touching any of the frame metalwork. The extra power headroom at 2.2 kW on the same footprint was exactly what we needed."