Product Description

ISO 9001 Approved Worm Speed Gear Gearbox Reduction Gear Box Reducer (Nmrv)

Input Configurations	Double or single input shaft (NRV)
	PAM / IEC motor input shaft with circle or square flange (NMRV)
Output Configurations	Double or single output shaft
	Output flange

Main Feature

The gearbox can rotate in both directions operate and contains 1 oil filling at delivery.  you will benefit from its high quality and a short delivery time.

Specification

Model	Motor Input Flange (circle)					Transmission Ratio												Power (kw)	Ratio (i)	Nominal Torque (Nm)
	PAM / IEC	Internal Dia.	Dis. Between Diagonal Screw Holes	External Dia.	Width of Key Slot	5	7.5	10	15	20	25	30	40	50	60	80	100
		N	M	P	E	Diamter of Input Shaft
NMRV25	56B14	50	65	80	3	9					–	9				–		0.06	7.5-60	2.6-14
NMRV30	63B5	95	115	140	4	11									–			0.06-0.18	7.5-80	2.6-14
	63B14	60	75	90
	56B5	80	100	120	3	9											–
	56B14	50	65	80
NMRV40	71B5	110	130	160	5	14								–				0.09-0.37	7.5-100	11-53
	71B14	70	85	105
	63B5	95	115	140	4	11
	63B14	60	75	90
	56B5	80	100	120	3	–								9
NMRV50	80B5	130	165	200	6	19							–					0.12-0.75	7.5-100	21-89
	80B14	80	100	120
	71B5	110	130	160	5	14											–
	71B14	70	85	105
	63B5	95	115	140	4	–							11
NMRV63	90B5	130	165	200	8	24							–					0.25-1.5	7.5-100	56-166
	90B14	95	115	140
	80B5	130	165	200	6	19										–
	80B14	80	100	120
	71B5	110	130	160	5	–							14
	71B14	70	85	105
NMRV75	100/112B5	180	215	250	8	–	28			–								0.55-4	7.5-100	90-269
	100/112B14	110	130	160
	90B5	130	165	200	8		24							–
	90B14	95	115	140
	80B5	130	165	200	6		–			19
	80B14	80	100	120
	71B5	110	130	160	–		–						14
NMRV90	100/112B5	180	215	250	8	–	28						–					0.55-4	7.5-100	101-458
	100/112B14	110	130	160
	90B5	130	165	200	8		24									–
	90B14	95	115	140
	80B5	130	165	200	6		–						19
	80B14	80	100	120
NMRV110	132B5	230	265	300	10	–	38				–							1.1-7.5	7.5-100	242-660
	132B14	130	165	200	–
	100/112B5	180	215	250	8		28									–
	90B5	130	165	200			–				24
	90B14	95	115	140	–
	80B5	130	165	200			–									19
NMRV130	132B5	230	265	300	10	–	38							–				2.2-7.5	7.5-100	333-1596
	132B14	130	165	200	–
	100/112B5	180	215	250	8		–				28
	90B5	130	165	200	–		–									24
	90B14	95	115	140
NMRV150	160B5	250	300	350	12	–	42					–						2.2-15	7.5-100	570-1760
	132B5	230	265	300	10		–			38					–
	132B14	130	165	200	–
	100/112B5	180	215	250	8		–							28

Company profile

Scenario

Packing

FAQ

Q1: I want to buy your products, how can I pay?
A: You can pay via T/T(30%+70%), L/C ,D/P etc. 

Q2: How can you guarantee the quality?
A: One year’s warranty against B/L date. If you meet with quality problem, please send us pictures or video to check, we promise to send spare parts or new products to replace. Our guarantee not include inappropriate operation or wrong specification selection. 

Q3: How we select models and specifications?
A: You can email us the series code (for example: RC series helical gearbox) as well as requirement details, such as motor power,output speed or ratio, service factor or your application…as much data as possible. If you can supply some pictures or drawings,it is nice. 

Q4: If we don’t find what we want on your website, what should we do?
A: We offer 3 options:
1, You can email us the pictures, drawings or descriptions details. We will try to design your products on the basis of our
standard models.
2, Our R&D department is professional for OEM/ODM products by drawing/samples, you can send us samples, we do customized design for your bulk purchasing.
3, We can develop new products if they have good market. We have already developed many items for special using successful, such as special gearbox for agitator, cement conveyor, shoes machines and so on. 

Q5: Can we buy 1 pc of each item for quality testing?
A: Yes, we are glad to accept trial order for quality testing.

Q6: How about your product delivery time?
A: Normally for 20’container, it takes 25-30 workdays for RV series worm gearbox, 35-40 workdays for helical gearmotors.

Application:	Motor, Machinery, Agricultural Machinery
Hardness:	Hardened Tooth Surface
Installation:	B3,B6,B7,B8,V5,V6
Layout:	Coaxial
Gear Shape:	Cylindrical Gear
Step:	Single-Step

Customization:	Available | Customized Request

Advantages of Using Worm Gear in an NMRV Gearbox

Worm gears offer several advantages when used in an NMRV gearbox:

1. High Reduction Ratio: Worm gears provide a high reduction ratio in a compact form, allowing for significant speed reduction in a single stage.

2. High Efficiency: While worm gears typically have lower mechanical efficiency compared to some other gear types, the design of the NMRV gearbox optimizes efficiency by using a bronze worm gear and a self-locking mechanism that minimizes backdriving.

3. Compact Design: Worm gears have a compact and space-efficient design, making them suitable for applications with limited installation space.

4. Smooth and Quiet Operation: The meshing of worm gears and the helical design of the worm result in relatively smooth and quiet operation.

5. Self-Locking: Worm gears inherently have a self-locking characteristic, meaning that the gear cannot easily be back-driven by the worm. This property is beneficial for applications where holding position without external locking mechanisms is essential.

6. High Torque Capacity: Worm gears can transmit high torque loads, making them suitable for applications that require high torque output.

7. Simple Lubrication: The design of the NMRV gearbox allows for efficient lubrication of the worm gear, ensuring optimal performance and longevity.

These advantages make worm gears a popular choice for NMRV gearboxes in various industrial applications, where their characteristics contribute to reliable and efficient power transmission.

Common Problems Associated with NMRV Gearboxes

NMRV (worm gear) gearboxes are reliable and durable, but like any mechanical system, they can experience certain issues over time. Here are some common problems that can be associated with NMRV gearboxes:

• Overheating: Inadequate lubrication or excessive load can lead to overheating, causing accelerated wear and potential damage to the gearbox components.
• Noise and Vibration: Unusual noises or excessive vibration during operation could indicate misalignment, worn gears, or damaged bearings.
• Leakage: Oil leaks can occur due to worn seals or damaged gaskets, leading to lubricant loss and potential contamination of the surrounding environment.
• Worn Gears: Over time, gear teeth can wear down due to friction and load. This can result in reduced efficiency, increased backlash, and compromised performance.
• Misalignment: Improper installation or mounting can lead to misalignment between the input and output shafts, causing increased friction, wear, and reduced efficiency.
• Backlash: Excessive backlash between the worm gear and the mating gear can lead to poor positioning accuracy and reduced efficiency in motion control applications.
• Poor Lubrication: Using incorrect or inadequate lubricants, or neglecting proper lubrication maintenance, can lead to increased friction, wear, and potential failure of gearbox components.
• Seal Damage: Worn or damaged seals can result in oil leaks and contamination, affecting the performance and lifespan of the gearbox.
• Shaft Wear: Over time, the input and output shafts can experience wear due to load and friction, affecting the overall operation of the gearbox.
• Corrosion: Exposure to harsh environments or corrosive substances can lead to corrosion of gearbox components, reducing their lifespan.

To prevent and address these common problems, it’s crucial to follow proper maintenance and servicing practices, use high-quality lubricants, address issues promptly, and consult professionals when needed. Regular inspections and proactive maintenance can help extend the operational lifespan and reliability of NMRV gearboxes.

Industries Using NMRV Gearboxes

NMRV gearboxes find widespread use in various industries due to their versatility and reliability. Some common industries include:

• Food and Beverage: NMRV gearboxes are used in conveyor systems, mixers, and packaging equipment.
• Material Handling: They are employed in conveyor belts, lifting equipment, and automated material handling systems.
• Automation and Robotics: NMRV gearboxes play a critical role in precise motion control and positioning in robotic systems.
• Textile: They are used in machinery for spinning, weaving, and fabric processing.
• Pharmaceutical: NMRV gearboxes are utilized in pill coating machines, mixers, and other pharmaceutical processing equipment.
• Agriculture: They find applications in irrigation systems, conveyor systems, and various agricultural machinery.
• Packaging: NMRV gearboxes are used in packaging machinery to ensure controlled movement and accuracy.
• Automotive: They are used in automated assembly lines and manufacturing processes in the automotive industry.
• Printing: NMRV gearboxes contribute to precise movement and synchronization in printing machinery.
• Energy: They are employed in wind turbine systems, solar tracking systems, and other renewable energy applications.

The adaptability and efficiency of NMRV gearboxes make them a preferred choice in industries that require reliable and precise power transmission solutions.

editor by CX 2023-10-12