China wholesaler PA90 Helical Gear High Precision Planetary Gearbox with Low Backlash differential gearbox

Product Description

PA90 Helical Gear High Precision Planetary Gearbox with Low Backlash

There are many kinds and models of reducers. According to the control accuracy, reducers can be divided into general transmission reducers and precision reducers: general transmission reducers have low control accuracy and can meet the basic power transmission requirements of general mechanical equipment; Precision reducer has high precision, long service life, small return clearance and high reliability. It is suitable for high-end fields such as industrial robots, CNC machine tools, aerospace and so on.

Product Parameters

Characteristic:

(1) Low Noise:The use of helical gear design,to achieve a smooth,quite operation of the reducer.
(2) High Precision:Backlash is 3 arcmin or less,accurate positioning.
(3) High Rigidity,High Torque:The output shaft used large size,large span double support bearing design,which improves the rigidity and torque of the reducer.
(4) High Efficiency:1-stage up to 95% or more,2-stage up to 92% or more.
(5) Maintenance-Free:Low grease wear,can be lifetime lubrication.
(6) Sealing Effect is Good:Lubricating grease with high viscosity,not easy to separate the characteristics,ip65 protection class to ensure that no grease leakage.
(7) Installation Unrestrained:Can be installed arbitrarily.
(8) Wide Applicability:Applicable to any type of servo motor.
(9) An organic [integral] whole output axis.

Specifications PA60 PA90 PA120 PA140 PA180 PA220
Technal Parameters
Max. Torque Nm 1.5times rated torque
Emergency Stop Torque Nm 2.5times rated torque
Max. Radial Load N 1530 3250 6700 9400 14500 16500
Max. Axial Load N 630 1300 3000 4700 7250 8250
Torsional Rigidity Nm/arcmin 6 12 23 47 130 205
Max.Input Speed rpm 8000 6000 6000 6000 6000 3000
Rated Input Speed rpm 4000 3000 3000 3000 3000 1500
Noise dB ≤58 ≤60 ≤65 ≤68 ≤68 ≤72
Average Life Time h 20000
Efficiency Of Full Load % L1≥95%                        L2≥90%
Return Backlash P1 L1 arcmin ≤3 ≤3 ≤3 ≤3 ≤3 ≤3
L2 arcmin ≤5 ≤5 ≤5 ≤5 ≤5 ≤5
P2 L1 arcmin ≤5 ≤5 ≤5 ≤5 ≤5 ≤5
L2 arcmin ≤7 ≤7 ≤7 ≤7 ≤7 ≤7
Moment Of Inertia Table L1 3 Kg*cm2 0.16 0.61 3.25 9.21 28.98 69.7
4 Kg*cm2 0.14 0.48 2.74 7.54 23.67 54.61
5 Kg*cm2 0.13 0.47 2.71 7.42 23.29 53.51
7 Kg*cm2 0.13 0.45 2.62 7.14 22.48 50.92
8 Kg*cm2 0.13 0.45 2.6 7.14 / /
10 Kg*cm2 0.13 0.4 2.57 7.03 22.51 50.18
L2 12 Kg*cm2 0.13 0.45 0.45 2.63 7.3 23.59
15 Kg*cm2 0.13 0.45 0.45 2.63 7.3 23.59
20 Kg*cm2 0.13 0.45 0.45 2.63 6.92 23.33
25 Kg*cm2 0.13 0.45 0.4 2.63 6.92 22.68
28 Kg*cm2 0.13 0.45 0.45 2.43 6.92 23.33
30 Kg*cm2 0.13 0.45 0.45 2.43 7.3 25.59
35 Kg*cm2 0.13 0.4 0.4 2.43 6.92 22.68
40 Kg*cm2 0.13 0.45 0.45 2.43 6.92 23.33
50 Kg*cm2 0.13 0.4 0.4 2.39 6.92 22.68
70 Kg*cm2 0.13 0.4 0.4 2.39 6.72 22.68
100 Kg*cm2 0.13 0.4 0.4 2.39 6.72 22.68
Technical Parameter Level Ratio   PA60 PA90 PA120 PA140 PA180 PA220
Rated Torque L1 3 Nm 40 105 165 360 880 1100
4 Nm 45 130 230 480 880 1800
5 Nm 45 130 230 480 1100 1800
7 Nm 45 100 220 480 1100 1600
8 Nm 40 90 200 440 / /
10 Nm 30 75 175 360 770 1200
L2 12 Nm 40 105 165 360 880 1100
15 Nm 40 105 165 360 880 1100
20 Nm 45 130 230 480 1100 1800
25 Nm 45 130 230 480 1100 1800
28 Nm 45 130 230 480 1100 1800
30 Nm 40 105 165 360 880 1100
35 Nm 45 130 230 480 1100 1800
40 Nm 45 130 230 480 1100 1800
50 Nm 45 130 230 480 1100 1800
70 Nm 45 100 220 480 1100 1600
100 Nm 30 75 175 360 770 1200
Degree Of Protection   IP65
Operation Temperature ºC  – 10ºC to -90ºC
Weight L1 kg 1.25 3.75 8.5 16 28.5 49.3
L2 kg 1.75 5.1 12 21.5 40 62.5

Company Profile

Packaging & Shipping

1. Lead time: 7-10 working days as usual, 20 working days in busy season, it will be based on the detailed order quantity;
2. Delivery: DHL/ UPS/ FEDEX/ EMS/ TNT

FAQ

1. who are we?
CZPT Group is based in ZheJiang , China, start from 1998,has a 3 subsidiaries in total.The Main Products is planetary gearbox,timing belt pulley, helical gear,spur gear,gear rack,gear ring,chain wheel,hollow rotating platform,module,etc

2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;

3. how to choose the suitable planetary gearbox?
First of all,we need you to be able to provide relevant parameters.If you have a motor drawing,it will let us recommend a suitable gearbox for you faster.If not,we hope you can provide the following motor parameters:output speed,output torque,voltage,current,ip,noise,operating conditions,motor size and power,etc

4. why should you buy from us not from other suppliers?
We are a 22 years experiences manufacturer on making the gears, specializing in manufacturing all kinds of spur/bevel/helical gear, grinding gear, gear shaft, timing pulley, rack, planetary gear reducer, timing belt and such transmission gear parts

5. what services can we provide?
Accepted Delivery Terms: Fedex,DHL,UPS;
Accepted Payment Currency:USD,EUR,HKD,GBP,CNY;
Accepted Payment Type: T/T,L/C,PayPal,Western Union;
Language Spoken:English,Chinese,Japanese

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Application: Universal, Industrial, Household Appliances, Automation Equipment
Operating Speed: Low Speed
Excitation Mode: Excited
Samples:
US$ 350/set
1 set(Min.Order)

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Customization:
Available

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Currency: US$
Return&refunds: You can apply for a refund up to 30 days after receipt of the products.

helical gearbox

Precision and High-Accuracy Applications of Helical Gearboxes

Helical gearboxes are well-suited for precision and high-accuracy applications due to their unique design and performance characteristics:

  • Helical Gearing: The helical gears in these gearboxes offer smooth and continuous meshing, resulting in reduced backlash and improved positioning accuracy.
  • Efficiency: Helical gearboxes are known for their high efficiency, which minimizes energy losses and heat generation. This is crucial for maintaining precision in applications where even small deviations can have significant impacts.
  • Noise and Vibration: The helical gear tooth engagement helps in reducing noise and vibration levels, making them suitable for environments where quiet operation is required.
  • Load Distribution: Helical gears distribute load across multiple teeth, minimizing localized wear and extending the lifespan of the gearbox.
  • Smooth Motion: Helical gearboxes provide smoother motion transitions, which is crucial in precision applications where jerky or sudden movements are undesirable.
  • Positional Accuracy: The reduced backlash and improved meshing characteristics of helical gears contribute to higher positional accuracy, making these gearboxes ideal for applications such as CNC machines, robotics, and medical equipment.
  • Compact Design: Helical gearboxes can achieve high gear ratios in a relatively compact form factor, making them suitable for applications where space is limited.

Examples of precision applications where helical gearboxes are commonly used include CNC machining, robotics, semiconductor manufacturing, medical equipment, and metrology devices. The combination of efficiency, smooth operation, and accuracy makes helical gearboxes a preferred choice for achieving consistent and reliable performance in such applications.

helical gearbox

Impact of Thermal Expansion on Helical Gearbox Performance

Thermal expansion can significantly affect the performance of helical gearboxes due to changes in dimensions and clearances caused by temperature variations. Here’s how it impacts:

1. Misalignment: Temperature changes can lead to differential expansion of gearbox components. This can result in misalignment of gears, shafts, and bearings, leading to increased friction, noise, and reduced efficiency.

2. Lubrication: Thermal expansion can alter the clearances within the gearbox, affecting the distribution and viscosity of the lubricating oil. Inadequate lubrication due to temperature-induced changes can result in increased wear and premature failure.

3. Gear Tooth Engagement: Temperature fluctuations can cause gear teeth to expand or contract, affecting the meshing engagement and load distribution. Inconsistent gear tooth contact can lead to uneven wear and reduced gear life.

4. Bearing Performance: Bearings in helical gearboxes are sensitive to temperature changes. Excessive heat can lead to reduced bearing life, increased friction, and potential seizure, affecting overall gearbox performance.

5. Noise and Vibration: Thermal expansion can lead to changes in gear and component clearances, resulting in altered vibration patterns and increased noise levels. This can impact the comfort of the system and indicate potential issues.

6. Material Fatigue: Repeated cycles of thermal expansion and contraction can lead to material fatigue and stress accumulation, reducing the overall lifespan of gearbox components.

Managing Thermal Effects: Manufacturers design helical gearboxes with considerations for thermal expansion, using materials with low coefficients of thermal expansion and incorporating features like expansion joints or thermal isolators. Proper lubrication, monitoring temperature, and maintaining consistent operating conditions are also crucial in mitigating thermal expansion effects.

Understanding and managing the impact of thermal expansion is essential to maintain the performance, efficiency, and durability of helical gearboxes.

helical gearbox

Limitations and Disadvantages of Helical Gear Systems

While helical gear systems offer numerous advantages, they also come with certain limitations and disadvantages:

  • Axial Thrust: Helical gears generate axial thrust due to the helix angle of the teeth. This thrust can cause additional load on bearings and may require additional measures to counteract.
  • Complex Manufacturing: The manufacturing process for helical gears is more complex than that of straight-toothed gears, which can lead to higher production costs.
  • Axial Length: Helical gears require more axial space compared to spur gears with the same gear ratio. This can be a limitation in applications with space constraints.
  • Sliding Contact: Helical gears have sliding contact between their teeth, which can result in higher friction and more heat generation compared to rolling contact gears.
  • Efficiency: Although helical gears are generally efficient, their efficiency can be slightly lower than that of some other gear types, especially at high speeds.
  • Complexity in Gearbox Design: The inclination of helical gear teeth introduces additional complexity in gearbox design and alignment.
  • Reverse Thrust: In some cases, reverse thrust can occur when helical gears are subjected to high axial loads, leading to undesirable effects.

It’s important to consider these limitations and disadvantages when selecting gear systems for specific applications. Despite these challenges, helical gears remain a popular choice in various industries due to their benefits and overall performance characteristics.

China wholesaler PA90 Helical Gear High Precision Planetary Gearbox with Low Backlash   differential gearbox	China wholesaler PA90 Helical Gear High Precision Planetary Gearbox with Low Backlash   differential gearbox
editor by CX 2024-04-12

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