High Precision Gearbox | Precise Rack and Pinion System

Cycloidal & Planetary Gearboxes and Zero Backlash Rack & Pinion Systems for Robotics, Automation and Motion Control

LPR Global provides advanced solutions for your rotary and linear transmission needs with innovative technology that holds patents in USA, Europe, Japan, and Korea. Our products include high precision gearboxes, backlash-free rack and pinion systems, and customized reduction gears.

 

We have developed a unique cycloidal tooth profile to overcome the limitations of conventional gears. The rolling contact offers zero backlash, high durability and high shock resistance. With two reduction stages, our gearbox achieves superior accuracy, high torque and a wide ratio range. We have also applied this patented technology to develop a Zero Backlash Rack & Pinion System, which provides precise control and positioning, clean operation, low noise and compact size.

Custom Gear Reducers | Backlash Free Rack & Pinion

LPR’s rotary and linear transmission products employ unique tooth profiles that are specially designed to reduce errors of conventional gears and drive systems. Our products compete with renowned brands such as Harmonic Drive, Nabtesco, Nexen, and Kamo. LPR’s engineered products, which hold over 20 global patents, can be applied to various applications including machine tools, industrial robots, welding positioners, satellite antennas, medical equipment and more. We serve leading companies in these industries such as Doosan Infracore, Samsung Techwin, Hyundai Motor Company, and Hyundai Wia Corp.

Main Products

High Precision Gearbox | Two Stage Gear Reducer

The High Precision Reduction Gears feature patented reduction principles. They have two reduction stages with planocentric and planetary gears, which reduce vibrations in high speed operations, minimize input inertia and increase tooth contact ratio. Backlash and lost motion are minimized with the trochoidal motion of the planocentric gear, ensuring the precise operation of the gearbox.

Clean Rack and Pinion System | Backlash Free Rolling Contact

The Clean Rack and Pinion System is an excellent alternative to linear motors, ball screws and helical or involute rack and pinions. We designed our system with a modified cycloidal gear profile, which has a rolling motion to achieve zero backlash. This design reduces the contact stress, noise and wear that come with other linear transmissions. High precision, high speed, unlimited stroke lengths and designs, and low maintenance are just some of the advantages LPR offers. Our clean rack and pinion system can operate lubrication-free, making it ideal for applications where clean installation and operation are required such as clean room, pharmaceutical and food industries.

Applications | Positioning System, Linear Actuator, Index Drive, Robot Axis

Application
Product
Description
Welding Positioners and
Tilting Tables
PQ Series
High Precision Gearbox
Tracking Antenna
PH Series
High Precision Gearbox
Airplane Riveting and
Bolting Systems
CRP Series
Planetary Gearbox
Rack and Pinion
Servo Gearbox
Automobile Brake Testing System
PQ Series
High Precision Gearbox
Automatic Loading/Unloading System
(Clean Room Condition)
CRP Series
Rack & Pinion
Vacuum Assembly System
(Clean Room Condition)
CRP Series
Rack & Pinion
Precision Injection Molding
CRP Series
Rack & Pinion
Magnetic Resonance Imaging
CGE Series
Rack & Pinion
Automatic Tool Changer (ATC)
RQ Series
High Precision Gearbox
LCD Manufacturing Equipment
PQ Series
PH Series
High Precision Gearbox
Howitzer
PQ Series
PH Series
High Precision Gearbox
OLED Deposition Equipment
(Vacuum Condition)
CGE Series
Rack & Pinion
Wafer Manipulator
SQ15K
Custom Gearbox
  • Welding Jig Turntables

  • Torsion Testing Machine

  • Inspection Turntable

  • Panel Flipping/Tilting Systems

  • Robot Transfer Unit

  • Automated Transfer System

  • Gantry Robot

  • MRI Machine

  • Loading and Unloading System

  • Airplane Wing Bolting System

  • Robot Drive Axis

  • Automotive Brake Testing Equipment

High Precision Gearbox | Cycloidal Reduction Gears

LPR’s rotary transmission systems use a unique planocentric structure and mechanism to provide high performance with advanced features. The patented cycloidal tooth profile maximizes the tooth contact ratio and increases shock load capabilities while keeping backlash at less than 1 arc-min. Using a two-stage reduction design, they overcome the vibration and inertia found in traditional gearboxes. The gearbox is a completely sealed unit equipped with multiple bearing supports and lifetime lubrication.

 

High Precision Gearbox Ordering Code PDF Icon

High Precision Gearbox

PQ Series Solid Shaft Gearbox | Specificationspdf-icon

Product TypeHigh Precision Gearhead - Solid ShaftHigh-precision Reduction Gear | PQ Series
Reduction Ratio Range7 - 700
Rated Output Torque8 - 12000 Nm
Lost Motion< 1 arc-min

PH Series Hollow Shaft Gearbox | Specifications pdf-icon

Product TypeHigh Precision Gearhead - Hollow ShaftHigh-precision Reduction Gear | PH Series
Reduction Ratio Range40 - 800
Rated Output Torque30 - 7200 Nm
Lost Motion < 1 arc-min

Customized Gearbox Solutions

In addition to our wide range of standard products, we can create customized reduction gears to suit a variety of applications. Our team of highly skilled engineers can develop innovative designs with high precision, high output torque and compact size. Contact us to learn more about how we can meet your requirements.

Key Benefits

  • Compact and lightweight
  • Wide range of reduction ratios: 3-500
  • Completely sealed structure with lifetime lubrication, delivered ready for installation
  • Patented tooth profile with 60% tooth contact
  • High precision, less than 1 arc-min backlash
  • Lower input inertia
  • Maximized tilting rigidity
  • Superior torsional rigidity
  • Low noise and vibration
  • Higher rated output speed

Applications

  • Machine Tools
  • Defense
  • Cutting Systems
  • Semiconductor Equipment
  • Industrial Robots
  • Aerospace
  • Medical Equipment
  • Testing and Measuring Equipment

We can provide comparisons between our high precision gearbox and other well-known brands upon request. Please contact us for further technical information. 

High Precision Gearbox Structure | Reducer Mechanism pdf-icon

High Precision Gearbox Structure | Power Series

Precise Rack and Pinion | Zero Backlash, High Speed, Lubrication Free

 

The Clean Rack and Pinion Series is distinctive from conventional rack and pinion systems because of our proprietary tooth profile. The uniquely modified cycloidal shape creates a rolling motion, which maximizes the tooth contact ratio and lowers the tooth surface pressure and contact stress. Slippage and backlash are minimized, providing high efficiency and productivity. Noise is also controlled even at high speeds (standard 6 m/s, maximum 10 m/s). Minimum or no lubrication is required, ensuring clean installation and operation. The pinion is completely sealed (IP54-IP67) with an internal, self-lubricating structure that has support bearings at both ends. There is no limit to stroke lengths and designs; we can provide customized solutions for both linear and rotary motion challenges with these key features. Our Clean Rack and Pinion Series enables quiet and smooth operation of gears with minimum wear.

 

Precise Rack and Pinion Series Specifications pdf-icon

 

Key Benefits | Precise Rack and Pinion

  • Clean performance and installation
  • High tooth contact ratio with the modified cycloidal tooth profile
  • High efficiency and accuracy
  • High speed (Standard 6m/s, Maximum 10m/s)
  • Zero backlash
  • Low noise and vibration
  • Little to no maintenance or lubrication required
  • Custom rack sizes for unlimited lengths
  • Great substitute for linear motor
Clean Rack and Pinion

LE Series | Gearbox-Integrated Pinion

 

The LE Series is an innovative, all-in-one solution that integrates the gearhead within the pinion, resulting in a compact, zero-backlash and low-noise unit. Its unique rear mounting structure eliminates the need for additional output shafts, shrinkable connectors, reduction gears or mounting structures, as is the case with front mounting. All models are designed to IP65 standards and come with lifetime lubrication. Incorporating our patented tooth profile, the LE series is capable of high accuracy, increased load capacity and faster acceleration.

Gearbox-Integrated Pinion

Please contact us to learn how our Clean Rack and Pinion can replace your linear motor, ball screw or traditional rack and pinion systems.

Planetary Gearbox | Classic Reduction Gear

XP Series | Signature Planetary Gearbox

XP-C2 Series

Product TypePlanetary gear High-precision Reduction Gear | XP Series
Reduction Ratio Range4 ~ 91
Rated Output Torque6.5Nm ~ 180Nm
Lost Motion2 ~ 20 arc-min
CharacteristicEconomical

XP-S2 Series

Product TypePlanetary gear High-precision Reduction Gear | XP Series
Reduction Ratio Range4 ~ 91
Rated Output Torque6.5Nm ~ 180Nm
Lost Motion2 ~ 20 arc-min
CharacteristicEconomical

XF-C2 Series

Product TypePlanetary gear High-precision Reduction Gear | XP Series
Reduction Ratio Range3 ~ 90
Rated Output Torque6.5Nm ~ 180Nm
Lost Motion2 ~ 20 arc-min
CharacteristicEconomical


CP Series | Standard Planetary Gearbox

CP-C2 Series

Product TypePlanetary gear High-precision Reduction Gear | CP Series
Reduction Ratio Range3 ~ 100
Rated Output Torque3.5Nm ~ 180Nm
Lost Motion2 ~ 20 arc-min
CharacteristicStandard planetary gear

CP-S2 Series

Product TypePlanetary gear High-precision Reduction Gear | CP Series
Reduction Ratio Range3 ~ 100
Rated Output Torque3.5Nm ~ 180Nm
Lost Motion2 ~ 20 arc-min
CharacteristicStandard planetary gear

MM Series | Compact Planetary Gearbox

MM-C2 Series

Product TypePlanetary gear High-precision Reduction Gear | MM Series
Reduction Ratio Range3 ~ 100
Rated Output Torque3.5Nm ~ 180Nm
Lost Motion2 ~ 20 arc-min
CharacteristicSmall planetary gear

MM-S2 Series

Product TypePlanetary gear High-precision Reduction Gear | MM Series
Reduction Ratio Range3 ~ 100
Rated Output Torque3.5Nm ~ 180Nm
Lost Motion2 ~ 20 arc-min
CharacteristicSmall planetary gear

ED+ Series | Economical Planetary Gearbox

Product TypePlanetary gear High-precision Reduction Gear | ED+ Series
Reduction Ratio Range3 ~ 100
Rated Output Torque3.5Nm ~ 180Nm
Lost Motion8 ~ 20 arc-min
CharacteristicEconomical

SS Series | Hollow Shaft Planetary Gearbox

Product TypePlanetary gear High-precision Reduction Gear | SS Series
Reduction Ratio Range10 ~ 250
Rated Output Torque2Nm ~ 600Nm
Lost Motion2 ~ 10 arc-min
CharacteristicHollow shaft gear

Rack and Pinion Gantry Robot | High Payload

LPR offers medium and heavy duty rack and pinion gantry robots for automotive engine transferring, tire automation, welding automation.

 

Compared to linear gantry robots, rack and pinion robots allow a higher payload up to 3,600 kg, and precision.

 

We can provide standard 1-axis, 2-axis, 3-axis gantries with payload up to 400 kg. Heavy duty gantries for challenging applications are also available. Nominal speed of gantries starts from 2.6 m/s.

Gantry Robot 3 axis
Gantry Robot 3 axis

Iron | Aluminum | Steel Gantry Loader Solutions

Rack and pinion gantry loaders are commonly used to carry materials to castings machines. With a required payload usually over 100 kg, standard gantry systems do not allow such operations, hence a rack and pinion system has to be applied. A fully automated gantry system for more than 20 casting sets can be installed at your plant.

Aluminum Gantry Pouring System
Aluminum Gantry Pouring System

For more information about the rack and pinion gantry robots, please visit Gantry Robots page.

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