Eliminating the system backlash preserves accurate axis positioning during the transition period between acceleration/steady state and deceleration, when the rack & pinion flank contact and load reverses direction.

Even high-precision rack & pinions with minimum backlash cannot meet the positioning requirements of ultra-accurate CNC machine tools. For these requirements, a preloaded rack & pinion drive is needed.

The DRP+,KRP+ reducers, through mechanical or electrial pre-load, provide a 0-backlash rack and pinion drive.

Accurate axis positioning is thus preserved - and is maintained even during the transition period between acceleration/steady state and deceleration, when the rack & pinion flank contact and load reverses direction.

Preloaded systems consist of a rack, two pinions, and a reducer/motor drive system.

Additional Information

Andantex modular designs permits rack lengths from 0.5 meters to 2 meters to be linked end to end achieving any desired travel length from standard components. Delivery for the standard rack and pinions is 3-4 weeks. In addition to our standard range, we can supply specials,based on your application needs. Rack and Pinions are available with different materials,heat treatments and quality levels to insure the correct balance of power,precision and price to meet application requirements. Typical applications are found in the following industries: Machine Tool,Carbon Fiber Replacement machines,Material Handling Machinery, Ultrasonic inspection Machinery,Cutting Machines.

Cost effective automatic lubrication systems are available to insure long life and trouble free operation.

Additional Information

ATLANTA Drive Systems, Inc., the World Leader in Rack & Pinion Drive Technologies, offers a wide range of zero-backlash rack & pinion drives that eliminate system backlash by means of a split-pinion and dual-pinion arrangement, providing ultra-precise positioning and repeatability. Positioning accuracy is maintained during acceleration and deceleration, as well as for direction of travel reversals.

The backlash is eliminated by using two pinions – one to drive the axis and the other to engage the opposite tooth flank and take up the backlash. Mechanically preloaded split-pinion drives utilize an axial spring to load one pinion half against the other. Electrically preloaded dual-pinion drives utilize two motors, each driving one pinion, which are loaded against each other by means of a special motor controller.

These drives are perfect for a wide range of applications, including traveling gantries & columns, milling machines, and material feel axis drives. Industries served include Material Handling, Automation, Aerospace, Machine Tool and Robotics.

Typical delivery time for these standard components is only 2 to 3 weeks - ideal for OEM's requiring just-in-time delivery schedules. Special and/or modified designs are always possible.

ATLANTA Drive Systems, Inc., the World Leader in Rack & Pinion Drive Technologies, offers a wide range of zero-backlash rack & pinion drives that eliminate system backlash by means of a split-pinion and dual-pinion arrangement, providing ultra-precise positioning and repeatability. Positioning accuracy is maintained during acceleration and deceleration, as well as for direction of travel reversals.

The backlash is eliminated by using two pinions – one to drive the axis and the other to engage the opposite tooth flank and take up the backlash. Mechanically preloaded split-pinion drives utilize an axial spring to load one pinion half against the other. Electrically preloaded dual-pinion drives utilize two motors, each driving one pinion, which are loaded against each other by means of a special motor controller.

These drives are perfect for a wide range of applications, including traveling gantries & columns, milling machines, and material feel axis drives. Industries served include Material Handling, Automation, Aerospace, Machine Tool and Robotics.

Typical delivery time for these standard components is only 2 to 3 weeks - ideal for OEM's requiring just-in-time delivery schedules. Special and/or modified designs are always possible.

As a single drive, the KRP+ features an integral output pinion and planetary gear train that have been optimized for minimum backlash ( 1-3 arc minutes) and maximum stiffness on rack. In line and right angle versions are available.

The dual drive kit combines two KRP+ reducers in a patented, mechanically preloaded, zero backlash system. The two units are torsionally preloaded against the rack in this closed loop mechanical system. Only one motor is required to drive the axis.

Two reducers can also be combined together in an electrically preloaded twin drive kit. Backlash is eliminated using two motors, one to drive the axis and one to preload the axis.

KRP+ reducers come in six sizes with ratios from 5-91:1 allowing linear speeds up to 3100 in./Min.( 78M/min.) and moving masses up to 200,000 Lbs. ( 91,000 Kg.)

When you need someone that makes deliveries on time, call Rack & Pinion.

Die cast, permanent and plastic mold ejector racks and pinions are our specialties. What's more, you can count on special pinions and racks for virtually any industrial or commercial use. Just follow the parameters below and your imagination.

Pinions - up to 10-Ft. long by 6-inch OD

Racks - lengths to your specification

Materials -Durable, ground and polished 4140 pre-hardened heat-treated steel (Rockwell "C" 32-34) is standard. Other materials and heat treat options are available.

That's not all. You can select standard racks & pinions from this catalog. Let us know when you need them as a repair item to get your machine up and running fast. Plus, you can have involute and parallel spline shafts made. Special rack tooth forms, along with metric modules, are available too.

And for you that perform injection molding, check out the "Quick Kicker"™ and "Spinner"™ ejector assemblies. So, call right now. Tell us what you need or send prints. Take advantage of a supplier that keeps its promises today. "Spinner" ™ R800 Series Rotary Core Ejector.