Racks
Welcome to the world’s widest range of high-quality racks and pinions.
As a specialist in the field of high-quality racks we offer more than 350 types of racks. This is most comprehensive rack program that is currently available on the market. Our four gear rack classes Ultra High Precision Rack, High Precision Rack, Precision Rack and Basic Rack include the quality 5 to 10, in helical or straight toothed design, milled or hardened as well as hardened and ground and in sizes from module 1.5 to 12. For the realization of complete rack and pinion drives, we also offer a wide range of suitable gears, pinion shafts and lubrication systems.
Rack Styles Available
helical toothed racks straight toothed racks round racks 
These racks have the teeth at an angle (19°31'42") to rack length for increased load capacity and quiet operation. These racks have the teeth perpendicular to rack length, and are traditionally known as"spur" These racks have a round crosssection and use bushings for support. Rack Quality Levels Overview
Class Rack Type Quality Total pitch error (±µm/m) Applications helical toothed straight toothed (HPR) High Precision Rack hardened & ground 6 36 wood working machines, plastic working machines, aluminium working machines, machine tools, water cutting machines, plasma cutting machines Series 29 Series 28 7 52 wood working machines, linear axes with high requirement for smooth running (PR) Precision Rack hardened & ground 8 60 portals, handling, linear axes Series 29 Series 28 milled, quenched & tempered 8 100 Series 38 Series 33 (BR) Basic Rack milled 9 150 linear axes with low load feed units for adjustment, lifting axes, handling, welding robots Series 47 Series 25 hardened 10 200 Series 39 Series 34 Rack Range Overview
Series Teeth System Material Available Modules Treatment Quality 25 straight heat-treatable steel 1; 1,5; 2; 2,5; 3; 4; 5; 6; 8; 10 milled 9 28 straight case hardening steel 2; 3; 4 case hardened & ground 6 28 straight heat-treatable steel 2; 3; 4; 5; 6; 8; 10; 12 case hardened & ground 6 28 straight heat-treatable steel 2; 3; 4; 5; 6; 8 case hardened & ground 7 28 straight heat-treatable steel 2; 3; 4; 5 case hardened & ground 8 29 helical case hardening steel 2; 3; 4 case hardened & ground 6 29 helical heat-treatable steel 1,5; 2; 3; 4; 5; 6; 8; 10; 12 case hardened & ground 6 29 helical heat-treatable steel 2; 3; 4; 5; 6; 8; 10 case hardened & ground 7 29 helical heat-treatable steel 2; 3; 4; 5; 6 case hardened & ground 8 33 straight heat-treatable steel 2; 3; 4 milled, quenched and tempered 8 34 straight heat-treatable steel 1; 1,5; 2; 3; 4; 5; 6; 8; 10 hardened 10 35 straight round bright steel 1; 1,5; 2; 2,5; 3; 4; 5 milled 9 35 straight round heat-treatable steel 1; 1,5; 2; 3; 4 milled 7 36 straight X8CrNiS 18-9 stainless 1; 1,5; 2; 3 milled 8 36 straight X8CrNiS 18-9 stainless round 1; 1,5; 2; 3 milled 8 37 straight bright steel Teilung 5 & 10 mm milled 9 39 helical heat-treatable steel 1,5; 2; 3; 4; 5; 6; 8; 10; 12 hardened 10 47 helical heat-treatable steel 1,5; 2; 3; 4; 5; 6; 8; 10 milled 9 25 straight heat-treatable steel 1; 1,5; 2; 2,5; 3; 4; 5; 6; 8; 10 milled 9 Advantage of long, ground racks of ATLANTA
For mounted racks, the obtained accuracy and required installation time are important. With ATLANTA ground racks with lengths of 1 500 mm and 2 000 mm, the total pitch error per meter is reduced dramatically. Thus, the pitch error of the entire axis is correspondingly lower. By using long racks, the number of rack joints is reduced, which improves the accuracy of the entire axis and significantly reduces the installation time at the same time.
Ground racks have the advantage that the complete rack is more precise, the meshing takes place evenly and the pinion bearing stress is reduced unlike a milled tooth. The ground rack drives have lower friction which increase energy efficiency.
Assembly Example:
The following example shows the advantage of long, ground racks of ATLANTA.
Assembly of module 4 racks.
- Assembly length: 6 meters mounted with companion rack for assembly i.e. Qjoint = 25µm
- Time: Number of screws x tscrew + number of joints x tjoint + number of pins x tpin
It will be used 3 pices of 29 40 205 quality 6, helical toothed, module 4, length 2 000mm :
- Accuracy GTf/2 000 = 47µm
- Maximum pitch error: 3 x 47µm (racks) + 2 x 25µm (joints) = 191µm
- Time: Number of screws = 3 x 16 = 48 screws, number of joints = 2, number of pins = 0
It will be used 6 pices 29 40 105 quality 6, helical toothed, module 4, length 1 000mm :
- Accuracy GTf/1 000 = 36µm
- Maximum pitch error: 6 x 36µm (racks) + 5 x 25µm (joints) = 341µm
- Time: Number of screws = 6 x 8 = 48 screws, number of joints = 5, number of pins = 0
It will be used 12 Stück 29 40 055 quality 6, helical toothed, module 4, length 500mm :
- Accuracy GTf/500 = 32µm
- Maximum pitch error: 12 x 32µm (racks) + 1 x 25µm (joints) = 659µm
- Time: = 12 x 4 = 48 screws, number of joints = 11, number of pins = 12 x 2
Advantages of using long, ground racks of ATLANTA:
- Reduced pitch error values
- Reduced number of rack sections required
- Reduced the number of rack joints
- Reduced amount of time needed to mount the racks
Document Download
Title Index Language Date Size / Type MPZ 001 Installation and Maintenance Instruction for Rack & Pinion D en 03.05.2011 2,8 MB / PDF MPZ 001 Installation and Maintenance Instruction for Rack & Pinion D de 03.05.2011 2,8 MB / PDF 
Access CAD Drawings ATLANTA Rack Range
Pinion and Pinion Shaft Program
High quality pinions and pinion shafts for realization of complete rack & pinion drives.
ATLANTA Lubrication System
The ATLANTA lubrication system for constant precision lifelong.
Solutions from the modular system
For each application the best solution with ATLANTA modular system.
Mounting of ATLANTA Racks
The ATLANTA Assembly Kit for mounting of ATLANTA racks to the correct pitch.
Rework
Individual rework of standard parts acc. customer drawings.