Racks
Our product range includes straight and helical toothed racks in ground as well as in milled design. We manufacture both standard and special solutions in various modules, dimensions and materials, also hardened and coated.
We have many racks in standard design on stock, which are immediately available for you on demand.
- ground, straight & helical, gear quality 5
- quenched & tempered, straight & helical
- induction hardened, straight & helical
- milled, straight & helical
- made of stainless material
- Assembly parts
- Racks made of plastic
- Round racks milled
- Round racks stainless
- Guide bushes
- Racks for linear guideways
Technical specifications for the respective rack designs can be found in the download area.
| Modul | fp/300 | fp/300 | fp/500 | fp/500 | fp/1000 | fp/1000 |
|---|---|---|---|---|---|---|
|
1 |
5 |
18 |
5,5 |
20 |
6 |
25 |
|
2 |
5 |
18 |
5,5 |
20 |
6 |
25 |
|
3 |
5 |
20 |
6 |
22 |
6 |
25 |
|
4 |
6 |
20 |
7 |
25 |
7 |
28 |
|
5 |
6 |
20 |
7 |
25 |
7 |
28 |
|
8 |
7 |
22 |
8 |
25 |
8 |
28 |
|
10 |
7 |
22 |
8 |
25 |
8 |
28 |
Due to our extensive manufacturing capabilities, we offer a wide range of custom made racks:
Racks with Ground Teeth
- Straight or helical teeth
- Max. length is 3 000 mm
- Gearing up to module 16
- Racks are ground on all faces
- Materials, hardening or surface coating according to customer requirements
Racks in Milled Design
- Straight or helical teeth
- Max. length in one setting is 4 000 mm
- Modules 0,5 – 30
- Back and side surfaces either ground or milled
- Materials, hardening or surface coating according to customer requirements
Mounting Pieces
To ensure accurate pitch distance between two racks during assembly. In addition to our standard range, we offer mounting pieces with other modules and individually chosen dimensions.
Racks Overview
This section contains a selection of our products with further links to the respective technical specifications. Didn’t find what you were looking for? Contact us and we will be pleased to advise you on your project.
Good to know
A rack is essentially a gear with an infinitely large pitch diameter and root diameter. In simple terms, it is nothing more than a "straightened" gear. As a result, the geometry of the rack corresponds to the unwound geometry of a gear with involute toothing (other types exist). As part of the machine elements, it serves to transmit forces.
In combination with a gear, also called a pinion, it is called a rack and pinion drive. The aim here is to change between a translational movement and rotational movement. Examples of motion conversions can be:
- Generating a rotational motion by moving the rack with a hydraulic cylinder.
- Generating a rectilinear motion by means of an electric motor
The module is one of the most important parameters for racks and gears. This is a standardized dimension according to DIN 780 and describes the tooth size as shown in the following figure. In general, it is important to ensure that the same module is used for meshing gears.
But how do you determine the module for existing racks and gears? There is limited direct way to measure the module. One possibility is to use module gauges. Another option is to determine it by calculation. The modulus can be calculated using easily determined measured variables.
Due to the wide range of uses and the associated industry-specific requirements, a number of rack designs have become established.
Toothing
With straight toothing, axial forces that occur due to design are avoided. In addition, their manufacture is comparatively simple and economical. The main disadvantages of spur gearing are the abrupt meshing of rack and pinion and the higher noise level. Therefore, the use of spur toothed racks is recommended for lower circumferential speeds. Helical gearing offers smoother running, higher load capacity and more continuous torque transmission. However, higher purchase costs and the need to compensate for axial forces must be expected.
Material
The material from which racks are made varies depending on the requirements. C45 quenched and tempered steel, which is frequently used in mechanical engineering and vehicle construction, is also used here. If corrosion resistance is required, free-cutting steel 1.4305 (X8 CrNiS 18-9), which is easier to machine, is a common solution. However, it does not necessarily have to be steel. Plastic racks are also used in cases where their requirements allow it. If you have any questions about selecting the perfect rack for your application, we will be happy to assist you.
In the case of racks, this is referred to as the gear quality. Quality requirements resulting from the application have an effect on the production of the rack. The first step is to determine the circumferential speed. This is the starting point for further design. The speed determines the selection of a straight or helical toothed rack. In addition, the required quality can already be narrowed down. The table shows some application examples.
