Gears/Gearboxes Testing

Gearboxes Testing
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SANDMARK Global, Inc. offers a comprehensive range of mechanical, chemical, structural, and life-testing services for manufactured components and systems. Our staffs are trained and certified in data acquisition, analysis, measurement and testing. Our coverage ranges from mechanical, electro-mechanical and electronic components, assemblies and systems.




Gears/Gearboxes Testing

As part of our offering of comprehensive gear sourcing solutions, we provide full testing and measurement services for gears, gearboxes and transmission systems, including:


Determination of Gear Quality Class (AGMA, DIN, ISO, JIS)

Lead and Profile Charts

Gear Tooth Geometry Measurements

Composite Error Plots

Core Hardness Measurement

Case Hardness and Case Depth Measurements

Gearbox Life Testing


GEAR QUALTIY NUMBER (Q-NUMBER)

SANDMARK can manufacture and supply high quality gears, up to Gear Quality Number (also called Q-Number) AGMA 14 (DIN 3, or ISO 3). The Q-Number for a gear is a measure of the geometric accuracy level of teeth on the gear.

While the standard used in the USA is set by AGMA (American Gear Manufacturer's Association) ; other regions of the world use different standards for gear teeth quality. The following table lists the relationships between different standards (JGMA – Japanese Gear Manufacturers Association , ISO - International Organization for Standardization , and DIN - Germany).


AGMA (USA) ISO (INTERNATIONAL) DIN (GERMANY) JIS (JAPAN)
13
4
4
0
12
5
5
1
11
6
6
2
10
7
7
3
9
8
8
4
8
9
9
5

 


GEAR MATERIAL GRADE

The material 'grade' is a measure of the quality and cleanliness/cleanness of the material (alloy uniformity, grain structure, non-metallic inclusions). AGMA classifies material grades for gears as Grade 1, 2 and 3. Grade 1 is regarded as 'standard' quality in industrial applications, while Grade 2 is considered 'Premium', and Grade 3 is 'Super Premium'. Grades 2 and 3 materials need to meet 'material cleanness' requirements specified by AMS (Aerospace Material Specifications) managed by SAE (Society of Aerospace Engineers) , as follows:

AGMA Grade AMS Number
3
2300
2
2301
1
N/A

SANDMARK can manufacture and supply gears in all three grades, depending on our customers' specifications.

 

HARDENING

Various hardening techniques for core and case hardening (induction hardening, carburizing, carbonitriding, gas nitriding, etc.) allows us to meet and exceed specifications for gears made from steel alloys. Hardness is measured by 'Rockwell Number' . The degree of hardening in a sample being hardened (and case depth, in the case of case hardening) depends on the hardenability of the material and the settings of the hardening operation. SANDMARK offers all standard hardening techniques as part of our portfolio. Most gears that SANDMARK supplies to our customers have some form of hardening operation (in many cases, both core hardening and case hardening) requirements.

Please contact us to discuss your requirements and we will be happy to work with you.

 

HANDLING

One of the most critical aspects of gears manufacturing, but often not given due importance, is the quality of handling that is required as the gear makes its way through the various manufacturing operations, and once it is completed, the packaging/care required until the gear is transported from the fabrication floor to the assembly point.

SANDMARK has developed custom 'Transfer Trays' and 'Carriers' to handle gears while they go through the various fabrication and measurement steps, and once completed, special packaging that ensures that individual gears are adequately protected until they reach their destination.



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