What is another word for journal box?
Pronunciation: [d͡ʒˈɜːnə͡l bˈɒks] (IPA) 
Journal box is a term commonly used in railway engineering to describe the device that supports the journal bearing in a railroad car or locomotive. Some of the synonyms for this term include the axle box, truck box, and bearing box. The primary function of the journal box is to hold the journal bearing that supports the axle and wheelset while also allowing rotation. It is essential to the proper functioning of rolling stock, and therefore there have been many variations developed over time. Some journal boxes are contained within the wheel center while others are mounted separately to the truck. Regardless, proper maintenance of the journal box is critical to ensuring safe and efficient railway operations.
