How old is the hotpoint dryer model nbxr463eb3ww

It should be down by the burner assembly

Check the levels by putting a spirit level on the top and adjust the feet to level, The model no. may be on the edge of the door, visable when you open it.
pete

get the serial number and go to www.hotpoint com.and yes they are still a company.adrian,,,,

http://www.pronto.com/user/search.do?displayQuery=hotpoint%20manual&SEM=true&query=hotpoint%20manual&adid=1211340620-4518825-0_gs&ref=hotpoint%20manual&creativeid=3323566150&site=

your model # appears to be in complete. if you have the two strand type located behind the drum, you can buy a restring kit. will have direcions with part. take model # and order at repairclinic.com

Sounds like the drum bearing or shaft is worn.
Remove rear panel of dryer, you should see the drum shaft, check for wear here.

Depends when the dryer was made, older models had the element at the front behind the front panel.
More recent models all have the element located at the rear of the dryer..
Hope this helps.

http://www.appliancepartspros.com/partsearch/model.aspx?model_id=207752
Looks like the part number is "AP4379804"

http://www.pcappliancerepair.com/model-display.php From what I see, you have to remove the front, and maybe the drum to get at the belt. See what instructions come with a new belt.

Probably due to the age of the dryer, and continous use, especially if it has been used on high heat settings, also the continuous action of clothes turning and thigs like zips and buttons will contribute to wearing away the enamel.