You were asking about your osteoarthritis and the possibility of applying for disability. If you care to share more, other than the arthritis, do you have other physical or emotional problems that might add to the need for disability?
There are professionals (lawyers and other advocates) who can help you determine whether or not you would qualify for disability. Sometimes, they have their own team of medical and psychological people who can help evaluate and help "plead your cause."
It would be good to talk with your medical doctor(s) and see what they say, then talk with a legal professional who specializes in this type of law and begin the process of putting your case together.
Generally speaking your first attempt to apply for disability benefits are often denied, and the second attempt (especially with professional legal counsel) helps to pull it through. These are of course just general guidelines.
Will you talk with your doctor(s) and get an opinion?