Winchester made numerous bolt action 22 rifles.
Open the bolt, hold the trigger back, pull the bolt out
Numrich Gun Parts Corp would be your best bet in finding a bolt for your Winchester rifle.
This bolt is the same one used in the Winchester model 57, 69 and 75 rifles.
This requires the services of a gunsmith.
A model 1904 is a single shot bolt action rifle.
Try e-gunparts.com
Winchester did not produce a Model 81 bolt action. Exactly how is your rifle marked? sales@countrygunsmith.net
The Winchester model 70 is a bolt action sporting rifle. In 1936 Winchester introduced the bolt action rifle to the American Market. The model 70 was largely based on the Model 54.
Personal preference.
Pull the trigger all the way to the rear, and then insert the bolt.
The crossbolt safety on Winchester 94 has been introduced in 1992.