45 rpm adapter

rdf:langString 45 rpm adapter

rdf:langString A 45 rpm adapter (also 45 rpm record insert, 45 rpm spindle adapter, 7-inch adapter or spider, the common size of 45 RPM records) is a small plastic or metal insert that goes in the middle of a 45-rpm record so it can be played on the standard size spindle of a turntable. The adapter could be a small solid circle that fits onto the spindle (meaning only one 45 could be played at a time) or a larger adapter that fits over the entire spindle of a record changer, permitting a stack of 45s to be played. These are often referred to as 45 spindles. A few manufacturers supplied a complete change of spindle for 45s. The first 45 rpm inserts were introduced by the Webster-Chicago Corporation, also known as Webcor. They were made of solid zinc, difficult to insert into a record and almost impossible to remove without breaking the disc. A differently shaped, but similarly difficult-to-use metal adapter was made by Fidelitone. Capitol Records for a time produced what they called "Optional Center" or "O.C. 45" records. These had a triangular section molded in with an LP-size spindle hole that could be punched out for playing on 45 rpm spindles. Some EMI and other British records have a similar feature. The EMI version is circular, with four small notches holding the center part onto the rest of the record.