This idler wheel can be found in models 1961 and up to the last vinyl jukebox by Rock-Ola. It is designed to play both 33 and 45 rpm records - those with a small and large centre hole. This feature was called "Mech-O-Matic" by Rock-Ola when advertised in June 1961. Jukeboxes without this feature could be converted too. Because of this it is possible that idler wheel RO112 can be found too in Tempo 1, Tempo 2, Regis, Princess and Empress models if they are equipped with the Intermix-Feature. Also it is possible that later models for 45 rpm only - no Intermix - are equipped with earlier idler wheel RO111 though the parts lists show different.

The idler wheel is made from aluminuim with an extra made rubber ring and a precise bushing. Inner diameter of centre hole: 4.7 mm.

To know if this idler wheel fits your Rock-Ola, please check the following:

• The rubber is vulcanised to the metal and can't be removed? The inner diameter of the centre hole is 4.7 mm (3/16")? And your jukebox is set up for 45/33 rpm, the so called "Mech-O-Matic" resp. "Intermix" with a turntable with sensor and pin assembly (three moveable bars around a pin in the center) instead of a big center hub?
  In this case you will need this complete idler wheel RO112.
• The rubber is vulcanised to the metal and can't be removed? The inner diameter of the centre hole is 4.7 mm (3/16")? Your jukebox is set up for 45 rpm only because the TT has been modified so that the three bars are not moveable?
  In this case you will need this complete idler wheel RO112.
• Or can you remove the old rubber ring of the idler wheel easily? The inner diameter of the centre hole is 5.4 mm (7/32")? And your jukebox is set up for 45 rpm only (no Intermix)?
  If yes, then you will need either the idler wheel RO111 or alternatively only the rubber ring RO115.

Please note: The inner diameter of the centre hole of this idler wheel RO112 is 4.7 mm = 3/16". Please compare.