|  | Kaydon part number codesReali-Slim TT® turntable bearings
Kaydon Reali-Slim TT® turntable bearings are marked for complete identification with an 11-digit part number. Positions 1–8 identify type, ball size, and ball pitch. Position 9 identifies gearing. Positions 10 and 11 identify inner and outer holes.
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| Position 1—Type |  
| T | Four-point contact radial ball bearing |    
| Position 9—Gearing |  
| E | External gear |  
| N | Internal gear |  
| P | Plain—no gear |    
| Position 10—Inner hole |  
| A | Inner hole style of through holes |  
| B | Tapped mounting holes |  
| C | Countersunk mounting holes |    
| Position 11—Outer hole |  
| A | Outer hole style of through holes |  
| B | Tapped mounting holes |  
| C | Countersunk mounting holes |   Holes sized for #4-40 screws, tapped, countersunk, or through gears set at full depth involute, 64 DP., 20° pressure angle.
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