Series | 
                                                                        N/A 2600 | 
                                                                                Cone Part Number | 
                                                                        N/A 2688 | 
                                                                                Cup Part Number | 
                                                                        N/A 2631-B | 
                                                                                Design Unit | 
                                                                        N/A Inch | 
                                                                                Cage Material | 
                                                                        N/A Stamped Steel | 
                                                                                d - Bore | 
                                                                        N/A 1.0625 in26.988 mm | 
                                                                                D - Cup Outer Diameter | 
                                                                        N/A 2.6150 in66.421 mm | 
                                                                                D1 - Flange Outer Diameter | 
                                                                        N/A 2.7670 in70.282 mm | 
                                                                                B - Cone Width | 
                                                                        N/A 1.0013 in25.433 mm | 
                                                                                C - Cup Width | 
                                                                        N/A 0.7500 in19.050 mm | 
                                                                                C1 - Cup Flange Width | 
                                                                        N/A 0.1560 in3.962 mm | 
                                                                                T1 - Bearing Width to Flange | 
                                                                        N/A 0.3435 in8.725 mm | 
| R - Cone Backface "To Clear" Radius1 | N/A 0.06 in1.5 mm | 
| r - Cup Backface "To Clear" Radius2 | N/A 0.030 in0.8 mm | 
                                                                                da - Cone Frontface Backing Diameter | 
                                                                        N/A 1.3 in33 mm | 
                                                                                db - Cone Backface Backing Diameter | 
                                                                        N/A 1.38 in35 mm | 
                                                                                Da - Cup Frontface Backing Diameter | 
                                                                        N/A 2.46 in62.48 mm | 
                                                                                Ab - Cage-Cone Frontface Clearance | 
                                                                        N/A 0.06 in1.5 mm | 
                                                                                Aa - Cage-Cone Backface Clearance | 
                                                                        N/A 0.01 in0.3 mm | 
| a - Effective Center Location3 | N/A -0.37 in-9.4 mm |