Page 12 - Craft Bearing Catalog
P. 12

Nomenclature Breakdown                                                                                     Lubrication
                 Bearing Company Inc.




                         In order to simplify bearing size and part identification, all numbers and letters
                               in Craft Bearing’s part numbers have a specific descriptive meaning.
                Nomenclature                                                                      Example
                Inch bore sizes are in one inch increments plus the number of sixteenth of an     203 = 2 3 /16”
                inch.  The first one or two numbers are the whole inch and the last two are the    900 = 9”
                number of sixteenth.                                                              1208 = 12 8 /16” (12 1 /2”)

                Metric Bore Sizes are indicated by the number of millimeters followed by          S1 BCH 100mm HD
                the letters “mm.”                                                                 S1 BCH 75mm FL
                S1 = Medium duty                                                                  S1 BCH 312 FL
                S2 = Heavy duty              The duty series are available to best suit           S2 BCF 403 HD

                S3 = Extra Heavy duty        load, life, and speed   requirements.                S3 BC 1100 FL
                S4 = Special duty                                                                 S4 BCH 307 HD
                B =  bearing only (one split inner race, two split clamp collars, one split roller    S1 B 207 FL
                    cage assembly, one split outer race)                                          S2 B 615 HD
                                                                                                  S3 B 900 FL
                C = cartridge (only) for held or floating bearing type                            S1 C 500
                                                                                                  S2 C 308
                H = pedestal housing (only) for held or floating bearing type                     S1 H 208
                                                                                                  S2 H 315
                F = flange housing (only) for held or floating bearing type                       S1 F 208
                                                                                                  S2 F 315
                BC = bearing-cartridge w/seals (a replacement “insert”)                           S1 BC 203 FL
                                                                                                  S2 BC 315 HD
                BCH = complete pillow block (bearing-cartridge w/seals and pedestal housing)      S1 BCH 515 FL
                                                                                                  S2 BCH 515 HD
                BCF = complete flange block (bearing-cartridge w/seals and flange housing)        S1 BCF 315 FL
                                                                                                  S2 BCF 800 HD
                FL = floating (expansion) type bearing                                            S1 BCH 207 FL
                                                                                                  S2 BCF 415 FL

                HD = held (fixed/non-expansion) type bearing                                      S1 BCH 207 HD
                                                                                                  S2 BCF 415 HD
                ATL =  aluminum triple labyrinth seals - two seals per unit (split)               ATL 407
                UHMWTL = UHMW triple labyrinth seals                                              ATL 200mm
                                                                                                  UHMWTL 500
                C-2 = less than normal internal clearance (reciprocating loads - crank shafts, etc.)   S2 B 307 FLC2
                                                                                                  S1 BCH 607 HDC3
                C-3, C-5 = greater than normal internal clearance normally used in high
                temperature applications, above 200°F use C-3 and above 340°F use C-5.
                  If no identifier is provided then a C-Normal running clearance will be provided.

                XX = letter, or number/letter suffix - added to identify special modifications    S1 BCH 507 FLXX
                to suit a particular customer’s needs, or a special application.

              Note:                                                  •  Standard  O-ring  material  is  buna  nitrile.  For  high  temp-
                                                                       erature  applications,  viton  O-rings  are  recommended  and
              •  Bearing sizes to 12” (300 mm) are in normal stock for immediate   are  automatically  included  when  C-3  or  C-5  clearance  is
                shipment. Bearing sizes over 12” are available. Please call for   specified.
                price and delivery.
                                                                     •  Many “special” or otherwise non-standard bore sizes or “one
              •  When  ordering  seals  separate  of  an  assembly,  specify  the   off” pieces can be made upon demand. Please confer with our
                number of seals needed.                                technical department.

              10              Craft Bearing Company, Inc.  n  Newport News, Virginia  n  www.craftbearing.com

         Craft	Bearing	2017	Catalog	+	Spe10			10                                                                     8/14/17			1:51:22	PM
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