Thomson bearing part number system (nomenclature)

Thomson bearing part number system

Part number system

Prefix	Suffix	Definition
.	SS	STAINLESS STEEL CONSTRUCTION/ A, XA, ADJ, AND OPN IN STAINLESS STEEL
A	.	PRECISION GRADE BALL BUSHING
ADJ	.	ADJUSTABLE DIAMETER BALL BUSHING
B	.	COMMERCIAL GRADE BALL BUSHING
INST-SS	.	INSTRUMENT TYPE BALL BUSHING
OPN	.	OPEN TYPE BALL BUSHING
XA	.	SUPER PRECISION BALL BUSHING
XA	SS	SUPER PRECISION BALL BUSHING

PB-A Pillow block including ball bushing
PB-ADJ Pillow block adjustable diameter
PB-OPN Pillow block open type ball bushing
Super ball bushings - open and standard type
Seals, standard and stainless steel, for above ball bushings
Pillow blocks for super ball bushings
Retaining rings, standard and stainless steel for ball bushings
Resilient mounts for ball bushings
Combination bearing used with ball bushings
Nylined bearings
Die set ball bushings
Mill drill tabel, X-Y type, anti-friction
Roundway bearings
Roundway bearing seals
Case-hardened, "60 case", shafting
Support block for shafting
Support rails for shafting
Waymounts for shafting
Bronze case shafting
An example of our part number structure is as follows:

The Thomson A-162536 ball bushing designation is based on a nominal 1/16 ^inch. In other words, the "16" represents 16/16 inch Internal diameter of 1 inch, the "25" represents 25/16 inch, the outer diameter or 1.56 inch and the "36" represents 36/16 inch, the overall length of 2.25 inches. In general, the 1/16 inch principle applies to all our bearings. The dimensions of other products are similarly designated, in inches, or referenced in the Thomson catalogs.