Product Details

NTL bearing Co. supply various of Four Point Contact Ball slewing Bearing,below are some details.

Materials of rings and rolling parts
Generally, NTL use carbon-chromium bearing steel GCr15SiMn or GCr15 for rolling parts and surface-haredned steel 50Mn, 42CrMo, 5CrMnMo for the rings.

Material of cages
The cages for NTL slewing bearings include integral cage, segment cage and spacer-type cage. We use 20# steel or ZL102 birmasil for integral and segment cages, PA 1010 resin or ZL102 birmasil or QA110-3-105 albronze for spacer-type cages. In recent years with continuous development of material industry , nylon GRPA55.25 started to be applied for segment cages.

Material of seals
Generally, NTL use NBR or VITON for seals. But there still very few slewing bearings NTL manufactured in early period sealing with felted wool.

Standard JB/T2300-1999

Size Chart

Drawing Number Composition


	Material: 42-42CrMo 40-40Cr 50-50Mn
	Installing Hole Type: 0- Through holes on the inner and outer rings 1- Thread holes on the inner and outer rings 2- Thread holes on the inner ring, through holes on the outer ring 3- Thread holes on the outer ring, through holes on the inner
	No meaning digit, only avoid code confusion.
	Installing Match Type: 0-Standard type without Break 1-Standard type with Break 2-Special type
	Raceway Diameter
	Diameter of the rolling element
	Gear: 0-Toothless 1-External spur gear,smaller modle 2-External spur gear,bigger modle 3-Internal spur gear,smaller modle
	Design Type: 01-Single Row Four Point Contact Ball Slewing Bearing 02-Double Row Different Balls Slewing Bearing 11-Single Row Cross Roller Slewing Bearing 13- Three Row Roller Slewing Bearing