Cqd y Cia. Ltda. - Ovalle
  • AddressRio Refugio 1259, Pudahuel SANTIAGO
  • Factory AddressRio Refugio 1259, Pudahuel SANTIAGO
  • Phone(Working Time)2-24954125
  • Phone(Nonworking Time)2-24954125
  • Fax2-24954125

Company Profile

Cqd y Cia. Ltda. - Ovalle supplies needle roller / thrust ball bearings in two series: NX series  with a full comple­ment thrust ball bearing.. NKX series  with a thrust ball bearing with a cage

These combined bearings:
consist of a radial needle roller bearing and a thrust ball bearing
are supplied without an inner ring
can be combined with an inner ring , where the shaft cannot be hardened and ground (→ product table, must be ordered separately) 
can accommodate axial loads in one direction and, therefore, locate the shaft in one direction only
can be mounted back-to-back , for short shafts and where changes in length due to thermal expansion are relatively minor 
For these types of arrangements, SKF recommends preloading the thrust ball bearings with Belleville washers (cup springs). This preload helps to prevent the balls from skidding if one of the thrust bearings becomes unloaded. Preload also improves performance of the thrust ball bearings while reducing noise levels.
NX series bearings
consist of a radial needle roller bearing and a full complement thrust ball bearing 
are suitable for applications where there are moderate radial loads and lighter, single direction axial loads
have low cross-sectional height, which enables shaft centrelines to be positioned close together like for multi-spindle drills
can be mounted with a snap ring, or against a shoulder in the housing bore, for axial support 
The snap ring groove in the outer ring provides a cost-effective and axially space-saving solution .
are most often oil lubricated and therefore supplied without grease
have a stamped steel cover that
extends over the shaft washer of the full complement thrust ball bearing
is firmly attached to the radial needle roller bearing
makes these bearings non-separable
has lubrication holes as standard

Company Details

  • 963367
  • North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Mid East, Eastern Asia, Western Europe, Central America, Northern Europe, Southern Europe, South Asia, Domestic Market
  • Needle Thrust Roller Bearings
  • 69
  • 369874
  • 2012
  • 93778XX3.X3X6X.XSS

History

have a stamped steel cover for bearings with designation Z  that
has no lubrication holes
extends over the shaft washer of the thrust ball bearing
is firmly attached to the housing washer that is integral to the needle roller bearing outer ring
makes these bearings non-separable
Sealing solutions
Cqd y Cia. Ltda. - Ovalle supplies certain needle roller / thrust ball bearings capped with a stamped steel cover over the thrust part of the bearing (designation suffix Z). The cover, which has no lubrication holes, forms a gap-type seal to retain the grease in the bearing.

When capped bearings must operate under certain conditions, such as very high speeds or high temperatures, some grease may leak. For bearing arrangements where this would be detrimental, appropriate actions could be taken.

Greases for capped bearings
The thrust part of combined needle roller bearings with the designation suffix Z is supplied greased as standard. They are filled with high-quality grease (table 1) under clean conditions.

The relatively large quantity of grease in the bearings means they can be operated for long periods before relubrication is required (→ Perform calculations). 
Relubrication features
The needle roller bearing used in combined bearings has an annular groove with one lubrication hole in the outer ring.

Needle roller / full complement thrust ball bearings in the NX series without the designation suffix Z have a cover with lubrication holes over the thrust part of the bearing . Most often they are oil lubricated and, therefore, Cqd y Cia. Ltda. - Ovalle supplies these bearings without grease.

Cages
needle roller / thrust ball bearings are fitted with cages.

When used at high temperatures, some lubricants can have a detrimental effect on polyamide cages. For additional information about the suitability of cages, refer to Cages.

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