LYDL bearing assortment with thin section, geared and flanged bearing designs

KB050CP0 Thin Section Bearing Reference – Open Type C

KB050CP0 thin section bearing reference: LYDL-B050 Type C, open radial-contact thin section bearing.
Nominal d × D × B: 5 × 5.625 × 0.3125 in (127 × 142.875 × 7.9375 mm).
KB family with 0.3125-inch radial section and axial width; housing and retainers require separate space.
Five-inch radial support between KA and KC envelopes.
Kaydon reference dynamic and static radial loads are separately identified in the detail table; LYDL ratings require supply confirmation.
Request a quote with quantity, application and destination; provide mounting requirements for drawing review.

Five-inch radial support between KA and KC envelopes

The KB050CP0 thin section bearing reference has a five-inch bore, 142.875 mm outside diameter and 7.9375 mm width in the open Type C range. Use LYDL-B050 Type C for the LYDL inquiry, alongside the complete reference. This envelope sits between the KA and KC five-inch sections in installation space.

Dimensions · Reference loads · Model comparison · FAQ

KB050CP0 thin section bearing dimensions

Parameter	Symbol	in	mm
Bore diameter	d	5	127
Outside diameter	D	5.625	142.875
Axial width	B	0.3125	7.9375
Radial section	(D − d) / 2	0.3125	7.9375

Balancing the outer seat with available axial depth

A housing that can accept the 142.875 mm outer diameter may still lack sufficient depth for the bearing and retaining components. Check the radial and axial packaging decisions independently. The 0.3125-inch section is a geometric fact, not a statement that the complete assembly fits within that thickness. At the same five-inch bore, KA050CP0 is thinner and KC050CP0 is thicker. Reference load data can help define a comparison, but the resulting life calculation must retain a consistent rating convention and actual bearing reactions. Mixing one brand’s static value with another brand’s dynamic method is not a valid shortcut.

Kaydon KB050CP0 reference load ratings

Reference rating	lbf	kN (converted)
Dynamic radial — Kaydon method	933	4.150
Dynamic radial — ISO comparison	1,976	8.790
Static radial	2,150	9.564

Source: Kaydon official model table, referenced below. These are Kaydon reference capacities, not verified LYDL supply ratings. Dynamic values use a one-million-revolution L10 basis; the ISO column is a comparison rating calculated per ISO 281:1990. Static values assume rigid shaft and housing support. Ratings are not additive or simultaneous permissible loads. Conversion: 1 lbf = 0.0044482216152605 kN; displayed kN values are rounded.

Brand designations for this nominal envelope

Brand	Designation	Scope
LYDL	LYDL-B050 Type C	Supply inquiry identity
Kaydon	KB050CP0	Open radial-contact reference
Silverthin	SB050CP0	Same nominal size and contact family
INA / Schaeffler	CSCB050	CSC catalog radial-contact reference

KB050CP0, SB050CP0 and CSCB050 identify brand-specific references for the 5 × 5.625 × 0.3125 in radial-contact envelope. INA / Schaeffler uses CSC for the Conrad radial family; its following letter identifies the section. Compare the complete specification before interchange. Brand names remain with their owners; this LYDL offer does not imply brand authorization. Catalog references do not guarantee current availability.

Discuss your size and configuration

Send KB050CP0, quantity and the application to begin a quotation. Where an existing assembly must be preserved, identify its fixed interfaces and include the available drawing. A complete analysis is not required to start the commercial inquiry.

Request a Quote Request a Drawing

Design review for a belt-driven hollow hub

A belt-driven hub can place substantial radial force at a distance from its supports. Provide belt tension and pulley position rather than only transmitted motor torque. Support spacing and overhang determine how the belt force becomes individual bearing reactions. If the hub must accommodate services through its 127 mm nominal bore, include the shaft-wall and internal routing details. These are potential design considerations, not claims about tested installations. The available opening, load arrangement and lubrication plan should be evaluated together.

Illustrations of thin-section-bearing application contexts — General application illustration; suitability of this model depends on the actual machine design.

Related sizes and installation envelopes

Reference	Bore d (in)	Outside D (in)	Width B (in)
KB050CP0	5	5.625	0.3125
KA050CP0	5	5.5	0.25
KC050CP0	5	5.75	0.375
KD050CP0	5	6	0.5

The three alternatives all retain a five-inch nominal bore. Their increasing sections change outside diameter and width together. Compare the available housing volume before interpreting any difference in the reference load ratings as a reason to change size. Compare the installation dimensions of KA050CP0, KC050CP0, KD050CP0. Explore the open Type C size table and radial-contact bearing category. For another contact arrangement, see the KB050XP0 four-point contact reference.

Keep drive force and mounting force separate

The load during assembly is different from the operating belt force. Use a mounting procedure that seats the correct ring without passing installation effort through the balls. After the drive is tensioned, check the assembled condition because the operating support geometry may differ from the unloaded bench condition. Request inspection criteria related to the function of the hub, including the location at which running accuracy is measured. Do not infer a finished torque or speed limit from the CP0 suffix; these requirements belong in the agreed supply specification.

Inspection, handling and packing

For a belt-hub project, arrange labeling so the bearing specification remains linked to the hub revision. Transport protection should prevent ring-to-ring contact and corrosion while allowing the receiving team to identify the exact open radial configuration without unwrapping every item.

General bearing inspection and protective packaging illustration — Illustrative packing and inspection scenes; order-specific protection and records are agreed separately.

Questions about this model

Is motor torque sufficient to select KB050CP0 for a belt hub?

Usually more information is needed. Belt tension, pulley radius, force direction and overhang establish the bearing reactions. Motor torque alone does not describe the radial loading at each support.

Can a 143 mm housing drawing be used without checking the inch size?

The nominal bearing outside diameter is 142.875 mm. A rounded 143 mm description does not specify a suitable fit; the actual seat tolerance must be evaluated against the approved bearing drawing.

Why inspect rotation again after tensioning the belt?

The drive applies operating load and can alter support deflection. Comparing the unloaded and installed drive conditions helps identify whether the complete assembly meets its running requirements.

Is the INA naming reference CSCB050 a sealed version?

The CSCB050 catalog reference is used here for the open radial-contact envelope. Additional suffixes can describe other configurations; retain the full brand designation and review the current manufacturer specification before interchange.

Does changing to KD050CP0 leave the cover stack unchanged?

No. KD050CP0 is 12.7 mm wide versus 7.9375 mm for KB050CP0, and its outside diameter is 152.4 mm. Both axial retention and the outer seat require a redesign check.

Request a quote for KB050CP0

Include “LYDL-B050 Type C, KB050CP0 reference,” quantity and delivery destination. Add the required load case, speed and installation drawing when available. Ask for a drawing review if the shaft, housing or retention geometry must match an existing assembly.