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

KB030CP0 Thin Section Bearing Reference – Open Type C

KB030CP0 thin section bearing reference: LYDL-B030 Type C, open radial-contact thin section bearing.
Nominal d × D × B: 3 × 3.625 × 0.3125 in (76.2 × 92.075 × 7.9375 mm).
KB family with 0.3125-inch radial section and axial width; housing and retainers require separate space.
Three-inch radial bearing with additional section space.
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.

Three-inch radial bearing with additional section space

The KB030CP0 thin section bearing reference covers a three-inch bore with an open radial-contact envelope of 76.2 × 92.075 × 7.9375 mm. Its five-sixteenths-inch section is distinct from the KA three-inch envelope. Use LYDL-B030 Type C plus KB030CP0 when comparing a new cartridge design or discussing a replacement inquiry.

Dimensions · Reference loads · Model comparison · FAQ

KB030CP0 thin section bearing dimensions

Parameter	Symbol	in	mm
Bore diameter	d	3	76.2
Outside diameter	D	3.625	92.075
Axial width	B	0.3125	7.9375
Radial section	(D − d) / 2	0.3125	7.9375

A 3.625-inch outside diameter is not a three-inch seat

The three-inch bore locates the shaft, while the 3.625-inch outer diameter locates the housing. Keep those two interfaces separate when checking an existing cartridge. The 15.875 mm difference between them consists of the radial section on both sides of the ring. If the design originally used KA030CP0, the KB option requires an additional 3.175 mm of outer diameter and 1.5875 mm of width. That change affects housing machining and cover position even though the nominal shaft diameter agrees. Record both changes in the revision note.

Kaydon KB030CP0 reference load ratings

Reference rating	lbf	kN (converted)
Dynamic radial — Kaydon method	707	3.145
Dynamic radial — ISO comparison	1,651	7.344
Static radial	1,340	5.961

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-B030 Type C	Supply inquiry identity
Kaydon	KB030CP0	Open radial-contact reference
Silverthin	SB030CP0	Same nominal size and contact family
INA / Schaeffler	CSCB030	CSC catalog radial-contact reference

KB030CP0, SB030CP0 and CSCB030 identify brand-specific references for the 3 × 3.625 × 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 KB030CP0, 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.

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A compact support cartridge with replaceable inserts

A replaceable cartridge can simplify service, but only if the insert, housing and retention features are treated as a defined assembly. State whether the bearing is serviced alone or supplied within another component. Different service sequences can impose different access and handling constraints. For this possible application, include radial force, shaft overhang and the expected duty. A compact size should not be interpreted as suitability for arbitrary overhung loads. The reference table supplies geometry and attributed capacities, while the application review establishes the proposed configuration.

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)
KB030CP0	3	3.625	0.3125
KA030CP0	3	3.5	0.25
KB040CP0	4	4.625	0.3125
KA035CP0	3.5	4	0.25

KA030CP0 retains the shaft bore with a smaller section. KB040CP0 increases the bore at the same KB section, while KA035CP0 changes both the bore and section relative to the current model. These are different redesign paths. Compare the installation dimensions of KA030CP0, KB040CP0, KA035CP0. Explore the open Type C size table and radial-contact bearing category. For another contact arrangement, see the KB030XP0 four-point contact reference.

Track the bearing and cartridge revisions together

When revising from a KA to KB section, update the bill of materials and the assembly drawing at the same time. Otherwise, a correct new bearing may be delivered to an old outer seat. Keep the complete CP0 designation visible so the contact arrangement is also preserved. Check the locating surfaces and planned removal features before pressing the bearing into an insert. The mounting procedure should avoid forcing through the rolling contacts. Define acceptance checks for the assembled cartridge if it is the component that will be installed in the machine.

Inspection, handling and packing

If cartridges and loose bearings share a shipment, package them as separately identified items. Avoid allowing heavier inserts to contact the open rings. Incoming inspection should verify both model and revision rather than sorting solely by three-inch bore size.

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

Questions about this model

What must change when a cartridge moves from KA030CP0 to KB030CP0?

The outer seat grows from 88.9 to 92.075 mm and bearing width from 6.35 to 7.9375 mm. Update the housing depth, cover and bill of materials as well as the bearing reference.

Does 15.875 mm describe the width?

It is the outside-minus-bore diameter difference, equal to two radial sections. The actual nominal width and one-sided radial section are each 7.9375 mm.

Can the bearing be inspected separately from its insert?

Individual inspection may be useful, but if the supplied functional unit is an assembled cartridge, define its installed checks too. The insert and retention can influence running behavior and measured geometry.

Is a three-inch label enough for stores identification?

No. KA030CP0 and KB030CP0 share that bore but have different outer diameters and widths. Use the full model, contact type and applicable revision to avoid issuing the wrong section.

What matters for an overhung shaft load?

The force location and distance from the supports determine the bearing reactions and moment demand. Include support spacing and the overhang in the selection sketch instead of quoting only the applied force.

Request a quote for KB030CP0

Include “LYDL-B030 Type C, KB030CP0 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.