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

KA030CP0 Thin Section Bearing Reference – Open Type C

KA030CP0 thin section bearing reference: LYDL-A030 Type C, open radial-contact thin section bearing.
Nominal d × D × B: 3 × 3.5 × 0.25 in (76.2 × 88.9 × 6.35 mm).
KA family with 0.25-inch radial section and axial width; housing and retainers require separate space.
Three-inch reference for inch-to-metric retrofit checks.
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 reference for inch-to-metric retrofit checks

The KA030CP0 thin section bearing reference covers the three-inch open radial-contact size. Its dimensions are 76.2 mm bore, 88.9 mm outside diameter and 6.35 mm width. The corresponding LYDL inquiry identity is LYDL-A030 Type C, with the complete KA030CP0 reference retained to distinguish it from other contact designs.

Dimensions · Reference loads · Model comparison · FAQ

KA030CP0 thin section bearing dimensions

Parameter	Symbol	in	mm
Bore diameter	d	3	76.2
Outside diameter	D	3.5	88.9
Axial width	B	0.25	6.35
Radial section	(D − d) / 2	0.25	6.35

Resolving a nominal 75 mm replacement request

A maintenance record that calls this bearing approximately 75 mm should be checked against the original part marking and drawing. The actual three-inch bore is 76.2 mm. Rounding away that difference changes the shaft interface and can conceal an incorrect replacement selection. Similarly, the 88.9 mm outside diameter is not an 89 mm nominal metric seat. Record the measured condition separately from the catalog dimension, especially if the old ring has been removed from a worn housing. A replacement investigation should establish whether the seat, bearing or both caused the observed looseness.

Kaydon KA030CP0 reference load ratings

Reference rating	lbf	kN (converted)
Dynamic radial — Kaydon method	487	2.166
Dynamic radial — ISO comparison	1,166	5.187
Static radial	990	4.404

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-A030 Type C	Supply inquiry identity
Kaydon	KA030CP0	Open radial-contact reference
Silverthin	SA030CP0	Same nominal size and contact family
INA / Schaeffler	CSCA030	CSC catalog radial-contact reference

KA030CP0, SA030CP0 and CSCA030 identify brand-specific references for the 3 × 3.5 × 0.25 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 KA030CP0, 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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Compact measuring rollers and supported shafts

A radial bearing of this envelope can be considered for a compact shaft or measuring roller where space around the shaft is limited. Roller pressure, drive tension and any cantilevered load should be resolved into bearing reactions. The workpiece contact force is not necessarily equal to the load at each support. For a measuring mechanism, clarify whether accuracy is assessed during continuous movement, reversal or stationary positioning. These are different acceptance conditions. The example is intended to guide an engineering discussion and does not represent a verified application or a stated performance level for the offered LYDL 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)
KA030CP0	3	3.5	0.25
KA025CP0	2.5	3	0.25
KA035CP0	3.5	4	0.25
KB030CP0	3	3.625	0.3125

The neighboring KA025CP0 and KA035CP0 references bracket the three-inch bore in half-inch steps. KB030CP0 keeps the shaft size but extends the outside diameter to 92.075 mm. This makes it a section-change study rather than a direct replacement in the original outer seat. Compare the installation dimensions of KA025CP0, KA035CP0, KB030CP0. Explore the open Type C size table and radial-contact bearing category. For another contact arrangement, see the KA030XP0 four-point contact reference.

Separate wear diagnosis from bearing substitution

Inspect the seating surfaces and document their condition before selecting a tighter bearing fit as a corrective action. An oval or damaged housing cannot be evaluated from its average diameter alone. Thin rings respond to their supports, making the support geometry relevant to assembled running behavior. During receipt inspection, keep inch dimensions and metric conversions in separate columns. Use the approved tolerances rather than a rounded purchasing description. Report any discrepancy against the exact product identification and drawing revision so the bearing and the mounting parts can be checked together.

Inspection, handling and packing

When a replacement travels to a maintenance team, label the package with the complete CP0 reference and radial-contact designation. That reduces confusion with a same-sized Type X ring already held in stores. Preserve the protective wrapping until installation rather than leaving the open raceway exposed on a workbench.

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

Questions about this model

Why does a three-inch bearing measure 76.2 mm rather than 75 mm?

An inch equals exactly 25.4 mm, giving a three-inch nominal bore of 76.2 mm. The difference is a unit-system distinction, not a bearing tolerance or a reason to round the order dimension.

Does a loose old housing mean I should specify less bearing clearance?

Not by itself. Housing wear and internal bearing clearance are different issues. Measure and evaluate the seat condition before changing the bearing specification; an internal adjustment does not restore a damaged support surface.

What changes between KA025CP0 and KA030CP0?

The bore grows from 63.5 to 76.2 mm and the outside diameter from 76.2 to 88.9 mm. Both bearings remain 6.35 mm wide, so shaft and housing diameters change while the bearing’s nominal axial width stays constant.

Can the load table predict my measuring roller’s accuracy?

Load ratings address capacity under defined assumptions. They do not specify roller runout, sensor error or elastic displacement in your frame. State those performance requirements separately from the radial load.

Which identity should appear on a maintenance purchase order?

Use LYDL-A030 Type C and KA030CP0 reference, plus the agreed drawing or configuration. A short entry such as A030 omits the contact arrangement and may leave the replacement specification ambiguous.

Request a quote for KA030CP0

Include “LYDL-A030 Type C, KA030CP0 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.