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

KC040CP0 Thin Section Bearing Reference – Open Type C

KC040CP0 thin section bearing reference: LYDL-C040 Type C, open radial-contact thin section bearing.
Nominal d × D × B: 4 × 4.75 × 0.375 in (101.6 × 120.65 × 9.525 mm).
KC family with 0.375-inch radial section and axial width; housing and retainers require separate space.
Four-inch radial contact in a three-eighths-inch section.
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.

Four-inch radial contact in a three-eighths-inch section

The KC040CP0 thin section bearing reference has a 101.6 mm bore, 120.65 mm outside diameter and 9.525 mm width in an open Type C design. It is identified for LYDL inquiries as LYDL-C040 Type C. The KC section provides a distinct installation envelope from the KA and KB four-inch sizes.

Dimensions · Reference loads · Model comparison · FAQ

KC040CP0 thin section bearing dimensions

Parameter	Symbol	in	mm
Bore diameter	d	4	101.6
Outside diameter	D	4.75	120.65
Axial width	B	0.375	9.525
Radial section	(D − d) / 2	0.375	9.525

Two different meanings of C in the designation

The C in the KC family identifies the reference section, while the C following the size digits identifies radial contact. They should not be combined into a vague description such as C bearing. Keeping the complete KC040CP0 code alongside open Type C helps distinguish section size from contact arrangement. The 3/8-inch radial section gives a 19.05 mm difference between outer and inner diameters. Axial width is only 9.525 mm, because radial section is measured on one side of the ring. This distinction avoids doubling the width when translating a cross-section sketch into a housing drawing.

Kaydon KC040CP0 reference load ratings

Reference rating	lbf	kN (converted)
Dynamic radial — Kaydon method	1,073	4.773
Dynamic radial — ISO comparison	2,321	10.324
Static radial	2,100	9.341

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-C040 Type C	Supply inquiry identity
Kaydon	KC040CP0	Open radial-contact reference
Silverthin	SC040CP0	Same nominal size and contact family
INA / Schaeffler	CSCC040	CSC catalog radial-contact reference

KC040CP0, SC040CP0 and CSCC040 identify brand-specific references for the 4 × 4.75 × 0.375 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 KC040CP0, 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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Radial load review for a compact geared shaft

A gear-driven shaft can impose radial and axial forces depending on the gear arrangement. List both components and their locations instead of calling the entire duty radial because a Type C bearing is being considered. If thrust is significant, the contact-type selection and arrangement deserve a separate review. A compact geared mechanism is a possible application context rather than a confirmed installation. The housing, shaft, gear alignment and lubricant system all affect suitability. Provide the actual force components and desired life so the bearing can be assessed as part of the mechanism.

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)
KC040CP0	4	4.75	0.375
KA040CP0	4	4.5	0.25
KB040CP0	4	4.625	0.3125
KC050CP0	5	5.75	0.375

The KA and KB rows illustrate smaller sections around the same 101.6 mm shaft. KC050CP0 keeps the 9.525 mm section but moves to a five-inch bore. Use the comparison to identify whether the design change concerns section, shaft size or both. Compare the installation dimensions of KA040CP0, KB040CP0, KC050CP0. Explore the open Type C size table and radial-contact bearing category. For another contact arrangement, see the KC040XP0 four-point contact reference.

Shoulder geometry and gear alignment

Support the ring with geometry defined by the approved product drawing. A shoulder or fillet that intrudes into a bearing corner can prevent proper seating even when the bore and outer diameter match. Check the contact surfaces before blaming an alignment discrepancy on bearing accuracy. Define assembled gear alignment separately from the bearing acceptance criteria. Bearing dimensions, shaft straightness, housing coaxiality and mounting faces contribute to the result. The brand-reference table establishes a comparison starting point, not an identical accuracy guarantee across suppliers.

Inspection, handling and packing

Protect the 3/8-inch section from contact with loose gears or shafts during shipment. Separate heavy components and retain the full KC040CP0 radial-reference label so it cannot be confused with a same-bore bearing of another section or contact type.

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 KC040CP0 contain two C characters?

They occupy different positions in the reference naming system. The family letter identifies the three-eighths-inch section, while the contact-type letter identifies radial contact. Retain the full code to avoid mixing those meanings.

Is the 19.05 mm diameter difference the bearing width?

No. It is twice the radial section. Both the nominal radial section on one side and the axial width are 9.525 mm for this KC reference.

Can a helical-gear shaft be selected from radial force alone?

The axial force generated by the gear arrangement also needs evaluation, along with load locations and support spacing. A radial-contact label does not remove thrust from the actual machine load case.

What can prevent seating even when both diameters match?

A shoulder fillet, burr, contamination or incorrect support face can interfere with seating. Check the approved corner and shoulder geometry as well as the nominal diameters before final assembly.

Does CSCC040 imply the same accuracy as KC040CP0?

The INA / Schaeffler catalog name identifies a comparable nominal radial-contact envelope. Accuracy, clearance and other configuration details require their own comparison; similar dimensions do not establish identical performance grades.

Request a quote for KC040CP0

Include “LYDL-C040 Type C, KC040CP0 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.