SKF K 81102 TN cylindrical roller thrust bearing ASSEMBLY (roller-and-cage only — no washers). IMPORTANT — in SKF nomenclature the K prefix on the 811xx / 812xx cylindrical roller thrust series denotes the ROLLER-AND-CAGE ASSEMBLY on its own: cylindrical rollers held in a glass-fibre-reinforced PA66 polyamide cage (TN suffix), with NO shaft washer and NO housing washer supplied. The complete bearing is 81102 TN (no K prefix) and consists of the K assembly + the shaft washer WS 81102 + the housing washer GS 81102 — SKF sells all three parts SEPARATELY so the operator can either (a) install the K assembly directly between adjacent shaft-and-housing surfaces that are already machined and hardened to serve as raceways (a compact axial-carry design that minimises section height), or (b) combine K + WS + GS into a complete drop-in 81102 TN bearing (15 x 28 x 9 mm full assembly). K 81102 TN verified dimensions: bore d = 15 mm, outside diameter D = 28 mm, assembly height H ~3.5 mm (K roller-and-cage alone, NOT the full 9 mm the complete bearing measures). Companion parts SKF publishes as separate spares: WS 81102 shaft washer — 15 x 28 x 2.75 mm, hardened carbon-chromium bearing steel with precision-ground raceway; GS 81102 housing washer — 16 x 28 x 2.75 mm, hardened bearing steel. Verified load ratings for the FULL 81102 TN bearing (K + WS + GS installed, from SKF product data via RS Components): dynamic C = 11.2 kN, static C0 = 27 kN, limiting reference speed 8,500 r/min under grease lubrication. (Fatigue load Pu, oil-lube limiting speed, and bearing mass are not surfaced from the primary SKF page in this reference — request from SKF product page for the specific application.) TN suffix: glass-fibre-reinforced PA66 polyamide cage — SKF-standard temperature service commonly cited as ~120 C continuous (industry norm for PA66-GF; verify against the SKF 811xx product page for the specific application). MP suffix denotes a machined-brass cage (window-type) used where higher continuous temperature or oil-additive incompatibility with PA66 is a concern; MP is the higher-service upgrade path. Cross-reference to other bearing makers: FAG / INA K 81102-TV (also cataloged as K81102-TV-A/0-8), 15 x 28 x 3.5 mm, with slightly different published ratings C = 14.4 kN, C0 = 28.5 kN per INA/RS listing (differences of ~10-30% between bearing makers on the same-size bearing are normal — each maker's ISO 281 life-modification factor a_ISO differs). TV = thermoplastic cage, functionally equivalent to SKF TN. For NSK, NTN, Koyo and Timken K-prefixed 81102 references the roller-and-cage-assembly convention is generally consistent across FAG/INA and SKF, but the exact NSK / NTN / Koyo / Timken designations should be confirmed against each manufacturer's current product page before ordering. SKF 811xx K-range verified catalogue presence (from web search): K 81102, K 81107, K 81108, K 81110, K 81112, K 81114, K 81116, K 81120, K 81124, K 81134 TN. Additional sizes K 81103, K 81104, K 81105, K 81106, K 81109, K 81111, K 81113, K 81115, K 81117, K 81118, K 81122, K 81126, K 81128, K 81130, K 81132, K 81136, K 81138, K 81140 TN are expected to be in the SKF catalogue by the family's completeness, but NOT independently verified for stock status in this pass. Applications for the K roller-and-cage assembly (correctly framed): single-direction axial-load carry between adjacent hardened surfaces in COMPACT axial designs — gearbox thrust take-up between hardened housing bosses, small hydraulic-cylinder end stops, screw-jack thrust ends, machine-tool spindle end-thrust bearings, marine gear thrust bearings where axial section height must be minimised (e.g. propeller-shaft rear-thrust arrangements). Explicitly NOT for applications requiring misalignment compensation — the K variant does not provide self-alignment. If the housing bore cannot be machined perpendicular to the shaft axis within 0.001 rad (roughly 0.06 degrees), the correct SKF path is a sphered housing seat + separately-ordered sphered seat washer, NOT a K-prefix bearing. For 53xxx thrust ball series the sphered seat washer is the SKF U-family (U 202, U 320 designation). For the 811xx cylindrical roller thrust series the sphered-seat solution is application-specific and not carried as a stock K-variant. Related cBallast SKUs and RFQ path: for a full complete 15 x 28 x 9 mm drop-in bearing, order 81102 TN (K + WS + GS in one line). For a compact between-hardened-surfaces installation, order K 81102 TN alone. For replacement of the individual washer only, order WS 81102 or GS 81102 as needed. See our companion "SKF 81xxx Cylindrical Roller Thrust Bearing Reference" document for the full 81100 / 81200 / 89400 series data (dimensional and load reference across bore range 15-200 mm) and cross-maker interchange to FAG, NSK, NTN, Timken and Koyo. Note: that reference document's 811xx per-row load table should be treated as approximate — SKF-verified per-product data on the current SKF product page is the authoritative source for any specific RFQ. cBallast supplies the SKF K 811xx TN cage-and-roller assembly range plus matched WS shaft washers, GS housing washers, and complete 811xx TN bearings ex-EU stock. Request a quote by SKF designation (K 81102 TN vs full 81102 TN vs WS 81102 vs GS 81102), the target installation (compact between-hardened-surfaces vs full drop-in bearing), and interchange preference (SKF vs FAG K81102-TV vs equivalent maker).