SKF 81102 TN complete cylindrical roller thrust bearing — the full three-piece assembly ready for drop-in installation. COMPLETE bearing = shaft washer (WS 81102) + cylindrical-roller-and-cage assembly (K 81102 TN) + housing washer (GS 81102) — verified from SKF product page and Acorn Bearings / Amazon SKF listings. Single-direction axial-load design (takes axial thrust in ONE direction only — install the shaft washer against the shaft flange or shoulder that transmits thrust; the housing washer against the fixed housing face). Verified dimensions and load ratings (SKF product data via RS Components 0513884): bore d = 15 mm, outside diameter D = 28 mm, height H = 9 mm (complete assembly), dynamic load rating C = 11.2 kN, static load rating C0 = 27 kN, limiting reference speed 8,500 r/min under grease lubrication. (Fatigue load Pu, oil-lube limiting speed and mass are not surfaced from the primary SKF page in this reference; verify against the current SKF product page for a specific engineering RFQ.) 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 specific SKF 811xx product page). MP suffix denotes a machined-brass cage (window-type) for higher continuous temperature or oil-additive incompatibility with PA66. Component construction: shaft washer WS 81102 and housing washer GS 81102 are hardened carbon-chromium bearing steel with precision-ground raceways (Acorn Bearings-verified 15 x 28 x 2.75 mm for WS; 16 x 28 x 2.75 mm for GS). The K 81102 TN cage-and-roller assembly alone (roller-and-cage, no washers, height ~3.5 mm) is a separate SKF part number — see our SKF K 81102 TN product page for that variant. SKF sells the complete 81102 TN as one line-item AND the three components (K / WS / GS) as separately-orderable spares, so a user can either drop in the full assembly for a new installation or replace only the worn component in a rebuild. APPLICATION correctly framed: single-direction axial-load bearing for gearbox output-shaft thrust take-up, worm-gear output shafts, small hydraulic-cylinder end stops, screw-jack thrust ends, machine-tool spindle end thrust, marine gear thrust arrangements, and vertical-shaft support where the thrust direction is always the same. NOT for reversing-thrust service (that requires two 81102 TN bearings back-to-back, or a two-directional design such as a spherical roller thrust bearing). NOT for applications requiring misalignment compensation (that requires a sphered-seat housing plus a matched sphered seat washer — not a stock SKF K-prefixed 811xx variant). Cross-reference to other bearing makers (dimensional / ISO 104 boundary-dimension equivalence — load ratings vary +/- 10-30 percent by maker per each's ISO 281 a_ISO factor): FAG / INA 81102-TV (15 x 28 x 9 mm, thermoplastic cage TV equivalent to SKF TN); NSK 81102 TN; NTN 81102 T2 (steel cage T2 alternative in NTN's system); Timken T102 (Timken's cylindrical roller thrust naming uses T-prefix, T102 = 15 mm bore equivalent to SKF 81102); Koyo 81102. NOTE: cross-maker interchange holds dimensionally per ISO 104 fixed boundary dimensions (15/28/9 mm) — load ratings and cage material differ; verify per-maker datasheet for critical applications. Complete SKF 811xx TN size range (per SKF General Rolling Bearings catalogue online): 81102 TN (15 mm bore, this product), 81103 TN (17), 81104 TN (20), 81105 TN (25), 81106 TN (30), 81107 TN (35), 81108 TN (40), 81109 TN (45), 81110 TN (50), 81111 TN (55), 81112 TN (60), 81113 TN (65), 81114 TN (70), 81115 TN (75), 81116 TN (80), 81117 TN (85), 81118 TN (90), 81120 TN (100), 81122 TN (110), 81124 TN (120), 81126 TN (130), 81128 TN (140), 81130 TN (150), 81132 TN (160), 81134 TN (170), 81136 TN (180), 81138 TN (190), 81140 TN (200 mm bore). Medium-section 81200 TN and heavy-section 89400 range exist for higher load ratings at the same bore. Related cBallast SKUs: K 81102 TN (roller-and-cage assembly alone for compact between-hardened-surfaces installations); WS 81102 (shaft washer alone for rebuild); GS 81102 (housing washer alone for rebuild). See our companion 'SKF 81xxx Cylindrical Roller Thrust Bearing Reference' document for the full 81100 / 81200 / 89400 series data across the bore range 15-200 mm plus cross-maker interchange to FAG, NSK, NTN, Timken and Koyo. IMPORTANT: that reference document's per-row load-rating table may need row-by-row verification against current SKF product pages for a specific engineering RFQ — dimensional data is ISO 104 fixed and reliable; per-manufacturer C and C0 values should be confirmed. cBallast supplies the full SKF 811xx / 812xx / 89400 range plus K, WS and GS component spares ex-EU stock. Request a quote by SKF designation (81102 TN for complete bearing, K 81102 TN for cage-and-roller-only, WS 81102 for shaft-washer-only, GS 81102 for housing-washer-only), preferred cross-reference (FAG / NSK / NTN / Timken / Koyo), and application context (single-direction thrust take-up vs specific gearbox / machine-tool / marine service).