Thrust ball bearings 51100 series (51100 to 51130): bore, outside diameter, height, housing washer bore + STEP/STL envelopes — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/thrust-ball-bearings-51100-series/ (sheet CC BY 4.0) Basis: Emerson Bearing 51100-series table, agreeing with Nachi and McMaster-Carr's open thrust ball bearings; housing washer bore from NSK-based tables (TFL, Nachi, SKDIN); McMaster-Carr linked for CAD Catalog version: 2026-10-20 Sizes: see table below - 51100-series single-direction thrust ball bearings: two flat washers with a ball-and-cage set between them; they take axial load one way only. The shaft washer (tight bore d) turns with the shaft, the housing washer (looser bore, listed) stays still and sits against a shoulder. 51100 = 10 mm bore, 51101 = 12, 51102 = 15, 51103 = 17, then bore = last two digits × 5 (51105 = 25 mm) from 51104. They are used under lead screws, vertical axes and swivel bearings. - Numbers: Emerson Bearing's 51100-series table for d, D and T; Auburn Bearing agrees on every row except 51102, where Auburn prints 32 × 12, which is the 51202 size; it is not used. Nachi's catalogue agrees from 51100 to 51110. McMaster-Carr's open thrust ball bearings give 50 × 70 × 14 (51110) and 100 × 135 × 25 (51120), equal to the table. The housing-washer bore (the NSK-based table on TFL Bearing, Nachi and SKDIN's 51101 page agree) is given for 51100 to 51110; for the larger sizes no source was read. The shaft washer OD equals D (SKDIN 51101: 26). Chamfer r min: 0.3 for 51100 to 51104, 0.6 for 51105 to 51110 (Nachi / TFL). - Files: 11 envelopes (51100 to 51110): a single ring bore d, OD D, height T. The washers' individual thicknesses, the ball and cage are not published in these tables, so the envelope is one plain ring and is labelled so. - Left out: the 51200 / 51300 / 51400 series (different heights), double-direction 52xxx, aligning washers (53xxx), load ratings, speed limits, 51132 and larger. bearing shaft washer bore d, mm outside Ø D, mm height T, mm housing washer bore, mm chamfer r min, mm 51100 10 24 9 11 0.3 51101 12 26 9 13 0.3 51102 15 28 9 16 0.3 51103 17 30 9 18 0.3 51104 20 35 10 21 0.3 51105 25 42 11 26 0.6 51106 30 47 11 32 0.6 51107 35 52 12 37 0.6 51108 40 60 13 42 0.6 51109 45 65 14 47 0.6 51110 50 70 14 52 0.6 51111 55 78 16 — — 51112 60 85 17 — — 51113 65 90 18 — — 51114 70 95 18 — — 51115 75 100 19 — — 51116 80 105 19 — — 51117 85 110 19 — — 51118 90 120 22 — — 51120 100 135 25 — — 51122 110 145 25 — — 51124 120 155 25 — — 51126 130 170 30 — — 51128 140 180 31 — — 51130 150 190 31 — — Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - Emerson Bearing: 51100 series thrust ball bearings: d, D, T, 51100 to 51130 — web — Publisher's page; dimensions are facts — https://products.emersonbearing.com/printitems/ball-thrust-ball-bearings/51100-series-ball-thrust-ball-bearings?plpver=10 - Auburn Bearing: 51100 metric thrust ball bearing series: bore, OD, height (the 51102 row there is the 51202 size and is not used) — web — Publisher's page; dimensions are facts — https://auburnbearing.com/thrust-bearings/51100-series/ - NACHI (via AIMS Industrial): Thrust ball bearings 51100: d, D, T, r min for 51100 to 51110 (catalogue p.173-175) — web — Publisher's page; dimensions are facts — https://aimsindustrial.com.au/cdn/shop/files/NACHI-Bearings-Catalogue-Pages-173-174-175.pdf - TFL Bearing (NSK table): Thrust ball bearings of the series 511: d, D, T, r min, shaft washer OD, housing washer bore — web — Publisher's page; dimensions are facts — https://tflbearing.com/products/ball-bearings/thrust-ball-bearings-of-the-series-511 - SKDIN (distributor): 51101: d 12, D 26, H 9, housing washer bore 13, shaft washer OD 26, r 0.3 — web — Publisher's page; dimensions are facts — https://www.skdin.com/products/productid-51101 - McMaster-Carr: Open thrust ball bearings (free STEP/IGES per part, for your own design use; no redistribution) — STEP, IGES, PDF — McMaster-Carr site terms: personal design use, no redistribution [verify license at link] — https://www.mcmaster.com/open-thrust-ball-bearings Free files (CC BY 4.0, Xem Studio; STEP + STL, 11 parts): https://xemstudio.com/files/hardware/thrust-ball-bearings-51100-series/index.json API: https://xemstudio.com/api/geometry?object=thrust-ball-bearings-51100-series