Cylindrical roller bearings NU2xx and NU3xx (NU205, NU206, NU208, NU305, NU310 and more): bore, OD, width, r, Fw + 18 ring-envelope STEP/STL files

sizes

37 in table

Notes

• NU is the single-row cylindrical roller bearing with two ribs on the outer ring and a plain inner ring: it takes heavy radial load and lets the shaft float axially, so it sits in gearboxes, electric motors and machine-tool spindles. NU2xx is the 02 dimension series (same bore, OD and width as a 72xx angular-contact bearing) and NU3xx the 03 series (same as 73xx).
• Numbers: Koyo (JTEKT) cylindrical roller bearing catalogue pages (NU204 to NU216, NU304 to NU315: d, D, B, r, r1 and Fw), with Emerson Bearing's NU2xx E list as the independent check on d, D and B for every NU2xx row. NU3xx is checked against Emerson's 73xx angular-contact list, which has the same 03-series bore, OD and width on every row, and NU2xx against the 72xx list likewise. Emerson's NU202 to NU230 rows give d, D, B only; the Koyo rows used are the plain NU (the 'R' versions, e.g. NU205R, have a smaller Fw and are not used).
• Fw is the diameter of the inscribed circle of the rollers on the inner ring (the inner ring raceway diameter); the matching Ew on the outer ring is not in the tables read. r min is the smallest allowed chamfer, r1 min the rib-face chamfer; the envelope files round all four corners at r min.
• Files: 18 ring envelopes (NU204 to NU212 and NU304 to NU312): one solid ring, bore d, OD D, width B, corners rounded at r min. No rollers, cage, ribs or raceway steps.
• Left out: the 22 and 23 series (NU2204, NU2304 and the NU32xx / NU33xx rows in the Koyo pages), the NJ, NUP, N, NF types, 'R' and 'E' variants, NU217 and larger with r (Koyo pages read stop at NU216 for series 2 and NU315 for series 3), loads and speeds, inch sizes.

Cylindrical roller bearings NU2xx and NU3xx (NU205, NU206, NU208… size chart

Mating features

Drawn at the exact size. Open press, slide, run and socket features by your process's clearance (tolerances by process); leave designed gaps and clamp fits as drawn.

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

Free files

★ Free files 18 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json

Plain text: sheet.txt · JSON: /api/geometry?object=cylindrical-roller-bearings-nu2xx-nu3xx

Fits with

Free

Angular contact ball bearings 7200 B and 7300 B (7205B, 7206B, 7305B and more): bore, OD, width, r, r1 + 23 ring-envelope STEP/STL files50 sizes★ 23 filesFree

Spherical roller bearings 222xx and 223xx (22205, 22206, 22208, 22210, 22308 and more): bore, OD, width, r + 13 ring-envelope STEP/STL files50 sizes★ 13 filesFree

Tapered roller bearings, metric (30203 to 32328, ISO 355): bore, OD, T, B, C and chamfer r, 15 to 140 mm (302xx, 303xx, 320xx, 322xx, 323xx, 329xx)131 sizes★ sheetFree

HK needle roller bearings (drawn cup): HK0306 to HK2020 bore, outside diameter and width + STEP/STL envelopes26 sizes★ 8 filesFree

Ball bearings, 683 to 6210 and flanged F6xx (ISO 15)44 sizes★ 44 filesFree

Deep-groove ball bearings, series 60, 62, 63, 68 and 69: 6000 to 6310 (ISO 15)55 sizes★ 55 filesFree

Radial shaft seals / oil seals, DIN 3760 and ISO 6194-1 sizes: shaft d × bore D × width b (6 × 16 × 7 to 480 × 530 × 25) + case envelopes92 sizes★ 51 filesFree

Retaining rings DIN 472 (internal, for bores): ring dimensions and groove diameter d2 × width m, 8 to 110 mm41 sizes★ 11 files