# HK needle roller bearings (drawn cup): HK0306 to HK2020 bore, outside diameter and width + STEP/STL envelopes > What are the dimensions of HK0808, HK1010, HK1212, HK1616 and HK2020 drawn-cup needle roller bearings: bore, outside diameter and width? - Category: Hardware › Bearings, rails & motion - Kind: Standard part - Basis: Emerson Bearing HK series list, with Motion Industries (HK1212), Reliance (HK1616) and Kramp (HK2010) cross-checks; McMaster-Carr linked for CAD - Page: https://xemstudio.com/objects/needle-roller-bearings-hk-series/ · JSON: https://xemstudio.com/api/geometry?object=needle-roller-bearings-hk-series · Plain text: https://xemstudio.com/objects/needle-roller-bearings-hk-series/sheet.txt - License: dimension sheet CC BY 4.0 (Xem Studio); files CC BY 4.0 or their publisher's license - Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/) **Exact dimensions.** Every file is drawn at true size with no tolerance added. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your process's clearance before making the part. ## Notes - HK bearings are drawn-cup needle roller bearings, open at both ends: a thin hardened steel cup with a full set of needles inside. There is no inner ring: the needles run on the shaft, so the shaft is the raceway and must be hard and ground (the hardness is not in these tables). The cup is pressed into a bore of tight tolerance. Designation: HK + Fw (2 digits) + B (2 digits): HK0810 = 8 mm bore, 10 mm wide; HK1616 = 16 mm bore, 16 mm wide. Fw is the shaft size the bearing is made for. - Numbers: Emerson Bearing's HK list for Fw × D × B (24 rows read, 64 total on the page); HK1212 is confirmed by Motion Industries and HK1616 by Reliance; HK2010 is Kramp's (20 × 26 × 10) and HK2020 is Emerson's HK2020 page. The designations are asserted against their digits. Emerson's HK0306 / HK0408 rows carry a 'TN' suffix on the source site; the base designation is used. A source row labelled HK1215 (12 × 16 × 10) is a mislabel: 12 × 16 × 10 is HK1210, so the row was dropped. - Files: 8 envelopes (HK0608, 0808, 1010, 1212, 1512, 1616, 2010, 2020) as one plain tube bore Fw, OD D, width B. The cup wall, needles, lip radius and lubricating holes are not in the tables, so they are not drawn. Fw is a nominal inscribed diameter, not a machined hole: the shaft is the real inner surface. - Left out: the HK..RS (sealed) and HK..B (closed end) variants, the BK closed-end series, shaft and housing tolerance tables (not read), load ratings, inch sizes. ## Mating features (exact size; open press / slide / run / socket by your process clearance, leave designed and clamp as drawn) | feature | exact | mates with | fit | files | |---|---|---|---|---| | bore Fw | Ø8 to Ø20 (HK0808 to HK2020 files) | hardened ground shaft of the same nominal diameter: the shaft is the raceway | run | HK* | | outside Ø D | Ø12 to Ø26 | housing bore of the same nominal diameter (the cup is pressed in) | press | HK* | ## Sizes | bearing | bore (roller inscribed circle) Fw, mm | outside Ø D, mm | width B, mm | |---|---|---|---| | HK0306 | 3 | 7 | 6 | | HK0408 | 4 | 8 | 8 | | HK0509 | 5 | 9 | 9 | | HK0608 | 6 | 10 | 8 | | HK0609 | 6 | 10 | 9 | | HK0709 | 7 | 11 | 9 | | HK0808 | 8 | 12 | 8 | | HK0810 | 8 | 12 | 10 | | HK0908 | 9 | 13 | 8 | | HK0910 | 9 | 13 | 10 | | HK0912 | 9 | 13 | 12 | | HK1010 | 10 | 14 | 10 | | HK1012 | 10 | 14 | 12 | | HK1015 | 10 | 14 | 15 | | HK1212 | 12 | 18 | 12 | | HK1312 | 13 | 19 | 12 | | HK1412 | 14 | 20 | 12 | | HK1512 | 15 | 21 | 12 | | HK1516 | 15 | 21 | 16 | | HK1522 | 15 | 21 | 22 | | HK1612 | 16 | 22 | 12 | | HK1616 | 16 | 22 | 16 | | HK1622 | 16 | 22 | 22 | | HK1712 | 17 | 23 | 12 | | HK2010 | 20 | 26 | 10 | | HK2020 | 20 | 26 | 20 | ## Where the files are - Emerson Bearing: [HK style standard needle roller bearings (drawn cup, open ends): Fw, D, B, HK0306 to HK1712](https://products.emersonbearing.com/viewitems/standard-needle-roller-bearings/hk-style-standard-needle-roller-bearings?plpver=30) — web — Publisher's page; dimensions are facts - Emerson Bearing: [HK2020: Fw 20, D 26, B 20](https://products.emersonbearing.com/printitem/standard-needle-roller-bearings/hk-style-standard-needle-roller-bearings/hk2020?plpver=10) — web — Publisher's page; dimensions are facts - Motion Industries: [HK1212 (INA-series HK, open ends): 12 x 18 x 12](https://www.motion.com/products/sku/00127513) — web — Publisher's page; dimensions are facts - Reliance: [INA HK1616 open-end drawn cup needle bearing: 16 x 22 x 16](https://reliance.ie/en-ie/bearings/ina-drawn-cup-needle-roller-bearing-open-end-hk1616) — web — Publisher's page; dimensions are facts - Kramp: [HK2010B: Fw 20, D 26, C 10, open ends](https://kramp.com/shop-bg/en/p/cup-needle-roller-bearing--HK2010B) — web — Publisher's page; dimensions are facts - McMaster-Carr: [Needle bearings (free STEP/IGES per part, for your own design use; no redistribution)](https://www.mcmaster.com/needle-bearings) — STEP, IGES, PDF — McMaster-Carr site terms: personal design use, no redistribution (verify at link) ## Free STEP/STL (8 parts, CC BY 4.0, Xem Studio) Index: https://xemstudio.com/files/hardware/needle-roller-bearings-hk-series/index.json - HK0608-drawn-cup-needle-bearing-envelope-6x10x8: [STEP](https://xemstudio.com/files/hardware/needle-roller-bearings-hk-series/HK0608-drawn-cup-needle-bearing-envelope-6x10x8.step) · [STL](https://xemstudio.com/files/hardware/needle-roller-bearings-hk-series/HK0608-drawn-cup-needle-bearing-envelope-6x10x8.stl) — HK0608 drawn-cup needle roller bearing envelope: needle-circle (inscribed) bore Fw 6, outside Ø10, width 8; one plain tube (cup wall, rollers and the rounded lips are not separated); nominal values - HK0808-drawn-cup-needle-bearing-envelope-8x12x8: [STEP](https://xemstudio.com/files/hardware/needle-roller-bearings-hk-series/HK0808-drawn-cup-needle-bearing-envelope-8x12x8.step) · [STL](https://xemstudio.com/files/hardware/needle-roller-bearings-hk-series/HK0808-drawn-cup-needle-bearing-envelope-8x12x8.stl) — HK0808 drawn-cup needle roller bearing envelope: needle-circle (inscribed) bore Fw 8, outside Ø12, width 8; one plain tube (cup wall, rollers and the rounded lips are not separated); nominal values - HK1010-drawn-cup-needle-bearing-envelope-10x14x10: [STEP](https://xemstudio.com/files/hardware/needle-roller-bearings-hk-series/HK1010-drawn-cup-needle-bearing-envelope-10x14x10.step) · [STL](https://xemstudio.com/files/hardware/needle-roller-bearings-hk-series/HK1010-drawn-cup-needle-bearing-envelope-10x14x10.stl) — HK1010 drawn-cup needle roller bearing envelope: needle-circle (inscribed) bore Fw 10, outside Ø14, width 10; one plain tube (cup wall, rollers and the rounded lips are not separated); nominal values - HK1212-drawn-cup-needle-bearing-envelope-12x18x12: [STEP](https://xemstudio.com/files/hardware/needle-roller-bearings-hk-series/HK1212-drawn-cup-needle-bearing-envelope-12x18x12.step) · [STL](https://xemstudio.com/files/hardware/needle-roller-bearings-hk-series/HK1212-drawn-cup-needle-bearing-envelope-12x18x12.stl) — HK1212 drawn-cup needle roller bearing envelope: needle-circle (inscribed) bore Fw 12, outside Ø18, width 12; one plain tube (cup wall, rollers and the rounded lips are not separated); nominal values - HK1512-drawn-cup-needle-bearing-envelope-15x21x12: [STEP](https://xemstudio.com/files/hardware/needle-roller-bearings-hk-series/HK1512-drawn-cup-needle-bearing-envelope-15x21x12.step) · [STL](https://xemstudio.com/files/hardware/needle-roller-bearings-hk-series/HK1512-drawn-cup-needle-bearing-envelope-15x21x12.stl) — HK1512 drawn-cup needle roller bearing envelope: needle-circle (inscribed) bore Fw 15, outside Ø21, width 12; one plain tube (cup wall, rollers and the rounded lips are not separated); nominal values - HK1616-drawn-cup-needle-bearing-envelope-16x22x16: [STEP](https://xemstudio.com/files/hardware/needle-roller-bearings-hk-series/HK1616-drawn-cup-needle-bearing-envelope-16x22x16.step) · [STL](https://xemstudio.com/files/hardware/needle-roller-bearings-hk-series/HK1616-drawn-cup-needle-bearing-envelope-16x22x16.stl) — HK1616 drawn-cup needle roller bearing envelope: needle-circle (inscribed) bore Fw 16, outside Ø22, width 16; one plain tube (cup wall, rollers and the rounded lips are not separated); nominal values - HK2010-drawn-cup-needle-bearing-envelope-20x26x10: [STEP](https://xemstudio.com/files/hardware/needle-roller-bearings-hk-series/HK2010-drawn-cup-needle-bearing-envelope-20x26x10.step) · [STL](https://xemstudio.com/files/hardware/needle-roller-bearings-hk-series/HK2010-drawn-cup-needle-bearing-envelope-20x26x10.stl) — HK2010 drawn-cup needle roller bearing envelope: needle-circle (inscribed) bore Fw 20, outside Ø26, width 10; one plain tube (cup wall, rollers and the rounded lips are not separated); nominal values - HK2020-drawn-cup-needle-bearing-envelope-20x26x20: [STEP](https://xemstudio.com/files/hardware/needle-roller-bearings-hk-series/HK2020-drawn-cup-needle-bearing-envelope-20x26x20.step) · [STL](https://xemstudio.com/files/hardware/needle-roller-bearings-hk-series/HK2020-drawn-cup-needle-bearing-envelope-20x26x20.stl) — HK2020 drawn-cup needle roller bearing envelope: needle-circle (inscribed) bore Fw 20, outside Ø26, width 20; one plain tube (cup wall, rollers and the rounded lips are not separated); nominal values ## Questions **What size is an HK0808 needle bearing?** 8 mm bore, 12 mm OD, 8 mm wide. **What size is an HK1616?** 16 mm bore, 22 mm OD, 16 mm wide. **What do the numbers in HK1010 mean?** 10 mm bore (Fw) and 10 mm width B; the OD is 14 mm. **Does an HK needle bearing have an inner ring?** No: the needles run directly on a hardened, ground shaft. ## Fits with - [Ball bearings, 683 to 6210 and flanged F6xx (ISO 15)](https://xemstudio.com/objects/ball-bearings-metric/) - [Thrust ball bearings 51100 series (51100 to 51130): bore, outside diameter, height, housing washer bore + STEP/STL envelopes](https://xemstudio.com/objects/thrust-ball-bearings-51100-series/) - [Deep-groove ball bearings, series 60, 62, 63, 68 and 69: 6000 to 6310 (ISO 15)](https://xemstudio.com/objects/deep-groove-ball-bearings-series/) - [Linear shafts Ø3 to Ø25 mm (h6), 100 to 1000 mm long](https://xemstudio.com/objects/linear-shafts-h6/) - [Plain / sintered bushings ISO 2795: bore, outside diameter, thin series and length options (1 to 60 mm) + STEP/STL sleeves](https://xemstudio.com/objects/sintered-bushings-iso-2795/) - [Pillow block KP08 envelope with a 608 pocket](https://xemstudio.com/objects/pillow-block-kp08/)