Cross-brand designation analysis
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Same-model Comparison
Explore products that share a base designation across loaded brands, with dimensional agreement and data gaps shown clearly.
Automatic candidate selection
One base designation across loaded brands
Exact designations rank first. Dimensions, suffixes and other technical differences remain visible so the result is not mistaken for an interchangeability declaration.
Data incomplete
“NK21” across 3 loaded brands
The base designation is shared, but too few brands have complete boundary dimensions. Use Custom Compare when you want to choose exact suffix variants yourself.
Technical comparison
Choose exact variants instead →Brand differences at a glance
| Parameter | SKFNK 21/16Single row needle roller bearing with machined rings, with flanges, without inner ring | INANK21/16-XL21 × 29 × 16 mm | KOYONK21/16Needle roller bearings |
|---|---|---|---|
| Comparable specifications | |||
| Brand | SKF | INA | KOYO |
| Designation | NK 21/16 | NK21/16-XL | NK21/16 |
| Product family | Needle roller bearings | — | Heavy-duty needle roller bearings / Metric series, caged, without inner ring |
| Detailed type | Single row needle roller bearing with machined rings, with flanges, without inner ring | Needle roller bearings | Needle roller bearings |
| Series | — | NK21/16 | — |
| Bore diameterd | — | 21 mm | — |
| Outside diameterD | 29 mm | 29 mm | 29 mm |
| WidthB | 16 mm | 16 mm | — |
| Basic dynamic load ratingC | 13.8 kN | 15.2 kN | 15.3 kN |
| Basic static load ratingC0 | 20.4 kN | 18.7 kN | 21.6 kN |
| Fatigue load limitPu | 2.45 kN | 3.5 kN | 3.3 kN |
| Reference speednref | 19000 r/min | 12600 r/min | — |
| Limiting speednG | 22000 r/min | 20600 r/min | 14000 r/min |
| Mass≈m | 0.028 kg | 0.0282 kg | 0.032 kg |
| Sealing | Without | — | — |
| Cage | Sheet steel | — | — |
| Bearing material | Bearing steel | — | — |
| Lubricant | None | — | — |
| Minimum operating temperatureTmin | — | -30 °C | — |
| Maximum operating temperatureTmax | — | 120 °C | — |
| Classification | |||
| Official Category Path | — | — | Needle roller bearings - Heavy-duty needle roller bearings - Metric series, caged, without inner ring |
| Official Classification 1 | — | — | Needle roller bearings / Heavy-duty needle roller bearings / Metric series, caged, without inner ring |
| Dimensions | |||
| Bore diameter of needle roller complement | 21.0 mm | — | — |
| Engineering — Abutment dimensions | |||
| Diameter of housing abutmentD a | max. 27 mm | — | — |
| Fillet radiusr a | max. 0.3 mm | — | — |
| Engineering — Associated seals | |||
| Radial shaft seal with a low cross-sectional height, single lip | G 21x29x4 | — | — |
| Engineering — Dimensions | |||
| Diameter under rollersF w | 21 mm | — | — |
| Chamfer dimension outer ringr 1,2 | min. 0.3 mm | — | — |
| Logistics | |||
| Product net weight | 0.028 kg | — | — |
| eClass code | 23-05-09-03 | — | — |
| UNSPSC code | 31171512 | — | — |
| Manufacturer Identity | |||
| Schaeffler Product Code | — | 382931 | — |
| Official Class Key | — | — | 090-030-010 |
| Base Type | — | NK21/16 | — |
| Old Designation | — | ["NK21/16"] | — |
| Gpsd Group | — | I01 | — |
| Product Line Id | — | 09 | — |
| X Life Marking | — | XL | — |
| Product identity | |||
| Official product category | Needle roller bearings | — | — |
| Official taxonomy path | /products/rolling-bearings/roller-bearings/needle-roller-bearings/needle-roller-bearings-with-machined-rings | — | — |
| Structure group ID | BN1_002 | — | — |
| Available from SKF | Yes | — | — |
| Remanufacturable | No | — | — |
| Product Identity | |||
| Construction | — | Needle roller bearings NK, light series | — |
| Short Description | — | Needle roller bearing | — |
| Properties | |||
| Bearing part | Bearing without inner ring | — | — |
| Number of rows | 1 | — | — |
| Outer ring type | Machined (solid) | — | — |
| Aligning feature | Without | — | — |
| Number of flanges, outer ring | 2 | — | — |
| Tolerance class | Normal | — | — |
| Material, bearing | Bearing steel | — | — |
| Coating | Without | — | — |
| Relubrication feature | With | — | — |
| Indicative carbon footprint for new product | 0.1 kg CO 2 e | — | — |
| Technical Data | |||
| Fw | — | — | 21 mm |
| D | — | — | 29 mm |
| C | — | — | 16 mm |
| R(Min.) | — | — | 0.3 mm |
| Basic Load Ratings : Cr | — | — | 15.3 kN |
| Basic Load Ratings : C0R | — | — | 21.6 kN |
| Under Roller Diameter (Fw) | — | 21 mm | — |
| Fatigue Load Limit : Cu | — | — | 3.30 kN |
| Outside Diamater (D) | — | 29 mm | — |
| Limiting Speeds(Grease Lub.) | — | — | 14000 min-1 |
| Width, Outer Ring (C) | — | 16 mm | — |
| Limiting Speeds(Oil Lub.) | — | — | 21000 min-1 |
| Basic Dynamic Load Rating, Radial (Cr) | — | 15,200 N | — |
| (Refer.)Mass | — | — | 0.032? kg |
| Basic Static Load Rating, Radial (C0R) | — | 18,700 N | — |
| Mass(Refer.) | — | — | 0.032? kg |
| Operating Temperature Min. (Tmin) | — | -30 °C | — |
| Operating Temperature Max. (Tmax) | — | 120 °C | — |
| Limiting Speed (Limiting Spe) | — | 20,600 1/min | — |
| Reference Speed (Nϑr) | — | 12,600 1/min | — |
| Minimum Chamfer Dimension (Rmin) | — | 0.3 mm | — |
| Fatigue Load Limit, Radial (Cur) | — | 3,500 N | — |
Automatic matching is a search aid, not an interchangeability declaration. Confirm the full suffix, tolerances, internal design and application limits before substitution.